積層製造(Additive Manufacturing, AM)因具有可以製造客製化外型、內部多孔結構以及適用少量多樣生產方式的三大特色,因此具有應用於醫療器材的潛力。本文的主要目的是簡要介紹牙科領域的金屬積層製造技術應用。希望可協助牙科行業熟悉金屬積層製造技術,並使其適應開發更多高價值的產品。金屬雷射積層製造技術因高度設計自由化的特性,可以快速且低成本方式進行客製化假牙製作。但金屬雷射積層製造技術屬於局部快速加熱快速冷卻的加工技術,因此會在成品中產生殘餘熱應力和變形,影響假牙貼合精度。這個問題通常使用經驗法則與試錯法進行參數設計與調整。近年來,工研院南分院致力於金屬積層製造設備與軟體的開發,以軟硬整合方式,可有效解決金屬積層製造牙材應用的殘餘應力和變形,透過技術創新提供更高品質的醫療牙科應用。
Additive manufacturing technology can build customized shape and inner three dimensional connective porous structure in small amount and variety production. This article takes removable partial dentures for example to explain the potential of additive manufacturing in dental application. The main purpose of this article is to give a brief introduction of the AM process simulation in the dental field. Hopefully, it can help the industries to get familiar with metal AM technology, and adapt it to develop more high-valued products. Metal additive manufacturing processes based on laser melting has been developed for quick fabrication of RPDs metal frameworks at low cost. But the metal laser additive manufacturing process involves a highly localized laser heating, resulting in a large thermal gradient that induces residual thermal stress and deformation in the finished build. So far this issue is usually resolved by designing an optimal support structure applying the rule-of-thumb and trial-and-error routine. In recent years, the Industrial Technology Research Institute has been committed to the development of metal Additive Manufacturing (AM) equipment and software. With the integration of software and hardware, the residual stress and deformation issue of metal AM can be effectively solved. And it can provide higher-quality medical and dental applications with technological innovation.