Abstract:

Objective:The purpose of this study was to evaluate the safety and therapy effects of super-high molecular weight poly-DL- lactic acid (PDLLA) internal fracture-fixing system on the treatment of mandible fracture in dogs.Methods:The authors treated dogscmandible fracture with super-high molecularweight polylactic acid internal fracture-fixing system and observed the activity of these dogs. In 1, 3, 6, 12 months after the operation, the authors took the specimens out from dogs and evaluated with anatomi- cal, pathological and radiographic methods.Results:The therapeutic effects of super-high molecularweight PDLLA internal frac- ture-fixing system are similarwith that of stainless steel internal fracture-fixing systems.Conclusion:Super-high molecular weight PDLLA internal fracture-fixing system can be used in the treatment of mandible fracture.

Key words: poly_DL_lacticacid, mandible fracture, internal fracture_fixing systemdogs, dogs