University of Twente Student Theses
The Assessment of Morphologic Bilateral Asymmetry in Knees with and without Trochlear Dysplasia
Heiligenberg, J. van den (2024) The Assessment of Morphologic Bilateral Asymmetry in Knees with and without Trochlear Dysplasia.
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| Abstract: | Introduction: Patellofemoral instability (PFI) is characterised by the dislocation of the patella from its normal anatomical position within the trochlear groove. Trochlear dysplasia significantly contributes to the onset of PFI by impairing the trochlea's ability to adequately support the patella, thereby increasing the risk of dislocation. Despite its clinical relevance, precise correction methods for trochlear dysplasia remain uncertain. Background: For correction methods in orthopaedic surgery, the contralateral bone is often used as a reference, though a detailed morphological 3D analysis regarding knee symmetry has not been conducted. Because of this, it is not clear whether the contralateral side can be used in a trochlear correction whether trochlear dysplasia potentially produces more bilateral asymmetry. This study aims to elucidate the degree of morphological bilateral symmetry in the 3D anatomy of the knee, for knees with and without trochlear dysplasia, providing foundational insights for future research across various medical fields. Method: We investigated whether the morphological bilateral symmetry of the knee bones (femur, patella, and tibia) varies between different regions of the bones, and between healthy subjects and patients with trochlear dysplasia. A mean bone was made of each of those three bones and was used as a template to calculate the surface distances between de left and right bones. Results: In healthy subjects, the median degree of asymmetry was 1.3 ± 0.7 mm for the femur, 0.9 ± 0.2 mm for the patella and 1.4 ± 0.8 mm for the tibia. The degree of asymmetry was higher for the dysplasia knees, especially for the femur and patella. The medial condyle of the femur, the medial part of the patella and the lateral part of the tibial metaphysis were the regions with the most morphological bilateral asymmetry. Conclusion: Therefore, it can be concluded that the bones of the knees are not morphological bilateral symmetrical and that the degree of asymmetry rises with the degree of trochlear dysplasia. |
| Item Type: | Essay (Master) |
| Faculty: | TNW: Science and Technology |
| Subject: | 44 medicine, 50 technical science in general |
| Programme: | Technical Medicine MSc (60033) |
| Link to this item: | https://purl.utwente.nl/essays/99840 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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