유동성 레진 수복술에서 접착제 중합 여부에 따른 미세누출과 전단결합강도에 관한 연구
The effects of photopolymerization of adhesive on shear bondstrength and microleakage of flowable resin restoration
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본 연구는 소아 환자의 유동성 복합 레진 수복 시 접착제의 사용 및 중합 여부 그리고 접착제 종류에 따른 수복물 변연의 미세누출과 전단결합강도를 비교함으로써 치료 시간의 단축 가능성을 타진해보고자 시행하였다. 미세누출을 평가하기 위해 우식이 없거나 법랑질에 제한된 우식이 있는 상, 하악 소구치 84개, 전단결합강도 평가를 위해 협설면에 우식이나 결손부가 없는 대구치 70개를 각각 준비하여 사용하였다. 접착 시스템의 종류에 따라 총 7군을 설정하여 Ⅰ군과 Ⅱ군은 Single Bond™, Ⅲ군과 Ⅳ군은 AQ Bond Plus™, Ⅴ군과 Ⅵ군은 Prompt L-Pop™ 그리고 접착 시스템을 사용하지 않고 레진을 충전하는 Ⅶ군을 대조군으로 설정하였다. 미세누출과 전단결합강도를 측정하여 다음과 같은 결과를 얻었다. 1. 미세누출 평가 결과 Single Bond™를 사용한 Ⅰ군과 Ⅱ군이 다른 군에 비하여 낮은 염료 침투를 나타냈다. Ⅰ군과 Ⅱ군 사이의 염료 침투 양상은 유사하게 나타났다. 2. 전단결합측정결과 Ⅰ군과 Ⅱ군이 다른 군에 비하여 높은 수치를 나타냈으며 통계적 유의차를 보였다(p<0.05). Ⅰ군과 Ⅱ군 사이에는 유의차가 없었다(p>0.05). 3. Ⅰ군과 Ⅱ군, Ⅲ군과 Ⅳ군, Ⅴ군과 Ⅵ군 사이에는 통계적 유의차가 없었다(p>0.05). 4. Ⅶ군은 Ⅰ, Ⅱ군과 Ⅴ, Ⅵ군에 비하여 통계적 유의차가 있게 낮은 전단 결합 강도를 보였으며(p<0.05) Ⅲ, Ⅳ군과 는 보다 낮은 수치를 보였으나 통계학적 유의차는 없었다(p>0.05).
Abstract
This study was performed to evaluate possibility to reduce treatment time for child patient who have limited control activity during flowable composite resin restoration according to comparing microleakage and shear bond strength. Group Ⅰ, Ⅱ with Single Bond™, group Ⅲ, Ⅳ with AQ Bond Plus™, group Ⅴ, Ⅵ with Prompt L-Pop™, and group Ⅶ as control group without adhesive system. 12 premolars and 10 molars were assigned into each group. Restorative material was used the Filtek Z350™ flowable. The results were as follows; 1. The result of microleakage evaluation, in the group Ⅰ, Ⅱ with Single Bond™ showed low dye penetration score. Dye penetration between group Ⅰ and group Ⅱ were similar. 2. Results for shear bond strength at group Ⅰ and group Ⅱ showed values higher than other groups. (p<0.05) There were no statistical differences between group Ⅰ and group Ⅱ. (p>0.05) 3. There was no statistical differences among Ⅰ and Ⅱ, Ⅲ and Ⅳ, Ⅴ and Ⅵ groups. 4. Group Ⅶ showed significantly low shear bond strength than group Ⅰ, Ⅱ, Ⅴ, Ⅵ(p<0.05). Group Ⅶ showed low value than group with Ⅲ and Ⅳ, but no statistical significances. In conclusion, adhesive bonding resin was not affect significantly to microleakage and shear bond strength of flowable resin restoration. Therefore, to reduce the operation time, adhesive bonding resin and flowable composite resin can be cured at once. But contamination of saliva, location of cavities can affect to bond strength in clinical field.
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