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Patellofemoral relationships and cartilage breakdown
A Harilainen1, M Lindroos, J Sandelin
1Invalid Foundation, ORTON Orthopaedic Hospital, Tenholantie 10, 00280 Helsinki, Finland. arsi.harilainen@invalidisaatio.fi
Summary
Specific patellar malalignments, including lateral tilt and high positioning, are linked to cartilage damage in the knee. These findings suggest predispositions to patellofemoral cartilage lesions.
Area of Science:
- Orthopedics
- Radiology
- Sports Medicine
Background:
- Anterior knee pain and meniscal tears are common in young adults.
- Patellofemoral malalignment is suspected to contribute to cartilage lesions.
- Understanding these relationships can inform treatment strategies.
Purpose of the Study:
- To investigate the association between patellofemoral alignment and cartilage lesions.
- To identify specific malalignments linked to patellofemoral cartilage damage.
Main Methods:
- Evaluated 45 patients (age 15-49) with anterior knee pain or isolated meniscal rupture.
- Assessed patellar position using knee radiographs and the Insall-Salvati index.
- Graded and mapped cartilage lesions via arthroscopy.
Main Results:
- Lateral patellar cartilage lesions correlated with lateral patellar tilt (p < 0.01) and displacement (p < 0.001).
- Central patellar cartilage lesions were associated with high patellar position (Insall-Salvati index, p < 0.01) and lateral displacement (p < 0.05).
- Lateral femoral trochlea lesions showed significant patellar lateral displacement (p < 0.001).
Conclusions:
- Specific patellar malalignments appear to predispose individuals to patellofemoral cartilage lesions.
- Further prospective studies are required to confirm these associations and causal links.