Author's Organization:the Orthopedic Department of Kyoto Prefectural Medical University the Orthopedic Department of Kyoto Prefectural Medical University the Orthopedic Department of Kyoto Prefectural Medical University the Orthopedic Department of Kyoto Prefectural Medical University the Orthopedic Department of Kyoto Prefectural Medical University the Orthopedic Department of Kyoto Prefectural Medical University