CO2 laser improves 45S5 bioglass interaction with dentin.

Abstract

Bioglass 45S5 is a bioactive glass that can create a layer of calcium-phosphate crystals on mineralized hard tissues. In this study, 45S5 bioglass was mixed with phosphoric acid and irradiated with CO(2) laser and examined as a possible aid in the treatment of dentin hypersensitivity. The dentinal surface modified by the aforementioned technique was chemically and micro-morphologically examined with a field emission scanning electron microscope (FE-SEM) equipped with an energy-dispersive x-ray spectroscope (EDS), and the crystalline structures of the examined dentinal surfaces were examined by x-ray diffraction (XRD). Moreover, the mechanical properties of the newly formed layer were examined by nanoindentation. The results showed that 45S5 bioglass could occlude the dentinal tubule orifices with calcium-phosphate crystals. The application of CO(2) laser potentially improved the mechanical organization of these crystals.

• Authors: A S Bakry, H Takahashi, M Otsuki, A Sadr, K Yamashita, J Tagami
• Journal: Journal of dental research (J Dent Res) Vol. 90 Issue 2 Pg. 246-50 (Feb 2011) ISSN: 1544-0591 [Electronic] United States
• PMID: 21084716 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Calcium Phosphates
• Dentin Desensitizing Agents
• bioactive glass 45S5
• Water
• calcium phosphate

Topics

• Calcium Phosphates
• Ceramics (therapeutic use)
• Crystallography, X-Ray
• Dentin (chemistry, ultrastructure)
• Dentin Desensitizing Agents (therapeutic use)
• Dentin Sensitivity (drug therapy)
• Elastic Modulus
• Glass
• Hardness
• Humans
• Lasers, Gas (therapeutic use)
• Microscopy, Electron, Scanning (instrumentation)
• Spectrometry, X-Ray Emission
• Water