University of Twente Student Theses


Evaluation of Southwick osteotomy in SCFE patients

Haren, S.L. van and Pruijssers, C.W.A. and Waldner, S. and Zoetelief, E. (2019) Evaluation of Southwick osteotomy in SCFE patients.

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Abstract:Problem: Currently there is no method of evaluating a Southwick osteotomy performed on ado- lescents with a slipped capital femoral epiphysis. Commonly, the result of the procedure is measured in improvement in Range of Motion (RoM) during physical examination. Postoperative X-rays are only made to evaluate the healing process. A more empirical method of evaluation is needed for the surgery. This study focuses on a proof of concept for a simulated evaluation using the RoM as parameter. Method: No 3D-models are made postoperative so a preoperative 3D-model was used with a new rotation and translation. This new rotation and translation of the caput femoris was extracted from the postoperative X-ray. This is done using image registration in MATLAB. Using these rotated 3D-models from the postoperative situation a Motion Study was conducted in SolidWorks. This RoM can be compared to the planned RoM to evaluate the surgery. Results: The proof of concept was tested on a single patient to validate the method. The orientation and position of the caput femoris were found within a 5a° margin and can be used for estimating the postoperative situation. The planned simulated RoM was compared to the post-operative simulated RoM and an average difference of 5° was found. However, these values are subject to a large interobserver bias and a margin of error. Conclusion: A proof of concept was developed and the results appear to be promising. However, more research is required to further improve this method and make it viable to use for clinical evaluation of the osteotomy.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine BSc (50033)
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