Abstract
A case is reported showing an iatrogenic, chronic abscess of six years' duration associated with a bony defect between the maxillary right central and lateral incisors. The osseous defect was treated by a guided tissue regeneration procedure with the use of a fibrin and fibronectin sealing system. The system was employed to fix the membranes and keep them apart from the root surface, thereby maintaining room for bone regeneration. This operation resulted in a 9-mm clinical attachment gain and in an 11-mm filling of the osseous defect. The second surgical stage after a three-month reentry procedure was strictly for cosmetic improvement by means of a free gingival graft.
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