Developmental dysplasia of the hip (DDH) can be managed through a variety of different surgical approaches from closed reduction to simple tenotomies of the adductors and through to osteotomies of the femur and pelvis. The rate of redislocation following open reduction for the treatment of DDH may be affected by the number of intraoperative surgeons. We performed a retrospective cohort analysis of 109 patients who underwent open reduction with or without bony osteotomies as a primary intervention between 2013 and 2023. We measured the number of redislocations and number of operating surgeons (either 1 or 2 operating surgeons) to assess for any correlation. 109 patients were identified and corresponded to 121 primary hip operations, the mean age at operation was 82.2 months (range 6 to 739 months). During the 10-year period 7 hip redislocations were identified.Introduction
Materials and methods
The purpose of this study was to investigate the effect of the degree of abduction on shoulder abduction strength. Thirty healthy volunteers with no history of shoulder complaint participated in this study. A modified Nottingham Mecmesin Myometer was used. The modification allowed the Myometer to be attached to a clinic table at different angles in order to be at 90°to the arm in varying degrees of abduction. Abduction strength of both shoulders was measured on four occasions at two-week intervals. On each occasion, a different abduction position was adopted at 90°, 60°, 30°and 0°. The results showed that shoulder abduction strength varies according to the degree of abduction. In comparison with that at 90° of abduction, shoulder abduction strength showed an increase by 12.5% and of 31.3% at 60° and 30° of abduction respectively. However, it was decreased by 18.8% at 0° of abduction. The Student’s T-test showed significant difference between shoulder abduction strength at 90° abduction and all other three abduction positions.
