Patellar shape - Wiberg classification
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Wiberg classification for patellar shape.
Wiberg classification is a system for describing the shape of the patella based mainly on asymmetry between the patellar medial and lateral facet on axial views of the patella.
Type I: the facets are concave, symmetrical, and of equal size.
Type II: the medial facet is smaller than the lateral facet and flat or only slightly convex. The lateral facet is concave.
Type III: the convex medial facet is markedly smaller than the concave lateral facet, and the angle between the medial and lateral facets is nearly 90°.
- 1. Manorama Berry. MUSCULOSKELETAL and BREAST IMAGING by BERRY. (2005) ISBN: 9788180614446 - Google Books
- 2. Barnett A, Gardner R, Lankester B, Wakeley C, Eldridge J. Magnetic Resonance Imaging of the Patella: A Comparison of the Morphology of the Patella in Normal and Dysplastic Knees. J Bone Joint Surg Br. 2007;89(6):761-5. doi:10.1302/0301-620X.89B6.18995 - Pubmed