Abstracts [Bruxismus und Implantate] 102011

This study evaluated the success rates of 50 full-arch maxillary and/or mandibular implant supported fixed complete dentures. After a mean follow-up time of 42.1 month, 269 implants remained in function corresponding to cumulative implant success rates of 85.2% with an absolute success rate of 90.6% (269/297 implants). This study suggested that higher implant failure rates might be associated with a dental history of bruxism (29.3%) versus nonbruxers (4.6%) and surgeons with limited experience (≤5 years; 12.2%) versus surgeons with experience (2.4%). Clinical follow-up of unilateral, fixed dental prosthesis on maxillary implants. Wahlström M, Sagulin GB, Jansson LE. Clin Oral Implants Res. 2010 Nov;21(11):1294-300. Abstract AIMS/BACKGROUND: The aims of the present study were to evaluate (1) the success rate of unilateral maxillary fixed dental prosthesis (FDPs) on implants in patients at a periodontal clinic referred for periodontal treatment, (2) the prevalence of varying mechanical and biological complications and (3) effects of potential risk factors on the success rate. MATERIAL AND METHODS: Fifty consecutive patients were invited to participate in a follow-up. The patients had received FDPs on implants between November 2000 and December 2003 after treatment to achieve optimal peridontal health, and the FDPs had been in function for at least 3 years. A questionnaire was sent to the patients before the follow-up examination. Forty-six patients with 116 implants were examined. The follow-up comprised clinical and radiographic examinations and evaluations of treatment outcome. RESULTS: Before implant treatment, 13% of the teeth were extracted; of these, 80% were extracted due to periodontal disease. No implants had been lost before implant loading. One implant in one patient fractured after 3 years of functional loading and three implants in another patient after 6.5 years. The most frequent mechanical complications were veneer fractures and loose bridge screws. Patients with peri-implant mucositis had significantly more bleeding on probing around teeth and implants. Patients with peri-implantitis at the follow-up had more deep periodontal pockets around their remaining teeth compared with individuals without peri-implantitis, but these differences were not significant. Smokers had significantly fewer teeth, more periodontal pockets ≥ 4mm and a tendency towards greater marginal bone loss at the follow-up, compared with non-smokers. CONCLUSION: In the short term, overloading and bruxism seem more hazardous for implant treatment, compared with a history of periodontitis. Retrospective analysis of porcelain failures of metal ceramic crowns and fixed partial dentures supported by 729 implants in 152 patients: patient-specific and implant-specific predictors of ceramic failure.