Amniotic membrane as an option for treatment of acute Achilles tendon injury in rats

Abstract Purpose: To evaluate the effect of human amniotic membrane (hAM) fragment on inflammatory response, proliferation of fibroblast and organization of collagen fibers in injured tendon. Methods: Sixty rats were divided into 3 groups: C - surgical procedures without tendon lesion and with simulation of hAM application; I - surgical procedures, tendon injury and simulation of hAM application; T - surgical procedures, tendon injury and hAM application. These groups were subdivided into four experimental times (3, 7, 14 and 28 days). The samples underwent histological analysis and ATR-FTIR spectroscopy. Results: Histological analysis at 14 days, the T group showed collagen fibers with better alignment. At 28 days, the I group presented the characteristics described for the T group at 14 days, while this group presented aspects of a mature connective tissue. FT-IR analysis showed a clear distinction among the three groups at all experimental times and groups T and I presented more similarities to each other than to group C. Conclusion: Acute injury of tendon treated with human amniotic membrane fragment showed a faster healing process, reduction in inflammatory response, intense proliferation of fibroblasts and organization of collagen fibers.

Complejo postero-externo de la rodilla: conceptos actuales / Posterolateral corner of the knee: current concepts

Las lesiones del complejo posteroexterno (CPE) comprenden una porción significativa de las lesiones ligamentarias de la rodilla. Se necesita un alto índice de sospecha durante la evaluación de la rodilla lesionada, un examen físico completo y una revisión exhaustiva de los estudios radiográficos para poder identificar estas lesiones. En este sentido, las radiografías con estrés pueden ayudar a determinar objetivamente el alcance de estas lesiones. Las opciones de tratamiento quirúrgico o no, se encuentran en función de la gravedad de la lesión. Las lesiones completas del CPE rara vez se curan con tratamiento no quirúrgico, por lo que son tratados con mayor frecuencia quirúrgicamente. El propósito de este artículo fue revisar la anatomía y biomecánica clínicamente relevantes, los algoritmos de diagnóstico, los protocolos de tratamiento y rehabilitación para las lesiones del CPE.

Injuries to the posterolateral corner (PLC) comprise a significant portion of knee ligament injuries. A high index of suspicion is necessary when evaluating the injured knee to detect these sometimes-occult injuries. Moreover, a thorough physical examination and a comprehensive review of radiographic studies are necessary to identify these injuries. In this sense, stress radiographs can help to objectively determine the extent of these lesions. Non-operative and operative treatment options have been reported depending on the extent of the injury. Complete PLC lesions rarely heal with non-operative treatment, and are therefore most often treated surgically. The purpose of this article was to review the anatomy and clinically relevant biomechanics, diagnosis algorithms, treatment and rehabilitation protocols for PLC injuries.

Estudo morfológico e biomecânico dos tendöes do músculo supra-espinhoso e porçäo longa do píceps braquial / Morphplogical biomechanical study the tendons of the supraspinatus and biceps brachii

Tendöes do músculo supre-espinhoso e biceps braquial de 57 adultos submetidos a autópsia foram estudados para avaliar-se a freqüência de rotura tendinosa, comprimento do tendäo e resistência à traçäo. No grupo com idade entre 20 e 50 anos, nenuma rotura tendinosa foi observada, contrastando com a pecentagem de 66,7 por cento, observada na faixa etária entre 71 e 80 anos. O comprimento dos tendöes apresentou aumento com o avanço da idade e a resistência à traçäo nos grupos com idade entre 61 e 80 anos era 40 por cento menor do que nos grupos com idade entre 20 e 40 anos. A resistência à traçäo do tendäo do músculo bíceps braquial estava nos grupos etários mais avançados 28 por cento reduzida, em relaçäo aos mais jovens