手腕處常見的過度性使用傷害有腕部隧道症候群、尺側副韌帶損傷、橈骨莖突狹窄性肌腱滑膜炎等等，手腕處也是在受外力衝擊時最常發生骨折的主要部位之一，臨床上依嚴重程度可能會施以外科復位手術後，以石膏護具包裹固定患部，期間會有悶熱與壓迫的副作用，嚴重者可能還會引發皮膚潰爛與腔室症候群。除了石膏護具外，近年來臨床上常用的熱塑板也是個治療性工具，有彎折後易破裂的問題，這類的護具雖能重複使用，但也有尺寸與使用者體型不完全相符的問題。
有鑑於現有腕護具在臨床使用的缺點，本文以維持石膏護具的良好固定性為前提，以使用者肢體的數位模型為設計基礎，提出一個可以提升護具透氣性、輕量化、易拆組、可再用、甚至可改變護具局部區域壓力的客製化積層腕護具，作為克服與解決上述問題的方法。為了設計並製造客製化腕護具，本研究建立了腕護具的設計程序，以手持式掃描機取得患部幾何後，透過設計軟體設計護具外型，並以積層製造客製化腕護具。以實驗量測特定部位護具與體表的壓力，觀察兩類型護具的固定效果，統計分析石膏護具與客製化腕護具在固定性上有顯著差異，裕度調整過的客製化腕護具與石膏護具的固定性無顯著差異，顯示積層腕護具的固定性與傳統石膏護具相當。另外在受試者的舒適度感受問卷中，反應出客製化腕護具普遍提供使用者更佳的使用體驗。

Injuries caused by overuse of the wrists and hands are common seen, such as carpal tunnel syndrome, skier's thumb, stenosing tenosynovitis of the malleolus radialis, etc. Wrists are also one of the most occurring fracture regions due to falling impact. According to the severity of injuries, fractures are usually treated by reduction surgery with afterward fixation by resin brace. Traditional brace may cause frowziness and pressure on skin in affected region, that sometimes initiate ulcerations and compartment syndrome. Apart from applying clinical fixation, thermoplastic splint is also one of the choices in clinical treatments in recent years. However, thermoplastic splint is easily broken because bended. Despite reuse, it can’t properly fit on user’s stature that may cause fixation failure. Therefore, the resin brace is a good choice for patients after surgery even it has many complications.
In view of the disadvantages of clinical wrist brace, we proposed a customized brace for wrist made by 3D printing machine in this study. In order to solve the problems mentioned above, the novel brace should be breathable, lightweight, easily dismantled, reusable and able to release pressures on some portions in wrist. In order to design and produce the customized wrist brace, this study has set up a brace design protocol. The procedure starts with scanning the affected portion to obtain its geometry, designs the digital model by the Brace software, fabricate the customized brace by additive manufacture. We then examined the pressure on the customized brace whether pressure on 6 region of interests are similar to traditional brace. Statistical outcomes show that the fixation of traditional and customized wrist brace is statistically significant and the stability of traditional and customized wrist brace with adjustable tolerance has not statistically significant. Moreover, we can conclude that customized wrist brace is better than traditional wrist brace from the questionnaire of users’ experience.

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