레진 인레이 합착시 지각과민처리제의 사용이 상아질 결합강도에 미치는 영향
EFFECT OF A DESENSITIZER ON DENTINAL BOND STRENGTH IN CEMENTATION OF COMPOSITE RESIN INLAY
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초록
본 연구는 인레이 와동에서 인상을 채득하기 전 지각과민처리제 (Isodan)과 2단계 전부식 접착시스템 (One-Step)과 단일단계 자가부식 접착시스템 (All-Bond SE)으로 처리한 후, 복합레진 인레이를 자가 접착형 레진시멘트인 BisCem으로 합착시 키는 경우 레진 인레이의 상아질에 대한 미세인장결합강도와 주사현미경적인 분석을 통하여 비교하였다. 본 연구의 결과, 지각과민처리제인 Isodan만을 사용하는 경우 레진 인레이의 결합강도를 감소시킬 수 있으므로 단독 사용보다는 단일 단계 자가부식 시스템 (All-Bond SE)과 같이 사용하는 것이 추천된다.
Abstract
The purpose of this study was to evaluate the effect of a desensitizer on dentinal bond strength in cementation of composite resin inlay. Fifty four molar teeth were exposed the occlusal dentin. Class I inlay cavities were prepared and randomly divided into six groups. Control group ; no agent, Group 1 ; Isodan, Group 2 ; One-step, Group 3 ; All-Bond SE, Group 4 ; Isodan + One-step, Group 5 ; Isodan + All-Bond SE. Desensitizing agent and dentin bonding agents were applied immediately after the completion of the preparations. Impressions were then made. The composite resin inlays (Tescera, Bisco) were fabricated according to the manufacturers' guidelines. Cementation procedures followed a standard protocol by using resin cement (Bis-Cem, Bisco). Specimens were stored in distilled water at 37 ℃ for 24 hours. All specimens were sectioned to obtained sticks with 1.0 × 1.0 mm2 cross sectional area. The microtensile bond strength (μTBS) was tested at crosshead speed of 1 mm/min. The data was analyzed using oneway ANOVA and Tukey's test. Scanning electron microscopy analysis was made to examine the details of the bonding interface. 1. Group 1 showed significantly lower μTBS than other groups (p<0.05). 2. There was no significant difference between the μTBS of Group 3 and Group 5. 3. The μTBS of Group 4 showed significantly lower than that of Group 2 (p<0.05). In conclusion, a desensitizer (Isodan) might have an adverse effect on the bond strength of composite resin inlay to dentin.
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