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Proximal fractures are classified into one of four types of fractures based on the displacement of the greater tubercle, the lesser tubercle, the surgical neck, and the anatomical neck, which are the four parts of the proximal humerus, with fracture displacement being defined as at least one centimeter of separation or an angulation greater ...
This nerve is the most commonly injured nerve in proximal humerus fractures due to its location close to the proximal humerus. [ 12 ] Muscles that attach to the proximal humerus and can cause a deforming force on fracture fragments include the pectoralis major , the deltoid , and the rotator cuff muscles .
unstable spinal fracture-dislocation at the thoracolumbar junction: Thoracic Spine Fractures and Dislocations at eMedicine: Hume fracture: A.C. Hume: olecranon fracture with anterior dislocation of radial head: Ronald McRae, Maxx Esser. Practical Fracture Treatment 5th edition, page 187. Elsevier Health Sciences, 2008.
The Müller AO Classification of fractures is a system for classifying bone fractures initially published in 1987 [1] by the AO Foundation as a method of categorizing injuries according to therognosis of the patient's anatomical and functional outcome. "AO" is an initialism for the German "Arbeitsgemeinschaft für Osteosynthesefragen", the ...
The Milch classification is a system of categorizing single column (AO type B) distal humerus fractures based on the pattern of epicondyle involvement. It is distinct from the Jupiter classification which is used for bicolumnar distal humerus fractures.
When the humerus is driven from the glenoid cavity, its relatively soft head impacts against the anterior edge of the glenoid. The result is a divot or flattening in the posterolateral aspect of the humeral head, usually opposite the coracoid process. The mechanism which leads to shoulder dislocation is usually traumatic but can vary ...
The Gartland classification is a system of categorizing supracondylar humerus fractures, clinically useful as it predicts the likelihood of associated neurovascular injury, such as anterior interosseous nerve neurapraxia or brachial artery disruption.
A fracture in this area is most likely to cause damage to the axillary nerve and posterior circumflex humeral artery. Damage to the axillary nerve affects function of the teres minor and deltoid muscles, resulting in loss of abduction of arm (from 15-90 degrees), weak flexion, extension, and rotation of shoulder as well as loss of sensation of ...