높은 산도의 Universal Adhesive와 이중중합형 복합레진 간의 전단결합강도 증진 방안
Strategies for enhancing the shear bond strength using highly acidic universal adhesive and dual-cured composite resin
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"목적: 범용 상아질접착제와 이중중합형 복합레진의 전단결합강도를 측정하고, 결합강도 증가 요인을 비교 분석하였다. 연구 재료 및 방법: 40개의 발거된 제3대구치를 사용하여 상아질을 노출시키고 G-Premio BOND를 적용한 뒤 4그룹으로 분류하였다. Luxacore Z Dual을 4 mm 두께로 충전한 군(G1군), Luxacore Z Dual을 1 mm / 3 mm 나누어 충전한 군(G2군), Scotchbond multipurpose의 접착제를 추가 적용한 후 Luxacore Z Dual 4 mm 충전한 군(G3군), Fill and core 4 mm 충전한 군(G4군)으로 무작위 배정하였다(n = 10). 실온 증류수에 24시간 보관한 후, universal testing machine을 이용하여 전단결합강도를 측정하였다. 결과: G1군이 다른 군에 비해 낮은 전단결합강도를 나타냈다. 반면 G2군이 가장 높은 전단결합강도를 보였으며, G3군이 다음으로 높은 전단결합강도를 나타냈다. G2군과 G3군은 나머지 군들과 유의미한 차이를 보였다. 결론: 높은 산도의 범용 상아질접착제와 이중중합 복합레진을 사용할 때 이중중합 복합레진을 1 mm 미만으로 얇게 적용 후 광중합거나, 범용상아질 접착제 적용 후, 4세대 상아질 접착제의 소수성 접착제를 추가로 적용함으로써 결합강도를 향상시킬 수 있음을 실험적으로 입증하였다."
Abstract
Purpose: The aim of this study was to measure the shear bond strength of universal adhesive and dual-cured composite resin, and to analyze various factors that could increase bond strength. Materials and Methods: Forty extracted third molars were used to expose the dentin and apply G-Premio BOND, after which they were randomly divided into four groups. Group 1 (G1) was filled with Luxacore Z Dual 4 mm in one step, Group 2 (G2) had Luxacore Z Dual filled in two stages (1 mm / 3 mm), Group 3 (G3) had Luxacore Z Dual filled to 4mm after applying Scotchbond multipurpose adhesive, and Group 4 (G4) was filled with Fill and Core 4 mm in one step (n = 10). After storing in distilled water at room temperature for 24 hours, shear bond strength was measured using a universal testing machine. Results: The group in which Luxacore Z Dual was placed in a 4 mm increment exhibited lower shear bond strength compared to all other groups. In contrast, the group where Luxacore Z Dual was initially light-cured in 1 mm increments before additional increments showed the highest shear bond strength. The group with Scotchbond multipurpose adhesive additionally applied demonstrated the next highest bond strength. These two groups showed statistically significant differences from the other groups. Conclusion: The bond strength of dual-cured composite resin with highly acidic universal adhesive may be enhanced by applying a thin coat of dual-cured composite resin first or additional application of hydrophobic adhesive.