The effect of application errors of an acetone-based adhesive on bond strength to dentin.

Abstract

The purpose of this study was to evaluate the effect of application errors in terms of dispensing time and stirring of an acetone-based multimode adhesive, on micro-shear bond strength to dentin. A total of 40 recently extracted sound human molars were collected from the Department of Oral and Maxillofacial Surgery and used for the bond strength testing. Each tooth was sectioned perpendicular to the long axis to remove the roots. The crown was sectioned mesio-distally to create buccal and lingual halves under copious air-water coolant spray by diamond disc. A total of One-hundred and sixty resin composite specimens were prepared for microshear bond strength testing (µSBS) with dentin. Specimens were grouped into four groups according to the time interval (T) that the adhesive (G-aenialᵀᴹBond) was kept in the closed mixing-well before being applied to the dentin surface. (T0) immediate application (n=40), (T1) 2 minutes delayed application (n=40), (T2) 5 minutes delayed application (n=40), and (T3) 7 minutes delayed application (n=40). Furthermore each of the four groups was subdivided into two subgroups according to activation mode (S) of the adhesive (G-