ABSTRACT Objective: This study investigated the Weibull parameters and 5% fracture probability of direct, indirect composites, and CAD/CAM composites. Material and Methods: Discshaped (12 mm diameter x 1 mm thick) specimens were prepared for a direct composite [Z100 (ZO), 3M-ESPE], an indirect laborato...
Análisis de Varianza,
Resinas Compuestas/química,
Diseño Asistido por Computadora,
Fracaso de la Restauración Dental,
Restauración Dental Permanente/métodos,
Ensayo de Materiales,
Microscopía Electrónica de Rastreo,
Docilidad,
Probabilidad,
Valores de Referencia,
Reproducibilidad de los Resultados,
Cementos de Resina/química,
Silicatos/química,
Dióxido de Silicio/química,
Estrés Mecánico,
Propiedades de Superficie,
Resistencia a la Tracción,
Factores de Tiempo,
Tocoferoles/química,
Fracturas de los Dientes,
Circonio/química
bTi T-type loops are a frictionless, efficient alternative for extraction space closure. Changes in the upper horizontal portion of T-type loops to improve their mechanical behavior have been proposed, but differences in their biomechanical characteristics have not been well described. This stu dy analyz...
ABSTRACT Torsional overload is a fracture representative parameter for instruments in single-file techniques. Objective The aim of this study was to assess the influence of clinical use, in vivo, on the torsional behavior of Reciproc and WaveOne instruments considering the possibility that they degrade...
Instrumentos Dentales,
Diseño de Equipo,
Falla de Equipo,
Ensayo de Materiales,
Microscopía Electrónica de Rastreo,
Níquel,
Valores de Referencia,
Preparación del Conducto Radicular/instrumentación,
Rotación,
Estrés Mecánico,
Propiedades de Superficie,
Titanio,
Torque,
Torsión Mecánica
abstract Objective: This paper analyzed whether nickel-titanium closed coil springs (NTCCS) have a different superelastic (SE) behavior according to activation and whether their force plateau corresponds to that informed by the manufacturer. Methods: A total of 160 springs were divided into 16 subgrou...
Dentin hypersensitivity is a relatively common clinical condition, which affects a large part of the world's population. The objective of this study was to evaluate the influence of previous and prolonged treatment with desensitizing dentifrices (DD) on bond strength to dentin, promoted by a self-etching...
ABSTRACT Because many mechanical variables are present in the oral cavity, the proper load transfer between the prosthesis and the bone is important for treatment planning and for the longevity of the implant-supported fixed partial denture. Objectives To verify the stress generated on the peri-implant...
Análisis de Varianza,
Aleaciones de Cromo/química,
Fuerza Compresiva,
Aleaciones Dentales/química,
Diseño de Prótesis Dental,
Prótesis Dental de Soporte Implantado/métodos,
Análisis del Estrés Dental,
Dentadura Parcial Fija,
Módulo de Elasticidad,
Ensayo de Materiales,
Paladio/química,
Valores de Referencia,
Reproducibilidad de los Resultados,
Plata/química,
Estrés Mecánico,
Torque
O objetivo deste estudo foi avaliar os efeitos de duas técnicas de gradação da
zircônia no limite de fadiga de próteses parciais fixas (PPFs) de 03 elementos.
Blocos pré-sinterizados de 3Y-TZP (zircônia policristalina parcialmente estabilizada
por 3% mol de ítria) foram fresados para obter 69 PPF...
Fraturas completas ou por delaminação são causas frequentes de insucesso entre coroas unitárias cerâmicas. O uso de materiais à base de resina composta, em contraponto à natureza friável das cerâmicas, parece ser uma alternativa para coroas posteriores, uma vez que apresentam processo de fabrica...
Fracturas de los Dientes,
Coronas/normas,
Porcelana Dental/química,
Diseño Asistido por Computadora,
Resinas Compuestas/química,
Ensayo de Materiales,
Estrés Mecánico,
Fracaso de la Restauración Dental,
Estadísticas no Paramétricas,
Valores de Referencia,
Reproducibilidad de los Resultados
Abstract The use of a free-radical polymerization inhibitor, butylhydroxytoluene (BHT), and a common photo-initiator, camphorquinone (CQ), to reduce polymerization stress in dental composite was investigated in this study. Samples were prepared by mixing Bis-GMA, UDMA, and TEGDMA at a 1:1:1 ratio (wt%), ...
Análisis de Varianza,
Bisfenol A Glicidil Metacrilato/química,
Hidroxitolueno Butilado/química,
Resinas Compuestas/química,
Luces de Curación Dental,
Módulo de Elasticidad,
Ensayo de Materiales,
Metacrilatos/química,
Docilidad,
Polietilenglicoles/química,
Polimerizacion,
Ácidos Polimetacrílicos/química,
Poliuretanos/química,
Valores de Referencia,
Estrés Mecánico,
Terpenos/química,
Factores de Tiempo
Abstract This study aimed to evaluate the influence of the type of prosthetic abutment associated to different implant connection on bone biomechanical behavior of immediately and delayed loaded implants. Computed tomography-based finite element models comprising a mandible with a single molar implant we...
Análisis de Varianza,
Fenómenos Biomecánicos,
Huesos/fisiología,
Diseño Asistido por Computadora,
Tomografía Computarizada de Haz Cónico,
Pilares Dentales,
Diseño de Implante Dental-Pilar/métodos,
Análisis de Elementos Finitos,
Imagenología Tridimensional/métodos,
Carga Inmediata del Implante Dental/métodos,
Modelos Biológicos,
Reproducibilidad de los Resultados,
Estrés Mecánico
