Effect of surface treatments of fiber posts on bond strength to composite resin cores

Hye-Jo Keum; Hyun-Mi Yoo

doi:10.5395/JKACD.2010.35.3.173

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Keum and Yoo: Effect of surface treatments of fiber posts on bond strength to composite resin cores

Basic Research

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2010; 35(3): 173-179.

Published online: 31 May 2010

DOI: https://doi.org/10.5395/JKACD.2010.35.3.173

Effect of surface treatments of fiber posts on bond strength to composite resin cores

Hye-Jo Keum, Hyun-Mi Yoo

Department of Conservative Dentistry, The Institute of Oral Health Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

Correspondence to: Hyun-Mi Yoo. Department of Conservative Dentistry, Samsung Medical Center, Sungkyunkwan University School of Medicine 50 Irwon-dong, Kangnam-gu, Seoul, 135-710, Korea. Tel: 82-2-3410-2420, Fax: 82-2-3410-0038, smcyoo@hanmail.net

Received 17 April 2010 Revised 22 April 2010 Accepted 24 April 2010

Abstract

The purpose of the present study was to compare the influence of post-surface treatment with silane, hydrogen peroxide, hydrofluoric acid or sandblasting and to investigate the effect of silane in combination of the other treatments on the microtensile bond strength between fiber posts and composite resins for core build-up. Thirty-two glass-fiber posts (FRC Postec Plus, Ivoclar Vivadent, Schaan, Liechtenstein) were divided into eight groups according to the different surface pretreatments performed: silane application (S); immersion in 28% hydrogen peroxide (HP); immersion in hydrogen peroxide followed by application of silane (HP-S); immersion in 4% hydrofluoric acid gel (HF); immersion in hydrofluoric acid gel followed by application of silane (HF-S); sandblasting with aluminum oxide particles (SB); sandblasting followed by application of silane (SB-S). In control group, no surface treatment was performed. The composite resin (Tetric Flow, Ivoclar Vivadent, Schaan, Liechtenstein) was applied onto the posts to produce the composite cylinder specimen. It was sectioned into sticks to measure the microtensile bond strength. The data was analyzed with one-way ANOVA and LSD test for post hoc comparison (p < 0.05). Post pretreatment with sandblasting enhanced the interfacial strength between the fiber posts and core materials. Moreover, sand-blasting followed by application of silane appears to be the most effective method that can improve the clinical performance of glass fiber posts.

Keywords: Fiber post, Composite resin core, Microtensile bond strength, Post surface conditioning, Silanization, Sandblasting

Figures and Tables

Figure 1

Schematic diagram of the sectioning procedure.

Table 1

Group classification and procedures for post surface treatment

Table 2

Microtensile bond strength (MPa) and statistical comparison

^*Same superscript letters mean no statistical difference (p < 0.05, LSD test).

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