유구치 상아질의 각 부위에 적용된 수종의 복합레진 접착제의 미세인장접착강도에 관한 연구
MICRO-TENSILE BONDING STRENGTH OF REGIONAL PRIMARY MOLAR DENTIN
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초록
본 연구는 유구치 상아질의 각기 다른 부위(표층부, 심층부, 치경부)에서 복합레진 접착제의 접착강도를 비교, 평가하기 위 하여 임상에서 흔히 사용하고 있는 서로 다른 4종의 접착방식(3-step total etch: 1군, 2-step total etch: 2군, 2-step self-etch: 3군, all-in-one: 4군)을 적용하고 복합 레진 (Light-CoreTM Core Build-Up Composite)을 적층한 후, 미세인 장접착강도를 비교하였을 때 다음과 같은 결과를 얻었다. 1. 접착방식간의 비교에서 레진의 접착방식에 따른 상아질 각 부위에서의 미세인장접착강도는 제 1군이 표층부에서 뚜렷 이 높았으나(p<0.05) 2, 3, 4군은 부위에 따른 차이가 없었다. 2. 부위별 미세인장접착강도를 비교하여 보았을 때 상아질 표층부에서의 미세인장접착강도는 레진의 접착 방식간에 차이 가 없었으나, 심층부에서는 2군, 3군, 4군 및 1군의 순으로 나타났고(p<0.05), 치경부에서는 2군과 3군이 1군과 4군에 비하여 현저히 높았다(p<0.05).
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.
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