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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 8, 1176-1181.
doi: 10.1302/0301-620X.86B8.14458  
Copyright © 2004 by British Editorial Society of Bone and Joint Surgery
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A paired study of Perthes’ disease comparing conservative and surgical treatment

M. Kamegaya, MD, Chief Staff Surgeon1; T. Saisu, MD, Staff Surgeon1; N. Ochiai, MD, Resident1; J. Hisamitsu, MD, Resident2; and H. Moriya, MD, Professor2

1 Division of Orthopaedic Surgery, Chiba Children’s Hospital, 579-1 Heta-chou, Chiba City 266-0007, Chiba, Japan.
2 Department of Orthopaedic Surgery, Chiba University, School of Medicine, 1-8-1, Inohana, Chuo-ku, Chiba City 260-0856, Chiba, Japan.

Correspondence should be sent to Dr M. Kamegaya.

We performed a paired study of mature patients with Perthes’ disease to compare the radiological results after treatment between conservatively- and surgically-treated groups. One patient was selected from each group to create the pairs for this study. Each pair was strictly matched for gender, body mass index, age at onset, stage at the first visit, necrotic area and radiological at-risk signs and each was assessed by comparing the values of six radiological measurements.

Eighteen pairs (36 hips) fitted the criteria. The radiological measurements which showed a statistically better result in the surgical groups were Mose’s method, the acetabular-head index and leg-length discrepancy. There were no statistical differences in the slope of the acetabular roof and the articulotrochanteric distance. Four hips in the conservative group were in Stulberg class II, five in class III and nine in class IV. In the surgical group, 13 were in Stulberg class II, four in class III and one in class IV.

We conclude that surgical treatment improved the sphericity of the femoral head and provided greater acetabular cover, but did not reform the acetabular roof.

It was noteworthy that a greater leg-length discrepancy and a smaller articulotrochanteric distance were not seen in the surgical group. Our study suggests that surgical treatment is preferable in patients with severe Perthes’ disease.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General