Radiographic calculation of anteversion in acetabular prostheses

The position of the acetabular prosthesis is critical for preventing dislocation following total hip arthroplasty. The reliability of a mathematical model for radiographically calculated acetabular cup version was examined. A porous-coated anatomic acetabular prosthesis was mounted in a mold. Antero...

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Bibliographic Details
Published in:The Journal of arthroplasty 1995-06, Vol.10 (3), p.369-372
Main Authors: Hassan, Douglas M., Johnston, Geoffrey H.F., Dust, William N.C., Watson, L. Glen, Cassidy, David
Format: Article
Language:English
Subjects:
acetabular anteversion
acetabular prosthesis
Acetabulum - anatomy & histology
Acetabulum - diagnostic imaging
dislocation
hip arthroplasty
Hip Prosthesis
Humans
Models, Theoretical
Observer Variation
radiographic calculation
Radiography
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Summary:The position of the acetabular prosthesis is critical for preventing dislocation following total hip arthroplasty. The reliability of a mathematical model for radiographically calculated acetabular cup version was examined. A porous-coated anatomic acetabular prosthesis was mounted in a mold. Anteroposterior radiographs were taken with the cup in five different positions of anteversion. These were reviewed by five orthopaedic surgeons, and measurements were taken from each radiograph. From these measurements, the mathematically derived degree of version was calculated. The results were examined for accuracy and intraobserver reliability. It was concluded that intraobserver reliability was very good and that the accuracy was within a clinically acceptable range. This technique could be useful in studying the “safe zone” for acetabular prostheses.
ISSN:0883-5403
1532-8406
DOI:10.1016/S0883-5403(05)80187-1