SHORT TERM RESULTS OF GENESIS2 TKA WITH HI-FLEX INSERT IN JAPANESE LIFE STYLE

Abstract

Hi-flex insert was developed in part for the needs of Asian and Islamic people’s life style, because of the traditional floor sitting style in a daily life. We studied about the short term results of Genesis2 with Hi-flex insert in Japanese life style for 57knees in 39patients that were passed more than 2 years post-operation between 2004 and 2006. The mean age at implantation was 72.1. From the patients reviewed the mean pre-operative Japanese Orthopaedic Association score was 51, compared to 81 at last follow up. The mean pre-operative flexion was 113, compared to 124 at last follow up. Almost all patients had changed their life style basically from Japanese (floor sitting) to Western (chair sitting) before operation because of their knee problems. But 30% of the patients sometimes wanted to sit on the floor traditionally before the operation, and 83% of these patients can sit also after the operation. Japanese traditional life styles with the knee flexed deeply can be achieved by Genesis2 with Hi-flex insert satisfactorily limited to the patients who could do also before the operation. But when the patients sit on the floor, the complicated stress to the implants and insert were unknown. At the present time, we must advice to the patients who can sit on the floor about the motion that can reduce the stress to the implants and insert.