Results: 217

Six-month bracket failure rate with a flowable composite: A split-mouth randomized controlled trial

ABSTRACT INTRODUCTION: The use of flowable composites as an orthodontic bonding adhesive merits great attention because of their adequate bond strength, ease of clinical handling and reduced number of steps in bonding. OBJECTIVE: The aim of this Randomized Controlled Trial was to comparatively evaluat...

Prototype to measure bracket debonding force in vivo

ABSTRACT Introduction: Material biodegradation that occurs in the mouth may interfere in the bonding strength between the bracket and the enamel, causing lower bond strength values in vivo, in comparison with in vitro studies. Objective: To develop a prototype to measure bracket debonding force in viv...

Effect of nanotechnology in self-etch bonding systems on the shear bond strength of stainless steel orthodontic brackets

ABSTRACT Objective: To evaluate the effect of silica dioxide (SiO2) nanofillers in different bonding systems on shear bond strength (SBS) and mode of failure of orthodontic brackets at two experimental times. Methods: Ninety-six intact premolars were divided into four groups: A) Conventional acid-etch...

Efeito da contaminação por saliva humana na interface adesiva: resistência de união, análise de camada híbrida e conversão de sistemas adesivos

Este estudo teve como objetivo analisar o efeito da contaminação por saliva humana na resistência de união (RU) da interface adesiva em dentina por microtração, nas características morfológicas da camada híbrida (CH) em microscopia confocal e no grau de conversão (GC) de 2 sistemas adesivos: Ad...

A study of the modification of Y-TZP and resin cement with titanium dioxide nanotubes

Titanium dioxide nanotubes (TiO2) have been applied to enhance the mechanical properties of dental materials. Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) has been increasingly used in dentistry. Aside from its optimal clinical results, Y-TZP is prone to failures related to insufficient thi...

A oportunidade de tratamentos híbridos na era da ortodontia digital

Tratamentos híbridos associados à Ortodontia Digital são uma eficiente opção para tratamentos de casos clínicos simples e complexos. O propósito desse trabalho é atualizar os ortodontistas sobre a realidade e oportunidade de realizar tratamentos combinados, assim como usufruir das últimas tecnol...

Colagem moderna para proteção do arco do sorriso

Apesar da colagem ortodôntica significar o início do tratamento, o Ortodontista tem que pensar já na finalização durante a execução desse procedimento. A precisão na colagem determinará a qualidade da finalização dos casos clínicos. Assim, uma rotina deve ser adotada, bem como uma atenção e...

Influence of root dentin treatment on the push-out bond strength of fibre-reinforced posts

Abstract This study evaluates the influence of root dentin treatment with NaOCl alone and combined with EDTA, with and without ultrasound activation, on the push-out bond strength (BS) of fiber-reinforced posts in weakened roots, cemented with RelyX or Panavia. The root canals of 42 maxillary canines wer...

One-year aging effects on microtensile bond strengths of composite and repairs with different surface treatments

Abstract The present study aimed to evaluate effects of different surface treatments and aging of composite cylinders on bond strength of composite resin repair. Thirty-two composite cylinders were produced and divided into four groups according to type of surface treatment and storage time of composite ...

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

Abstract This study evaluated the removal of filling material with ProTaper Universal Rotary Retreatment system (PTR) combined with solvents and the influence of solvents on the bond strength (PBS) of sealer to intraradicular dentin after canal reobturation. Roots were endodontically treated and distribu...