MICRO-TENSILE BONDING STRENGTH OF REGIONAL PRIMARY MOLAR DENTIN

You, Jung-Eun; Choi, Yeong-Chul; Chio, Sung-Chul; Park, Jae-Hong

Journal of the Korean Academy of Pediatric Dentistry 2009;36(3):348-357.
Published online August 31, 2009.

MICRO-TENSILE BONDING STRENGTH OF REGIONAL PRIMARY MOLAR DENTIN

Jung-Eun You², Yeong-Chul Choi¹, Sung-Chul Chio¹, Jae-Hong Park¹

¹Department of Pediatric Dentistry, College of Dentistry, Kyung-Hee University
²Seoul Adventist Dental Hospital

유구치 상아질의 각 부위에 적용된 수종의 복합레진 접착제의 미세인장접착강도에 관한 연구

유정은², 최영철¹, 최성철¹, 박재홍¹

¹경희대학교 치과대학 소아치과학교실
²서울위생치과병원

Correspondence: Yeong-Chul Choi, Tel: 02-958-9373, Email: choiyc@khu.ac.kr

Received: 16 January 2009 • Accepted: 16 June 2009

Abstract

The purpose of this study was to evaluate the micro-tensile bond strength (μTBS) of four luting resin to regional dentin of human primary teeth. Dentin from non-carious primary molars were prepared from different regions (s, superficial dentin; d, deep dentin; c, cervical dentin), and divided into groups based on anatomical locations and types of luting resins (Scotchbond Multi-purpose : SB ; One-Step : OS ; AdheSE Bond : ASE ; G-Bond : GB) : SB-s, SB-d, SB-c; OS-s, OS-d, OS-c; ASE-s, ASE-d, ASE-c ; GB-s, GB-d, GB-c. Luting resins were used according to the manufacturers' instructions, to bond Light-CoreTM Core Build-Up Composite) to the exposed dentin specimens in the light-curing mode. After storage for 1 day, μTBS was tested at a cross-head speed of 1 mm/min. Data were analyzed with T-test and two-way ANOVA. The bonding interface and fractography analyses were performed with SEM. The results were as follows : 1. μTBS to superficial dentin was significantly higher than to deep dentin for SB(p<0.05). But there were no significant differences in regional μTBS among OS, ASE, GB(p>0.05). 2. There were no significant differences in μTBS to superficial dentin among each groups. But, in deep dentin, μTBS of SB-d was significantly lower than those of OS-d, ASE-d, and GB-d(p<0.05). μTBS of OS-d was significantly higher than those of GB-d(p<0.05), but there were no significant differences in μTBS of ASEd. There were no significant differences among μTBS of ASE-d, OS-d, and GB-d.

Key Words: Micro-tensile bonding strength, primary tooth, composite resin, dentin adhesives