Influence of Thin Mucosal Tissues on Crestal Bone Stability Around Implants With Platform Switching: A 1-year Pilot Study

PurposeThe aim of this pilot study was to determine what effect thin mucosal tissues can have on crestal bone stability around implants with platform switching.Materials and MethodsTwelve 2-piece implants, consisting of 6 implants with horizontally matching implant-abutment connection (control) and 6 implants with platform switching (test) were placed in 4 patients. The mean age of the patients was 43 years (range, 37 to 56 yrs). Mucosal tissue thickness at implant sites was measured to be 2 mm or less. Implants were restored with 5 splinted crowns and single 3-unit fixed partial denture. Intraoral radiographs were obtained and crestal bone changes were measured at implant placement and after a 1-year follow-up post-treatment. The statistical significance level was set to P less than .05.ResultsBone loss around the test implants was 1.81 ± 0.39 mm on the mesial site and 1.70 ± 0.35 mm on the distal aspect. Control implants overcame marginal bone resorption equaling 1.60 ± 0.46 mm on the mesial site and 1.76 ± 0.45 mm on distal measurement. No statistically significant difference was found between control and test implants either mesially (F[1,10] = 0.746; P = .408) or distally (F[1,10] = 0.080; P = .783).ConclusionWithin the limitations of this pilot study it can be concluded that implants with platform switching did not preserve crestal bone better in comparison with implants with traditional implant-abutment connection if, at the time of implant placement, thin mucosal tissues were present.