Effectiveness of Implant Therapy Analyzed in a Swedish Population: Prevalence of Peri-implantitis

Peri-implantitis is an inflammatory disease affecting soft and hard tissues surrounding dental implants. as the global number of individuals that undergo restorative therapy through dental implants increases,peri-implantitis is considered as a major and growing problem in dentistry. a randomly selected sample of 588 patients who all had received implant-supported therapy 9 y earlier was clinically and radiographically examined. prevalence of peri-implantitis was assessed and risk indicators were identified by multilevel regression analysis. forty-five percent of all patients presented with peri-implantitis (bleeding on probing/suppuration and bone loss >0.5 mm). moderate/severe peri-implantitis (bleeding on probing/suppuration and bone loss >2 mm) was diagnosed in 14.5%. patients with periodontitis and with ≥4 implants,as well as implants of certain brands and prosthetic therapy delivered by general practitioners,exhibited higher odds ratios for moderate/severe peri-implantitis. similarly,higher odds ratios were identified for implants installed in the mandible and with crown restoration margins positioned ≤1.5 mm from the crestal bone at baseline. it is suggested that peri-implantitis is a common condition and that several patient- and implant-related factors influence the risk for moderate/severe peri-implantitis (clinicaltrials.gov nct01825772). © international & american associations for dental research.