鈦金屬由於具有高強度、優良的抗腐蝕性及生物相容性等優點，近年來在牙科方面已被廣泛的應用。但由於鈦金屬在高溫極易氧化，而形成過厚易脫落的的氧化層，使得鈦金屬在燒附陶瓷上仍面臨許多問題。
實驗中採用不同表面處理之鈦基材和ZrO2介層的有無作為變數，以觀察鍵結強度的改變。
比較經不同表面處理之鈦基材，實驗結果顯示酸蝕處理會降低所殘留的雜質含量，且塗層強度略微增加。
利用電漿熔射ZrO2作為介層，並藉由4點抗彎測試塗層的鍵結強度，比較PZT塗層（porcelain/Zirconia/titanium）與PT塗層（porcelain/titanium），PZT塗層的強度明顯高於PT塗層強度，顯示ZrO2的韌化性質和所提供的較高表面粗糙度會明顯強化塗層的鍵結強度。
利用SEM/EDS、thin-film XRD分析破壞表面，發現PZT塗層破壞主要為porcelain的內聚破壞，而PT塗層則是沿著鈦基材與porcelain的界面處，顯示界面處為塗層產生破壞時的脆弱位置。

Owing to the material’s properties such as high strength, corrosion resistance, and biocompatibility, titanium becomes accepted in dental applications in recent years. Since titanium is easily oxidized at high temperature and a thick oxidation layer could form quickly on the surface, there are still a lot of problems with firing porcelain on the material.In this study, two different Ti surface treatments with and without a ZrO2 bond coat were varied to observe the change of bonding strength of the porcelain coating on titanium.
The surface of Ti was treated by two different ways (sandblasting and acid-etching). The bond strength was calculated by fracture loads in 4-point bending test. The result shows that, after acid-etching treating, the titanium surface may reduce the amount of impurity and will increase the bonding strength. Plasma-sprayed ZrO2 coating was used as bond coat between porcelain and Ti substrate. The bonding strength of PZT（porcelain/ZrO2/titanium）was found significantly higher than PT（porcelain/titanium）.The rationale of the improvement by introducing the intermediate ZrO2 layer was explained. SEM/EDS and thin-film XRD analyses was used to observe the fracture surface. It was found that the fracture of PZT mainly occur at porcelain, and the fracture of PT mainly occur at porcelain and Ti interface. These results indicate the interface was the weakest point in the coating.

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