The current trail designed toevaluate the effectivenessofusing small intestinalsubmucosa ( SIS ) to accelerate healing of Achilles tendon in thestray local breeddog .Ten healthy dogs of both sexeswere usedin thepresent studywhich randomly divided into two equal groups. Thefirstgroup;Achilles tendon acutetransversely transectedand sutured via cross mattress technique with silk suture materialwith supporting ofgypsona.The second groupacute transected tendon sutured andtreated with thesmall intestinal submucosal patch .All operative dogs inspected clinically,grossly as well ashistopathologically during different periods. Results obtained in the first group showed no contamination, no complicationsand there was no anatomical distortions were detectedat operative site except there is adhesion between tendon and neighboring tissues in the first group healing was uncompleted, suture material still presence up to 90 day.At treatment groupclinically animals lame and sign of mild stiffness appeared for three days, no serious complications, grossly was no adhesion detected, the submucosa subsided completely and complete healing occurs at 90 days postoperatively.Histologicallyatcontrol group 30 days post operativelyuncompleted healing, moderate fibroblast proliferation and inflammatory cells were presence, but at 90 dayspresence of dense connective at the site of operation. In treatmentgroup healing progress, autograft is mostly atrophied and organized with granulation at 90 days,hence healing completed perfectly at this period.
In conclusion The repairing of acute transverse cutting of Achilles tendon was significantly accelerated with small intestinal submucosal layer which was absorbed andimproves the tissue quality render the native one .