Table 2 The Dejour’s classification of trochlear dysplasia
From: Updated treatment guidelines for patellar instability: “un menu à la carte”
Type | Sagittal View | Axial images |
|---|---|---|
A (54%) | CS | Shallower trochlea |
B (17%) | CS and SS | Flat or convex |
C (9%) | CS and DC | Convex lateral facet and hypoplastic medial facet |
D (11%) | CS, SS, DC | A prominent and convex lateral facet with a vertical connection (squared) to an hypoplastic medial facet almost absent (cliff pattern). |