타이타늄의 표면개질에 따른 도재 결합 특성
THE BOND CHARACTERISTICS OF PORCELAIN FUSED BY TITANIUM SURFACE MODIFICATION
최택휴, 이광민, 박상원, 양홍소, 방몽숙, 박하옥, 임현필, 김현승, 오계정, 이경구,
소속 상세정보
최택휴 ( Choi Taek-Hyu ) - 전남대학교 치의학전문대학원 치과보철학교실
이광민 ( Lee Kwang-Min ) - 전남대학교 공과대학 신소재공학부
박상원 ( Park Sang-Won ) - 전남대학교 치의학전문대학원 치과보철학교실
양홍소 ( Yang Hong-So ) - 전남대학교 치의학전문대학원 치과보철학교실
방몽숙 ( Vang Mong-Sook ) - 전남대학교 치의학전문대학원 치과보철학교실
박하옥 ( Park Ha-Ok ) - 전남대학교 치의학전문대학원 치과보철학교실
임현필 ( Lim Hyun-Pil ) - 전남대학교 치의학전문대학원 치과보철학교실
김현승 ( Kim Hyun-Seung ) - 전남대학교 치의학전문대학원 치과보철학교실
오계정 ( Oh Gae-Jung ) - 전남대학교 치의학전문대학원 치과보철학교실
이경구 ( Lee Kyung-Gu ) - 타이타늄 특수합금부품개발지원센터
KMID : 0362420070450020169
Abstract
Statement of problem: Titanium is well known as a proper metal for the dental restorations, because it has an excellent biocompatibility, resistance to corrosion, and mechanical property. However, adhesion between titanium and dental porcelains is related to the diffusion of oxygen to the reaction layers formed on cast-titanium surfaces during porcelain firing and those oxidized layers make the adhesion difficult to be formed. Many studies using mechanical, chemical and physical methods to enhance the titanium-ceramic adhesion have been actively performed.
Purpose: This study meant to comparatively analyse the adhesion characteristics depending on different titanium surface coatings after coating the casts and wrought titanium surfaces with Au and TiN.
Material and method: In this study, the titanium specimens (CP-Ti, Grade 2, Kobe still Co. Japan) were categorized into cast and wrought titanium. The wrought titanium was cast by using the MgO-based investment(Selevest CB, Selec). The cast and wrought titanium were treated with Au coating(ParaOne^{(R)}., Gold Ion Sputter, Model PS-1200) and TiN coating(ATEC system, Korea) and the ultra low fusing dental porcelain was fused and fired onto the samples. Biaxial flection test was done on the fired samples and the porcelain was separated. The adhesion characteristics of porcelain and titanium after firing and the specimen surfaces before and after the porcelain fracture test were observed with SEM. The atomic percent of Si on all sample surfaces was comparatively analysed by EDS. In addition, the constituents of specimen surface layers after the porcelain fracture and the formed compound were evaluated by X-ray diffraction diagnosis.
Result: The results of this study were obtained as follows : 1. The surface characteristics of cast and wrought titanium after surface treatment(Au, TiN, Al_2O_3 sandblasting) were similar and each cast and wrought titanium showed similar bonding characteristics. 2. Before and after the biaxial flection test, the highest atomic weight change of Si component was found in Al_2O_3 sandblasted wrought titanium(28.6at.% rightarrow 8.3at.%). On the other hand, the least change was seen in Au-Pd-In alloy(24.5at.% rightarrow 9.1at.%). 3. Much amount of Si components was uniformly distributed in Au and TiN coated titanium, but less amount of Si’’s was unevenly dispersed on Al2O3 sandblasting surfaces. 4. In X-ray diffraction diagnosis after porcelain debonding, we could see Au_2T compound and TiN coating layers on Au and TiN coated surfaces and TiO_2, typical oxide of titanium, on all titanium surfaces. 5. Debonding of porcelain on cast and wrought titanium surface after the biaxial flection is considered as a result of adhesion deterioration between coating layers and titanium surfaces. We found that there are both adhesive failure and cohesive failure at the same time.
Conclusion: These results showed that the titanium-ceramic adhesion could be improved by coating cast and wrought titanium surfaces with Au and TiN when making porcelain fused to metal crowns. In order to use porcelain fused to titanium clinically, it is considered that coating technique to enhance the bonding strength between coating kKlayers and titanium surfaces should be developed first.
키워드
Titanium;Surface treatment(Au; TiN; Al_2O_3 sandblasting);Adhesion
원문 및 링크아웃 정보
등재저널 정보