ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the clinical effect of acellular dermal matrix allograft in repairing the oral mucosal defect of immediate implant.</p><p><b>METHODS</b>51 cases underwent immediate implant surgery for 67 implants right after the teeth or roots extracted. The mucosal defect of implant areas were repaired by acellular dermal matrix. The basal membrane side of acellular dermal matrix was exposed to oral cavity, and another side was attached to the implant and alveolar crest surface. It was intercalated between mucosal flap and alveolar and fixed by iodoform pack or base plate. To understand condition of wound healing the patients were followed up from 4 months to 6 months after operation. The acellular dermal matrix closed wound and histological changes were observed. The implant was followed up months to 4 years.</p><p><b>RESULTS</b>The wounds were completely healed in 54 implant areas, partially healed in 11 implant areas, not healed 2 implant areas. histological examination wasn't differentiation between mucous epithelium and graft epithelium. None of 67 implants showed deterioration in the follow-up of one year. It was no obvious sign of immune rejection.</p><p><b>CONCLUSION</b>The clinical result of acellular dermal matrix in repair the mucosal defect of immediate implant is good, the advantages are not to affect the integration bone with implant, less operation trauma, good esthetics results.</p>