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. 2013 Feb 25;6:69. doi: 10.1186/1756-0500-6-69

Figure 1.

Figure 1

The 16 categories of the Neer classification. A fracture is considered displaced if one or more of the four segments are displaced more than 1 centimeter or angulated more than 45°. Modified from Neer 1970 [11] with permission from JBJS Am, Rockwater Inc.