Abstract The aim of this study was to undertake a qualitative and quantitative assessment of nanoscale alterations and wear on the surfaces of nickel-titanium (NiTi) endodontic instruments, before and after use, through a high-resolution, noncontact, three-dimensional optical profiler, and to verify the ...
Endodoncia/instrumentación,
Diseño de Equipo,
Imagenología Tridimensional/métodos,
Interferometría/métodos,
Ensayo de Materiales,
Níquel/química,
Valores de Referencia,
Reproducibilidad de los Resultados,
Preparación del Conducto Radicular/instrumentación,
Propiedades de Superficie,
Factores de Tiempo,
Titanio/química
El propósito de esteestudio fue evaluar elnivel óseo y el éxito y fracaso de implantes con carga inmediata posicionados inmediatamentedespués de la extracciónpara rehabilitaciones de arco completo ycompararlos con los resultados obtenidos con implantes situados en alvéolos cicatrizados, en un perio...
ABSTRACT Objective: The purpose of this study was to evaluate the deflection forces of Nitinol orthodontic wires placed in different types of brackets: metallic, reinforced polycarbonate with metallic slots, sapphire, passive and active self-ligating, by assessing strength values variation according to ...
Aleaciones/química,
Análisis de Varianza,
Elasticidad,
Fricción,
Ensayo de Materiales,
Níquel/química,
Diseño de Aparato Ortodóncico,
Soportes Ortodóncicos,
Alambres para Ortodoncia,
Cemento de Policarboxilato/química,
Valores de Referencia,
Estadísticas no Paramétricas,
Titanio/química
The objective of this study was to determine the effects of coating nanoparticles of titanium dioxide (TiO2 NPs) and irradiation -UV on plates of titanium (Ti) for the adhesion and proliferation of human gingival fibroblasts (HGF). A total of 15 Ti plates were divided into three groups (n = 5); (i) contr...
Human identification can be performed by several methods, as anatomical structures of the facial skeletal and individuals signals. The aim of this study was to report a case of human identification from the morphological evaluation of the frontal sinus and the presence of titanium plates in skull after e...
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 Aging negatively affects bone/titanium implant interactions. Our hypothesis is that the unbalance between osteogenesis and adipogenesis induced by aging may be involved in this phenomenon. Objective We investigated the osteoblast and adipocyte differentiation of mesenchymal stem cells (MSCs) f...
Adipogénesis/fisiología,
Factores de Edad,
Envejecimiento/fisiología,
Fosfatasa Alcalina/análisis,
Proliferación Celular/fisiología,
Células Cultivadas,
Implantes Dentales,
Expresión Génica,
Lípidos/análisis,
Células Madre Mesenquimatosas/fisiología,
Osteoblastos/fisiología,
Osteogénesis/fisiología,
Reacción en Cadena en Tiempo Real de la Polimerasa,
Propiedades de Superficie,
Titanio/química
ABSTRACT Artificial bone has been employed to reconstruct bone defects. However, only few reports on implant placement after block bone grafting exist. Objectives The purpose of this study was to evaluate the osseointegration of dental implant in bone reconstructions with interconnected porous calcium ...
Sustitutos de Huesos/farmacología,
Trasplante Óseo/métodos,
Implantación Dental Endoósea/métodos,
Diseño de Prótesis Dental,
Durapatita/farmacología,
Fémur/cirugía,
Implantes Experimentales,
Ensayo de Materiales,
Microscopía Electrónica de Rastreo,
Oseointegración/efectos de los fármacos,
Reproducibilidad de los Resultados,
Propiedades de Superficie,
Factores de Tiempo,
Titanio/química
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...
