Effect Of Dentin Desensitizers On Shear Bond Strength Of Resin Cements

Lee, Ho; Jin, Tai Ho; Son, Oe Soo; Ahn, Hee Young

Abstract

The purpose of this study was to investigate the effects of desensitizer on shear bond strength of adhesive resin cements for all ceramic crown. For this study,Gluma desensitizer(R)(Heraeus Kulzer, Germany)and MS Coat(R)(Sun medical, Japan)were used as desensitizer,and Bistite II(R) resin cement(Tokuyama, Japan)and VariolinkII(R) resin cement(Ivoclar, Liechtenstein) were used. IPS Empress ceramics were bonded to dentin surfaces after application of desensitizer and shear bond strength of specimens were measured using UTM(Zwick 1456 41, Zwick, Germany)at a crosshead speed of 1mm/min. The obtained results were as follows: 1. The shear bond strength of both resin cements were not affected by Gluma desensitizer(R) containing HEMA. 2. The shear bond strength of Bistite II(R) resin cement was significantly decreased by MS Coat(R). 3. The failure mode in MS Coat(R)-Bistite II(R) group was mainly adhesive type between dentin and resin cement, but that of Gluma desensitizer(R)-Variolink II(R) group was mainly mixed type, combined adhesive failures between dentin and resin cement or porcelain and resin cement.