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| MRI evaluation of Dega osteotomy in the treatment of developmental dislocation of the hip in children |
| GE Wei1, MENG Yan1, LU Zhao1, BEI Gui-guang2, PAN Shi-nong1 |
| 1. Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China;
2. Department of Radiology, Northern Theater General Hospital(Heping Branch), Shenyang 110003, China |
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Abstract Objective: A follow-up was performed to make the radiological evaluation after Dega osteotomy in developmental dysplasia of the hip(DDH) in children. The postoperative developmental characteristics of the hip were observed and the relationship of short-term efficacy, radiographic indicators and operative age was analyzed. Methods: Thirty-eight untreated patients included 46 dislocation hips(5 boys and 33 girls; age range from 13 months to 72 months; mean age 25.2 months) were diagnosed with DDH. Those patients include 19 in left, 11 in right and 8 bilateral; in total was 38. All the dislocation hips were divided into A and B groups, the age of group A was less than two years old, the age of group B was equal or greater than two years old. Results: The difference of all the parameters preoperative and postoperative between the dislocation hip and the normal side had statistical significance(P<0.01). The difference of acetabular index(AI) and bone acetabular index(BAI) respectively compared with that of cartilage acetabular index(CAI) had significant statistical significance(P<0.01), but the difference between AI and BAI had no statistical significance(P>0.05). The data was divided into 2 groups(group A and group B), comparison of group A and group B before operation, the parameters of AI, BAI and CAI had statistical significance(P<0.01). Comparison of group A and group B after operation, the parameters of AI and BAI had no statistical significance(P>0.05), the parameter of CAI had statistical significance(P<0.01). The differences between preoperative parameters and the postoperative parameters were negatively correlated with age. Conclusions: The change of CAI could reflect the change of acetabulum more sensitively compared with that of BAI in the short term after Dega osteotomy operation, which suggests the change of CAI could reveal the improvement of acetabulum most, especially for the younger children.
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Received: 27 March 2018
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