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Effect of Light Aging on Silicone‐Resin Bond Strength in Maxillofacial Prostheses
Author(s) -
Polyzois Gregory,
Pantopoulos Antonis,
Papadopoulos Triantafillos,
Hatamleh Muhanad
Publication year - 2015
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12202
Subject(s) - silicone , materials science , bond strength , accelerated aging , composite material , acrylic resin , elastomer , crosshead , silicone resin , adhesive , flexural strength , layer (electronics) , coating
Purpose The aim of this study was to investigate the effect of accelerated light aging on bond strength of a silicone elastomer to three types of denture resin. Materials and Methods A total of 60 single lap joint specimens were fabricated with auto‐, heat‐, and photopolymerized (n = 20) resins. An addition‐type silicone elastomer (Episil‐E) was bonded to resins treated with the same primer (A330‐G). Thirty specimens served as controls and were tested after 24 hours, and the remaining were aged under accelerated exposure to daylight for 546 hours (irradiance 765 W/m 2 ). Lap shear joint tests were performed to evaluate bond strength at 50 mm/min crosshead speed. Two‐way ANOVA and Tukey's test were carried out to detect statistical significance ( p < 0.05). Results ANOVA showed that the main effect of light aging was the most important factor determining the shear bond strength. The mean bond strength values ranged from 0.096 to 0.136 MPa. The highest values were recorded for auto‐ (0.131 MPa) and photopolymerized (0.136 MPa) resins after aging. Conclusions Accelerated light aging for 546 hours affects the bond strength of an addition‐type silicone elastomer to three different denture resins. The bond strength significantly increased after aging for photo‐ and autopolymerized resins. All the bonds failed adhesively.