Propriedades biomecânicas do complexo labrum-glenoide biciptal superior submetido a estresse

Abstract

With the advent and the development of the artroscopia of the shoulder, the injuries of the complex labrum biciptal superior had started to be recognized as source of the shoulder disease. However, the responsible mechanisms for the injury continue unknown and the existing hypotheses are controversies. To determine the biomechanic properties of the complex labrum biciptal superior and to observe the occured alterations when submitted to continuous and sudden tractions, 18 frozen shoulders of 15 masculine corpses, age band between 20 and 40 years, they had been submitted to the tensile tests of made uniaxial traction with three distinct machines. Stress that it caused the rupture of the body of test in the continuous traction was of the order of 290N and, in the sudden traction was of 384N. All the injuries had occurred in the distal portion of the tendon of the long handle of the biceps. The results point that a simple continuous or sudden uniaxial traction in the arm is not capable to generate an injury SLAP