矯正迷你骨釘用鋼材之表面處理-機械分析

Surface treatment of 316L stainless steel in the application of orthodontic miniscrews-Mechanical analysis

朱庭緯(Ting-Wei Chu)

指導教授 ： 林俊彬

國立臺灣大學/牙醫專業學院/臨床牙醫學研究所/碩士(2013年)

https://doi.org/10.6342/NTU.2013.02148

摘要

近年來隨著矯正領域中骨性錨定的盛行,各種針對矯正用迷你骨釘的幾何形 狀、材質或表面形貌的改質,皆曾被指出能改變迷你骨釘的臨床使用成功率。本 實驗選用俱有高機械強度的迷你骨釘不鏽鋼鋼材,希望藉由表面鍍一層具生物相 容性薄膜的改質技術,以提高其生物相容性與骨整合能力,進而提升臨床使用成 功率。
本實驗為求對各項機械性質測試能在較單純的情況下進行精確分析,因此是 選用與醫用不鏽鋼迷你骨釘相同材質的 316L 不鏽鋼板來進行表面鍍膜作業,希望 找出具最佳機械性質表現的鍍膜參數。本實驗的變數含以下四項:1.鍍膜材料,選 用鈦與二氧化鈦兩種。2.鍍膜方式,二氧化鈦薄膜以磁控濺鍍或溶膠凝膠法方式製 成,鈦薄膜以磁控濺鍍或電子束蒸鍍方式製作。3.鍍膜厚度,選擇比較的厚度範圍 為 30~500nm。4.表面粗糙度。
薄膜製成後,以場發射電子微探分析儀與X光繞射分析儀分析薄膜表面組成 與晶相,以場發射與掃瞄式電子顯微鏡觀察薄膜表面與截面,以彩色三維雷射掃 瞄儀分析薄膜表面粗糙度,並藉由刮痕測試機評估各種鍍膜參數下的薄膜附著性。
實驗結果顯示鈦薄膜可藉由以磁控濺鍍或電子束蒸鍍方式製作,但鈦薄膜於 316L 基板上的附著性極差,幾乎無法承受任何正向力與側向力。反之,二氧化鈦 薄膜無論以磁控濺鍍或溶膠凝膠法方式製成,其附著性都較鈦薄膜佳。另外,膜 厚與表面粗糙度確實會影響薄膜附著性,二氧化鈦薄膜附著性隨厚度增加而增 加,而基板表面粗糙度若增加,薄膜抗破裂(crack)能力會下降,但抗剝落(detachment) 能力會增加。

關鍵字

316L不鏽鋼矯正骨釘 ； 表面改質 ； 磁控濺鍍 ； 電子束蒸鍍 ； 溶膠凝膠法 ； 鈦 ； 二氧化鈦

並列摘要

In recent years, with the increased application of the orthodontic bony anchorage, it had been proposed to improve the clinical success rate of orthodontic mini-screws by a variety of modification of screw geometry, material or surface morphology. Our intention in this study was to modify the surface of stainless steel by surface coating of biocompatible films and improve the biocompatibility and the capability of bone integration.
The 316L stainless steel plates with the same composition of orthodontic stainless steel screws were used in this study to eliminate variables and simplify the mechanical testing conditions. The experimental variables were included as follow: 1. Coating materials. Titanium and titanium dioxide. 2. Coating methods. Magnetron sputtering or sol-gel method for titanium dioxide film. And magnetron sputtering or electron beam evaporation method for titanium film. 3 Coating thickness. With the range of 30 to 500 nm. 4. Surface roughness.
The composition and crystalline phase were analyzed by electron probe microanalyzer (EPMA) and X-ray diffraction analyzer (XRD). The surface and cross-section of films were examined by field emission scanning electron microscope. And the color three-dimensional laser scanning analyzer was used to calculate the surface roughness of films. Finally, the film adhesion under various coating parameters was evaluated by a scratch test machine.
The study results show that the titanium film could be made by the magnetron sputtering or the electron beam evaporation method. However, poor adhesion between the titanium coating and the substrate was noted by the scratch test. On the other hands, regardless of the coating methods by magnetron sputtering or sol-gel method, the
v
titanium dioxide film performed good adhesion properties. In addition, the film thickness and surface roughness does affect the property of film adhesion. The ability of spalling resistance was improved by increased coating thickness and by increased surface roughness. But the crack resistance property was weaken with increase of the surface roughness of films.

並列關鍵字

316L stainless steel orthodontic miniscrews ； surface modification ； magnetron sputtering ； electron beam evaporation ； Sol-gel method ； titanium ； titanium dioxide

參考文獻

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