title: Bacterial adhesion efficiency on implant abutments: a comparative study.
abstract: The attachment of Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 28213 onto six different materials used to manufacture dental implant abutments was quantitatively determined after 2 and 24 h of contact between the materials and the bacterial cultures. The materials were topographically characterized and their wettability determined, with both parameters subsequently related to bacterial adhesion. Atomic force microscopy, interferometry, and contact angle measurement were used to characterize the materials' surfaces. The results showed that neither roughness nor nano-roughness greatly influenced bacterial attachment whereas wettability strongly correlated with adhesion. After 2 h the degree of E. coli attachment markedly differed depending on the material whereas similar differences were not observed for S. aureus, which yielded consistently higher counts of adhered cells. Nevertheless, after 24 h the adhesion of the two species to the different test materials no longer significantly differed, although on all surfaces the numbers of finally adhered E. coli were higher than those of S. aureus.
authors.forename: Marina
authors.initials: M
authors.lastname: Etxeberria
authors.forename: Lidia
authors.initials: L
authors.lastname: López-Jiménez
authors.forename: Alexandra
authors.initials: A
authors.lastname: Merlos
authors.forename: Tomás
authors.initials: T
authors.lastname: Escuín
authors.forename: Miguel
authors.initials: M
authors.lastname: Viñas
mesh_terms: D001422:Bacterial Adhesion; D000044:Dental Abutments / Q000382:microbiology*; D004866:Equipment Contamination / Q000706:statistics & numerical data*; D004926:Escherichia coli / Q000254:growth & development / Q000502:physiology*; D013211:Staphylococcus aureus / Q000254:growth & development / Q000502:physiology*