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1.
J Investig Clin Dent ; : e12455, 2019 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-31478355

RESUMO

To seek scientific evidence to support the effectiveness of invisible aligners, in the aesthetic and functional aspects, compared with that of conventional braces. An electronic search was performed with a complementary grey literature search for in vivo research. No language restrictions were applied. Scopus, PubMed, Web of Science, Cochrane, ClinicalTrials and GreyLiterature databases were used. Studies were first selected by title and abstract; those potentially eligible were read in full. Non-randomized studies were assessed for risk of bias using the tools Methodological Index for Non-randomized Studies (MINORS) and Cochrane Collaboration Common Scheme for Bias as a function of the presence of randomization. The search found 559 studies, of which 55 were potentially eligible. A total of 4 articles were included in this systematic literature review: three non-randomized controlled studies and one randomized controlled study, three with low risk of bias (RoB) and one with moderate RoB. Three studies showed time of correction of dental crowding shorter or equal to that of the control group and only one study showed less time of correction using conventional braces. Invisible aligners were deficient with respect to anterior/posterior and vertical corrections compared with fixed orthodontic appliances. Invisible aligners are effective in promoting dental alignment, but present clinical limitations in relation to the conventional system.

2.
Int. j. odontostomatol. (Print) ; 13(3): 292-298, set. 2019. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-1012425

RESUMO

ABSTRACT: This case describes the treatment of Class II malocclusion in a patient missing one of the maxillary central incisors due to traumatic impaction. The treatment approach consisted in the extraction of the remaining maxillary central incisor, followed by diastema closure and re-anatomization of lateral incisors into central incisors. The results obtained were considered satisfactory concerning occlusal, aesthetic and functional aspects. This therapeutic approach may be used as an alternative for similar cases.


RESUMEN: Este caso clínico describe el tratamiento de la mala oclusión de Clase II en un paciente con ausencia de uno de los incisivos centrales superiores debido a impactación. El abordaje del tratamiento consistió en la extracción de este elemento dental y del otro incisivo central, seguido del cierre de los diastemas y reanatomización de los incisivos laterales en incisivos centrales. Los resultados obtenidos fueron considerados satisfactorios con relación a los aspectos oclusales, estéticos y funcionales. Así, esta planificación se puede utilizar como una nueva alternativa de abordaje terapéutico para estos casos.

3.
Ciênc. Saúde Colet ; 24(8): 2909-2922, ago. 2019. tab, graf
Artigo em Português | LILACS-Express | ID: biblio-1011878

RESUMO

Resumo Trata-se de uma revisão sistemática e metanálise para estimar e comparar as prevalências de fluorose dental em localidades brasileiras abastecidas com água tratada sem suplementação de flúor e em localidades que utilizam de água de origem subterrânea. Em dezembro de 2016 foram buscados estudos transversais em 8 bases de dados incluindo a "literatura cinzenta". As prevalências foram estimadas utilizando modelo misto de efeitos aleatórios considerando as localidades como subgrupo. A heterogeneidade entre os estudos foi avaliada através da estatística I2 e do teste Q de Cochran. Foram encontrados 1.038 registros, dos quais apenas 18 artigos preencheram os critérios de inclusão, sendo submetidos para análise. O modelo metanalítico estimou em 8,92% (IC95%:5,41% até 14,36%) a prevalência de fluorose dental em municípios com água tratada sem suplementação de flúor e em 51,96% (IC95%: 31,03% até 72,22%) em municípios abastecidos por poços artesianos. A heterogeneidade entre os estudos foi alta, I2 = 95% (p < 0,01) no primeiro subgrupo de municípios e I2 = 98% (p < 0,01) no segundo subgrupo. A prevalência foi significativamente maior (p < 0,001) em populações expostas à água de poços artesianos, indicando que a presença de flúor natural em concentrações elevadas representa um fator de risco para a ocorrência de fluorose dental.


Abstract This systematic review and meta-analysis aimed to estimate and compare the prevalences of dental fluorosis in Brazilian cities supplied with non-fluoridated water and in locations that uses groundwater. In December of 2016, cross-sectional studies were searched in eight databases, including the "grey literature". The prevalences were estimated through a mixed random effects model considering the locations as subgroups. The heterogeneity among the studies was assessed with I2 statistics and the Cochran's Q test. A total of 1038 records were found, from which only 18 articles met the inclusion criteria and were subjected to analysis. The meta-analytic model estimated a prevalence of dental fluorosis of 8.92 % (95 % CI: 5.41 % to 14.36 %) in cities supplied with non-fluoridated water, and of 51.96 % (95 % CI: 31.03 % to 72.22 %) in cities supplied by artesian wells. The heterogeneity among the studies was high: I2 = 95 % (p < 0.01) in the first subgroup of cities and I2 = 98 % (p < 0.01) in the second subgroup. The prevalence was significantly higher (p < 0.001) in populations exposed to artesian well water, indicating that the presence of natural fluoride at high concentrations represents a risk factor for the occurrence of dental fluorosis.

4.
Cien Saude Colet ; 24(8): 2909-2922, 2019 Aug 05.
Artigo em Português, Inglês | MEDLINE | ID: mdl-31389538

RESUMO

This systematic review and meta-analysis aimed to estimate and compare the prevalences of dental fluorosis in Brazilian cities supplied with non-fluoridated water and in locations that uses groundwater. In December of 2016, cross-sectional studies were searched in eight databases, including the "grey literature". The prevalences were estimated through a mixed random effects model considering the locations as subgroups. The heterogeneity among the studies was assessed with I2 statistics and the Cochran's Q test. A total of 1038 records were found, from which only 18 articles met the inclusion criteria and were subjected to analysis. The meta-analytic model estimated a prevalence of dental fluorosis of 8.92 % (95 % CI: 5.41 % to 14.36 %) in cities supplied with non-fluoridated water, and of 51.96 % (95 % CI: 31.03 % to 72.22 %) in cities supplied by artesian wells. The heterogeneity among the studies was high: I2 = 95 % (p < 0.01) in the first subgroup of cities and I2 = 98 % (p < 0.01) in the second subgroup. The prevalence was significantly higher (p < 0.001) in populations exposed to artesian well water, indicating that the presence of natural fluoride at high concentrations represents a risk factor for the occurrence of dental fluorosis.

6.
Eur J Dent Educ ; 2019 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-31274215

RESUMO

Violence against women is a hot topic in the spotlight of contemporary science. In the academy, most of the courses are structured in a hierarchical system, in which students-especially female-become potentially vulnerable to emotional, physical and even sexual harm. This study aimed to describe the prevalence and the study-associated factors of emotional, physical and sexual violence against female students in medical, dental and psychological courses in South Brazil. A questionnaire-based survey was performed combining two previously validated tools for the investigation of workplace violence. The questionnaires were digitally provided to women undergoing medicine, dentistry and psychology courses in South Brazil. The study was conducted between April and July, 2018. The final sample consisted of 241 students (57 medical students; 91 dental students and 93 psychology students). Reports of general violence reached a prevalence rate of 45.2%. In particular, emotional violence reached 78.9% of the cases, whilst physical and sexual violence reached 4.6% and 8.3%, respectively. Amongst the identified offenders, professors figured as the most prevalent (18.4%). Alarming rates of violence against women were detected in this study. Institutional preventive strategies must be designed to protect female students in their study/workplace and enable a safe routine of academic activities.

7.
J Contemp Dent Pract ; 20(5): 548-551, 2019 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-31316015

RESUMO

AIM: The aim of this study is to evaluate the potential of deoxyribonucleic acid (DNA) recovery from bite marks in foods, in different collection types, from DNA quantification. MATERIALS AND METHODS: The sample consisted of 80 swabs, obtained from 20 cheese pieces, bitten by the same person, using the double-swab technique in the center and the periphery of the bite. A statistical analysis was carried out using Statistical Package for the Social Sciences (SPSS) statistical software version 20.0, with values of p < 0.05 being considered statistically significant. RESULTS: The DNA was recovered in all cheese pieces, regardless of the collection types and the bite region. However, the comparative analysis of DNA recovery potential in the four swabs allowed us to infer that the collections in the central region of the bite (DC and WC) were the ones that presented better precision, in addition to extracting a higher DNA concentration, the dry swab being in the center of the bite which presented better results. CONCLUSION: The results proved the effectiveness of the double-swab technique for collecting genetic materials in bite marks; however, in the food used, a single collection at the center of the bite would be enough, optimizing the resources and time needed for the analysis. CLINICAL SIGNIFICANCE: Due to the difficulties of physically comparing a site of a skin lesion and the dental arches of the suspect, the evidence of DNA in saliva has been used to indicate the perpetrator of the bite. In addition, the collection, preservation, and isolation of saliva DNA can be done at low cost and provide flexibility for clinical and laboratory workflow.

8.
Spec Care Dentist ; 39(5): 464-470, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31329315

RESUMO

AIMS: This study aimed to investigate the morphology of the palate, palatal rugae pattern, and dental arch form in patients with schizophrenia. METHODS AND RESULTS: An observational case-control study was designed following the STROBE statement and checklist. The sample consisted of 132 patients (39 diagnosed with schizophrenia and 93 controls). Dental casts of the patients were classified based on the pattern of their palatal rugae, their dental arch form, and the area of their palate. The palatal rugae in patients with schizophrenia had a more random distribution and shape compared to the control group (P = .027). Oval dental arches were the most prevalent in both groups (P = .473). The palate area was slightly larger in the control group (3.2318 ± 0.549 mm2 ) compared with the group of patients with schizophrenia (3.060 ± 0.470 mm2 ) (P = .090). CONCLUSION: Palatal rugae pattern may feature as a potential minor physical anomaly for schizophrenia. Additional studies with alternative sampling and classification systems are necessary to understand this finding and its applications in practice.

9.
Int. j. odontostomatol. (Print) ; 13(2): 172-179, jun. 2019. tab
Artigo em Inglês | LILACS-Express | ID: biblio-1002301

RESUMO

ABSTRACT: Childhood is a period of life when the human being is constantly going through progressive steps of psychosocial, physical, and mental development. The quality of hygiene habits of family members will be reflected on the characteristics and attitudes of children, which significantly increases the responsibility of the family in oral hygiene education. The present study aimed to observe the influence of maternal satisfaction with the dentist in children's oral care. This is a cross-sectional design, which sample included 100 mothers from a city in Southern Brazil. From a questionnaire prepared for this purpose and adapted from previous research, the mothers were interviewed from January to July 2015. The results presented showed that most mothers work outside the home (46.4 %) but monitor their children during toothbrushing (50.7 %). For most mothers, the dentist represents satisfaction (37.1 %) and the main reason for seeking the dentist is oral health (44.3 %). It was found that mothers who encourage their children to use dental floss and monitor them during toothbrushing are the mothers who feel satisfied with the dentist (P < 0.05). In addition, mothers know that caries is a disease and its occurrence is related to diet habits, however, they add chocolate milk and sugar to their children's bottle. Thus, it was concluded that satisfaction with the dentist influences mothers on oral hygiene habits adopted by their children regarding the use of dental floss and toothbrushing monitoring.


RESUMEN: La infancia es un período de la vida en que el ser humano está en constante y progresivo desarrollo psicológico, físico y mental. La calidad de la higiene oral de otros miembros de la familia se va a reflejar directamente en las características y actitudes de los niños, aumentando significativamente la responsabilidad de la familia en la educación sobre higiene oral. El presente trabajo tuvo como objetivo observar la influencia que tiene la satisfacción de la madre con el cirujano dentista respecto a las acciones de la salud oral de los niños. Se trató de un estudio de tipo transversal, cuya muestra no probabilística contó con 100 madres de una ciudad del Sur de Brasil. A partir de un cuestionario elaborado para este fin y adaptado de investigaciones anteriores, las madres fueron entrevistadas en el período de enero a julio de 2015. Los resultados mostraron que la mayoría de las madres trabajaban fuera de la casa (46,4 %), pero acompañaban a su hijo durante el cepillado (50,7 %). La mayoría de ellas estaba conforme con la atención del cirujano dentista (37,1 %) y el mayor motivo de su búsqueda fue la salud oral (44,3 %). Se verificó que las madres que incentivaban el uso del hilo dental por parte de los hijos y que realizaban el acompañamiento durante el cepillado eran las madres que se sentían conformes con la atención del cirujano dentista (p<0,05). Además de esto, las madres saben que la caries es una enfermedad y que su surgimiento tiene relación con la alimentación, pero igualmente le incorporaban cacao en polvo y azúcar a la mamadera de sus hijos. De esta manera, fue posible concluir que, la satisfacción con la atención del cirujano dentista influye a las madres en los hábitos de higiene oral adoptados por sus hijos, en lo relativo al uso del hilo dental y el cepillado dental.

10.
Oral Maxillofac Surg ; 2019 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-31187286

RESUMO

PURPOSE: This study aimed to compare the aesthetic perception and treatment need in individuals of different ethnicities with various degrees of laterognathism assessed by orthodontists, oral and maxillofacial surgeons, and laypersons. METHODS: Three male descendants of different ethnicities were assessed, in which the mandibular deviation was manipulated digitally in different angulations (from 0 to 8°). The assessment was performed by three groups (orthodontists, maxillofacial surgeons, and laypersons (n = 20)), and it consisted of scoring the degree of pleasantness of the images presented in a numerical scale and indicating or not a corrective treatment for the respective image. RESULTS: The higher the degree of deviation, the lower the scores assigned to the image (p < 0.05). Laypersons assigned the highest scores, with a significant difference between laypersons and oral and maxillofacial surgeons (p < 0.05). In terms of treatment need according to the group of evaluators, there were no statistically significant differences among them (p > 0.05). Moreover, the increase in degree of deviation increased the perception of treatment need (p < 0.05). The African faces received the highest scores, with significant differences from the Caucasian faces (p < 0.05). The overall tendency was higher treatment indication for the Caucasian faces, with statistically significant differences from the African faces (p < 0.05). CONCLUSION: The greater the mandibular deviation, the lower the aesthetic pleasantness. Laypersons are less critical regarding the assessment of mandibular deviation. There was no difference for treatment indication by the different groups of evaluators. In addition, ethnicity may influence the perception and treatment indication.

12.
Int J Surg Case Rep ; 57: 197-200, 2019 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-30981981

RESUMO

INTRODUCTION: The calcifying epithelial odontogenic tumor (CEOT), also known as Pindborg tumor, is a locally invasive benign neoplasm. Histogenesis is controversial. PRESENTATION OF CASE: A 26-year-old male presented asymptomatic swelling on the right side of the face, with approximately six months of evolution. At intraoral examination, a hard nodule localized in the right posterior region of the maxilla, measuring approximately 5.0 x 3.0 cm was observed. The computed tomography images showed hypodense lesion with points of calcification associated with two non-erupted teeth. We suspect of odontogenic lesions. The final diagnosis of CEOT was established based on the histopathological aspects. DISCUSSION: This tumor is more frequent in adult men, usually develops in the posterior region of the mandible and may present clinical-pathological similarities with others odontogenic lesions. The radiological aspects observed in the CEOT are variable and depend on the time of evolution of the tumor. The histopathological examination is mandatory to establish the final diagnosis. CONCLUSION: Our case was treated with simple enucleation without signs of recurrence in five years of follow-up. Further studies are needed to understand the aetiology and the biological behaviour of this tumor.

13.
Rev. bras. crescimento desenvolv. hum ; 29(1): 93-101, Apr. 2019. tab
Artigo em Inglês | LILACS-Express | ID: biblio-1013524

RESUMO

INTRODUCTION: Normal cells are also affected during antineoplastic treatment, including oral mucosa cells, which potentially causes oral complications. OBJECTIVE: This study aimed to assess the prevalence of the main oral complications and the oral hygiene index in children and adolescents aged 5 to 12 years, who received chemotherapy and/or radiotherapy. METHODS: It is an observational prevalence study performed in a hospital in Southern Brazil. Data were collected from 21 hospitalized patients with a self-application questionnaire for the responsible persons of children and with an intraoral clinical examination. The indicators used were DMFT (decayed, missing, and filled teeth) for dental caries, SOHI (simplified oral hygiene index) for oral hygiene, and the presence of mucositis, xerostomia, and candidiasis. RESULTS: Most of the sample was male (57.1%) with average age of 8 years (sd 2.92), diagnosed with leukemia (47.6%). All patients received chemotherapy as treatment of choice and 38.1% received radiotherapy as part of the treatment. The results showed the presence of 61.9% of mucositis in patients and 28.6% of xerostomia. No patient presented candidiasis during clinical examination. As for dental caries, 66.7% of patients showed a DMFT from 4 to 16, which is considered high, and 38.1% of patients showed the presence of bacterial plaque and dental calculus. CONCLUSION: It is concluded that the main oral complications in children during antineoplastic treatment were mucositis and xerostomia. It was observed a high rate of dental caries as a consequence of an inadequated oral hygiene.


INTRODUÇÃO: Durante o tratamento antineoplásico, células normais também são afetadas, incluindo assim, as células da mucosa oral, o que potencialmente causa complicações orais. OBJETIVO: O presente trabalho teve por objetivo avaliar a prevalência das principais complicações bucais e índice de higiene oral em crianças e adolescentes submetidas à quimioterapia e/ou radioterapia. MÉTODO: O delineamento é do tipo observacional de prevalência realizado em um Hospital do Sul do Brasil. Foram coletados dados de 21 pacientes de 5 a 12 anos de idade em tratamento, a partir de um questionário auto aplicativo para os responsáveis pelos pacientes e um exame clínico intraoral. Os indicadores utilizados foram o índice CPOD (dentes cariados, perdidos e obturados) para cárie dentária, o índice IHOS (higiene oral simplificada) para Higiene Oral e a presença de mucosite, xerostomia e candidíase. RESULTADOS: A maior parte da amostra era do sexo masculino (57,1%) média de 8 anos de idade (dp 2,92), diagnosticados com leucemia (47,6%). Todos os participantes receberam quimioterapia como tratamento de escolha e 38,1% receberam radioterapia como parte do tratamento. Os resultados evidenciariam presença de mucosite em 61,9% e xerostomia em 28,6% dos pacientes. Nenhum paciente apresentou candidíase durante o exame clínico. Quanto a cárie dentária, 66,7% tem um CPOD de 4 e 16, considerado alto e 38,1% dos pacientes apresentaram presença de placa bacteriana e cálculo dentário. CONCLUSÃO: As principais complicações bucais evidenciadas durante o tratamento antineoplásico foram mucosite e xerostomia. Foi observado também um alto índice de cárie dentária, consequência de uma inadequada higiene oral.

14.
Clinics (Sao Paulo) ; 74: e852, 2019 03 25.
Artigo em Inglês | MEDLINE | ID: mdl-30916212

RESUMO

OBJECTIVES: To evaluate and compare the magnitude and distribution of stresses generated on implants, abutments and first molar metal-ceramic crowns using finite element analysis. METHODS: Preliminary three-dimensional models were created using the computer-aided design software SolidWorks. Stress and strain values were observed for two distinct virtual models: model 1 - Morse taper and solid abutment; model 2 - Morse taper and abutment with screw. A load (250 N) was applied to a single point of the occlusal surface at 15° to the implant long axis. Von Mises stresses were recorded for both groups at four main points: 1) abutment-retaining screws; 2) abutment neck; 3) cervical bone area; 4) implant neck. RESULTS AND CONCLUSION: Model 1 showed a higher stress value (1477.5 MPa) at the abutment-retaining screw area than the stresses found in model 2 (1091.1 MPa for the same area). The cervical bone strain values did not exceed 105 µm for either model.


Assuntos
Projeto do Implante Dentário-Pivô/instrumentação , Implantes Dentários , Planejamento de Prótese Dentária/instrumentação , Análise do Estresse Dentário , Análise de Elementos Finitos , Projeto Auxiliado por Computador , Coroas , Projeto do Implante Dentário-Pivô/métodos , Planejamento de Prótese Dentária/métodos , Módulo de Elasticidade , Humanos , Mandíbula/diagnóstico por imagem , Modelos Anatômicos , Estresse Mecânico
15.
Braz Oral Res ; 33: e014, 2019 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-30892410

RESUMO

Satisfaction with dental aesthetics is a subjective indicator used in epidemiological studies and is related to health behaviours. Little is known about the factors that influence this indicator, particularly among adolescents who live in a situation of social vulnerability. The aim of this study was to investigate the relationship between malocclusion and dental appearance in underprivileged Brazilian adolescents. This analytical cross-sectional study was conducted in Piracicaba, Brazil, and evaluated 884 adolescents from 13 to 19 years of age. The dependent variable was satisfaction with dental appearance, and the independent variables were classified as individual (components of the Dental Aesthetic Index - DAI, sex and age) and contextual (social exclusion index). For statistical analysis, multilevel regression models were estimated. The individual variables were considered Level 1, and the contextual variable was considered Level 2, with a level of significance of 5%. The mean age of the adolescents was 15.3 years. Female adolescents more frequently affirmed that they were satisfied with their dental appearance than did male individuals. There was an increase in dissatisfaction with oral health with the increase in anterior maxillary overjet, midline diastema, larger anterior irregularity in the maxilla, larger anterior irregularity in the mandible, anterior open bite and antero-posterior molar relation. Satisfaction with dental appearance was associated with individual factors such as sex and DAI components.


Assuntos
Estética Dentária/psicologia , Má Oclusão/psicologia , Autoimagem , Adolescente , Estudos Transversais , Feminino , Humanos , Masculino , Satisfação do Paciente , Fatores Sexuais , Fatores Socioeconômicos , Inquéritos e Questionários , Adulto Jovem
16.
Arch Oral Biol ; 97: 25-34, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30336379

RESUMO

OBJECTIVE: This study aimed to assess the validity of palatal rugoscopy for sexual dimorphism in the casework routine of forensic dentistry. DESIGN: A systematic literature reviews was established following the Preferred Reporting Items for Systematic reviews and Meta-analyses (PRISMA) and Cochrane guidelines. Six electronic databases were searched as the primary source of information. "Grey literature" was included to avoid selection and publication bias. As a secondary source of information, the reference lists of the eligible studies were also consulted to increase the search spectrum. Methodological quality and risk of bias were assessed with Joanna Briggs Institute Critical Appraisal Tools for Systematic Reviews. Statistic tests, namely the meta-analysis of diagnostic accuracy, Cochran Q test, and I2 test, were performed to verify the heterogeneity between the eligible studies. RESULTS: The systematic search resulted in 263 studies, out of each 8 fulfilled the inclusion criteria. An additional eligible article was included after the search in reference lists. From the 9 studies that underwent qualitative data extraction, six were selected for quantitative analysis. The meta-analysis of grouped sex estimates showed sensitivity and specificity rates of 89% and 83%, respectively. The Area Under the Curve reached 0.93. High heterogeneity and important methodological limitations were detected among the studies. CONCLUSION: Palatal rugoscopy seems to have discriminant power for sexual dimorphism. However, the limitations found specifically in each study and the strong heterogeneity across studies suggest that palatal rugoscopy lacks evidence-based confirmation for reliable application as a sole tool for sexual dimorphism in practice.


Assuntos
Odontologia Legal/métodos , Palato Duro/anatomia & histologia , Caracteres Sexuais , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes
17.
Braz. oral res. (Online) ; 33: e014, 2019. tab
Artigo em Inglês | LILACS-Express | ID: biblio-989469

RESUMO

Abstract Satisfaction with dental aesthetics is a subjective indicator used in epidemiological studies and is related to health behaviours. Little is known about the factors that influence this indicator, particularly among adolescents who live in a situation of social vulnerability. The aim of this study was to investigate the relationship between malocclusion and dental appearance in underprivileged Brazilian adolescents. This analytical cross-sectional study was conducted in Piracicaba, Brazil, and evaluated 884 adolescents from 13 to 19 years of age. The dependent variable was satisfaction with dental appearance, and the independent variables were classified as individual (components of the Dental Aesthetic Index - DAI, sex and age) and contextual (social exclusion index). For statistical analysis, multilevel regression models were estimated. The individual variables were considered Level 1, and the contextual variable was considered Level 2, with a level of significance of 5%. The mean age of the adolescents was 15.3 years. Female adolescents more frequently affirmed that they were satisfied with their dental appearance than did male individuals. There was an increase in dissatisfaction with oral health with the increase in anterior maxillary overjet, midline diastema, larger anterior irregularity in the maxilla, larger anterior irregularity in the mandible, anterior open bite and antero-posterior molar relation. Satisfaction with dental appearance was associated with individual factors such as sex and DAI components.

18.
Clinics ; 74: e852, 2019. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-989639

RESUMO

OBJECTIVES: To evaluate and compare the magnitude and distribution of stresses generated on implants, abutments and first molar metal-ceramic crowns using finite element analysis. METHODS: Preliminary three-dimensional models were created using the computer-aided design software SolidWorks. Stress and strain values were observed for two distinct virtual models: model 1 - Morse taper and solid abutment; model 2 - Morse taper and abutment with screw. A load (250 N) was applied to a single point of the occlusal surface at 15° to the implant long axis. Von Mises stresses were recorded for both groups at four main points: 1) abutment-retaining screws; 2) abutment neck; 3) cervical bone area; 4) implant neck. RESULTS AND CONCLUSION: Model 1 showed a higher stress value (1477.5 MPa) at the abutment-retaining screw area than the stresses found in model 2 (1091.1 MPa for the same area). The cervical bone strain values did not exceed 105 µm for either model.

20.
PLoS One ; 13(12): e0208900, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30557311

RESUMO

OBJECTIVE: This study aimed to verify whether the saddle seat provides lower ergonomic risk than conventional seats in dentistry. METHODS: This review followed the PRISMA statement and a protocol was created and registered in PROSPERO (CRD42017074918). Six electronic databases were searched as primary study sources. The "grey literature" was included to prevent selection and publication biases. The risk of bias among the studies included was assessed with the Joanna Briggs Institute Critical Appraisal Tool for Systematic Reviews. Meta-analysis was performed to estimate the effect of seat type on the ergonomic risk score in dentistry. The heterogeneity among studies was assessed using I2 statistics. RESULTS: The search resulted in 3147 records, from which two were considered eligible for this review. Both studies were conducted with a total of 150 second-year dental students who were starting their laboratory activities using phantom heads. Saddle seats were associated with a significantly lower ergonomic risk than conventional seats [right side (mean difference = -3.18; 95% CI = -4.96, -1.40; p < 0.001) and left side (mean difference = -3.12; 95% CI = -4.56, -1.68; p < 0.001)], indicating posture improvement. CONCLUSION: The two eligible studies for this review provide moderate evidence that saddle seats provided lower ergonomic risk than conventional seats in the examined population of dental students.


Assuntos
Equipamentos Odontológicos/efeitos adversos , Desenho de Equipamento/efeitos adversos , Ergonomia , Doenças Profissionais/etiologia , Postura , Odontologia , Humanos
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