Effect of Collagen Type I on the Hydroxyproline Content in Experimentally Induced Injury in Achilles' Tendon in Dogs

Objective- To determine the effect of collagen type I on hydroxyproline content in Achilles tendon in dogs. Design- Experimental in vivo study. Animals- A total of 12 adult dogs. Procedure- Under general anesthesia and aseptic condition the dorsal surface of right Achilles tendon was exposed and after complete separation of connective tissue, it was splitted (striking 10 times) in full thickness in longitudinal fashion of 3cm in length in the mid-tendon area using BP blade no 15 in each one. These animals were divided into two groups of control (untreated) and experiment (treated with collagen type I) having 6 animals each. The hydroxyproline concentration was measured by modified spectrophotometer method by collecting samples from mid splitted area of injured and normal tendons of each animal from treated and untreated tendons on 30 in three dogs in each group and 90 days in remaining animals after surgery. The collected data was analyzed using student t-test at P