유치에 적용된 all-in-one 상아질 접착 시스템의 전단강도에 관한 비교연구
Comparative study on the shear bond strength of all-in-one dentin bonding system applied to primary teeth
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초록
유치 60개를 준비하였으며, 사용된 접착 시스템은 AQ Bond PlusTM, G BondTM, Single BondTM였다. 유치의 법랑질과 상아질을 노출시킨 후 제조사의 지시에 따라 접착 레진을 적용한 후, 내경 1.7 mm의 폴리에틸렌 튜브를 이용하여 Z-250TM 복합레진을 수복하였다. 100% 습윤 상태에서 24시간동안 보관 후 5℃와 55℃ 조건하에서 500회 열순환을 시행 후 만능시험기로 전단결합강도를 측정하였다. Resin tag 관찰을 위하여 상아질 접착면에 대해 수직으로 절단하고 인산과 질산으로 처리하여 치질을 용해시킨 후 주사 전자 현미경으로 관찰한 결과 다음과 같은 결론을 얻었다. 1. 유치 법랑질에서 측정된 전단 결합 강도는 AQ Bond PlusTM에서 1.04 ± 0.13 MPa, G BondTM에서 1.23 ± 0.35 MPa, Single BondTM에서 1.28 ± 0.50 MPa이었으며, 세 군 간의 유의차는 없었다. 2. 유치 상아질에서의 전단 결합 강도는 AQ Bond PlusTM는 1.15 ± 0.37 MPa, G BondTM는 1.69 ± 0.74 MPa 그리고 Single BondTM는 0.56 ± 0.11 MPa로 나타났으며, AQ Bond PlusTM와 G BondTM 간에는 통계학적 유의차가 없었으나(p>0.05), AQ Bond PlusTM와 Single BondTM, G BondTM과 Single BondTM 간에는 통계학적 유의차를 보였다. 3. 주사 전자 현미경 소견에서 AQ Bond PlusTM와 G BondTM는 resin tag 형성이 매우 미약하고 짧은 양상을 보인 반면, Single BondTM에서는 길게 형성된 resin tag가 관찰되었으며 resin tag의 표면에 불규칙하게 형성된 측부가지들이 관찰되었다.
Abstract
This study was performed to compare the shear bond strength of primary enamel & dentin treated by AQ Bond PlusTM and G BondTM, recently developed 6th generation dentin bonding system, to that of Single BondTM being widely used. Also by observing the resin tag under scanning electron microscope, Resin tags of each material were also observed under scanning electron microscope and compared to one another. The possibility of clinical application of All-in-One system which has an advantage to reduce chair-time for children with difficult behavior pattern was evaluated. The results obtained are as follows: 1. No statistically significant difference between groups was found in shear bond strength of primary enamel. 2. In primary dentin, the shear bond strength of AQ Bond PlusTM was 1.15 ± 0.37 MPa, G BondTM was 1.69 ± 0.74 MPa and Single BondTM was 0.56 ± 0.11 MPa. There were no statistical difference between AQ Bond PlusTM and G BondTM and between G BondTM and Single BondTM, whereas statistically significant difference was found between AQ Bond PlusTM and Single BondTM. 3. Under scanning electron microscope, resin tags observed in AQ Bond PlusTM and G BondTM were very weak and tangled while strong and thick tags were shown with many lateral branches in Single BondTM. The result of the present study coupled with the advantages of less working time over the previous generation suggests that All-in-One system might be effectively used in adhesive dental procedures for primary teeth.
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