Phenolic resin was modified respectively using four latexes of butyronitrile-butadiene,carboxylic butyronitrile-butadiene,styrene-butadiene and pyridine-butadiene.
The catechin, ursolic were determined by HPLC.The polysaccharide and tannide were determined by sulphoacid-phenol and complexometric titration methods respectively.
The operation mainly used epineurium-epineurium coaptation, neuroma-epineurium coaptation and epineurium-tissue coaptation respectively.Therefore, the ruptured nerves were sutured without tension.