Microbial tribology and disruption of dental plaque bacterial biofilms
| Autor: | Amir Hussein Rmaile, M. Aspiras, Paul Stoodley, Marilyn Ward, Philipp J. Thurner, Lorenzo Capretto, Xin Zhang, Dario Carugo, Julian A. Wharton |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
biology Biofilm Tooth surface Context (language use) Surfaces and Interfaces Condensed Matter Physics Dental plaque medicine.disease biology.organism_classification Streptococcus mutans Viscoelasticity Surfaces Coatings and Films Mechanics of Materials Tooth wear Materials Chemistry medicine Elastic modulus Biomedical engineering |
| Zdroj: | Wear. 306:276-284 |
| ISSN: | 0043-1648 |
| Popis: | We investigate tooth wear in the context of removing dental plaque biofilms from tooth surfaces using high velocity water droplets. A laboratory model system was designed using a dextran gel as a biofilm surrogate and a typodont model was used to reproduce the geometry of the mouth. Using uni-axial compression, the elastic modulus of Streptococcus mutans biofilms was 0.280 kPa (±0.350; n=30), and the relaxation time was 11 s (±12; n=10). The type of surface, concentration of sugar, chelation and osmotic pressure all had significant effects on biofilm stiffness. However, there was no direct relationship between biofilm stiffness and surface hydrophobicity or roughness. The elastic modulus of the gel was 17 kPa (±12; n=3), and the relaxation time was 15 s (±12; n=3) which was in the reported viscoelastic range of real bacterial biofilms. High velocity 115 μL water drops travelling with an exit velocity of 60 m/s were generated using a prototype interdental cleaning device (Sonicare AirFloss). High-speed imaging showed that the gel was removed within approximately 6 ms of impact by adhesive failure from the tooth surface and within approximately 26 ms of impact by cohesive failure. |
| Databáze: | OpenAIRE |
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