Abstract
BACKGROUND: Calcaneous tendon injuries are commonly seen as consequences of sports trauma and costly in terms of surgery and rehabilitation. Low Level Laser Therapy (LLLT) has been used to accelerate healing process and avoid tissue adhesions. We investigated the response of experimental lesions of the calcaneous tendon in rats after LLLT therapy.METHODS AND MATERIAL: Thirty adult male Wistar rats weighing 250 to 300 g were surgically submitted to bilateral partial transverse section of the calcaneous tendon. The right tendon was treated with LLLT whereas the left tendon served as control. On the third postoperative day, the rats were divided into three experimental groups consisting of ten rats each which were treated with LLLT ( Konf, Aculas ‐ HB 750), 780nm and 80mW for 20 seconds, three times/week for 7, 14 and 28 days. Collagen I, II, and III gene expression were studied.RESULTS: Increased collagen II gene expression was observed in all experimental groups.CONCLUSION: mRNA gene expression for COLIIA1 is confirmed with immunolocalization of type II collagen and suggests that it could give support to the interstitial tissues on healing process of the calcaneous tendon. Further studies are needed to confirm LLLT role in tendon healing.
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