Prognosis of implants installed simultaneously with periodontal surgery of the adjacent tooth

Abstract

Background : Progressive periodontal disease has an adverse effect on the prognosis of implants. In particular, if bone marrow destruction due to periodontal disease continues in the adjacent site where the implant will be placed, the clinician will have the following concerns-possible need for extraction or implant treatment while preserving the tooth as much as possible through surgical treatment.Aim/Hypothesis : This study examined the effects of advanced periodontal disease on implants placed at the same time as adjacent progressive periodontal surgery, by evaluating the survival rate, success rate, and marginal bone loss of implants. Material and Methods :The following patients were selected-1. Those who underwent periodontal surgery due to progressive periodontal disease in the adjacent site where the implant was to be placed and implant installation at the same time. 2. Those who were implanted at the Seoul National University Bundang Hospital from 2003 to 2007. The medical records were reviewed and the complications, implant success rate, survival rate, and marginal bone loss after implant treatment were examined. The marginal bone loss was measured using panoramic or periapical radiographs. After calculating the enlargement ratio of each radiograph, the amount of marginal bone loss was measured at the mesial and distal sides, and the average value was obtained.Results : Eleven implants were placed in a total of nine patients. There were two cases of diabetes mellitus, one case of stroke, and two cases of smokers. Two types of periodontal surgery of the adjacent teeth at the time of implant placement were performed. The regenerative surgery such as guided tissue regeneration or bone graft was performed in eight cases. The respective flap curettage was performed in three cases.Three cases of GBR, two cases of sinus lifting, one case of GBR and sinus lifting were performed at implant placement, and the remaining five implants were simply placed in healthy bone tissue. The type of upper prosthesis of 11 implants was a single crown. Postoperative complications occurred in two patients, and osseointegration failure, hematoma, and abutment fracture occurred. With the exception for the two failed implants, the mean survival duration was 123 months and the success and survival rate were 100%. The mean marginal bone loss of the survived implants was 0.16 mm. Conclusion and Clinical Implications :The prognosis of implants placed at the same time as periodontal surgery for the adjacent natural teeth with progressive periodontitis is reasonable.