五軸數位齒雕機對生醫氧化鋯牙冠之切削特性評估

Evaluation of machinability on the biomedical zirconia crown by a five-axis CNC denture engraving machine

程冠中(Kuan-Chung Cheng)

指導教授 ： 施永勳

臺北醫學大學/口腔醫學院/醫療器材產業碩士專班/碩士(2015年)

https://doi.org/10.6831/TMU.2015.00005

摘要

本研究主要藉由電子顯微鏡、X光繞射儀、硬度測試、接觸角測試與拉曼光譜儀等分析儀器，針對五軸數位齒雕機對生醫氧化鋯牙冠之切削特性進行評估研究。分析研究結果顯示；約100 μm大小之類層狀切屑被觀察到經由連續切削30顆氧化鋯牙冠後。此外，一些明顯的切屑亦會開始貼附殘留於車針表面在連續切削20顆氧化鋯牙冠後，而較大顆的切屑則會在切削70顆氧化鋯牙冠後之車針表面形成。當切削氧化鋯牙冠從10顆至70顆時，氧化鋯牙冠表面形貌沒有太大變化。而表面粗糙度則會隨著切削量的增加而增加。X光繞射儀分析指出切削後之氧化鋯牙冠表面結構為單一?悇菕A無其他析出物可被偵測到於切屑中。當切削氧化鋯牙冠從10顆至70顆時，表面硬度亦隨之增加。切削後之氧化鋯牙冠表面呈現高疏水性特徵。

關鍵字

生醫氧化鋯 ； 顯微結構 ； 牙冠 ； 切削性

並列摘要

The machinability properties on the biomedical zirconia crown by a five-axis CNC denture engraving machine were investigated by electron microscopy, X-Ray diffraction, hardness testing and contact angle testing. The analytical results indicated that the layer-like scraps around 100 μm were observed in the milled scrap when continuously milling to zirconia crown to number 30. Moreover, some obvious scrap starting to adhesion on the bur as continuously to milling 20 zirconia crowns. The bigger scraps were formed on the bur after milled with 70 zirconia crowns. No significantly change on the surface morphology of the zirconia crown after continuous milling from 10 to 70. The surface roughness of the milled zirconia crown increased with the milling amounts. X-ray indicates that the entire milled zirconia crown samples are typical of the structure of ?? phase. No precipitates were found within the scraps. The hardness of the milled zirconia crown samples increased with increasing the amounts from 10 to 70. The milled zirconia crowns were possessed the relatively higher hydrophilicity surfaces.

並列關鍵字

Biomedical zirconia ； Microstructure ； Dental crown ； Machinability

參考文獻

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