Abstract:

To research the geometrimorph of patello-femoral joint and the geometric correlation between its components by imageological methods and provide theoretical basis for total knee prosthesis design.Methods  The geometrimorph of patello-femoral joint of 48 volunters was observed and measured on MRI images.Results The height of male patella was (41.87±4.67)mm;the width was (41.08±4.30)mm,while the height of female patella was (35.34±5.15)mm,the width was (36.71±3.07)mm.The proportion of unstable Chinese patella was 37.50%.The width of male distal femur was (80.70±6.40)mm,while it was  (70.64±8.70)mm in female. Moreover,the  female femur ditch and intercondylar fossa were far smaller than male. When the ratios of width and angle for the contact area were both larger than 1,knee joints bent highly and freely.
Conclusion  The  fine fitness of patello-femoral joint,the difference of knee joint morphorlogy between men and women,and arthroscopy for knee are very important in
design of total knee prosthesis.

Key words: patella;patello-femoral joint;total knee arthroplasty