Abstract | UNLABELLED: OBJECTIVES: The aim of this study was to evaluate the duration of dentin tubule occlusion after SiF treatment in a simulated oral environment. METHODS: To simulate dentin tubules subject to dentin hypersensitivity, dentin disks were treated with EDTA for 2 min. The disks were treated with 0.476 mol/L SiF for 3 min, and then the disks were immersed in synthetic saliva, which was regularly replenished to maintain its ionic concentration, for up to 7 days. The occluding ability of the dentin tubules was evaluated using scanning electron microscopy (SEM), and the hydraulic conductance was measured following Pashley's method at regular intervals. RESULTS: SEM photographs demonstrated that dentin tubules were occluded homogeneously and completely with the precipitate at 7 days after treatment with SiF. In addition, newly formed calcium phosphate precipitate was present at the dentin surface. The dentin permeability showed a consistently low value throughout the experimental period. The values immediately after SiF treatment and 7 days after immersion were 11.9+/-3.7% and 7.9+/-2.9%, respectively. SIGNIFICANCE:
|
Authors | Toshiyuki Suge, Akiko Kawasaki, Kunio Ishikawa, Takashi Matsuo, Shigeyuki Ebisu |
Journal | Dental materials : official publication of the Academy of Dental Materials
(Dent Mater)
Vol. 24
Issue 2
Pg. 192-8
(Feb 2008)
ISSN: 0109-5641 [Print] England |
PMID | 17544103
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Calcium Phosphates
- Chelating Agents
- Saliva, Artificial
- Silicic Acid
- hexafluorosilicate
- calcium phosphate
- Edetic Acid
- Fluorides
|
Topics |
- Adult
- Calcium Phosphates
(chemistry)
- Chelating Agents
(pharmacology)
- Chemical Precipitation
- Dentin
(drug effects, ultrastructure)
- Dentin Permeability
(physiology)
- Dentin Sensitivity
(physiopathology)
- Edetic Acid
(pharmacology)
- Electron Probe Microanalysis
- Fluorides
(chemistry)
- Humans
- Materials Testing
- Microscopy, Electron, Scanning
- Saliva, Artificial
(chemistry)
- Silicic Acid
(chemistry)
- Smear Layer
- Time Factors
|