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Etiological aspects in osteochondritis dissecans patellae
J Bruns1, S Luessenhop, L Lehmann
1Department of Orthopedic Surgery, University of Hamburg, Germany. j.bruns@uke.uni-hamburg.de
Summary
Osteochondritis dissecans of the patella may stem from biomechanical factors, not just trauma. Anatomical variations in patellar shape and alignment appear to be significant contributors.
Area of Science:
- Orthopedics
- Biomechanics
- Radiology
Background:
- Osteochondritis dissecans (OCD) of the patella is a rare condition.
- Etiological factors remain incompletely understood, with trauma often implicated.
Purpose of the Study:
- To investigate potential etiological factors of patellar OCD.
- To analyze anatomical and biomechanical characteristics associated with patellar OCD.
Main Methods:
- Retrospective analysis of patient data and standardized patellar roentgenography (anterior-posterior, axial, lateral views).
- Evaluation of anamnestic data and radiographic findings related to patellar morphology and alignment.
Main Results:
- Radiographic findings revealed common patellar anatomical variations in patients with OCD.
- These included flat patellar articular surfaces (Hertel types I, V), lateral facet dominance (Wiberg types II, III), and specific patellar groove shapes (trochlea type III).
- Abnormal patellar alignment (grade II medial and lateral dislocation) was also frequently observed.
Conclusions:
- Radiographic findings suggest a strong association between specific patellar anatomical variations and OCD.
- Results support the theory of biomechanical induction in the etiology of patellar OCD.
- Further dynamic studies are recommended to elucidate the precise biodynamic influences.