title: Influence of dentin on the effectiveness of antibacterial agents.
abstract: The influence of dentin on the effectiveness of three antibacterial agents (triclosan, glutaraldehyde, NaOCl) on Streptococcus mutans, S. sobrinus, and Lactobacillus acidophilus was tested using the agar diffusion method with and without bovine dentin discs (200 mum and 500 mum thickness) placed between bacteria and test substances. The effect of 0.3% triclosan on all tester strains (100%) was reduced after passage through 500 mum dentin discs to 0% (L. acidophilus) and to 22% and 28% (S. mutans and S. sobrinus). Seal&Protect (Dentsply, Konstanz, Germany), a triclosan containing dental bonding agent, produced inhibition zones only against S. mutans, but no zone when applied on 200 mum dentin discs. The inhibition zones for 1% NaOCl and 5% glutaraldehyde against all tester strains were significantly increased up to 230% (glutaraldehyde) and 236% (NaOCl) when applied on dentin discs, compared to direct application (100%). Dentin may either decrease or increase the inhibitory effect of antibacterial agents.
authors.affiliation: Department of Operative Dentistry and Periodontology, University of Regensburg, Regensburg, Germany.
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Ergücü
authors.forename: Karl-Anton
authors.initials: KA
authors.lastname: Hiller
authors.forename: Gottfried
authors.initials: G
authors.lastname: Schmalz
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000891:Anti-Infective Agents, Local / Q000494:pharmacology*; D002417:Cattle; D003804:Dentin / Q000502:physiology*; D005976:Glutaral / Q000494:pharmacology; D005779:Immunodiffusion; D007779:Lactobacillus acidophilus / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D012973:Sodium Hypochlorite / Q000494:pharmacology; D013295:Streptococcus mutans / Q000187:drug effects; D016986:Streptococcus sobrinus / Q000187:drug effects; D014260:Triclosan / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D000891:Anti-Infective Agents, Local; D014260:Triclosan; D012973:Sodium Hypochlorite; D005976:Glutaral