4 documents found, page 1 of 1
Force Degradation of Elastomeric Chains after Storage Time and Mechanical Brushing
Silva Chaves-Filho,Antonio Carlos da; Costa,Ana Rosa; Borges,Lincoln Pires Sousa; Santos,Eduardo Cesar Almada; Crepaldi,Marcus ViniciusAbstract The purpose of this in vitro study was to evaluate the force decrease of different elastomeric chains after different times: initial, 10 minutes, 1 day, 28 days and after mechanical brushing. Twenty orthodontic elastomeric chains segments were utilized for each commercial brand. Initially, the elastomeric chain of 15mm long were immediate stretched up to 20 mm in an Instron and the force was measured i...
Effect of Hydrofluoric Acid Concentration and Thermal Cycling on the Bond Stren...
Aguiar,Ana Paula; Costa,Ana Rosa; Correr,Américo Bortolazzo; Vedovello,Silvia Amélia; Vedovello Filho,Mário; Crepaldi,Marcus ViniciusAbstract This study to evaluate the effects of different hydrofluoric acid (HF) concentrations and thermal cycling on the shear bond strength (SBS) of brackets to ceramic. Cylinders of ceramic were divided into 10 groups (n=15), according to HF concentrations: 1-1%;2-2.5%;3-5%;4-7.5%;5-10% (storage 24 h); 6-1%;7-2.5%;8-5%;9-7.5%; and, 10-10% (thermal cycling). All cylinders were etched for 60s and received one ...
Influence of Thermal Cycles Number on Bond Strength of Metallic Brackets to Cer...
Jurubeba,José Eliú Pereira; Costa,Ana Rosa; Correr-Sobrinho,Lourenço; Tubel,Carlos Alberto Malanconi; Correr,Américo Bortolazzo; Vedovello,Silvia AméliaAbstract The aim of this study was to evaluate the effect of different number of thermal cycles on the shear bond strength (SBS) of metallic orthodontic brackets bonded to feldspathic ceramic by a composite resin. Twenty-five ceramic cylinders were etched with 10% hydrofluoric acid for 60 s and received two layers of silane. Brackets were bonded to the cylinders using Transbond XT and assigned to 5 groups (n=5)...
Estudo da recidiva da sobremordida relacionada com a curva de Spee, em paciente...
Freitas,Karina Maria Salvatore de; Crepaldi,Adriana; Freitas,Marcos Roberto de; Fonseca,Ruy Carlos; Crepaldi,Marcus ViniciusINTRODUÇÃO: a estabilidade dos resultados do tratamento ortodôntico é um assunto muito estudado na literatura, sem respostas conclusivas. A sobremordida, ou trespasse vertical, define-se como a relação vertical entre as bordas incisais dos incisivos superiores e inferiores, apresentando-se como um aspecto importante na avaliação dos resultados do tratamento e sua estabilidade. OBJETIVO: este estudo se propôs a ...