- Discussion:
- characterized by tearing of coracoclavicular ligaments & upward displacement
of the medial fragment;
- displacement secondary to frx medial to the CC ligaments
- Deforming Forces:
- wt of arm pulls outer fragment downward and forward due to attachments
of trapezoid ligament to scapula;
- pectoralis major and minor muscle and the latissimus muscles draw distal
segment downward & medially, causing over riding;
- Classification:
-
Type A - conoid and trapezoid attached to distal fragment
-
Type B
- conoid torn, trapezoid attached to distal fragment
- IIb frx has high incidence of non union due to deforming forces:
- Treatment:
- because they are unstable & prone to nonunion, type II frx often
require surgical rx, particularly if frx frag are widely separated;
- reducing displaced clavicle & securing it to
Coracoid process is preferred;
