Abstract
Aim: Can comparable results be obtained regarding the postoperative improvement of range of motion using ßexionosteotomy alone in comparison to the three-dimensional corrective osteotomy. Material and Methods: 16 patients after SCFE were analyzed (7 female, 9 male). A computer program for simulation of movement and osteotomy developed by the authors, served for study execution. According to 3D-reconstruction of the computer tomography data the physiological range was determined by ßexion, abduction and internal rotation. The three-dimensional osteotomy was compared with the onedimensional ßexionosteotomy. Both inter-trochanteric osteotomy techniques were simulated and the improvements of the movement range were assessed and compared. Results: The average slipping and thus correction angles measured inferior 25.5¡ (range: 7.5¡–51.0¡) and posterior 52.0¡ (range: 29.0¡– 78.5¡). After the simulation of osteotomy by Southwick the angle of ßexion was 61.3¡ (improvement: 41.4¡), of abduction 60.3¡ (improvement: 42.9¡) and interior rotation of 70.1¡ (improvement: 52.6¡). The ßexionsosteotomy after Grifþth achieved a ßexion of 66.7¡ (improvement: 46.8¡), an abduction of 41.1¡ (improvement: 23.7¡) and an internal rotation of 57.4¡ (improvement: 40.0¡). Conclusion: The improvement of the free movement range after ßexion osteotomy is comparable, with three-dimensional osteotomy after Southwick with the exception of the abduction angle.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
