Score: Regan-Morrey classification
Use: Coronoid process fractures
Type I
A fracture of the intra-articular tip of the coronoid. No long-term instability is present.
Type II
A fracture involving half or less of the coronoid. Ulno-humeral stability may be significantly affected.
Type III
A fracture involving more than 50% of the coronoid process. This is very often associatd with posterior elbow instability.Reference
Classification and Diagnosis in Orthopaedic Trauma. Editors: Rahij Anwar, Kenneth W. R. Tuson, Shah Alam Khan. Cambridge University Press, 2008