Proximal humerus rear side anatomical type auxiliary steel plate

Abstract

The invention relates to a proximal humerus rear side anatomical type auxiliary steel plate. The proximal humerus rear side anatomical type auxiliary steel plate comprises a plate body, wherein the plate body comprises an end plate and a tail plate; the end plate is provided with an accommodating surface which cooperates with a humerus backward inclination angle; the longitudinal cross section ofthe tail plate adopts an arc shape; the inclined angles alpha between the end of the tail plate and the tangent of an arc as well as between the empty end of the end plate and the tangent of the arc are 120-150 degrees; the horizontal cross section of the end plate adopts an arc shape, and the diameter of a circle having the arc is 5-12cm; end plate holes, a first tail plate hole, a second tail plate hole and a third tail plate hole are sequentially formed in the plate body from top to bottom; the tail plate is wide in the upper part and narrow in the lower part, the width of the upper sectionis 6-11mm, the widest part of the tail end is 4-8mm, and the bottom end of the tail plate is an arc; and the horizontal cross section of the tail plate is an arc, and the diameter of a circle havingthe arc is 3-8cm. The proximal humerus rear side anatomical type auxiliary steel plate disclosed by the invention can effectively avoid the backward turning of the humerus head, and the postoperativerecovery effect is improved.

Description

technical field [0001] The invention relates to an auxiliary steel plate used for bone fixation when the humeral head is fractured, and a fixed steel plate used in conjunction with a main fixed steel plate, which are used to prevent the humeral head from turning backward and improve postoperative recovery effect. Background technique [0002] Accurate restoration of the humeral retroversion angle (RA) is the key point and difficulty in the operation of open reduction and internal fixation for complex proximal humeral fractures, and it is also an important factor affecting the prognosis. [0003] Poor recovery from RA can cause changes in the glenohumeral anatomy, and even subtle changes can cause serious biomechanical changes. [0004] Symeonides PP and other studies found that the reduction of humeral head retroversion is often related to habitual shoulder dislocation and shoulder dislocation caused by minimal force. [0005] The in vivo study of Myers JB et al confirmed t...

AI Technical Summary

Problems solved by technology

[0009] The fracture is comminuted, and the intraoperative plate shaping lacks anatomical landmarks, making it impossible to achieve anatomical reconstruction

[0010] It is difficult to temporarily fix the fracture during the operation, and the Kirschner wire fixation is not firm, easy to dislocate and hinder the placement of the Philos plate

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