Fracture of olecranon - Mayo classification

Mayo classification divides fractures of olecranon according to stability, displacement, and comminution. Each of the three basic types is divided into two subtypes according to the presence of comminution.

Type Description
Type I undisplaced
A) non-comminuted
B) comminuted
Type II displaced >3mm, stable
A) non-comminuted
B) comminuted
Type III displaced >3mm, unstable:
A) non-comminuted
B) comminuted

References:

1. Morrey BF, Adams RA: Fractures of the proximal ulna and olecranon, in The Elbow and its Disorders. Philadelphia, WB
Saunders, 1993, pp 405–428.
2. Newman SDS, Mauffrey C, Krikler S. Olecranon fractures. Injury. 2009 Jun;40(6):575–81.
3. Veillette CJH, Steinmann SP. Olecranon Fractures. Orthopedic Clinics of North America. 2008 Apr;39(2):229–36.

Images:

Mayo classification of olecranon fractures - displaced, non-displaced, comminuted, displaced
 

Updated 3/11/2013 19:40 by Lambert