Optimal Location of Subtrochanteric Osteotomy in Total Hip Arthroplasty for Crowe Type IV Developmental Dysplasia of Hip

• DOI: 10.21203/rs.2.11746/v2
• Publication Date: 2019-12-16T17:03:28Z
• Authors: Zhe-Yu Huang; Hua Liu; Ming Li; Jing Ling; Jun-Hui Zhang; Zhi-Min Zeng
• Keywords: Lesser Trochanter; Hip Dysplasia; Greater trochanter

Abstract Background When reconstructing a hip with developmental dysplasia and high dislocation, sub-trochanteric shortening osteotomy is typically needed for placing the acetabular component in appropriate anatomical position. However, procedure can result complications such as non-union of osteotomy. We evaluated contact area coincidence rate between proximal distal fragments at different femoral levels lengths. then determined optimal location subtrochanteric transverse patients unilateral Crowe type IV (DDH). The consistency segments was assessed possible predictive indicator union site. Methods retrospectively reviewed 57 DDH who underwent X-ray imaging both joints. labelled inner outer diameters circular ring N (mm) M (mm), respectively. defined overlapped S (mm 2 ), ratio to R. Results varied from 9.8–15.2 mm 20.7–24 mm, demonstrated decreasing trend direction. At lengths ranging 0.5–2 cm, there were no differences each group. ≤ 2.5 significant higher noted cm below lesser trochanter other positions level. 3–5.5 significantly observed level 1.5 Conclusions Our findings suggest that predictably increase rate, which may contribute Considering stability prostheses, it appears should be shifted slightly distally.