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International Orthopaedics
Published in: International Orthopaedics 6/2018

01-06-2018 | Original Paper

Morphological variation of the anterior inferior iliac spine affects hip range of motion in flexion after rotational acetabular osteotomy

Authors: Hidetoshi Hamada, Masaki Takao, Takashi Sakai, Nobuhiko Sugano

Published in: International Orthopaedics | Issue 6/2018

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Abstract

Purpose

Reduced range of motion (ROM) in flexion and internal rotation are associated with impaired activities of daily living (ADL) after rotational acetabular osteotomy (RAO). This study focused on the morphological variation of the anterior inferior iliac spine in developmental dysplasia of the hip (DDH) and its impact on post-operative bony ROM after RAO. This study aimed to investigate the association between bony ROM after RAO and pre-operative morphological factors of the pelvis and femur, including a positional variation of the anterior inferior iliac spine.

Methods

Bony ROM in 52 patients with DDH was assessed after virtual RAO using computed tomography (CT). Post-operative acetabular coverage was set at lateral and anterior centre-edge angles of 30° and 55°, respectively. The position of the anterior inferior iliac spine was classified as higher or lower.

Results

Multiple regression analysis revealed that the lower anterior inferior iliac spine and higher femoral neck shaft angle were significantly associated with the lower flexion angle after RAO. Lower femoral anteversion, higher femoral neck shaft angle and higher alpha angle at the anterosuperior part were significantly associated with lower internal rotation angle at 90° flexion after RAO.

Conclusion

Therefore, morphological variation of the anterior inferior iliac spine affected bony ROM in flexion and that of the femoral neck affected bony ROM in internal rotation at flexion after RAO.
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Metadata
Title
Morphological variation of the anterior inferior iliac spine affects hip range of motion in flexion after rotational acetabular osteotomy
Authors
Hidetoshi Hamada
Masaki Takao
Takashi Sakai
Nobuhiko Sugano
Publication date
01-06-2018
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 6/2018
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-017-3673-1

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