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Comparative study of shear bond strength between cp Ti / Co-Cr alloy and composite resins

Title
Comparative study of shear bond strength between cp Ti / Co-Cr alloy and composite resins
Other Titles
cpTitanium / Cobalt-Chromium 합금과 복합 레진의 전단결합강도 비교 연구
Authors
윤세희
Issue Date
2007
Department/Major
임상치의학대학원 임상치의학과보철수복치의학전공
Publisher
이화여자대학교 임상치의학대학원
Degree
Master
Abstract
Statement of problem. Composite resin-veneered metal restorations have generated as an alternative to a porcelain-fused-metal restorations. The chief disadvantage is the relatively low bond strength of veneering composite to metal framework compared with porcelain-fused metal restorations. Therefore, various surface treatment methods have been introduced to improve the bond strength. Purpose. The object of this study was to compare the shear bond strength of different combinations of each of the two bonding systems and each of the two composite veneering resins to cp Ti / Co-Cr alloy. Materials and Methods. Two resin bonding systems (metal conditioner containing MEPS monomer, tribochemical silicoating system) and two composite resins (Gradia (GC co., Tokyo, Japan), Sinfony (3M ESPE, Seefeld, Germany)) were tested on a cp Ti and a Co-Cr alloy. After then, according to manufacturers' instructions resin bonding systems and composite resins were applied. All test specimens were divided into four groups for each alloy; Ⅰ) sandblast + Metal Primer Ⅱ+ Gradia (MG), Ⅱ) sandblast + Metal Primer Ⅱ + Sinfony (MS), Ⅲ) Rocatec + Gradia (RG), Ⅳ) Rocatec + Sinfony (RS). The shear bond strength was determined using a universal testing machine and all data were statistically analyzed Mann-Whitney test and Kruskal-Wallis test at the significance level of 0.05. Results. The mean (standard deviations) of shear bond strength according to the combinations of two bonding systems and two composite resins to cp Ti arranged from 16.44 MPa (1.42) to 17.07 MPa (1.69) and the shear bond strength to Co-Cr alloy ranged from 16.26 MPa (1.46) to 17.70 MPa (1.66). There were not statistically significantly different among all groups (p>0.05). Conclusions. The shear bond strengths of composite resins to both cast cp Ti and Co-Cr alloy were not significantly different between metal conditioner and tribochemical silicoating system. And no differences in bond strength were found between a cp Ti and a Co-Cr alloy.;금속-레진 보철물은 금속-도재 보철물의 문제점을 해결하기 위한 대체 재료로 개발되었는데 레진과 하부금속과의 결합강도는 금속-도재 보철물보다 낮아 이를 개선시키기 위한 다양한 표면 처리 방법이 소개되었다. 이 논문의 목적은 두 가지 레진 접착 방법 따른 cp Titanium / Cobalt-Chromium 합금과 복합 레진 간의 전단결합강도에 대해 알아보고 비교하는 것이다. 실험 재료로 비귀금속으로는 cp Ti (ASTM grade Ⅱ, MANFREDI Inc., Italia)과 Co-Cr (Ticonium D/V Inc, Ticonium 2000, America), 레진 접착 방법으로는 Metal Primer Ⅱ(GC co., Tokyo, Japan) 와 Rocatec system (3M ESPE, Seefeld, Germany), 복합 레진으로는 Gradia (GC co., Tokyo, Japan), Sinfony (3M ESPE, Seefeld, Germany)을 사용하였다. Universal testing machine (Zwick Z010, Ulm, Germany)을 사용하여 비귀금속 합금과 복합 레진의 전단결합강도를 측정하였다. 모든 자료는 Mann-Whitney test와 Kruskal-Wallis test를 통해 분석하였으며, 유의수준은 P < 0.05였다. 본 연구로 다음과 같은 결론을 얻었다. 1. cp Ti / Co-Cr 합금에 대한 전장용 복합 레진의 전단결합강도는 Metal PrimerⅡ와 Rocatec system 사이에 유의할만한 차이를 보이지 않았다. 2. cp Ti과 Co-Cr 합금 간의 전단결합강도 역시 차이를 보이지 않았다. 레진-금속 수복물의 접착력 향상을 위해 비귀금속 피착면을 처리해야 할 경우, 복잡한 처리 단계와 시간이 요구되는 Silicoating 방법 보다는 비교적 사용이 간편한 금속 처리제 도포법이 임상적 효율성이 높다고 사료된다.
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