Thermal Oxidation Effect on Porcelain-Titanium Restoration

高溫氧化效應對陶瓷燒付鈦金屬的影響

洪純正(Chuen-Jeng Horng) ； 岡崎正之(Masayuki Okazaki) ； 高橋純造(Junzo Takahashi) ； 木村博(Hiroshi Kimura)

《The Kaohsiung Journal of Medical Sciences》 5卷9期 (1989/09) Pp. 522-528

https://doi.org/10.6452/KJMS.198909.0522

摘要

鈦金屬具備許多優點，譬如抗腐蝕性高、比重很輕、強度夠及良好的生物接受性。陶瓷燒付修復體因具良好美觀和強度而廣泛被使用，因此有些學者便將鈦金屬是否能運用於陶瓷燒付方面進行研究。本文的目的在探討鈦金屬經不同的高溫氧化後對陶村燒付強度及物理性質的!影。處理條件設於600至1000℃之間，分別於真空及空氣中進行。X光線繞射分析顯示α鈦之相對強度隨溫度的上升而逐漸降低；但二拼化鈦之相對強度則隨溫度的上升而顯著增加，尤其是800℃以上。鈦金屬的硬度也隨溫度之上升而增加，特別是超過900℃後。至於鈦與陶瓷的結合強度經萬能試驗機測試和金屬顯微鏡觀察發現未經高溫氧化的試片具有較好的結合強度及較薄的氧化層，而愈高溫處理後的試片則可能具有較厚的氧化層而使結合力顯著下降。故一般陶瓷燒付合金所作的“除氣”處理是不適用於鈦金屬系統。

並列摘要

Titanium has good corrosion resistance, light density, high stength and excellent biocompatibility. Conventional ceramicmetal restorations were used extensively in dentistry because of their esthetic appearance and good strength properties. The purpose of this study was to investigate the influence of various thermal treatments on the bond strength and physical properties of the porcelain-titanium system. Pure titanium was treated in a porcelain furnace at temperatures ranging from 600to 1000℃, under vacuum and in air, respectively. X-ray diffraction analysis revealed that the relative peak intensity of α-Ti was decreased, while the TiO2 was increased when raising the firing temperature. The Vickers hardness number was increased at elevated temperatures, especially over 900℃, and firing in air was harder than under vacuum. The tension-shear bond strength was highest in the green stage and lowest in the 1000℃treated group. The metallographic microscopic of the porcelaintitanium interface revealed a thick band-like zone in the 1000℃ treated sample. Therefore it seems that the excess oxidation layer of TiO2 weakened the bond strength of porcelain-titanium. Contrary to the conventional ceramic-gold alloys system, the recommended desassing procedure was not suitable for the porcelain-titanium restoration.

並列關鍵字

dental porcelain ； titanium ； X-ray diffraction