Influence of Adaptation and Adhesion on the Retention of Computer-aided Design/Computer-aided Manufacturing Glass Fiber Posts to Root Canal.Bioloren
The study aimed to assess the effect of friction and adhesion on the pushout bond strength of CAD/CAM fiber-reinforced composite (FRC) post and cores in comparison to prefabricated fiber posts.
MATERIALS AND METHODS:
Thirty extracted single-rooted premolars were divided into three groups (N = 10): CP: CAD/CAM FRC posts (Trilor, Bioloren) cemented with self-adhesive resin cement (Rely X U200, 3M) as control group. CPL: CAD/CAM FRC composite posts cemented with the same self-adhesive resin cement after lubricating the root canal with petroleum jelly (Vaseline, Unilever) to prevent adhesion. RXP: prefabricated posts cemented with self-adhesive resin cement. Specimens were subjected to thermal cycling and then to pushout tests. The mode of failure was observed using a stereomicroscope. Results were analyzed by two-way ANOVA followed by a Tukey’s post hoc test for comparison, p = 0.05.
Push-out bond strength was significantly lower in the RXP group (8.54 ± 3.35 MPa) in comparison to CP (12.10 ± 1.38 MPa), while no significant differences were concluded between the other groups. Failure was mostly adhesive for CPL and RXP and adhesive and mixed for CP.
Custom made CAD/CAM posts have a positive effect on the retention of FRC posts to root canal walls while adhesion between self-adhesive cement and root dentin did not influence significantly the pushout bond strength of CAD/CAM posts to root canal.
The friction of well-adapted CAD/CAM fiber post and cores plays a predominant role in the success of post restorations of endodontically treated teeth.
Adhesion; Computer-aided design/computer-aided manufacturing fiber post; Friction; Pushout strength Self-adhesive cement.
1 Department of Prosthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon, Phone: +961 3695576, e-mail: firstname.lastname@example.org.
2 iDent Lab, Cluj-Napoca, Romania.3Department of Prosthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.
4 Department of Restorative Dentistry and Endodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon.
5 Department of Medical Biotechnologies, Division of Fixed Prosthodontics, University of Siena, Siena, Italy.
6 Department of Research, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.