塑膠植牙扭力扳手設計與開發

Development of Plastic Torque Wrench for Dental Implant

張耀鴻(Yao-Hung Zhang)

指導教授 ： 林忠志

國立虎尾科技大學/工程學院/機械與電腦輔助工程系碩士班/碩士(2014年)

https://doi.org/10.6827/NFU.2014.00077

摘要

塑膠產品的應用雖有先天上限制，但是在某些場合塑膠產品卻有它的優勢，本研究將開發以塑膠材料為主的植牙用扭力扳手(Plastic Torque Wrench for Dental Implant)提供在目前幾乎是金屬扳手市場之外的另一選擇。人工植牙過程中在醫師將病患口腔內組織及骨膜切開之後，會使用植牙機在骨膜部位修出凹槽；再將修好的凹槽刻出螺紋接著將人工牙根鎖入凹槽。通常鎖緊人工牙根的扭力值約為30N-cm~ 70N-cm，並不是很高，依患者狀況而設定。對使用金屬材質製作的扭力扳手而言，扳手的尺寸要做的比較細（約為2mm），否則容易因為剛性太大，無法提供較大的操作角度可以在15N-cm~80N-cm 之間操作而造成辨識度下降。塑膠材料的楊氏係數約為金屬材質的10-3~10-4 之間，且可以透過填充材(Filler)再做局部調整，相對金屬材質而言屬於較軟的材料，可以提供操作者較大的操作角度，此外塑膠扭力扳手尚有重量較輕的優勢。
本研究規劃出塑膠植牙扭力扳手設計流程，給予設計扳手所需的條件，並運用材料力學計算出主要影響整支扳手位移量的區域所需的截面尺寸，並利用所計算出的截面尺寸繪出扳手大略外型，再透過樸最佳化分析給予設計目標，進行拓樸最佳化分析並與設計目標做比較，選出最接近設計目標的扳手並做驗證分析，驗證後將拓樸最佳化圖型重繪並做出成品。

關鍵字

結構形狀設計 ； 塑膠植牙用扭力扳手 ； 射出成形

並列摘要

Comparing with metal materials, the applications of plastic materials are constrained due to that their mechanical properties are usually more compliant than those of metal materials. However, plastic material still performs its advantages in certain topics. In this study, a methodology for developing the torque wrench for dental implant using plastic material is proposed due to that plastic material is more suitable for design. A dentist uses torque wrench to fasten the dental implant into the bone with designate moment. The moment for dental implant is small and the range of them is between 30N-cm to 70N-cm, which is not so large in industry. Traditionally, torque wrenches for dental implant are made of metal materials and the diameter of operating rod of the wrench is slender for an apparent identification. The more of the deflection of the rod has, the better of the resolution is. In general, if the diameter of operating rod is larger than 2mm, the rigidity of the operating rod will be too high to identify the index on the rule of torque wrench. The Young’s modulus of plastic material is only 10-3~10-4 times of those of metal materials and is a good candidate for torque wrench design.
The research planning of the plastic implant torque wrench design flow, given the conditions needed wrench design and theory of material Mechanics in to calculate the cross-sectional dimension required major affect wrench displacement amount entire region, and using of the calculated cross-sectional dimension drawn a wrench roughly shaped, then give the best analysis through design goals Pak conducted topology optimization analysis and to compare with the design goals, choose the closest wrench and design goals for validation analysis, validation will topology optimization of graphics redraw and make the finished product.

並列關鍵字

Structural shape design ； Plastic torque wrench ； Injection molding

參考文獻

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