“…Mechanical barriers like alumina sheaths, polyethylene membranes, cellophane, sterispon wrapping, stainless steel or silicone sheeting, amniotic membranes, chitosan membranes, silicone rubber envelopes, polytetrafluoroethylene surgical membranes, seprafilm, hydrogel sealant, chondritin sulphate coated polyhydroxyethyl metacrylate membrane, and autogenous vein graft may be either biological or synthetic [3,6,11,16,19,20,25]. The ideal barrier would be easy to use, biocompatible, allow tendon movement, not add undue bulk, remain at the site of repair long enough to allow tendon healing (extrinsic healing), absorbable, and cheap.…”