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Updated: May 30, 2026

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
Published on: July 2, 2021
Arthrodiastasis of the hip
Gamal Ahmed Hosny1, Khamis El-Deeb, Mohamed Fadel
1Benha Faculty of Medicine, Cairo, Maadi, Egypt. gamalahosny@yahoo.com
Background:
Hip distraction in Legg-Calvé-Perthes disease unloads the joint, which negates the harmful effect of the stresses on the articular surface, which may promote the sound healing of the areas of necrosis.
Methods:
Nonarticulated arthrodiastasis without soft tissue release using an Ilizarov external fixator was applied to 29 patients with Legg-Calvé-Perthes disease (older than 8 y at onset and lateral pillar type C or B).
Results:
Follow-up period ranged from 2.5 to 11 years with an average of 7.5 years. Twenty-seven cases (93%) had improvement of the range of motion postoperatively. Preoperatively, all patients had constant pain, whereas at last follow-up 26 (86%) patients had no pain and 3 had an improvement. Stulberg classification was applied to 21 cases who reached skeletal maturity at last follow-up: 9 cases were type II, 7 cases were type III, 4 cases were type IV, and 1 case was type V.
Conclusions:
Nonarticulated hip distraction without soft tissue release seems to be a valid treatment option in cases with Legg-Calvé-Perthes disease where poor results are expected from conventional treatment.
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