Abstract: | ObjectivesThe aim of this study was to evaluate the influence of two adhesive systems and
the post space region on the degree of conversion of dual resin cement and its
bond strength to root dentin.Material and MethodsOne three-step etch-andrinse (All-bond 2, Bisco) and another one-step self-etch
(Xeno III, Dentsply) adhesive systems were applied on 20 (n=10) crownless bovine
incisors, at 12-mm-deep post space preparation, and a fiber post (DT Light Post,
Bisco) was cemented using a dual cure resin cement (Duo-Link, Bisco). Three
transverse sections (3 mm) were obtained, being one from each study region
(cervical, middle and apical). The degree of conversion of the dual cure resin
cement was determined by a micro-Raman spectrometer. The data (%) were submitted
to repeated-measures analysis of variance and Tukey''s test (p<0.05).ResultsFor both groups, the degree of conversion means (%) (All bond 2cervical
= 69.3; All bond 2middle = 55.1; All bond 2apical= 56; Xeno
IIIcervical = 68.7; Xeno IIImiddle = 68.8; Xeno
IIIapical = 54.3) were not significantly different along the post
space regions (p<0.05).ConclusionNeither the adhesive nor the post space region influenced the degree of conversion
of the cement layer. |