Journal of Radioanalytical Chemistry

, Volume 67, Issue 1, pp 75–82 | Cite as

Cleaning time and fate of phosphoric acid as conditioning agent on human dental enamel and dentin. An in vitro radiotracer study

  • M. Nagi
  • A. Alian
Article

Abstract

In this study the cleaning time and fate of phosphoric acid on human dental enamel and dentin has been investigated, using the radioactive tracer technique with32P as an indicator of phosphorus. Twenty seconds were found to be sufficient for cleaning the enamel from phosphoric acid, which is used for conditioning, and from formulations produced from its interaction with enamel. It was also found that dentin protection is necessary before conditioning with phosphoric acid due to the retention penetration of the latter through subsurface dentinal tubules. In addition, there seems to be an interaction between phosphoric acid and Ca(OH)2 leading to the formation of a sparingly soluble compound.

Keywords

Phosphoric Acid Count Rate Calcium Hydroxide Enamel Surface Dentinal Tubule 

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Copyright information

© Akadémiai Kiadó 1981

Authors and Affiliations

  • M. Nagi
    • 1
  • A. Alian
    • 2
  1. 1.Faculty of Oral and Dental MedicineCairo UniversityCairo(Egypt)
  2. 2.National Centre for Radiation Research and TechnologyAtomic Energy EstablishmentCairo(Egypt)

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