Relationship Between Trochlear Dysplasia and Chondromalacia Patellae

Abstract

Objective:Purpose of the study is to analyze the association between trochlear dysplasia and chondromalacia patellae.Method:Knee magnetic resonance imaging of 191 patients (103 female and 88 male, mean age: 33±3.1, range: 18-49) with trochlear dysplasia were involved in the retrospective study. Patients without trochlear dysplasia (100 female and 91 male, mean age: 31±4.2 years, range: 18-49) were considered as the controls. Trochlear dysplasia was classified (type A, type B, type C, type D). Tibial tuberosity-trochlear groove distance was detected. Chondromalacia patellae was examined separately at the medial and lateral facet.Results:The distribution of trochlear dysplasia was as follows; type A (50.2%), Type B (30.3%), type C (13.6%), type D (5.9%). Chondromalacia patellae was detected in 81 (42.4%) of patients with trochlear dysplasia and in 39 (20.4%) of the controls (p<0.05). Chondromalacia patellae was significantly more frequent at the lateral facet. There was significant association between the type of trochlear dysplasia and chondromalacia patellae. As the degree of dysplasia increases, the frequency of chondromalacia patellae increases (p<0.05).Conclusion:Trochlear dysplasia and degree of trochlear dysplasia is a significant risk factor for chondromalacia patellae especially in lateral facet.

Keywords

• cartilage
• chondromalacia patellae
• knee
• trochlear dysplasia