Influence of airborne-particle abrasion on flexural strength of fiber-reinforced composite post.
10.14368/jdras.2016.32.1.24
- Author:
Eun Ju SIM
1
;
Jin Woo KIM
;
Kyung Mo CHO
;
Se Hee PARK
Author Information
1. Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea. drendo@gwnu.ac.kr
- Publication Type:Original Article
- Keywords:
airborne-particle abrasion;
flexural strength;
FRC post;
three-point flexural test
- MeSH:
Aluminum Oxide;
Resin Cements;
Silicon Dioxide
- From:Journal of Dental Rehabilitation and Applied Science
2016;32(1):24-31
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Many studies have shown that airborne-particle abrasion of fiber post can improve the bonding strength to resin cement. But, airborne-particle abrasion may influence the property of fiber post. The purpose of this study is to evaluate the influence of airborne-particle abrasion on flexural strength of fiber post. MATERIALS AND METHODS: Two fiber-reinforced posts; DT Light Post Size 2 (1.8 mm diameter, Bisco Inc) and RelyX Fiber Post Size 3 (1.9 mm diameter, 3M ESPE); were used in this study. Each group was divided into 3 subgroups according to different surface treatments; without pretreatment: 50 µm aluminum oxide (Cobra®, Renfert): and 30 µm aluminum oxide modified with silica (Rocatec Soft®, 3M ESPE). After airborne-particle abrasion procedure, three-point bending test was done to determine the flexural strength and flexural modulus. The diameter of each posts was measured to an accuracy of 0.01 mm using a digital micrometer. There was no diameter change before and after airborneparticle abrasion. The mean flexural moduli and flexural strengths calculated using the appropriate equations. The results were statistically analyzed using One-way ANOVA and Scheffe's post-hoc test at 95% confidencial level. RESULTS: There was no significant difference on flexural strength between groups. CONCLUSION: In the limitation of this study, flexural strength and flexural modulus of fiber post are not affected by airborne-particle abrasion.
