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ABSTRACT: This study aims to evaluate the physical, chemical, mechanical and optical properties of Bulk-Fill resin, in relation to the literature and its proper clinical uses. A bibliographic search was performed in the main health databases PUBMED (www.pubmed.gov) and Scholar Google (www.scholar.google.com.br), in which articles published from 1994 to 2020 were collected. Laboratory studies, case reports, systematic reviews and literature reviews, which were developed in living individuals, were included. Therefore, articles that did not deal with the characteristics of the Bulk-Fill resin and its proper clinical uses were excluded. The use of Bulk-Fill resin has been progressively increasing over the years, presenting good properties, achieving success in clinical performance, ease of handling and thus has become the material of choice for dentists. In addition, its longevity demonstrates durability with mechanical properties and resistance to tooth structure. Bulk - Fill resins have characteristics similar to traditional composite resins, when performed according the usage protocol. With the use of this group of resins in a single increment, possible failures that occur during the restorative procedure can be minimized, such as: less chance of incorporating bubbles and a volumetric contraction with less stress on the interface.
RESUMEN: Este estudio tuvo como objetivo evaluar las propiedades físicas, químicas, mecánicas y ópticas de la resina Bulk-Fill, en relación con la literatura y sus usos clínicos apropiados. Realizamos una búsqueda bibliográfica en las bases de datos de salud PUBMED (www.pubmed.gov) y Scholar Google (www.scholar.google.com.br), en la que se recopilaron trabajos que se publicaron entre 1994 y 2020. Fueron incluidos estudios de laboratorio, informes de casos, revisiones sistemáticas y revisiones de literatura, desarrollados en individuos vivos. Por tanto, se excluyeron los artículos que no trataban las características de la resina Bulk-Fill y sus usos clínicos adecuados. El uso de la resina Bulk-Fill ha ido aumentando progresivamente a lo largo de los años, presentando buenas propiedades, logrando éxito en el rendimiento clínico, facilidad de manejo y, por lo tanto, se ha convertido en el material elegido por los dentistas. Además, su longevidad demuestra durabilidad, con propiedades mecánicas y resistencia a la estructura dental.Las resinas Bulk-Fill tienen características similares a las resinas compuestas tradicionales, cuando se realizan siguiendo el protocolo de uso. Con el uso de este grupo de resinas mono incremental, es posible eliminar el paso de varios incrementos, disminuyendo a su vez el tiempo clínico. Además, se pueden minimizar las posibles fallas que se producen durante el procedimiento de restauración, tales como: menos posibilidades de incorporar burbujas y una contracción volumétrica con menos estrés en la interfaz.
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ABSTRACT: To evaluate Knoop microhardness and diametral compression strength at different polymerization times. A total of 80 cylindrical samples with Filtek resin™ One Bulk Fill were made to perform the in vitro study, using half of total samples (n=40) for each test and divided equally between groups (n=10). All samples were made according to ISO 4049 using 2 mm thickness Teflon matrix and a central orifice with 4 mm diameter. Four different times of light-curing in Standard mode suggested by the light-unit manufacturer were selected, therefore, group 1 samples (G1) were light-cured for 5 seconds; group 2 (G2) for 10 seconds; group 3 (G3) for 15 seconds, and group 4 (G4) for 20 seconds. A radiant display, which means a power in mW/cm2 by time in seconds was expressed in Joules (J). The samples were stored in a dark container with distilled water at a temperature of 37°C for 48 hours before testing. One-way analysis of variance (ANOVA) with T-Test (LSD) of multiple comparisons of the mean values of Knoop hardness and diametral compression strength was performed, with significance index α=0.05. Regarding the Knoop microhardness test, G1 (35.73 ± 6.2) presented the lowest values, followed by G2, while G3 and G4 did not present statistical differences between them. For the diametral compression test, G1 (1387.76 ± 190.51) obtained the lowest value when compared to the other groups. G2, G3, and G4 did not present significant statistical differences. The different polymerization times influenced the Knoop microhardness and the diametral compression strength of Bulk Fill resin.
RESUMEN: El objetivo de este trabajo fue evaluar la microdureza Knoop y la resistencia a la compresión diametral en diferentes tiempos de polimerización. En el estudio realizado in vitro, se analizó un total de 80 muestras cilíndricas con la resina Filtek™ One Bulk Fill, utilizando la mitad (n=40) para cada prueba realizada y dividida en partes iguales entre los grupos (n=10). Todas las muestras se tomaron de acuerdo con ISO 4049 utilizando matrices de teflón de 2 mm de espesor y orificio central con 4 mm de diámetro. Se seleccionó cuatro veces el fotocurado de manera estándar, sugerido por el fabricante. Por lo tanto, las muestras del grupo 1 (G1) se fotopolimerizaron durante 5 segundos; grupo 2 (G2) durante 10 segundos; grupo 3 (G3) durante 15 segundos y grupo 4 (G4) durante 20 segundos. La exposición radiante, que indica la potencia en mW / cm2 a lo largo del tiempo en segundos, se expresó en julios (J). Las muestras se almacenaron en un recipiente oscuro con agua destilada en una estufa a una temperatura de 37°C durante 48 horas antes del ensayo. Se realizó para comparaciones múltiples de los valores medios, análisis de varianza (ANOVA) de un criterio con la prueba T (LSD) tanto de la dureza de Knoop como de la compresión diametral con un índice de significación α=0.05. Con respecto a la prueba de microdureza de Knoop, G1 (35,73 ± 6,2) tuvo los valores más bajos, seguido de G2, mientras que G3 y G4 no mostraron diferencias estadísticas entre ellos. Para la prueba de compresión diametral, G1 (1387.76 ± 190.51) obtuvo el valor más bajo en comparación con los otros grupos. G2, G3 y G4 no presentaron diferencias estadísticamente significativas. Los diferentes tiempos de polimerización influyeron en la microdureza de Knoop y la resistencia a la compresión diametral de la resina compuesta mono incremental.
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ABSTRACT: The present study aims to describe, through a case report, the functioning of bone grafts, where they are obtained including bone banks and the different dental areas in which it is used. A 50-year.old female patient HMR, sought the postgraduate college of dentistry CECAPE for oral rehabilitation. The initial clinical examination revealed the absence of several dental elements in both the maxilla and mandi ble, bone resorption in the entire maxillary extension where there was an absence of elements in the anterior region and the presence of a torus in the palatal region. Initial tomographic examinations of the maxilla and mandible were performed, looking for the best conduct regarding the diagnosis and planning of the case. After the clinical and radiographic examinations was performed, and the diagnosis was reached, it was determined as a treatment for oral rehabilitation of the maxilla, bone grafting and an Implant-supported Removable Partial Prosthesis and for the mandible a Dento-muco-supported Removable Partial Prosthesis. Dental treatments and oral rehabilitation from the use of bone tissues and bone grafting have become commonly used. Procedures that would normally lead to failure started to increase the percentage of successes due to the use of these biomaterials. The use of bone grafts in dentistry has been shown to be a very effective and useful resource, considering its great applicability in bone reconstructions in different areas of dentistry.
RESUMEN: El presente estudio tiene como objetivo describir a través de un informe de caso, el funcionamiento de los injertos óseos, donde se obtienen, incluidos los bancos de huesos y las diferentes áreas dentales en las que se emplea. Una paciente HMR, de 50 años de edad, asistió el centro universitario de posgrado CECAPE para rehabilitación oral. El examen clínico inicial reveló la ausencia de varios dientes tanto en el maxilar como en la mandíbula, la resorción ósea en toda la extensión maxilar donde había ausencia de dientes en la región anterior y la presencia de un torus en la región palatina. Se realizaron exámenes tomográficos iniciales del maxilar y mandíbula, buscando la mejor conducta con respecto al diagnóstico y la planificación del caso. Después de los exámenes clínicos y radiográficos realizados y el diagnóstico listo, se determinó como un tratamiento para la rehabilitación oral del maxilar, el injerto óseo y una prótesis removible implantosoportada y para la mandíbula una prótesis parcial removible dento-muco-soportada. Los tratamientos dentales y la rehabilitación oral a partir del uso de tejidos óseos y el injerto óseo se han utilizado comúnmente. Los procedimientos que normalmente conducirían al fracaso comenzaron a aumentar el porcentaje de éxitos debido al uso de estos biomateriales. Se ha demostrado que el uso de injertos óseos en odontología es un recurso muy eficaz y útil, considerando su gran aplicabilidad en las reconstrucciones óseas en diferentes áreas de la odontología.
Subject(s)
Humans , Female , Middle Aged , Bone Transplantation/methods , Dental Implantation, Endosseous/methods , Bone-Implant Interface/diagnostic imaging , Tomography, X-Ray Computed , Mandible/diagnostic imaging , Mouth RehabilitationABSTRACT
ABSTRACT: The aim of this study was to carry out a literature review on the accuracy of conventional and digital dental impression methods, as well as present the various three-dimensional intraoral scanning systems. A bibliographic search was carried out in PUBMED's main health database, in which works published between 2008 and 2018 were collected. Laboratory studies, case reports and systematic reviews were included, addressing topics that deal with conventional digital materials, impression and precision. Articles that did not evaluate impression materials, their behavior and techniques to obtain a good impression of oral structures were excluded. Through a review in the literature, obtained the following findings: the most critical stage in macking a dental prothesis is to take the dental impression. The conventional technique of impression consists of obtaining a negative copy of the intra-oral situation that will be poured into gypsum, obtaining a positive copy, on which the work will be carried out. Digital scanning systems were not superior to conventional moldings when comparing fidelity, accuracy and detail reproduction; in contrast, they were superior to conventional impression when considering clinical chair time, patient and operator preference, and patient comfort.
RESUMEN: El objetivo de este estudio consistió en realizar una revisión bibliográfica sobre la precisión de los métodos de moldeo dental convencionales y digitales, así como presentar los diversos sistemas de escaneo intraoral tridimensionales. Se realizó una búsqueda bibliográfica en la base de datos de salud principal de PUBMED en la cual se recopilaron trabajos publicados entre 2008 y 2018. Se incluyeron estudios de laboratorio, informes de casos y revisiones sistemáticas, abordando temas que tratan con materiales digitales convencionales, moldeo y precisión. Se excluyeron los artículos que no evaluaron los materiales de moldeo, su comportamiento y técnicas para obtener una buena impresión de las estructuras orales. A través de una revisión exhaustiva en la literatura, obtuvimos los siguientes hallazgos: el paso más crítico en la preparación de una pieza protésica es la impresión de la preparación. La técnica convencional de moldeo consiste en obtener una copia negativa de la situación intraoral que se verterá en el yeso, obteniendo una copia positiva, sobre la cual se realizará el trabajo. Resulta que los sistemas de escaneo digital no fueron superiores a las molduras convencionales al comparar la fidelidad, precisión y reproducción de detalles; en cambio, fueron superiores a las molduras convencionales al considerar el tiempo de trabajo clínico, la preferencia del paciente y del operador y la comodidad del paciente.
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Humans , Dental Impression Technique/classification , Dental Impression Technique/instrumentation , Dental Impression Materials/chemistry , Dental Prosthesis Design , Printing, Three-DimensionalABSTRACT
ABSTRACT: The aim of this research is to compare the fluorescence of different trademarks of composite resins under ultraviolet light, indicating through the optical characteristics the restorative materials that best mimic the properties of dental fluorescence. In this study, nine composite resin trademarks of EA2 color were evaluated, and ten test samples were prepared for each material, totalizing ninety specimens. The specimens were produced from a bipartite aluminium matrix (10x2 mm), and then stored for 24 h in tubes of radiographic films, immersed in distilled water and after 48 h it were polished. A blind-type study (four evaluators) was used and the samples were analyzed in a dark wooden chamber where it was coupled two black lamps. In the data collection phase, the Kolmogorov-Smirnov normality test, ANOVA and Post Hoc of Tukey were used (adopting a significance level of 0.05). It was noted that the composite resin of the trademark Ultrafill was more fluorescent and Luna was statistically less fluorescent than all other materials, while Opallis and Tetric were superior to Glacier. There was no significant statistical difference among the composite resins Premissa, Point 4, Llis and Premium.
RESUMEN: El objetivo de esta investigación es comparar la fluorescencia de diferentes marcas registradas de resinas compuestas bajo luz ultravioleta, indicando a través de las características ópticas los materiales de restauración que mejor imitan las propiedades de la fluorescencia dental. En este estudio, se evaluaron nueve marcas registradas de resina de color EA2, y se prepararon diez muestras de prueba para cada material, totalizando noventa especímenes. Las muestras se produjeron a partir de una matriz de aluminio bipartita (10x2 mm), y luego se almacenaron durante 24 h en tubos de películas radiográficas, se sumergieron en agua destilada y después de 48 h se pulieron. Se utilizó un estudio de tipo ciego (cuatro evaluadores) y las muestras se analizaron en una cámara de madera oscura donde se acoplaron dos lámparas negras. En la fase de recolección de datos, se utilizaron las pruebas de normalidad KolmogorovSmirnov, ANOVA y Post Hoc de Tukey (adoptaron un nivel de significancia de 0,05). Se observó que la resina compuesta de la marca registrada Ultrafill era más fluorescente y la marca Luna fue estadísticamente menos fluorescente que todos los demás materiales, mientras que Opallis y Tetric eran superiores a Glacier. No hubo diferencias estadísticamente significativas entre las resinas compuestas Premissa, Point 4, Llis y Premium.
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Humans , Dentin-Bonding Agents , Dental Marginal Adaptation , Composite Resins , Resin Cements , Microscopy, Fluorescence , Ultraviolet Rays , Analysis of Variance , Esthetics, DentalABSTRACT
O objetivo desse estudo foi demonstrar novas modalidades de tratamento e a atualização de condutas de diagnóstico clínico e laboratorial da doença periodontal. Em um período de seis meses, esse estudo acompanhou a condição periodontal de um paciente do sexo masculino, com 35 anos de idade, na tentativa de associar a condição sistêmica do mesmo com os fatores modifi cadores e de risco das doenças periodontais, levando em consideração a perda de inserção e a ausência de profundidades de sondagem significativas, por meio de um relato de caso. O álcool e a nicotina modulam as funções imunológicas do hospedeiro (o uso crônico ou agudo esporádico de álcool pode estar ligado à combinação da diminuição da resposta inflamatória), diminuindo as funções dos neutrófi los, monócitos e, consequentemente, reduzindo a resposta imune. O alcoolismo e o tabaco estão associados à gravidade da doença periodontal, porém, com uma terapia de suporte e manutenção adequada, pode-se reduzir ou até mesmo impedir a progressão da doença, preservando assim parâmetros clínicos compatíveis com a saúde periodontal. Além disso, os resultados mostram que o paciente necessita de um acompanhamento contínuo, podendo ter recaídas no controle da relação doença periodontal, alcoolismo e tabaco.
The objective of this study was to demonstrate new treatment modalities and to update the clinical and laboratory diagnosis of periodontal disease. In a six-month period, this study followed the periodontal condition of a 35-year-old male patient in an attempt to associate his systemic condition with the modifying and risk factors of periodontal diseases, taking into account the loss of insertion and absence of signifi cant probing depths, by means of a case report. Alcohol and nicotine modulate the host's immune functions (chronic or acute sporadic use of alcohol may be linked to a combination of decreased infl ammatory response), decreasing the function of neutrophils, monocytes, and consequently reducing the immune response. Alcoholism and tobacco are associated with the severity of periodontal disease, but with adequate supportive and maintenance therapy, disease progression can be reduced or even prevented, thus preserving clinical parameters consistent with periodontal health. In addition, the results show that the patient needs continuous follow-up, and may have recurrences in the control of periodontal disease, alcoholism and tobacco control. Key words:
Subject(s)
Humans , Male , Adult , Alcoholism/complications , Periodontal Diseases/diagnosis , Periodontal Diseases/etiology , Periodontal Diseases/immunology , Periodontal Diseases/therapy , Tobacco Use Disorder/complicationsABSTRACT
Pilares angulados frente a fatores biomecânicos adversos, como assentamento não passivo, presença de fenda (gap) e sobrecarga oclusal, podem ter longevidade diminuída devido à falha de componentes, como afrouxamento, soltura e fratura de parafusos. Este trabalho teve como objetivo avaliar à resistência mecânica dos parafusos dos pilares angulados de 25º, com alturas de cinta de 2 mm e 4 mm, submetidos a carregamento axial compressivo, paralelo ao longo eixo do implante, nas plataformas protéticas hexagonais externas (HE) e internas (HI). Nessa análise, 40 implantes e 40 pilares tipo post ou munhão para prótese cimentada foram divididos em quatro grupos de dez: 1) hexágono externo e pilar angulado 25º com cinta de 2 mm (HE2); 2) hexágono externo e pilar angulado 25º com cinta de 4 mm (HE4); 3) hexágono interno e pilar angulado 25º com cinta de 2 mm (HI2); 4) hexágono interno e pilar angulado 25º com cinta de 4 mm (HI4). Cada amostra foi fixada em uma base de aço e levada a uma máquina de ensaios mecânicos para as provas compressivas. Os dados foram tabulados e submetidos à análise de variância Anova dois critérios, com nível de significância de 5%. No grupo HE2, o parafuso do pilar sofreu fratura quando a carga compressiva atingiu 112,21 kgf. No grupo HE4, 120,64 kgf. No grupo HI2, 175,96 kgf. No grupo HI4, 116,03 kgf. A associação do pilar angulado de 25° com cinta de 2 mm ao implante com hexágono interno foi a que apresentou melhor desempenho mecânico. As demais apresentaram resultados semelhantes.
Biomechanical adverse conditions, such as non-passive fit, presence of gaps, and occlusal overload can lead to decrease longevity of angulated abutments due to screw loosening/fracture. The aim of this work was to evaluate the mechanical strength of prosthetic abutments with 2mm and 4mm collar heights under axial compressive static loading over external (EH) and internal (IH) hexagon implant platforms. Forty implants and 40 25-degree angled abutments for cemented prostheses were divided into four groups of ten each as follows: 1) external hex with 2mm collar height (EH2), 2) external hex with 4mm collar height (EH4), 3) internal hex with 2mm collar height (IH2) and, 4) internal hex with 4mm collar height (IH4). Each sample was secured to a stainless steel base and loaded in a universal testing machine until failure. Data was submitted to 2-way ANOVA (5% significance level). Abutment screw fractures were seen for EH2, EH4, IH2, and IH4 at 112.21kgf, 120.64kfg, 175.96kgf, and 116.03kgf, respectively. The use a 25-degree abutment with 2mm collar height (IH2) presented the best mechanical results. Also, similar results were demonstrated for all other groups