The Journal of Bone and Joint Surgery, Vol 59, Issue 7 948-953, Copyright © 1977 by Journal of Bone and Joint Surgery, Inc
Roentgenographic measurements after Muller total hip replacement. Correlations among roentgenographic measurements and hip strength and mobility
DR Gore, MP Murray, GM Gardner and SB Sepic
In fifty-two patients with Muller total hip replacement, roentgenographic
measurements of prosthetic component positioning were correlated with
hip-muscle strength and mobility measurements. Compared with the normal
side, the average position of the center of the prosthetic head was more
medial and superior in the pelvis, and the greater trochanter was more
distal and lateral. Increasing neck length (distance from the center of the
prosthetic head to the lesser trochanter) and a more distal position of the
greater trochanter were among the measurements that related favorably to
measurements of patient function. More superior placement of the center of
the prosthetic head in the pelvis was associated with a more superior
position of the lesser trochanter, which related adversely to function.