Abstract:

BACKGROUND: Most of knee replacement prosthesis is designed for male, which differs from female in physiological and anatomical characteristics. Clinical anatomy showed that, the shape of knee joints has great differences between males and females, especially in patellofemoral joint. Accordingly, compared with males, the complications in females following knee replacement are greater.
OBJECTIVE: To observe the function and range of motion of knee joint after “female knee” replacement, and to analyze the design features of “female knee” in dealing with patellofemoral joint.
METHODS: Totally 11 (13 knees) female cases who suffered from knee osteoarthritis and were treated by “female knee” replacement (Jianda, Zimmer Cooperation, USA) were selected. The ages of cases were 61-81 yearsold, and 2 cases suffered form both knee osteoarthritis. All knees had flexion or inversion deformity. The function and range of motion of knee joints were compared before and after “female knee” replacement. The hospital for special surgery (HSS) knee rating scale was used to evaluate knee functions. The full score of HSS was 100, over 85 were excellent, 70-84 were good, 60-69 were fair and lower than 60 were poor. 
RESULTS AND CONCLUSION: Compared with before replacement, the HSS scores of knee joints were increased (P < 0.01), and the range of motion was greater in all cases at 12 weeks after replacement (P < 0.01). The strength and stability of knee were increased, which could meet the needs of daily life and increase living standard of patients. Results demonstrated that the design of “female knee” is identical to anatomical characteristics of Arian females, which can achieve good therapeutic effects in clinical application.