EXPERIMENTAL STUDY ON BIOMECHANiCS OF THE PATELLOFEMORAL JOINT
- VernacularTitle:骨宾股关节的生物力学实验研究
- Author:
Weijiang ZHOU
- Publication Type:Journal Article
- Keywords:
patella biomechanics
- From:
Academic Journal of Second Military Medical University
1982;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Eight specimens of the knee were used to determine quadriceps force (FQ) required to stabilize the knee under load in a flexed stance.It was found that there was a positive relationship between quadriceps force and the weight and flexion of the knee .At flexion of 15? FQ was about the same as the weight; at 45?,about 3-4 times the weight.FQ increased by 10-40% after patele ctomy, while anterior displacement of the tibial tubercle by 1.5cm led to 11%-19% decrease because of its pro- longed lever arm. It widened the angle formed by the qudriceps tendon and the patellar tendon by an average of 10.7 degrees.The contact areas of the patellofemoral joint at flexion of 0-135 ? were determined by contact prints.Following anterior displacement of the tibial turbercle, contact areas were upwardly shifted and enlarged.Our results show that this procedure can decrease the patellofemoral contact stress by lengthening the lever arm of FQ, widening the angle formed by the guad-riceps tendon and patellar tendon and enlarging contact areas of the patellofemoral joint. We recommend it as a possible satisfactory treatment for the patellofemoral joint disorders
