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Acetabular anteversion angle from early stage of Perthes disease to adolescence
Takashi Yoshida1, Wook-Cheol Kim1, Atsushi Nishida1
1Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Objective:
This study aimed to assess acetabular anteversion angle (AAA) from the early stage of Perthes disease to adolescence.
Methods:
Twenty-five patients treated conservatively were examined. Changes in AAA from initial to final measurement were compared between the two groups (G-group: Stulberg classes I and II; P-group: classes III and IV).
Results:
In the G-group, AAA decreased significantly in the affected hip compared with the unaffected hip, whereas AAA decreased in both hips in the P-group.
Conclusion:
Acetabular retroversion may occur only in the affected hip or in both hips; in the latter case, the treatment outcome may be poor.
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