Aim of study: This study aimed to evalute ceramic surface roughness and micro shear bond strength of selfadhesiveflowable composite versus traditional flowable composite to all ceramic restoration.
Materials and Methods:Sixty discs of IPS e.max press 8mm in diameter and 2mm thickness were fabricated according to manufacture instruction, based on surface treatment used, specimens were divided into 3 equal group (N=20) GA were treated with hydrofluoric acid etching for 30s, GB sandblasted with (30 μm) silica cojet at 4bar pressure, GC irradiated with ND:YAG laser 1W (pulse energy), Surface roughness was detrmined firstly by profilometry and surface morphology was evaluated by SEM.Two types of flowable composite, self-adhesive I and conventional flowable composite IIwere used to bonding to ceramic surface.Micro-shear bond strength evaluated by UTM with cross head speed 0.5mm/min, One-way ANOVA followed by tukey's test were used to analyze the results. Stereomicroscope was used to examine the fractured parts and determine mode of failure.
Results:The highest mean surface roughness value (Ra) was GA (0.253±0.002), and the lowest was GB (0.249±0.0004) with significant difference. GCII was recorded highest mean micro-shear bond strength value (Mpa) (36.93±11.33), significantly difference with GBII which showed lowest mean value. High incidence of interface adhesive failure demonstrated among the groups.
Conclusions:HF is best treatment to rough glass ceramic surface, ND:YAG could accomplish the same efficiency as HF. Silica Coating of IPS e.max press are not effective, Self-adhesive flowable composite has same bonding ability of two step adhesive.