TY - JOUR T1 - Effect of Collagen Gel on Sciatic Nerve Regeneration in the Polyvinylidene Fluoride Tube TT - تاثیر ژل کلاژن بر روی رژنراسیون عصب سیاتیک در لوله پلی وینیلیدین فلوراید (مطالعه فانکشنال و هیستولوژی) JF - Yafteh JO - Yafteh VL - 7 IS - 3 UR - http://yafte.lums.ac.ir/article-1-1082-en.html Y1 - 2005 SP - 3 EP - 13 KW - Sciatic nerve KW - Collagen gel KW - PVDF N2 - Background: The limited availability of donor sites for nerve grafting has continued to stimulate research toward finding suitable alternatives for autograft. The aim of this research was to study the effect of piezoelectric channel and collagen gel on nerve regeneration. Materials and methods: This research is an experimental study. Forty eight male rats (200-250 gr) were used. After axotomy, 1cm segment of the sciatic nerve in rats was resected, and the gap was then bridged by one of the four methods (Polyvinylidene fluoride or PVDF + Collagen gel, Autograft, Sham and Control). All animals were evaluated at 7, 21, 35, 46, 60 and 90 days after operation by sensory test, sciatic functional index (SFI) and at 90 days by electrophysiologic testing. Sciatic nerve was studied by light and electron microscope after 4 and 12 weeks of implantation. Findings: At 90 days after operation, there was no difference in sensory testing between groups. The mean SFI at the 9 weeks, in autograft group was superior to that of Collagen gel + PVDF group (P M3 ER -