Journal
HIP INTERNATIONAL
Volume 32, Issue 3, Pages 345-352Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1120700020957990
Keywords
Arthroplasty; biomechanics; high hip dislocation; osteotomy
Categories
Ask authors/readers for more resources
The stability of different subtrochanteric osteotomy techniques was mechanically tested, and the oblique-45 degrees osteotomy showed the best stability when combined with subtrochanteric osteotomy. This technique may also promote bone healing by providing larger contact surfaces in the osteotomy lines.
Background: Subtrochanteric femoral shortening is used during total hip arthroplasty for high hip dislocation in developmental dysplasia of hip patients. Methods: We mechanically tested the stability of various commonly used subtrochanteric osteotomy techniques. As the equivalent of a femoral stem placed in a shortened femur without any stable fixation at the osteotomy line, 2 polyvinylchloride pipes were loosely intertwined. 4 different osteotomies (Z-subtrochanteric osteotomy, oblique-45 degrees osteotomy, double Chevron-90 degrees and 120 degrees subtrochanteric osteotomy) were simulated. Torsional and axial loads were applied, and torsional stiffness was calculated for each test model. Results: Z, double Chevron-90 degrees and 120 degrees subtrochanteric osteotomy models demonstrated lower mean torsional stiffness than oblique-45 degrees osteotomy. With the highest torsional stiffness oblique-45 degrees provides the best stability for treatment of high dislocation hips when a subtrochanteric osteotomy is added. Conclusions: This matches our previous clinical experience. Oblique osteotomy may also provide higher contact surfaces in the osteotomy lines to promote bone healing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available