Background: It was demonstrated that implants restoredaccording to a platform-switching concept presented lesscrestal bone loss than implants restored with standard protocols. The aim of this study is to examine differences betweenthe composition of the peri-implant microbiotas associatedwith implants restored with the platform-switching approachand implants restored with a standard internal connection protocol.Methods: A total of 48 implants were examined in 18 subjects: 33 implants were restored with platform switching, and15 implants were restored using the traditional approach.Thirty-six months after prosthetic loading, subgingival plaquesamples were taken from the mesio- and disto-buccal aspectsof each implant and from one tooth adjacent to one of the implants in each subject. The levels of 40 subgingival specieswere measured using checkerboard DNA-DNA hybridization.Microbiologic parameters were averaged within each subjectand across subjects in each clinical group (platform switchingversus control) and site category (implants versus teeth) separately. The significance of differences between clinical groupsand site categories was determined using the Mann-Whitneytest and the Wilcoxon test, respectively.Results: There were no statistically significant differencesbetween groups for any of the species. The platform-switchinggroup showed a small trend for lower levels of early colonizermembers of the Actinomyces, purple and yellow complexes,Campylobacter species, Tannerella forsythia (previously T.forsythensis), and Porphyromonas gingivalis. Teeth and implants presented similar microbial profiles.Conclusion: The results of the study suggest that the difference in bone crest resorption between implants restored withplatform switching compared to traditionally restored implants is not associated with differences in the peri-implantmicrobiota
The microbiota associated with implants restored with platform switching: a preliminary report
Canullo L;
2010-01-01
Abstract
Background: It was demonstrated that implants restoredaccording to a platform-switching concept presented lesscrestal bone loss than implants restored with standard protocols. The aim of this study is to examine differences betweenthe composition of the peri-implant microbiotas associatedwith implants restored with the platform-switching approachand implants restored with a standard internal connection protocol.Methods: A total of 48 implants were examined in 18 subjects: 33 implants were restored with platform switching, and15 implants were restored using the traditional approach.Thirty-six months after prosthetic loading, subgingival plaquesamples were taken from the mesio- and disto-buccal aspectsof each implant and from one tooth adjacent to one of the implants in each subject. The levels of 40 subgingival specieswere measured using checkerboard DNA-DNA hybridization.Microbiologic parameters were averaged within each subjectand across subjects in each clinical group (platform switchingversus control) and site category (implants versus teeth) separately. The significance of differences between clinical groupsand site categories was determined using the Mann-Whitneytest and the Wilcoxon test, respectively.Results: There were no statistically significant differencesbetween groups for any of the species. The platform-switchinggroup showed a small trend for lower levels of early colonizermembers of the Actinomyces, purple and yellow complexes,Campylobacter species, Tannerella forsythia (previously T.forsythensis), and Porphyromonas gingivalis. Teeth and implants presented similar microbial profiles.Conclusion: The results of the study suggest that the difference in bone crest resorption between implants restored withplatform switching compared to traditionally restored implants is not associated with differences in the peri-implantmicrobiotaI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
