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자료유형
학술저널
저자정보
저널정보
대한의생명과학회 대한의생명과학회지 대한의생명과학회지 제14권 제2호
발행연도
2008.6
수록면
105 - 113 (9page)

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The objective of this study was to evaluate the influence of surface modifications on the bonding characteristics and cytotoxicity of specific titanium porcelain bonded to milling titanium and cast titanium. Milling titanium and cast titanium samples were divided into 8 test groups. These groups are as follow: i) sandblasted with particles of different size of 220 ㎛ and 50 ㎛, ii) different sequences of sandblasting treatment and etching treatment, iii) etched with different etching solutions, and iv) preheated or not. The surface characteristics of specimens were characterized by the test of mean roughness of surface and SEM. The bond strength of titanium-ceramic systems was measured by using three-point bending test and SEM. The results show that the mean roughness of surface of sample sandblasted with 220 ㎛ aluminum oxide increased and bond strength were higher than sample sandblasted with 50 ㎛ aluminum oxide. The mean roughness of surface decreased, but the bond strength increased when the samples sandblasted with 220 ㎛ aluminum oxide were preheated. The sample sandblasted with 220 ㎛ aluminum oxide after oxidized with occupational corrosive agent I (50% NaOH, 10% CuSO₄ㆍ5H₂O) and II (35% HNO₃, 5% HF) showed higher bond strength than sample oxidized with 30% HNO3 after sandblasted with 220 ㎛ aluminum oxide. Group NaCuNF220SP (milling Ti: 35.3985 ㎫, casting Ti: 37.2306 ㎫) which was treated with occupational corrosive agent I (50% NaOH, 10% CuSO₄ㆍ5H₂O) and II (35% HNO₃, 5% HF), followed by sandblasting with 220 ㎛ aluminum oxide and preheating at 750℃ for 1 hour showed the highest bond strength and significant differences (P<0.05). The method for modifying surface of titanium showed excellent stability of cells.

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