[Bioelectric activity of the gluteus medius muscle after total McKee-Farrar hip replacement]. / Czynnosc bioelektryczna miesnia posladkowego sredniego po calkowitej endoprotezoplastyce sposobem Mc Kee Farrar'a.

Electromyography of the gluteus medius muscle in arthritic patients after total McKee-Farrar hip replacement has been presented. The control group consisted of nonoperated arthritic hips and normal hips. It was found that arthritis of the hip or total hip replacement do not significantly influence the average score of the integrated gluteus medius electomyogram. The gluteus medius strength on Trendelenburg sign testing is 1.5-2 times greater than on acting against maximal resistance with patient in supine position.

[Evaluation of the hip joint after Kee-Farrar total hip arthroplasty from the aspect of certain clinical biomechanical criteria]. / Ocena stawu biodrowego po calkowitej plastyce endoproteza Mc Kee Farrar'a w aspekcie niektórych kryteriow biomechaniki klinicznej.

Hundred hips in 84 arthritic patients after Mc Kee-Farrar total hip arthroplasty were reviewed. Biomechanical measurements in operated, arthritic non-operated and normal hips were compared. The moment of adductive forces, adductive forces, the strength of abductors, Hamacher-Roesler index and Wozny coefficient were determined. In nonoperated arthritic hips these measurements were abnormal. They were close to normal values in operated hips with negative Trendelenburg sign.