Title
Influence of the bracket on bonding and physical behavior of orthodontic resin cements
Author
Victoria BOLAÑOS-CARMONA , Bilal ZEIN , Mario MENÉNDEZ-NÚÑEZ , Purificación SÁNCHEZ-SÁNCHEZ , Laura CEBALLOS-GARCÍA and Santiago GONZÁLEZ-LÓPEZ
Year
2015
Journal
Dental Materials Journal
Abstract
The aim of the study is to determine the influence of the type of bracket, on bond strength, microhardness and conversion degree (CD) of four resin orthodontic cements. Micro-tensile bond strength (µTBS) test between the bracket base and the cement was carried out on glass-hour-shaped specimens (n=20). Vickers Hardness Number (VHN) and micro-Raman spectra were recorded in situ under the bracket base. Weibull distribution, ANOVA and non-parametric test were applied for data analysis (p<0.05). The highest values of ή as well as the β Weibull parameter were obtained for metallic brackets with Transbond™ plastic brackets with the self-curing cement showing the worst performance. The CD was from 80% to 62.5%.
Instrument
NRS-5100
Keywords
Raman imaging microscopy, Resin cements, Micro-tensile bond strength, Conversion degree, Microhardness