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1.
Braz. dent. sci ; 26(1): 1-9, 2023. ilus
Article in English | LILACS, BBO | ID: biblio-1413593

ABSTRACT

Although much progress has been obtained in terms of the Endodontic treatment, the literature shows that true success can be only achieved with adequate coronal seal to avoid bacterial contamination, and protect the tooth structure from fracture. There are many options available to the clinician to restore the endodontically treated tooth; however, there is not much evidence available on what alternative is better than another. This review will critically present the current knowledge on restorative choices, including posts and endocrowns, showing advantages and disadvantages of different treatment forms. With this knowledge, we will also introduce the concept of biomimetics to endodontically treated teeth, and how the nature of their remaining tooth structure can benefit from this approach. This concept entails the use of mechanisms and biologically produced materials to restore a tooth in a way that would mimic its natural structure, with the purpose of achieving better long-term prognosis (AU)


Embora tenha se obtido progresso em relação ao tratamento endodôntico, a literatura mostra que o sucesso real só pode ser atingido com o selamento coronal adequado, para evitar-se a contaminação bacteriana e proteger-se a estrutura dental de fraturas. Há muitas opções disponíveis para o clínico para a restauração do dente tratado endodonticamente; entretanto, não há muita evidência disponível sobre qual alternativa é melhor que a outra. Esta revisão apresentará criticamente o conhecimento atual sobre opções restauradoras, incluindo retentores intraradiculares e endocrowns, mostrando vantagens e desvantagens das diferentes formas de tratamento. Com esse conhecimento, também introduziremos o conceito de biomimética, uma vez que dentes tratados endodonticamente, devido a natureza de sua estrutura dental remanescente, podem se beneficiar desta abordagem. Esse conceito envolve o uso de mecanismos e materiais produzidos biologicamente para restaurar um dente de forma a imitar a estrutura natural, com o objetivo de alcançar melhor prognóstico de longo-prazo.(AU)


Subject(s)
Tooth , Biomimetics , Endodontics , Fractures, Bone
2.
J. Health Biol. Sci. (Online) ; 10(1): 1-5, 01/jan./2022.
Article in English | LILACS | ID: biblio-1411517

ABSTRACT

Objective: Understand whether the collection site (toothless or toothless) influences the frequency of bacteria in the oral cavity. It was performed as an observational, prospective, and cross-sectional study. Methods: Clinical samples of the oral surfaces of the teeth and/or cheek mucosa were collected in the oral cavity of 37 patients who underwent elective cardiac surgery in the preoperative period from May to July 2019. The clinical samples collected were subjected to identification of colonies and antimicrobial sensitivity tests. Results: It was observed that regardless of whether the collection site is toothless or toothless, the microbial profile, socio-demographic variables, comorbidities, and risk factors do not statistically influence the choice of the collection site. Conclusions: there wasn't statistical difference between the strains found at the collection sites. Practical Implications: the result found is relevant for other researchers that will work with oral cavity collections since the chosen collection site will not influence the frequency of strains found.


Objetivo: Compreender se o local de coleta (com dentes ou desdentado) influencia na frequência de bactérias na cavidade oral. Foi realizado como um estudo observacional, prospectivo e transversal. Métodos: Amostras clínicas das superfícies orais dos dentes e/ou mucosa jugal foram coletadas na cavidade oral de 37 pacientes submetidos à cirurgia cardíaca eletiva no período pré-operatório de maio a julho de 2019. As amostras clínicas coletadas foram submetidas à identificação de colônias e testes antimicrobianos de sensibilidade. Resultados: Observou-se que independente do local de coleta ser dentado ou desdentado, o perfil microbiano, variáveis sociodemográficas, comorbidades e fatores de risco não influenciam estatisticamente na escolha do local de coleta. Conclusões: Não houve diferença estatística entre as cepas encontradas nos locais de coleta. O resultado encontrado é relevante para outros pesquisadores que trabalharão com coletas de cavidade oral, pois o local de coleta escolhido não influenciará na frequência de cepas encontradas.


Subject(s)
Dental Plaque , Mouth , Bacteria , Tooth , Oral Health , Biofilms , Infections
3.
Braz. j. oral sci ; 21: e222812, jan.-dez. 2022. tab
Article in English | LILACS, BBO | ID: biblio-1348712

ABSTRACT

Aim: To evaluate the influence of the parameters L* a* b* on the variation of the color of bovine tooth enamel submitted to artificial darkening, after simulated brushing, with whitening toothpastes containing blue covarine. Methods: To undertake this study in vitro, 60 specimens (SP) were divided into 6 groups (n=10): control group (CGwater) and 5 test groups (GT1-Colgate Total 12, GT2-Oral-B 3D White Perfection, GT3- Colgate Luminous Instant White, GT4-CloseUp White Diamond Attraction, GT5-Sorriso Xtreme White). The specimens were darkened with coffee and submitted to simulated brushing for 6, 12, and 24 months. The alteration in the color was evaluated using CIELAB parameters and the ΔL, Δa, Δb and ΔE were calculated. The data was analyzed through generalized linear models using the R program and considering a level of significance of 5%. Results: The parameters L*, a* and the ΔL, Δa obtained better results in the test group than in the control group. There were no statistical differences between CG and the test groups for the evaluation of the b* parameter. In the evaluation of the Δb, the GT3 differed statistically from the CG. In relation to the ΔE, all the group tests showed a variation in color statistically greater than that of the CG and the GT4 showed the greatest variation, not differing from the GT3 during the periods studied. Conclusion: The mechanical and optical whitening agents positively influenced the values L*a* and b*, as well as in its variations and in the ΔE. It is important to emphasize, however, that to analyze tooth whitening it is necessary to evaluate their parameters together


Subject(s)
Tooth , Toothpastes , Color , Bleaching Agents
4.
Acta odontol. Colomb. (En linea) ; 12(2): 61-77, Jul-Dec. 2022. tab, graf
Article in Spanish | LILACS | ID: biblio-1397171

ABSTRACT

Objetivo: establecer los parámetros para la evaluación visual e instrumental del color dental en estudios in-vitro a partir de la literatura científca publicada entre 2015 y 2021. Métodos: se realizó la búsqueda en las bases de datos: PubMed, Web of Science, Science Direct, Scopus, Scielo y Lilacs; también en el motor de búsqueda Google Académico y las bibliotecas de las editoriales Wiley y Springer. Las palabras clave utilizadas fueron tooth, color, in-vitro, color perception, shade matching, thresholds, appearance, surrounding, "CIELAB" y "CIEDE2000". Teniendo en cuenta los criterios de elegibilidad, se seleccionaron los estudios de acuerdo al título, resumen y texto completo. Resultados: la búsqueda arrojó un total de 37 publicaciones que se agruparon en tres tópicos: 1. toma de color visual: condiciones ambientales, observadores y nivelación; 2. toma de color instrumental: instrumentos; y 3. procesamiento de datos: cálculo de la diferencia de color y umbrales de perceptibilidad (PT) y aceptabilidad (AT). Conclusiones: los aspectos más importantes en la evaluación visual son la iluminación, el ambiente para registro (sitio, entorno y fondo alrededor de la muestra), las condiciones geométricas de visualización, los observadores y el uso de guías. En la evaluación instrumental es relevante elegir el aparato apropiado de acuerdo con su precisión y reproducibilidad, como los espectroradiómetros y los espectrofotómetros de uso clínico. Se presenta el procesamiento de datos para establecer las variaciones de cada coordenada, las diferencias de color (ΔE): CIELAB y CIEDE2000, los umbrales y los lineamientos.


Objective: To establish the parameters for the visual and instrumental evaluation of tooth color in in-vitro studies based on the scientifc literature published between 2015 and 2021. Methods: The search was carried out in the databases of PubMed, Web of Science, Science Direct, Scopus, Scielo, Lilacs; search engine Google Scholar and publishers' library of Wiley and Scielo, using the keywords "tooth", "color", "in vitro", "color perception", "shade matching", "thresholds", "appearance", "surrounding", "CIELAB", and "CIEDE2000". The literature was selected according to the title, abstract and full text taking into the eligibility criteria. Results: It yielded a total of 37 publications, which were grouped into three topics: 1. visual color acquisition: environmental conditions for color acquisition, observers and levelling. 2. instrumental color sampling: instruments. 3. Data processing: Calculation of color diference and perception thresholds (PT) and acceptability thresholds (AT). Conclusions: The most important aspects in the visual assessment are lighting, the environment for color registration (site, environment and background around the sample), the geometric conditions of visualization, the observers and the use of guides. Regarding the instrumental assessment of color, the appropriate devices must be chosen according to its precision and reproducibility, being the spectrophotometers and spectroradiometers the most precise ones. It is presented how the data processing is carried out to establish the variations of each coordinate, the color diferences (ΔE): CIELAB and CIEDE2000, thresholds and guidelines.


Subject(s)
Tooth , Color Perception , In Vitro Techniques , Differential Threshold
5.
An. Fac. Cienc. Méd. (Asunción) ; 55(2): 105-111, 20220801.
Article in Spanish | LILACS | ID: biblio-1380455

ABSTRACT

Introducción: El presente artículo ahonda en las teorías más aceptadas sobre el proceso de erupción dental en la literatura de hoy en día y, desde este enfoque, expone el caso clínico de una paciente de 12 años de edad que presentaba retención de caninos y molares temporales. A dicha paciente se le trató clínicamente mediante exodoncias seriadas y se muestra su evolución posterior al tratamiento dental. Objetivos: Lograr entender de mejor manera el proceso de la erupción dental en base a la actual bibliografía. Materiales y métodos: Se realizó una revisión bibliográfica con palabras claves: "erupción dental", "extracciones seriadas", "retención dental" y "evolución dental". La paciente fue evaluada y tratada ortodóncicamente, mediante extracciones seriadas y se realizaron controles dentales periódicos con toma de radiografía panorámica para evaluar su evolución. Conclusión: El folículo dental y el retículo estrellado son las estructuras encargadas de generar el proceso eruptivo del diente mediante la interacción de diversas moléculas. Estas moléculas deben encajar dentro de un contexto para que cada diente erupcione de manera independiente.


Introduction: This article delves into the most accepted theories about the dental eruption process in today's literature and, from this perspective, presents the clinical case of a 12-year-old patient who presented retention of temporary canines and molars. This patient was treated clinically by means of serial extractions and her evolution after dental treatment is shown. Objectives: This article delves into the most accepted theories about the dental eruption process in today's literature and, from this perspective, presents the clinical case of a 12-year-old patient who presented retention of temporary canines and molars. This patient was treated clinically by means of serial extractions and her evolution after dental treatment is shown. Materials and methods: A bibliographic review was carried out with key words: "dental eruption", "serial extractions", "dental retention" and "dental evolution". The patient was evaluated and treated orthodontically by serial extractions and periodic dental check-ups were carried out with panoramic radiography to evaluate her evolution. Conclusion: The dental follicle and the stellate reticulum are the structures responsible for generating the eruptive process of the tooth through the interaction of various molecules. These molecules must fit into a context for each tooth to erupt independently.


Subject(s)
Tooth Eruption , Tooth
6.
Rev. Círc. Argent. Odontol ; 80(231): 19-23, jul. 2022. ilus
Article in Spanish | LILACS | ID: biblio-1392286

ABSTRACT

En el campo de la odontología, prevalecen actualmente alternativas terapéuticas con una filosofía conservadora. Sin embargo, con el advenimiento de los tratamientos con células madre (CM), se amplían las posibilidades terapéuticas, que buscan la combinación y el equilibrio entre la intervención tradicional y las posibilidades de reposición de estructuras anatómicas dañadas, a través de la regeneración de tejidos utilizando células madre o sus derivados (AU)


In the dentistry field, therapeutic alternatives with a conservative philosophy currently prevail. However, with the advent of stem cell (SC) treatments, therapeutic possibilities are expanding, seeking a combination and balance between traditional intervention and the pos- sibility of replacing damaged anatomical structures through tissue regeneration, using stem cells or their derivatives (AU)


Subject(s)
Humans , Stem Cells , Tissue Engineering , Mesenchymal Stem Cells/physiology , Periodontal Ligament/physiology , Regeneration/physiology , Tooth/cytology , Tooth Germ/physiology , Biocompatible Materials/therapeutic use , Bone Regeneration/physiology , Dental Pulp/physiology , Tissue Scaffolds , COVID-19/therapy
7.
Rev. cuba. estomatol ; 59(2): e3743, abr.-jun. 2022. graf
Article in Spanish | LILACS, CUMED | ID: biblio-1408390

ABSTRACT

Introducción: El "diente rosado" es un fenómeno post mortem. Se caracteriza por una tonalidad rosa, rojiza y hasta púrpura, que puede observarse en los dientes. Su primera referencia se remite a 1829, cuando Thomas Bell lo describió, y genera polémica desde hace casi dos siglos. La temática plantea varias interrogantes: ¿sería más lógico nombrarlo "red teeth" o "purple teeth"?, ¿qué provoca esa tonalidad más intensa?, ¿la coloración rosada indica determinada causa de muerte?, ¿queda para siempre o puede desaparecer por diversos factores? Objetivo: Describir los indicadores de que el "diente rosado" o "pink teeth" pueda aún ser considerado un elemento importante para la investigación forense actual. Comentarios principales: Luego de la experiencia acumulada con los casos trabajados durante los últimos 20 años y la revisión bibliográfica realizada, se evidencia que el fenómeno aparece sobre todo en las piezas dentales anteriores y premolares monorradiculares. Además, puede verse tanto ante mortem como post mortem. Por causas diferentes el post mortem necesita de varios días para instaurarse y es un evento tafonómico, evidenciable tanto en muertes violentas como naturales, aunque la variación en su tonalidad depende de diversos factores. Consideraciones globales: Teniendo en cuenta la experiencia obtenida por los autores, y lo referido en la bibliografía sobre el tema, se evidencia que este signo, fenómeno o hallazgo (al aclararse las interrogantes planteadas) aún puede ser muy significativo y orientador en el contexto forense actual(AU)


Introduction: "Pink teeth" are a post-mortem phenomenon characterized by a rose, reddish and even purple shade of color which may be observed in teeth. Their first reference dates back to 1829, when Thomas Bell described them. They have been a topic of debate for almost two centuries. The subject poses several questions: Would it be more logical to name them "red teeth" or "purple teeth"? What causes the increase in color intensity? Does the pink shade signal a specific cause of death? Does it remain forever or may it disappear for a variety of reasons? Objective: Describe the indicators that "pink teeth" may still be considered an important element in current forensic research. Main remarks: Based on the experience gathered from the cases analyzed in the last 20 years and the bibliographic review conducted, it is evident that the phenomenon appears mainly in anterior teeth and single-rooted premolars. On the other hand, pink teeth may be observed ante mortem as well as post mortem. For a number of reasons, post mortem pink teeth take several days to form, and they are a taphonomic phenomenon, present in violent as well as natural deaths, though their change in tone depends on various factors. General considerations: Founded on the experience obtained by the authors and the bibliography about the topic, it is evident that this sign, phenomenon or finding (upon clarification of the questions posed) may still be very significant and enlightening in the current forensic context(AU)


Subject(s)
Humans , Postmortem Changes , Tooth/pathology , Forensic Dentistry/methods , Chronology as Topic
8.
Rev. flum. odontol ; 1(57): 1-8, jan.-abr. 2022.
Article in Portuguese | LILACS, BBO | ID: biblio-1391233

ABSTRACT

O Banco de Dentes Humanos (BDH) é uma instituição sem fins lucrativos, vinculada a uma faculdade, universidade ou instituição com o propósito de suprir as necessidades acadêmicas, através do fornecimento de dentes humanos para estudo e treinamento laboratorial dos alunos dos cursos de graduação e pós-graduação. Assim, o presente trabalho teve como objetivo relatar os métodos utilizados para captação, tratamento, seleção, preservação, armazenamento e reutilização de dentes humanos extraídos, realizados por alunos da Faculdade de Odontologia (FO) da Universidade Federal Fluminense (UFF) através de dois projetos deferidos junto a PROAES-UFF. Para isso, foram realizadas campanhas de conscientização e programas de divulgação para a doação de dentes humanos extraídos permanentes e decíduos tanto para a comunidade científica odontológica como para a comunidade leiga. Após 24 meses, foram captados um total de 2.536 dentes, sendo 346 molares superiores, 279 molares inferiores, 262 pré-molares superiores, 418 pré-molares inferiores, 343 caninos, 296 incisivos superiores e 592 incisivos inferiores. As campanhas e ações dos projetos da PROAES-UFF foram eficientes para coletar dentes humanos, suprindo as atividades laboratoriais de diversas disciplinas na graduação e também servindo de estoque para a futura implementação do BDH da FO-UFF.


The Human Teeth Bank (HTB) is a non-profit institution, linked to a college, university or institution with the purpose of meeting academic needs, through the provision of human teeth for study and laboratory training of undergraduate and postgraduate students. Thus, this study aimed to report the methods of capture, treatment, selection, preservation, storage and reuse of extracted human teeth, carried out by students from the Faculty of Dentistry (FO) of Universidade Federal Fluminense (UFF) through two projects approved by PROAES-UFF. To this end, awareness campaigns and outreach programs were carried out for the donation of human teeth extracted, permanent and deciduous, both for the dental scientific community and for the lay community. After 24 months, a total of 2,536 teeth were captured, with 346 upper molars, 279 lower molars, 262 upper premolars, 418 lower premolars, 343 canines, 296 upper incisors and 592 lower incisors. The campaigns and actions of PROAES-UFF projects were efficient in collecting human teeth, supplying the laboratory activities of several disciplines during graduation and also serving as a stock for a future implementation of the HTB of FO-UFF.


Subject(s)
Schools, Dental , Specimen Handling , Tooth , Planning Techniques
9.
Article in Chinese | WPRIM | ID: wpr-936134

ABSTRACT

OBJECTIVE@#To automatically construct lips symmetry reference plane (SRP) based on posed smile, and to evaluate its advantages over conventional digital aesthetic design.@*METHODS@#Eighteen subjects' three-dimensional facial and dentition data were gathered in this study. The lips SRP of experimental groups were used with the standard weighted Procrustes analysis (WPA) algorithm and iterative closest point (ICP), respectively. A reference plane defined by experts based on regional ICP algorithm, served as the truth plane. The angle error values between the lips SRP of WPA algorithm in the experimental groups and the truth plane were evaluated in this study, and the lips SRP of ICP algorithm of the experimental groups was calculated in the same way. The lips SRP based on posed smile as a reference for aesthetic design and evaluate preliminary clinical application.@*RESULTS@#The average angle error between the lips SRP of WPA algorithm and the truth plane was 1.78°±1.24°, which was smaller than that between the lips SRP of ICP and the truth plane 7.41°±4.31°. There were significant differences in the angle errors among the groups (P < 0.05). In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile and the original symmetry plane by re-ference compared with the prosthetic design, the subjects' scores on the lips SRP of WPA algorithm based on posed smile (8.48±0.57) were higher than those on the original symmetry plane (5.20±1.31).@*CONCLUSION@#Automatically constructing the lips SRP of WPA algorithm based on posed smile was more accurate than ICP algorithm, which was consistent with the truth plane. Moreover, it can provide an important reference for oral aesthetic diagnosis and aesthetic analysis of the restoration effect. In the aesthetic design of anterior teeth, automatically constructing the lips SRP of WPA algorithm based on posed smile can improve the patients' satisfaction in esthetic rehabilitation.


Subject(s)
Esthetics, Dental , Humans , Lip , Smiling , Tooth , Workflow
10.
Chinese Journal of Stomatology ; (12): 495-502, 2022.
Article in Chinese | WPRIM | ID: wpr-935892

ABSTRACT

Objective: To screen and analyze the factors affecting the prognosis of replacing single missing tooth by autograft tooth, so as to provide reference for clinical judgment of surgical prognosis. Methods: A total of 176 patients (188 teeth) underwent autotransplantation of teeth in the Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University from January 2017 to December 2019, including 85 teeth of males and 103 teeth of females were involved. The age was (33.0±9.8) years (16-65 years). The possible factors affecting the prognosis of replacing single missing tooth by autograft tooth were summarized and grouped, and the clinical and imaging data were recorded and judged. The surgical records and photographic data from the patients' previous medical records were retrospectively analyzed. The survival analysis method was used for statistical analysis to screen out the factors affecting the cumulative survival rate of transplanted teeth. Results: The 5-year cumulative survival rate of 188 transplanted teeth was 88.4%. Univariate Log-Rank analysis showed that age (P<0.001), sex (P=0.008), smoking (P<0.001), position of recipient area (P<0.001), height of alveolar bone in recipient area (P<0.001), time of donor tooth in vitro (P<0.001), use of donor model (P<0.001) and initial stability (P<0.001) were significantly correlated with cumulative survival rate of transplanted teeth. Multivariate Cox proportional hazard regression analysis showed that smoking (β=-2.812, P=0.049), alveolar bone height (β=1.521, P=0.020), donor time (β=-2.001, P=0.019), use of donor model (β=1.666, P=0.034) and initial stability (β=-1.417, P=0.033) were significantly correlated with the cumulative survival rate of transplanted teeth. Conclusions: The prognosis of autogenous tooth transplantation can be predicted by smoking, height of alveolar bone in recipient area, time of donor teeth in vitro, use of donor model and initial stability. Good prognosis of transplanted teeth can be obtained by using donor model during operation, reducing the time of donor teeth in vitro, taking effective methods to restore alveolar bone height, maintaining good initial stability, and good oral health education after operation.


Subject(s)
Adult , Female , Humans , Male , Prognosis , Retrospective Studies , Tooth/transplantation , Tooth Loss , Transplantation, Autologous , Treatment Outcome , Young Adult
11.
African Journal of Dentistry and Implantology ; 22: 8-12, 2022. tales, figures
Article in French | AIM | ID: biblio-1399959

ABSTRACT

Le diastème du grec diastèmà (interstice) se définit comme étant l'existence d'espace entre les dents d'une même arcade. Les objectifs de l'étude étaient de déterminer le profil épidémiologique des diastèmes; décrire les formes cliniques rencontrées, assurer une prise en charge. PATIENTS ET MÉTHODE: Il s'agissait d'une étude prospective de type descriptif effectuée à l'hôpital national Donka, elle avait duré sept mois, allant du 1er Mars au 30 septembre 2019. RÉSULTATS: Le sexe féminin prédominait avec 77,7% contre 22,2 % de sexe masculin, donnant un ratio (f/h) = 3,5. La tranche d'âge de 21-23 ans (tout sexe confondu) était la plus représentée avec un pourcentage de 44,4%. La tonicité du frein labial médian avec 29,62% était l'étiologie principale du diastème inter incisif. Le diastème était plus fréquent au maxillaire avec des valeurs respectives de 33,33% de diastème des dents du bloc incisivo canin et 29,62% de diastème inter incisif soit au total 62,96 %. Le traitement fut chirurgical, orthodontique et prothétique. CONCLUSION:Le diastème reste l'une des anomalies orthodontiques fréquente dans nos pays. Considéré par certains comme un excès de place sur l'arcade dentaire, il est cependant apprécié par d'autres, surtout en Afrique de l'ouest où il est souvent considéré par la population comme signe de chance, de beauté, d'où son impact socio-culturel.


Subject(s)
Humans , Tooth , Diastema , Therapeutics , Health Profile , Off-Label Use
12.
Rev. odontopediatr. latinoam ; 12(1): 202522, 2022. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1417074

ABSTRACT

El cepillado dental es el método tradicional reconocido para eliminar la biopelícula. Objetivo: Evaluar la relación entre edad y cepillado dental, así como la asociación entre hábitos de cepillado dental y presencia de caries en un grupo de escolares de Montevideo, Uruguay. Material y métodos: Se realizó un estudio observacional, transversal, analítico, en 127 escolares de 4 a 11 años de edad, en Montevideo, Uruguay. Se realizó una encuesta a los padres en relación a los hábitos de cepillado dental de sus hijos y se estudiaron las variables tiempo de cepillado, Índice de Higiene Oral simplificado y se registró el índice para caries dental ICDAS. Resultados: La edad media de los participantes fue 7,93 años (DS ± 1,95). El tiempo promedio de cepillado fue de 47 segundos (DS ± 27 segundos). Los tiempos de cepillado que reportaron los padres difirieron significativamente de los observados en los niños. Al aumentar la edad, el tiempo de cepillado también aumentaba. Se ajustó un modelo de regresión múltiple para analizar la relación entre la disminución en la magnitud del IHOS debido al cepillado y las variables edad, género, tiempo de cepillado y ayuda en el cepillado. Se verificó asociación entre las variables ayuda y/o supervisión en el cepillado y presencia o no de caries dental. Conclusiones: Se encontró una relación significativa entre cepillado dental, edad y tiempo de cepillado en la población estudiada. A mayor edad, mayor tiempo de cepillado y mejor resultado en el índice de higiene oral. Los niños que recibían supervisión o ayuda de los padres fueron los que presentaron menos lesiones de caries.


A escovação dentária é o método tradicional reconhecido para a remoção do biofilme. Objetivo: Avaliar a relação entre idade e escovação dentária, bem como a associação entre hábitos de escovação dentária e a presença de cáries em um grupo de escolares em Montevidéu, Uruguai. Material e métodos: Um estudo observacional, transversal, analítico foi realizado em 127 escolares de 4 a 11 anos, em Montevidéu, Uruguai. Foi realizada um levantamento dos pais sobre os hábitos de escovação dentária de seus filhos e as variáveis foram estudadas para o tempo de escovação, índice simplificado de higiene bucal e o índice de cárie dentária do ICDAS. Resultados: A idade média dos participantes foi de 7,93 anos (DS s 1,95). O tempo médio de escovação foi de 47 segundos (DS x 27 segundos). Os tempos de escovação relatados pelos pais diferiram significativamente daqueles observados nas crianças. À medida que a idade aumentava, o tempo de escovação também aumentava. Um modelo de regressão múltipla foi ajustado para analisar a relação entre a diminuição da magnitude do IHOS devido à escovação e as variáveis de idade, sexo, tempo de escovação e auxílio de escovação. Houve associação entre as variáveis ajuda e/ou supervisão na escovação e presença ou não de cárie dentária Conclusões: Verificou-se uma relação significativa entre escovação dentária, idade e tempo de escovação na população estudada. Quanto mais velho, maior o tempo de escovação e melhor resultado no índice de higiene bucal. As crianças que receberam a supervisão ou a ajuda dos pais eram essas com menos os ferimentos da cavidade


Dental brushing is the recognized traditional method for removing the biofilm. Objective: To evaluate the relationship between age and toothbrushing, as well as the association between toothbrushing and caries lesions in schoolchildren in Montevideo, Uruguay. Material and methods: An observational, cross sectional and analytic study was carried on 127 schoolchildren aged 4 to 11 years old, in Montevideo, Uruguay. The parents were asked about the oral health habits of their children through a questionnaire, and the variables toothbrushing time, Simplified Oral Hygiene Index and ICDAS index were registered. Results: Mean age of the children was 7,93 years (SD ± 1,95). Mean time of toothbrushing was 47 seconds (DS ± 27 seconds). The toothbrushing times reported by the parents differed significantly from those observed in the children. As age increased, brushing time also increased. A multiple regression model was adjusted to analyze the relationship between the decrease in the magnitude of IHOS due to toothbrushing and the variables age, toothbrushing time and brushing aid. There was an association between the variables help and / or supervision in brushing and presence or not of dental caries. Conclusions: A significant relationship was found between toothbrushing, age, gender and brushing time in this group of children. When the age was higher, they spent more time brushing their teeth and they had better results in oral hygiene index. Children who had parents help or supervision had lower caries lesions


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Toothbrushing , Oral Hygiene Index , Oral Hygiene , Tooth , Oral Health , Biofilms , Richter Scale , Dental Caries , Insemination, Artificial, Heterologous
13.
Int. j. morphol ; 40(2): 407-413, 2022. ilus
Article in English | LILACS-Express | LILACS | ID: biblio-1385603

ABSTRACT

SUMMARY: This study aims to extract teeth and alveolar bone structures in CBCT images automatically, which is a key step in CBCT image analysis in the field of stomatology. In this study, semantic segmentation was used for automatic segmentation. Five marked classes of CBCT images were input for U-net neural network training. Tooth hard tissue (including enamel, dentin, and cementum), dental pulp cavity, cortical bone, cancellous bone, and other tissues were marked manually in each class. The output data were from different regions of interest. The network configuration and training parameters were optimized and adjusted according to the prediction effect. This method can be used to segment teeth and peripheral bone structures using CBCT. The time of the automatic segmentation process for each CBCT was less than 13 min. The Dice of the evaluation reference image was 98 %. The U-net model combined with the watershed method can effectively segment the teeth, pulp cavity, and cortical bone in CBCT images. It can provide morphological information for clinical treatment.


RESUMEN: El objetivo del presente estudio fue extraer estructuras dentarias y óseas alveolares desde imágenes CBCT automáticamente, lo cual es un paso clave en el análisis de imágenes CBCT en el campo de la estomatología. En este estudio, se utilizó la segmentación de tipo emántica para la segmentación automática. Se ingresaron cinco clases de imágenes CBCT marcadas, para el entrenamiento de la red neuronal U-net. El tejido duro del diente (incluidos esmalte, dentina y cemento), la cavidad de la pulpa dentaria, hueso cortical, hueso esponjoso y otros tejidos se marcaron manualmente en cada clase. Los datos se obtuvieron de diferentes regiones de interés. La configuración de la red y los parámetros de entrenamiento se optimizaron y ajustaron de acuerdo con un análisis predictivo. Este método se puede utilizar para segmentar dientes y estructuras óseas periféricas mediante CBCT. El tiempo del proceso de segmentación automática para cada CBCT fue menor a 13 min. El "Dice" de evaluación de la imagen de referencia fue de 98 %. El modelo U-net combinado con el método "watershed"puede segmentar eficazmente los dientes, la cavidad pulpar y el hueso cortical en imágenes CBCT. Puede proporcionar información morfológica para el tratamiento clínico.


Subject(s)
Humans , Tooth/diagnostic imaging , Dental Pulp/diagnostic imaging , Cone-Beam Computed Tomography , Tooth/anatomy & histology , Artificial Intelligence , Dental Pulp/anatomy & histology , Nerve Net
14.
Int. j. morphol ; 40(2): 530-539, 2022. ilus, tab
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1385613

ABSTRACT

RESUMEN: En salmonicultura se utilizan imágenes de rayos X, para evaluar la columna vertebral y las aletas, pero estas no permiten cuantificar los minerales que constituyen el hueso, para esto se utilizan otras técnicas que son destructivas. La Microscopía Electrónica de Barrido de presión variable (VP SEM) acoplada al detector espectroscopia de rayos X de energía dispersiva (EDX) acoplado, nos permite analizar la microestructura y a la vez determinar elementos químicos, porcentaje y distribución presentes en puntos específicos en una muestra. Se utilizaron 5 truchas control y 5 con deformidad mandibular, de agua dulce en etapa de smolt, se analizó la estructura y mineralización del hueso, se eligieron en promedio 6 puntos de cuantificación por región de interés y se analizaron mediante Microscopía Electrónica de Barrido (VP SEM-EDX). Los datos obtenidos muestran porcentaje en masa de Ca promedio en hueso articular de truchas fueron de 8.07 % y de 14.48 % en truchas con deformidad mandibular y control respectivamente y el porcentaje en masa promedio de P es de 4.07 % y 7.60 %, en truchas con deformidad mandibular y control respectivamente. Se identificó además otros elementos presentes en la muestra como Mg, Na, C, O, N, S, F, Zn, Al y Fe, con especial interés en el aumento de carbono en las muestras analizadas con deformidad mandibular y la presencia de aluminio en todas las muestras. La Técnica de VP SEM-EDX, permite evaluar de forma directa, sin destrucción de la muestra y con una preparación mínima de la muestra. En el hueso, la aplicación más frecuente de SEM-EDX es la medición del contenido de Ca y P y la relación que existe entre estos elementos Ca/P, en la muestra. Paralelamente la técnica nos permite la detección de otros microelementos provenientes del agua o de la alimentación y que eventualmente pueden provocar alteraciones en los peces, confirmando la hipótesis que el microanálisis elemental tiene utilidad para la salmonicultura.


SUMMARY: In salmon farming systems, X-ray images are used to evaluate the spine and fins, but these do not allow quantifying the minerals that make up the bone, for different techniques that are destructive are used. Variable Pressure Scanning Electron Microscopy (VP SEM) coupled to an Energy Dispersive X-ray spectroscopy detector (EDX), allows us to analyze the microstructure and at the same time determine chemical elements, percentages, and distribution present at specific points in a sample. Five control and five jaw deformity trout, from freshwater and in the smolt stage were used. The structure and mineralization of the bone were analyzed, an average six quantification points were chosen per region of interest (ROI) and then they were analyzed by Scanning Electron Microscopy (VP SEM-EDX). The data obtained have shown the average mass percentage of calcium in trout joint bone was 8.07 % and 14.48 % in jaw deformity and control trout, respectively; and the average mass percentage of phosphorus is 4.07 % and 7.60 %, in jaw deformity and control trout, respectively. Other elements present in the sample were also identified, such as magnesium, sodium, carbon, oxygen, nitrogen, sulphur, fluorine, zinc, aluminium, and iron, with special interest the increase of carbon in the analyzed samples with mandibular deformity and the presence of aluminum in all samples. The VP SEM-EDX Technique allows direct evaluation, without destruction of the sample and with minimal sample preparation. In bone, the most frequent application of SEM-EDX is the measurement of the content of calcium (Ca) and phosphorus (P) and the relationship that exists between these elements, calcium/phosphorus (Ca/P), in the sample. At the same time, the technique allows us to detect other microelements from water or food that can eventually cause alterations in fish, confirming the hypothesis that elemental microanalysis is useful for salmon farming.


Subject(s)
Animals , Tooth/chemistry , Oncorhynchus mykiss , Mandible/chemistry , Minerals/analysis , Spectrometry, X-Ray Emission , Tooth/ultrastructure , Microscopy, Electron, Scanning , Mandible/ultrastructure
15.
Braz. J. Pharm. Sci. (Online) ; 58: e19501, 2022. graf
Article in English | LILACS | ID: biblio-1383974

ABSTRACT

Abstract This study reviews the knowledge on the use of conventional dental whitening and the use of enzymes as a new approach in bleaching. A review of the literature was based on academic articles and on patents related to the use of enzymes in dental bleaching. Tooth whitening techniques used nowadays are well reported in the literature, and its mechanism of action consists of an oxidoreduction reaction with the release of free radicals. The great instability of radicals, when in contact with the tissues, promotes oxidation and reduction in the size of the pigment chains incorporated into them. These pigments are eventually broken down into smaller and smaller molecular chains and end up being diffused from the dental structure. In turn, the use of enzymes aimed at tooth whitening can be a less harmful alternative to the tooth because their specificity regarding the substrate makes them of great interest to perform specific reactions, reducing collateral effects. The use of proteolytic enzymes and oxidoreductases paired with the application of peroxides, can be a promising alternative for obtaining even better results in the dental bleaching process.


Subject(s)
Enzymes/analysis , Tooth Bleaching Agents/analysis , Oxidoreductases/administration & dosage , Tooth , Dentistry/classification , Literature
16.
Rev. Ateneo Argent. Odontol ; 66(1): 48-51, 2022.
Article in Spanish | LILACS | ID: biblio-1380370

ABSTRACT

Los dientes animales de las diferentes especies (hu- mano, equino, cerdo, etc.) están constituidos histológi- camente por cuatro tejidos fundamentales. Ellos son: esmalte, dentina, cemento y pulpa dental. Su compo- sición, estructura, morfología y tamaño son disímiles para cada género. Según numerosas investigaciones, los dientes de bovino serían los de elección por ser de fácil obtención y por tener muy pocas, o ninguna, diferencias tanto a nivel macro como microscópico con respecto a los dientes humanos. El objetivo de la presente revisión es aportar información actualizada acerca de las características histológicas de los tejidos dentarios bovinos y profundizar el conocimiento de las similitudes y diferencias de los dientes bovinos y humanos dando soporte a otros estudios compa- rativos y promoviendo la utilización de las piezas dentarias bovinas en trabajos de investigación en odontología (AU)


The animal teeth of the different species (human, equine, pig, etc.) are histologically constituted by four fundamental tissues: enamel, dentin, cement and dental pulp. Their composition, structure, morphology and size are dissimilar for each gender. According to numerous investigations, bovine teeth would be the ones of choice because they are easy to obtain and have very few or no differences, both at the macro and microscopic levels, with respect to human teeth. The objective of this review is to provide updated information about the histological characteristics of bovine dental tissues and deepen the knowledge of the similarities and differences between bovine and human teeth, supporting other comparative studies and promoting the use of bovine dental pieces in research work in dentistry (AU)


Subject(s)
Humans , Animals , Cattle , Tooth/anatomy & histology , Cattle , Dental Research , Dental Cementum/anatomy & histology , Dental Enamel/anatomy & histology , Dental Pulp/anatomy & histology , Dentin/anatomy & histology
17.
Rev. Asoc. Odontol. Argent ; 109(3): 158-163, dic. 2021. tab
Article in Spanish | LILACS | ID: biblio-1370768

ABSTRACT

Objetivo: El objetivo del presente estudio fue analizar el grado de concordancia entre alumnos y docentes de dife- rentes unidades académicas en la evaluación radiográfica de tratamientos endodónticos realizados en dientes humanos "ex vivo". Materiales y métodos: Un docente y un alumno de grado pertenecientes a siete unidades académicas, dos cáte- dras de Endodoncia de Argentina y una de México, Ecuador, España, Chile y Portugal evaluaron radiográficamente 357 tratamientos endodónticos realizados "ex vivo" por estu- diantes de grado. De acuerdo con su criterio individual, de- terminaron si cada uno de esos tratamientos podía ser con- siderado como correcto o incorrecto. El coeficiente Kappa fue utilizado para el análisis estadístico. Resultados: El valor de Kappa fue entre 0,04 y 0,30 considerado como indicador de escasa concordancia y varió según la unidad académica en la que se habían registrado los datos. Conclusión: El nivel de concordancia en la categoriza- ción del resultado de la evaluación radiográfica de tratamien- tos endodónticos varía entre alumnos de grado y docentes de las distintas unidades académicas (AU)


Aim: To analyse the degree of agreement between stu- dents and teachers at different academic units regarding the radiographic evaluation of endodontic treatments performed on human teeth "ex vivo". Materials and methods: One teacher and one student from seven Academic units, two Departments of Endodontics in Argentina and one each in Mexico, Ecuador, Spain, Chile and Portugal conducted a radiographic evaluation of 357 endodontic treatments performed by undergraduate students. According to their individual criteria, they determined wheth- er the treatments were adequate or inadequate. Kappa coeffi- cient was used for statistical analysis. Results: The Kappa value was between 0.04 and 0.30, considered as an indicator of poor agreement, and varied ac- cording to the academic institution where the data had been recorded. Conclusion: The level of agreement in classifying the re- sults of the radiographic evaluation of endodontic treatments varies between undergraduate students and teachers at the different academic units (AU)


Subject(s)
Humans , Root Canal Therapy/statistics & numerical data , Students, Dental , Tooth/diagnostic imaging , Education, Dental , Educational Measurement , Faculty, Dental , Argentina , Portugal , Schools, Dental , Spain , Chile , Ecuador , Mexico
18.
Rev. ABENO ; 21(1): 1241, dez. 2021. ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-1370615

ABSTRACT

Investigou-se o conhecimento de cirurgiões-dentistas acerca dos aspectos ético-legais envolvidos na manipulação e descarte de elementos dentários humanos extraídos. Utilizou-se um questionário semiestruturado, enviado eletronicamente para cirurgiões-dentistas. Asperguntas objetivas foram analisadas pela estatística descritiva e as subjetivas peloDiscurso do Sujeito Coletivo. Dos 208 cirurgiões-dentistasrespondentes, 78,4% reconheceram o elemento dentário como órgão, 98,6% afirmaram ter utilizadodentes humanos para treinamento laboratoriale pesquisa na graduaçãoe pós-graduação, 42,4% obtiveramesses dentesem unidades de saúde, 28,3% em consultórios odontológicos, 22% na instituição de ensino e 2,4% através de compra. Sinalizou-se a doação por unidades de saúdee consultórios odontológicos como forma ideal para aquisição dos dentes (72,11%). Apesar de 75,5% afirmarem conhecer a regulamentação específica, issonão se refletiu nas demais questõesavaliadas. Quanto ao risco biológico na manipulação dos dentes, 88,9% consideraram existir e a análise qualitativa das respostas gerou as categorias "contaminação" e "infecção cruzada". Já sobre a finalidade do Banco de Dentes, 59,6% declararam conhecê-las, emergindo categorias como "ensino e pesquisa" e "comércio ilegal". A despeito desse conhecimento, apenas 43,3% indicaram estar totalmente dispostos a se vinculara um Banco de Dentes para doação.Conclui-se que existe pouco conhecimento quanto aos aspectos ético-legais envolvidos na manipulaçãoe descarte de dentes humanos extraídose que essa insciência se reflete na baixa intenção em se vincular às atividades de um futuro Banco de Dentes instalado no município pesquisado (AU).


It was intended to investigate the knowledge of dental surgeons about the ethical and legal aspects involved in the handling and disposal of extracted human teeth. A semi-structured questionnaire was used, sent electronically to dental surgeons. The objective questions were analyzed by descriptive statistics and the subjective ones by Collective Subject Discourse. Of the 208 dental surgeons who answered the questionnaire, 78.4% recognized the dental element as an organ, 98.6% stated that they used human teeth for laboratory training and research during graduation and post-graduation, 42.4% obtained these teeth in health units, 28.3% in dental offices, 22% in teaching institution and 2.4% through purchase. Donation by health units and dental offices was signaled as the ideal way to acquire the teeth (72.11%). Although 75.5% claimed to know the specific regulation, this was not reflected in the other questions evaluated. As for the biological risk in handling teeth, 88.9% considered it existed and the qualitative analysis of the answers generated the categories "contamination" and "cross infection". As for the purpose of the Tooth Bank, 59.6% said they knew it, and categories such as "teaching and research" and "illegal trade" emerged. Despite this knowledge, only 43.3% indicated that they were totally willing to join a tooth bank for donation. It is concluded that there is little knowledge about the ethical-legal aspects involvedin the handling and disposal of extracted human teeth and that this unawareness is reflected in the low intention of joining the activities of a future Tooth Bank installed in the researched municipality (AU).


Subject(s)
Humans , Tooth/anatomy & histology , Health Knowledge, Attitudes, Practice , Dentists/ethics , Ethics, Dental/education , Cross-Sectional Studies/methods , Surveys and Questionnaires/statistics & numerical data , Data Interpretation, Statistical , Infection Control/instrumentation , Waste Management/methods , Legislation , Qualitative Research
19.
Rev. ABENO ; 21(1): 1255, dez. 2021. tab, graf
Article in Portuguese | LILACS, BBO | ID: biblio-1371185

ABSTRACT

Oobjetivo desteestudofoianalisaro perfil dos usuários do Biobanco de Dentes Humanos da Universidade Federal do Paraná (BDH-UFPR), os serviços mais procurados, se háutilização de dentes obtidos externamentee o grau de satisfaçãodos usuários.Para isso,foi aplicado um questionário eletrônico semiestruturado à comunidade interna do curso de Odontologia daUFPR, entre agosto edezembro de 2019. Um total de 300 questionários foram respondidos, sendo263 por estudantes degraduação, 4 por pós-graduandos, 24 por professores e 9 por servidores técnico-administrativos.A maioria dos estudantes erado sexo feminino entre 17e 22 anos, enquantopara osservidores (professores e técnicos) houve uma distribuição semelhante entre os sexosna faixa etária entre 40e 59 anos. Embora 80,99% dos discentes afirmaram conhecer oBDH-UFPR, apenas 50,19%usaram seus serviçose59,32% relataram játerembuscadodentesexternamente.O serviço mais utilizado foi o empréstimo de dentes para atividades de ensino, porém apenas 42,15% os devolveram após ouso.Os dentes obtidos externamente foram provenientes,principalmente, deconsultórios particulares e apenas 56,33% dos alunosrelataram sempre ter submetido-os à desinfecção/esterilização, sendo a autoclave o método mais indicado. Todos os servidores conheciam o BDH-UFPR e,dentre os professores,a maioria realizoutanto empréstimos quanto doações. Os empréstimostiveram como principal finalidade a pesquisae 63,6% relataramterem devolvido os dentes.Quanto à satisfação, a comunidade acadêmica mostrou-se predominantemente totalmente satisfeita.Por fim, ressalta-se a necessidade de ampliar as ações de conscientização para a comunidade acadêmica quanto aos aspectos éticos, legais e de biossegurança na aquisição e manipulação de dentes humanos (AU).


Thisstudy aimed toanalyze the profile of users of the Human Teeth Biobank at the Federal University of Paraná (HTB-UFPR), the most sought-after services, whether externally obtained teeth are used and the degree of user satisfaction. For this, a semi-structured electronic questionnaire was applied to the internal community of the Dentistry course at UFPR, between August and December 2019. A total of 300 questionnaires were answered, 263 by undergraduate students, 4 by graduate students, 24 by professors and 9 by technical-administrative employees. Most students were female between 17 and 22 years old, while for employees(teachers and technicians) there was a similar distribution between the sexes in the age group between 40 and 59 years old. Although 80.99% of the students claimed to know the HTB-UFPR, only 50.19% used its services and 59.32% reported having already looked for teeth externally. The most used service was the withdrawalfor teaching activities, but only 42.15% returned them after use. The teeth obtained externally came mainly from private offices and only 56.33% of the students reported having always submitted them to disinfection/sterilization, with the autoclave being the most indicated method. All employees knew the HTB-UFPR and, among the teachers, most made both withdrawaland donations. The main purpose of the withdrawals was the research and 63.6% reported having returned their teeth. As for satisfaction, the academic community was predominantly fully satisfied. Finally, it emphasizes the need to expand awareness actions for the academic community regarding ethical, legal and biosafety aspects in the acquisition and manipulation of human teeth (AU).


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Personal Satisfaction , Tooth/anatomy & histology , Containment of Biohazards/ethics , Education, Dental/methods , Ethics, Dental/education , Health Knowledge, Attitudes, Practice , Surveys and Questionnaires/statistics & numerical data , Data Interpretation, Statistical , Biological Specimen Banks/ethics
20.
Dent. press endod ; 11(3): 14-23, Sept-Dec.2021.
Article in English | LILACS | ID: biblio-1378576

ABSTRACT

A proposta da presente revisão de literatura foi estabelecer as evidências existentes sobre etiologia, sinais e sintomas, métodos de diagnóstico e tratamento de dentes gretados. Segundo a American Association of Endodontists (AAE), o termo dente gretado (DG) foi definido como uma fratura em um plano que quebra a continuidade do esmalte e da dentina, sem separação das partes, geralmente no sentido mesiodistal, passando pela superfície oclusal, podendo envolver uma ou ambas as cristas marginais. Essa fratura, por apresentar profundidade e direção desconhecidas, pode se estender até a polpa e/ou ligamento periodontal, levando a um quadro de pulpite reversível, pulpite irreversível, necrose pulpar ou, até mesmo, evoluir para uma fratura completa. Atualmente, os DGs estão relacionados à terceira maior causa de dentes perdidos, após cárie e doença periodontal. Estudos indicam uma falta de consenso entre profissionais sobre como tratar dentes gretados, uma questão clínica relevante, que precisa ser priorizada e esclarecida. Nesse contexto, essa revisão abordou a etiologia, sinais e sintomas, métodos de diagnósti- co e tratamento de dentes gretados (AU)


The purpose of this literature review is to examine the existing evidence regarding etiology, signs, symptoms, methods of diagnosis, and treatment of cracked teeth. According to the American Association of Endodontists (AAE), the term cracked tooth (CT) is defined as "a fracture in a plane that breaks the continuity of the enamel and dentin, without separation of the parts, usually in the mesiodistal direction, passing through the surface occlusal, which may involve one or both of the marginal ridges." Due to its unknown depth and direction, this fracture can extend to the pulp and periodontal ligament, leading to reversible pulpitis, irreversible pulpitis, pulp necrosis, or even progress to a complete fracture. Currently, cracked teeth are related to the third largest cause of missing teeth, after caries and periodontal disease. Studies indicate a lack of consensus among professionals about treating cracked teeth, a clinically relevant issue that needs to be prioritized and clarified. In this context, this review addressed the etiology, signs and symptoms, diagnostic methods, and treatment of cracked teeth (AU).


Subject(s)
Humans , Pulpitis , Dental Pulp Necrosis , Inlays , Specialization , Tooth
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