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Carpo-metacarpal/metacarpo-phalangeal (CMC/MCP) joint orthoses designed to make possible and/or improve the functional activities of the thumb joints during common daily activities. They also facilitate active thumb use and normal functional use of the hand. These orthoses typically consist of semi-rigid devices that may place the thumb in the abducted position, opposed to the fingers. Functional CMC/MCP orthoses are used mainly during daily activities to improve functional use of the hand and/or to reduce pain after injuries; the orthoses may be also used to prevent thumb deformities (e.g., swan-neck and/or boutonniere types) in arthritis patients. Dedicated functional CMC/MCP orthoses, such as thumb spica orthoses, are available.
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