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EFFECTS OF TITANIUM SURFACE COATING ON CERAMIC ADHESION
김연미, 이광민, 박상원, 이도재, 임현필, 김현승, 오계정, 서윤정,
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김연미 ( Kim Yeon-Mi ) - 전남대학교 치의학전문대학원 치과보철학교실
이광민 ( Lee Kwang-Min ) - 전남대학교 공과대학 신소재공학부
박상원 ( Park Sang-Won ) - 전남대학교 치의학전문대학원 치과보철학교실
이도재 ( Lee Doh-Jae ) - 전남대학교 공과대학 신소재공학부
임현필 ( Lim Hyun-Pil ) - 전남대학교 치의학전문대학원 치과보철학교실
김현승 ( Kim Hyun-Seung ) - 전남대학교 치의학전문대학원 치과보철학교실
오계정 ( Oh Gae-Jung ) - 전남대학교 치의학전문대학원 치과보철학교실
서윤정 ( Seo Yoon-Jung ) - 전남대학교 치의학전문대학원 치과보철학교실
KMID : 0362420070450050601
Abstract
Statement of Problem: The adhesion between titanium and ceramic is less optimal than conventional metal-ceramic bonding, due to reaction layer form on cast titanium surface during porcelain firing. Purpose: This study characterized the effect of titanium-ceramic adhesion after gold and TiN coating on cast and wrought titanium substrates.
Material and Method: Six groups of ASTM grade II commercially pure titanium and cast titanium specimens$(13mm{\times}13mm{\times}1mm)$ were prepared(n=8). The conventional Au-Pd-In alloy served as the control. All specimens were sandblasted with $110{\mu}m\;Al_2O_3$ particles and ultrasonically cleaned for 5min in deionized water and dried in air before porcelain firing. An ultra-low-fusing dental porcelain (Vita Titankeramik) was fused on titanium surfaces. Porcelain was debonded by a biaxial flexure test at a cross head speed of 0.25mm/min. The excellent titanium-ceramic adherence was exhibited by the presence of a dentin porcelain layer on the specimen surface after the biaxial flexure test. Area fraction of adherent porcelain (AFAP) was determined by SEM/EDS. Numerical results were statistically analyzed by one-way ANOVA and Student-Newman-Keuls test at ${\alpha}=0.05$.
Results:The AFAP value of cast titanium was greatest in the group 2 with TiN coating, followed by group 1 with Au coating and the group 3 with $Al_2O_3$ sandblasting. Significant statistical difference was found between the group 1, 2 and the group 3 (p<.05). The AFAP value of wrought titanium was greatest in the group 5 with TiN coating, followed by the group 4 with Au coating and the group 6 with $Al_2O_3$ sandblasting.
Conclusion:No significant difference was observed among the three groups (p>.05). The AFAP values of the cast titanium and the wrought titanium were similar. However the group treated with $Al_2O_3$ sandblasting showed significantly lower value (p<.05).
키워드
Titanium;Au and TiN Coating;Titanium-Ceramic Adhesion
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