13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

- Oral Presentation 11

TITLE: Effect of laser application on push out bond strength of FRC post to root canal dentin.

AUTHORS: Rikhtegaran S, Oskoee S, Pouralibaba F, Bahary M, Chehrebardar A.

Operative and esthetic dentistry department.

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S11.

* doi:10.4317/medoral.17643510

http://dx.doi.org/10.4317/medoral.17643510

Abstract

Introduction: Fiber-reinforced composite posts are being used in restoring endodontically treated teeth. Optimum adhesion between the post and root canal dentin is a basic concept which needs appropriate treatment procedure applied on the post surfaces. There are few methods to condition the surface of such posts, inclu-ding chemical and physical procedures. aim of the study: Investigating the effect of CO₂ and Nd:YAG lasers on push out bond strength of quartz fiber compo-site posts to root canal dentin.

Methods and materials: In this study 60 premolars after root canal preparation were obdurated and the post spaces were prepared. Samples were divided in three groups. In first and second groups posts were treated with Nd: YAG and CO₂ lasers (2 watts, 1mm distance and 15 s). In The third group the posts had no treatment. The posts were cemented into the teeth root canals by a self-etch resin cement. By sectioning samples a whole number of 180 specimens were undergone the Push-out bond test using a universal testing machine. Data analyzed using ANOVA and Tukey (HSD) tests.

Results: Bond strength Mean values of 3 groups of the study are Nd: YAG laser: 46.4646 ± 9.74742; CO₂ laser 27.6128 ± 11.37682 and Control group: 26.4015 ± 8.30417.

Conclusion: With the parameters used in this study Nd:YAG laser could be an effective surface treatment method, while CO₂ laser had no significant effect on bond strength of posts.