不同噴砂條件對氧化鋯基底全瓷系統的鍵結強度之影響

Effect of Different Sandblasting Conditions on Bond Strength of Zirconia Based All-Ceramic System

曾炫燁(Shiuan-Yeh Tzeng)

指導教授 ： 燕敏

中山醫學大學/口腔醫學院/口腔科學研究所/碩士(2014年)

https://doi.org/10.6834/CSMU.2014.00079

摘要

本研究目的是評估不同噴砂條件對於氧化鋯全陶瓷薄蓋冠與熱壓鑄陶瓷貼面間鍵結強度的影響。實驗使用氧化鋯作為全瓷冠之基底材料，白榴石陶瓷作為鑲面陶瓷。在氧化鋯表面進行不同粒徑及壓力下的噴砂處理，之後實驗組利用熱壓鑄式方法製作全陶瓷試片，並以傳統堆築式製作方式作為對照組。藉由剪切強度測試氧化鋯全陶瓷薄蓋冠與熱壓鑄陶瓷鑲面間的鍵結強度，並模擬口腔內環境對試片進行20000次的冷熱循環測試，再測試其剪切強度。利用SEM觀察其表面型態，分析試片的破斷模式。

研究結果顯示，噴砂粒徑與噴砂壓力顯著影響表面粗糙度（p < 0.05），較大的粒徑及噴砂壓力，會造成氧化鋯表面粗糙度明顯增大。經統計後發現，以堆築法成型的對照組比所有壓鑄組別的剪切強度都高（p < 0.05）。使用壓鑄法成型的組別中，剪切強度也受到噴砂粒徑及噴砂壓力的明顯影響（p < 0.05），以50 μm氧化鋁顆粒以3 bar壓力噴砂的剪切強度最佳，最低的則是以110 μm氧化鋁顆粒5 bar壓力噴砂。20000次的冷熱循環作用對各組試片的剪切強度並無顯著的影響（p > 0.05）。

結果證明，以50 μm氧化鋁顆粒3 bar壓力噴砂造成的氧化鋯表面粗糙度有利於氧化鋯與鑲面陶瓷間鍵結，而熱壓鑄式陶瓷的剪切強度有待改善。

關鍵字

全瓷冠 ； 氧化鋯 ； 熱壓鑄 ； 鍵結強度

並列摘要

The purpose of this study was to evaluate the effect of bond strength between the zirconia surface with different sandblast conditions and hot pressed ceramic. In experiment group, zirconia was used as the substructure of all-ceramic crown, and the leucite ceramic was used as veneering ceramics. Sandblasting with different particle sizes and pressures carried out on the surface of zirconia specimens and then the leucite ceramics were hot-pressed onto the zirconia surface of specimens in the experimental group. The specimens were produced with traditional build-up method as a control group. The bonding strength between zirconia and veneer ceramic with and without thermal cycling test were also measured by the shear bond test. The surface morphology and fractured mode of the specimens were observed by SEM.

Experimental results show that sandblast particle size and pressure significantly affect the surface roughness（p <0.05）, larger particle size and pressure, the zirconia’s surface roughness increased significantly. After statistical analysis, found that control group which formed with build – up method has higher shear strength then all hot pressed formed groups（p <0.05）. The groups of hot pressed, the shear strength is also significantly affected by particle size and sandblasting pressure（p <0.05）, blasting with 50 μm alumina particles in blasting pressure of 3 bar has the highest shear strength, and blasting with alumina 110 μm particles in 5 bar pressure has the lowest shear strength. 20,000 times thermal cycling has no significant effects for the shear strength in each group（p > 0.05）.

The results proved that the surface roughness caused by 50 μm alumina particles in 3 bar blasting pressure is beneficial to the bond strength between zirconia and veneer, and the hot pressed ceramic’s shear bond requires improvement.

並列關鍵字

all-ceramic crowns ； zirconia ； hot press ； bond strength

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