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Clinical utility of a new functional splint made of thermoplastic knit material for thumb carpometacarpal osteoarthritis Shuichi Sasaki 1,2 , Kenji Onuma 3 , Tomonori Kenmoku 3 , Koji Sukegawa 3 , Masashi Takaso 3 , Naonobu Takahira 4 1Department of Rehabilitation, Kitasato University East Hospital 2Graduate Shool of Medical Sciences, Kitasato University 3Department of Orthopaedic Surgery, School of Medicine, Kitasato University 4School of Allied Health Sciences, Kitasato University Keyword: 装具 , スプリント , 母指 , 痛み , (母指CM関節症) , Orthotics , Splint , Thumb , Pain , Thumb carpometacarpal osteoarthritis pp.634-640
Published Date 2017/12/15
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 Splints for carpometacarpal (CM) joint osteoarthritis are designed to reduce joint inflammation by stabilizing both CM and MP joints. We have developed a new type of splint, the Kitasato Thumb Splint (KTS), which corrects the position of the CM joint while keeping the MP joint mobile. KTS is made of low-temperature thermoplastic material, and made by occupational therapists to correct dislocation and/or deformation of the CM joint. The KTS is unique in that it draws the first metacarpal bone toward radius, stabilizes the thumb in an abducted position, and does not fix proximal phalanges, allowing the MP joint to extend fully. To evaluate the effectiveness of KTS, two hands with CM joint osteoarthritis (Eaton stage I, III) were X-rayed to compare the thumb extension and pinch with and without KTS. Without KTS, subluxation of the CM joint and overextension of the MP joint were observed at the resting position, and subluxation was even worse at thumb abduction and pinch movement. However, with KTS, subluxation was corrected and the overextension of the MP joint decreased at the resting position, as well as during thumb flexion/extension and pinch movement. KTS was shown to be a unique orthosis allowing MP joint movement and correcting CM joint alignment even during movement.


Copyright © 2017, Japanese Association of Occupational Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 0289-4920 日本作業療法士協会

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