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Early Microbial Colonization of Permucosal Implants in Edentulous PatientsDepartment of Conservative Dentistry (Periodontology), University of Athens, Greece
Departments of Preventive and Community Dentistry University of Nijmegen, P.O. Box 9101, NL-6500 HB Nijmegen, The Netherlands
Department of Periodontology University of Nijmegen, P.O. Box 9101, NL-6500 HB Nijmegen, The Netherlands
Department of Prosthodontics, University of Nijmegen, P.O. Box 9101, NL-6500 HB Nijmegen, The Netherlands In edentulous patients, the microbial colonization of permucosal implants of sintered hydroxyapatite was studied. Samples were taken from mucosa and dentures before insertion of implants and from supra- and subgingival sites two to 10 weeks after insertion. In total, five patients and 10 implants with clinically healthy peri-implant tissues were studied. The samples were investigated by dark-field microscopy and anaerobic culture. The supragingival plaque of the implants was dominated by Gram-positive cocci and rods, the subgingival plaque by Haemophilus spp. and Veillonella parvula. A group of bacteria was found specifically related to the implants: Actinomyces odontolyticus, Peptostreptococcus micros, Haemophilus actinomycetemcomitans, Eikenella corrodens, Capnocytophaga sputigena, and Leptotrichia buccalis. Black-pigmented Bacteroides was not found in any of the examined samples. Spirochetes were observed in denture plaque samples and in supragingival plaque of the implants. It is concluded that bacteria known as potential periodontal pathogens colonize the permucosal implants in the first weeks after insertion. The presence of these species seems to be dependent on the ecological factors provided by the artificial gingival crevice of the permucosal implants in the edentulous mouth.
Journal of Dental Research, Vol. 66, No. 11,
1654-1657 (1987) This article has been cited by other articles:
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