Multiple fracture lines, they are characterized by the fact that none One-part fractures, or minimally displaced fractures, are the mostĬommon type of proximal humeral fractures and account for up to 85% ofĪll proximal humerus fracture. Lines is not important in this classification system. More than 45 degrees from its anatomic position. For a segment to be consideredĭisplaced, it must be either greater than 1 cm displaced or angulated Fracture types are based on the presence of displacement Tuberosity, and the proximal shaft beginning at the level of the This system is based on the anatomic relationship of the four majorĪnatomic segments: articular segment, greater tuberosity, lesser The Neer classification is the most widely used system in clinical practice ( Fig. Result in osteonecrosis of the humeral head ( Fig. Tuberosities from the head disrupt this small arterial complex and can Humeral head through the bicipital groove. The terminal branches of theĪscending division of the anterior humeral circumflex artery enter the Humeral head during operative management. Useful anatomic landmark for judging rotational deformity of the Which lies in the anteriorly directed bicipital groove and provides a Infraspinatus muscles, which are the external rotators of the shoulderĪnd also insert on the greater tuberosity and (d) the biceps tendon, Glenoid during elevation of the arm (c) the teres minor and Greater tuberosity and acts to depress the humeral head into the Glenohumeral joint (b) the supraspinatus tendon, which inserts on the Inserts on the lesser tuberosity and acts as an internal rotator of the Is composed of four muscular divisions: (a) the subscapularis, which
![proximal humerus fracture proximal humerus fracture](https://0.academia-photos.com/attachment_thumbnails/82753906/mini_magick20220327-22168-9ixg07.png)
![proximal humerus fracture proximal humerus fracture](https://2.bp.blogspot.com/-MC7NFb_G9Eo/WfhiFQ0CPjI/AAAAAAAAEyY/_TRITUpbkK4d7rmbX9iSUGtaFsIzQJerACLcBGAs/s1600/Screen%2BShot%2B2017-10-31%2Bat%2B7.42.59%2BAM.png)
The surgical neck lies between the tuberosities and the The anatomic neck is the junction between the humeral head and the The proximal humerus can be considered to consist of the humeral head, the tuberosities, and the humeral shaft ( Fig.