| Autor: |
Kanehira M; Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry., Ishihata H; Division of Periodontology and Endodontology, Department of Oral Biology, Tohoku University Graduate School of Dentistry., Araki Y; Functional Photochemistry and Chemical Biology, Division of Organic- and Bio-Materials Research, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University., Takahashi H; Department of Oral Biomaterials Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University., Sasaki K; Division of Advanced Prosthetic Dentistry, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry., Finger WJ; Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry. |
| Abstrakt: |
The aim of this study was to investigate the effects of artificial saliva on permeability measured using a highly sensitive digital flow meter of dentin discs treated with a phosphate containing desensitizer compound (Teethmate desensitizer; TD). Four random groups (n=10) were treated either with TD or distilled water (DW), then stored in artificial saliva (AS) or DW for 1 day, 1 week and 1 month. Flow rates under 2 kPa pressure were calculated as percentage reduction (PR%) from the baseline. The PR% of TD/AS group was significantly lower after 1 day and 1 week, but the PR%s of 1 month groups among TD/AS, TD/DW and DW/AS were not significantly different. The SEM photograph of TD/AS group displayed that the dentin surface was densely covered with mineral deposits. Ca and phosphate ions from the artificial saliva could penetrate into the tubules and precipitate as hydroxyapatite, resulting in the reduction in permeability. |
