Open Access Research article

The biomechanical differences of rotational acetabular osteotomy, Chiari osteotomy and shelf procedure in developmental dysplasia of hip

Ming Fu1*, Shanshan Xiang2, Zhiqi Zhang1*, Guangxin Huang1, Jin Liu1, Xin Duan1, Zibo Yang1, Peihui Wu1 and Weiming Liao1

Author Affiliations

1 Department of Joint Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China

2 Department of Orthopaedic Surgery, the Affiliated Jiangmen Hospital of Sun Yat-sen University, Jiangmen 529070, China

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BMC Musculoskeletal Disorders 2014, 15:47  doi:10.1186/1471-2474-15-47

Published: 21 February 2014

Abstract

Background

Rotational acetabular osteotomy (RAO), Chiari osteotomy and shelf procedure are important treatments to delay the progression of osteoarthritis in developmental dysplasia of hip (DDH) patients, but their biomechanical differences are still unknown. This study was to evaluate the different biomechanical changes of hip joint after these three surgeries.

Methods

Sixteen DDH models of 8 human cadaver specimens were reconstructed, and treated by different surgeries, and then strain around femoral head was evaluated by strain gauges.

Results

Hip strain value of DDH model was decreased after treated by shelf procedure (Pleft = 0.016 and Pright = 0.021) and rotational acetabular osteotomy (P = 0.004), but not in Chiari osteotomy (P = 0.856). Moreover, the improved ratio of RAO treatment was better than shelf procedure (P = 0.015) and Chiari osteotomy (P = 0.0007), and the descendent range of shelf procedure was greater than Chiari osteotomy (P = 0.018).

Conclusions

From biomechanics points, RAO was more effective in relieving hip joint stress compared with shelf procedure and Chiari osteotomy.

Keywords:
Rotational acetabular osteotomy; Chiari osteotomy; Shelf procedure; Hip stress