Evaluation of the hip center in total hip arthroplasty for old developmental dysplasia.
We describe the problems with positioning the hip center according to the severity of dislocation in 97 cementless total hip arthroplasty for developmental dysplasia of the hip. The mean location of the hip center from the interteardrop was 30.4 +/- 8.7 mm horizontally and 23.4 +/- 5.4 mm vertically. The presence of a limp correlated with a superior placement of the cup. Four cups were revised, 2 of which with a significant high hip center. The survival rate of the acetabular component was 95% at 12 years. Craniopodal repositioning was easy in class 1. In class 2, the cup was the largest. In class 3, the greatest variations of the hip center were found. In class 4, the smallest implants were necessary for positioning in the true acetabulum.
Department of Orthopedic Surgery, Hospital Sainte Marguerite, Aix-Marseille University, Marseille, France.
Xavier
X
Flecher
Sebastien
S
Parratte
Nicolas
N
Brassart
Jean-Manuel
JM
Aubaniac
Jean-Noël
JN
Argenson
D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000503:physiopathology / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D008875:Middle Aged; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology; D012189:Retrospective Studies; D016019:Survival Analysis; D055815:Young Adult