title: Bacterial colonization of the internal part of two-stage implants. An in vivo study.
abstract: This study aimed to investigate the presence of microorganisms in the inner thread of the fixture (endosteal implant part) of the Brånemark system. In 9 volunteers the apical part of 2 abutment screws that had been in place for 3 months was examined by means of differential phase-contrast microscopy. All screws harboured a significant quantity of microorganisms, mainly coccoid cells (86.2%) and nonmotile rods (12.3%). Motile organisms (1.3%) or spirochetes (0.1%) were only sporadically registered. A microbial leakage at the abutment/fixture interface probably is the most probable origin for this contamination.
authors.affiliation: Department of Periodontology, Faculty of Medicine, Catholic University of Leuven, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Quirynen
authors.forename: D
authors.initials: D
authors.lastname: van Steenberghe
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D015169:Colony Count, Microbial; D015921:Dental Implants; D003763:Dental Leakage / Q000150:complications*; D004866:Equipment Contamination; D006801:Humans; D008858:Microscopy, Phase-Contrast; D016459:Prosthesis-Related Infections / Q000382:microbiology*
chemical_list: D015921:Dental Implants