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Comparative study of the shear bond strength of various veneering materials on commercially pure titanium

Title
Comparative study of the shear bond strength of various veneering materials on commercially pure titanium
Other Titles
순수 티타늄에 대한 열중합 의치상 레진, 간접 복합 레진과 도재의 결합강도에 관한 비교 연구
Authors
전슬기
Issue Date
2009
Department/Major
임상치의학대학원 임상치의학과보철수복치의학전공
Publisher
이화여자대학교 임상치의학대학원
Degree
Master
Advisors
박은진
Abstract
목적: 절삭형 티타늄 구조물을 이용한 보철물 제작에 많이 사용되는 열중합 의치상 레진, 도재, 간접 복합 레진의 순수 티타늄과의 결합 강도를 비교 평가하였다. 방법: 지름 9 mm, 높이 10 mm의 Grade II 순수 티타늄 (Grade Ⅱ commercially pure titanium; CP-Ti, Dynamet, Santa Fe Springs, CA, USA) 원통형 시편 30 개를 3 군으로 나누어 각각 직경 7 mm, 두께 2 mm의 열중합 의치상 레진 (Lucitone 199, Dentsply Trubyte, York, PA, USA), 간접 복합 레진 (Sinfony, 3M ESPE, Seefeld, Germany), 도재 (Triceram, Dentaurum, Ispringen, Germany)를 결합시켰다. 대조군으로 Type Ⅳ gold alloy를 직경 9 mm로 주조하여 열중합 의치상 레진 (Lucitone 199)과 결합시켰다. 시편은 5-55 ℃에서 5000회 열 순환 처리 후, 만능 시험기 (Instron 4465, Canton, Mass, USA)를 이용하여 1 mm/min의 속도로 하중을 가하여 결합강도를 측정하였다. 측정값은 Kruskal-Wallis Test와 Mann-Whitney Test (SPSS 15.0, SPSS Inc., Chicago, IL, USA)로 통계 처리하였으며, 유의수준은 P < .05로 하였다. 파절면은 광학현미경관찰 및 SEM 관찰하였다. 결과: 티타늄 군에 대한 실험결과에서는 Ti-Lucitone 199 (12.11 ± 4.44 MPa) 의 결합 강도가 가장 높았으며, Ti-Triceram (11.09 ± 1.66 MPa), Ti-Sinfony (4.32 ± 0.64 MPa) 순으로 감소하였다. 주조 금합금에 Lucitone 199을 결합시킨 대조군 (16.14 ± 1.89 MPa)에 비하면 낮은 수치이나 대조군과 Ti-Lucitone 199군, Ti-Lucitone 199 군과 Ti-Triceram 군의 차이는 통계학적으로 유의하지 않았다. 파절면의 관찰결과 실험군의 대부분은 부착성 파절 양상을 보였다. 결론: 절삭형 티타늄과 의치상용 레진, 티타늄 전용 도재의 결합은 임상적으로 허용 가능한 결합강도를 갖는다.;Purpose: The objective of this study is to evaluate the shear bond strength of three different veneering materials to commercially pure titanium (CP-Ti). Materials and Methods: The total number of specimens for the experimental and control groups were 40. Thirty specimens of CP-Ti disc with 9 mm diameter and 10 mm height were divided into three experimental groups. Each group was bonded to heat-polymerized acrylic resin (Lucitone 199), porcelain (Triceram), and indirect composite (Sinfony) with 7 mm diameter and 2 mm height according to the manufacturers’ recommendations. For the control group (n = 10), type Ⅳ gold alloy castings with 9 mm diameter and 10 mm height were used and heat-polymerized acrylic resins (Lucitone 199) were applied on those castings. All samples were thermocycled for 5000 cycles in 5 - 55 ˚C water. The maximum shear bond strength (MPa) was measured with a Universal Testing Machine (Instron 4465, Canton, Mass, USA) with cross head speed of 1 mm/min. After the shear bond strength test, the failure mode of the veneering material on metal was assessed with a scanning electron microscope (SEM). Statistical analysis of the results was carried out with a Kruskal-Wallis Test and Mann-Whitney Test at a significance level of 0.05. Results: The mean shear bond strength and standard deviations for experimental groups were as follows: Ti-Lucitone 199 (12.11 ± 4.44 MPa); Ti-Triceram (11.09 ± 1.66 MPa); Ti-Sinfony (4.32 ± 0.64 MPa). All of these experimental groups showed lower shear bond strength than the control group (16.14 ± 1.89 MPa). However, there was no statistically significant difference between the Ti-Lucitone 199 group and the control group, and the Ti-Lucitone 199 group and the Ti-Triceram group. Most of the failure patterns in all experimental groups were adhesive failures. Conclusions: The combinations of the casted gold alloy with Lucitone 199, titanium with Lucitone 199, and titanium with Triceram have shown the clinically acceptable shear bond strength.
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