| 摘要 |
PROBLEM TO BE SOLVED: To provide a tibia tray having an adjustable keel part. SOLUTION: A tibia prosthesis 10 has a tibia platform which has a central part in a transverse direction of a center engageable with the tibia on an excised proximal position and a rear surface part, and a module keep part 14 which is fixable to the rear surface part and is adjustable in the transverse direction of the center with respect to the central part in the transverse direction of the center of this tibia platform.
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