3D技術を使用した手指切断に対する訓練用仮義手の作製の実際（5症例）

Producing temporary hand prosthetics for amputated digits using 3D technology: A multi-case study

要旨：近年，3D技術を使用して手指切断者に対する訓練用仮義手の作製方法が考案された．本報告の目的は，その方法をさまざまな切断部位や指数で実践して作製方法を検証し，熱可塑性樹脂で作製した訓練用仮義手と実用性を比較することとした．対象者は，既に早期義肢装着法の治療を終えた5名の手指切断者であった．3Dプリンタで作製した訓練用仮義手を装着させて簡易上肢機能検査等を行った．結果は実用性に大差はなかったが，3Dプリンタで作製した訓練用仮義手の装飾性の改善には作業手順の変更が必要と考えられた．また，3Dプリンタで作製する利点は症例の負担が少ないことで，欠点は強度面の対策が必要なことであった.

　Recently, a new method has been devised for making temporary hand prostheses for amputated fingers using 3D technology. This report aimed to verify the fabrication method through comparing its practicality with a temporary training prosthesis made from thermoplastic resin. Subjects were 5 amputees of fingers who had previously completed treatment of an early prosthesis fitting method. The Simple Test for Evaluating Hand Function was performed by making the subjects wear temporary hand training prosthetics made with a 3D printer. The results indicated little difference in practicality between the two methods, but it was found to be necessary to change the work procedure to improve the decorative surface of the temporary hand prosthesis made with the 3D printer. Furthermore, a 3D printer is advantageous due to its limited burden on the patient. However, the disadvantage is the need to take measures in terms of maintaining and improving finger strength.