Hiller, Karl-Anton and Buchalla, Wolfgang and Grillmeier, Isabel and Neubauer, Christina and Schmalz, Gottfried (2018) In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing. SCIENTIFIC REPORTS, 8: 4888. ISSN 2045-2322,
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This in vitro study evaluated the effect of toothpastes with different active ingredients on dentin permeability using an extended protocol including multiple applications and several thermal ageing cycles in the presence or absence of human saliva. The Null hypothesis was that dentin permeability of a hydroxyapatite containing toothpaste (BR), a potassium nitrate (SP) and an arginine and calcium carbonate (EH) containing toothpaste were similar. Dentin permeability was measured as hydraulic conductance using a commercially available capillary flow system (Flodec, Geneva) and results were expressed as % relative to matching controls. Without saliva, the ranking (best first) of dentin permeability was BR(61%) < SP(87%) < EH(118%), with saliva EH(63%) < SP(72%) < BR(88%). Saliva increased or decreased permeability dependent upon the test material. BR reduced dentin permeability significantly more in absence of saliva, with saliva EH was superior to BR. Repeated material application decreased and thermal ageing increased dentin permeability. The different tooth pastes reduced permeability differently, the best being BR without saliva, the least EH without saliva. The newly introduced test conditions (ageing, saliva, multiple applications) influenced single results significantly, and as they better simulate the in vivo situation they should be considered to be included in further in vitro permeability testing of desensitizing preparations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SALIVARY PROTEINS; TUBULE OCCLUSION; CLINICAL-TRIAL; HYPERSENSITIVITY; NANOCRYSTALS; ADSORPTION; POTASSIUM; REMINERALIZATION; RESTORATIONS; COMPOSITE; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie > Dr. rer. nat. Karl-Anton Hiller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Mar 2020 09:42 |
| Last Modified: | 05 Mar 2020 09:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14883 |
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