Effects of ammonium hexafluorosilicate concentration on dentin tubule occlusion and composition of the precipitate.

Abstract

UNLABELLED:

Ammonium hexafluorosilicate [SiF: (NH(4))(2)SiF(6)] was prepared in order to overcome the tooth discoloration caused by diamine silver fluoride [AgF: (NH(3))(2)AgF] application. We employed a single concentration of SiF solution in our previous study; therefore, it is still unclear how the concentration of SiF solution affects the occlusion of dentin tubules and composition of the precipitate.

OBJECTIVE:

The aim of this study was to evaluate the effects of changing the concentration of SiF on its clinical use as a dentin hypersensitivity treatment.

METHODS:

To simulate dentin tubules subject to dentin hypersensitivity, dentin disks were treated with EDTA for 2 min. Then, the disks were treated with several concentrations of SiF solution (from 100 to 19,400 ppm) for 3 min. The occlusion of dentin tubules was evaluated using scanning electron microscopy (SEM), and the composition of the precipitate formed in the tubules after SiF treatment was assessed using energy dispersive X-ray analysis (EDXA).

RESULTS:

SEM photographs demonstrated that dentin tubules after treatment with SiF were occluded homogeneously and fully regardless of the concentration of SiF solution. The Ca/P molar ratio of the precipitate formed in dentin tubules after SiF treatment was increased with the concentration of SiF solution.

SIGNIFICANCE:

It was concluded that the capacity to occlude dentin tubules was the same regardless of the concentration of SiF solution. However, the composition of the precipitate formed in the tubules was dependent on the concentration of SiF solution.

• 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. 26 Issue 1 Pg. 29-34 (Jan 2010) ISSN: 1879-0097 [Electronic] England
• PMID: 19748664 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Ammonium Compounds
• Dentin Desensitizing Agents
• Fluorides, Topical
• Quaternary Ammonium Compounds
• Silicon Compounds
• Silver Compounds
• Silicic Acid
• Phosphorus
• silicon fluoride
• ammonium fluoride
• hexafluorosilicic acid
• silver diamine fluoride
• Fluorides
• Calcium

Topics

• Ammonium Compounds
• Calcium (analysis)
• Chemical Precipitation
• Dentin (drug effects, ultrastructure)
• Dentin Desensitizing Agents (administration & dosage, adverse effects, chemistry)
• Dentin Permeability (drug effects)
• Dentin Sensitivity (drug therapy)
• Electron Probe Microanalysis
• Fluorides (administration & dosage, chemistry, therapeutic use)
• Fluorides, Topical
• Humans
• Hydrogen-Ion Concentration
• Materials Testing
• Microscopy, Electron, Scanning
• Phosphorus (analysis)
• Quaternary Ammonium Compounds (administration & dosage, adverse effects, chemistry)
• Silicic Acid (administration & dosage, chemistry)
• Silicon Compounds (chemistry, therapeutic use)
• Silver Compounds
• Time Factors
• Tooth Discoloration (chemically induced)