NUMERICAL ANALYSIS OF SURGICAL TREATMENT OF SHOULDER INJURIES USING THE TECHNIQUE OF WEAVER-DUNN
Gabriela Lima Menegaz1; Cleudmar Amaral Araújo1; Leandro Cardoso Gomide2
1 Faculdade de Engenharia Mecânica/UFU; 2 Faculdade de Medicina/UFU
Resumo
The upper limbs are constituted by the shoulder, arm, forearm and hand. The shoulder consists of the sternoclavicular, acromioclavicular and shoulder joints. The acromioclavicular joint is stabilized by ligaments and deltoid and trapezius muscles. The ligaments which constitute this joint are the acromioclavicular, coracoacromial and coracoclavicular, that is divided into trapezoid and conoid. The joint can be injured due to the direct fall on shoulder or on extended upper limb and are common in sports with hard contact. The acromioclavicular dislocation is classified into different types and there are specific treatments for each one. The Weaver-dunn technique is one of the most common and consists in removing the intact coracoacromial ligament of the acromion, followed by its direct attachment to the structure of the clavicle. In this study, the Weaver-dunn technique was evaluated and the analysis of the influence of coracoacromial ligament transfer was performed using three-dimensional models by the finite element method. In intact acromioclavicular joint, considering the proposed conditions, the trapezoid ligament showed higher stress values. The distance between the clavicle and the coracoid process showed similar behavior among the technique evaluated and the intact joint. Thus, considering the simplifications of the models, it was concluded that the transfer of the coracoacromial ligament is an efficient technique to stabilize the acromioclavicular joint.
Palavras-chave: Acromioclavicular Dislocation; Weaver-dunn Technique; Finite Elements Method; Orthopedics