A fused central incisor. Periodontal considerations in comprehensive treatment.

This report details the treatment of a permanent central incisor fused to a supernumerary tooth. The level of fusion was first determined by radiographs, but surgical visibility indicated a more extensive fusion. The two roots were separated, and the supernumerary tooth was removed. At 10 weeks postoperatively, orthodontic treatment was instituted, bringing the retained tooth through the healing socket left by the supernumerary, and into contact with the interdental septum. After endodontic treatment and splinting, a periodontal re-entry procedure was necessitated by the persistence of inflammation caused by incomplete removal of the furcation-like area between the fused teeth. The improved periodontal prognosis of this case at 1-year follow-up can be attributed to careful postsurgical evaluation and subsequent removal of this plaque-retentive area.