Parameters of unimplanted and explanted surfaces of Weller endoprosthesis stems.

40 samples of stem surfaces of the Weller endoprosthesis of hip joint removed because of aseptic loosening were tested. The patients between the ages of 61 and 87 were examined and the exploitation time of endoprosthesis ranged from 1 to 20 years. The material analysed was as follows: I group - exploitation 1-3 years (5 surfaces), II group - exploitation 5-8 years (11 surfaces), III group - exploitation 10-14 years (14 surfaces), and IV group - exploitation 16-20 years (10 surfaces).

[Early abductor muscle strength after total hip replacement performed by antero-lateral approach].

Between November 2000 and April 2001 31 patients with unilateral coxarthrosis were assessed in order to determine strength of the hip abductors and hip mobility 2 days prior surgery, 10 and 14 days post surgery. All patients underwent total hip replacement though an antero-lateral approach. It was found that maximal and average muscle strength decreased during the first 2 weeks post-op, with concomitant increase in time needed to achieve full muscle strength and hip mobility.