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Changes in Bovine Dentin Mineral with Sodium Hypochlorite Treatment

Department of Anatomy, Nihon University, School of Dentistry at Matsudo, Chiba 271, Japan

H. Mishima

Department of Anatomy, Nihon University, School of Dentistry at Matsudo, Chiba 271, Japan

Y. Kozawa

Department of Anatomy, Nihon University, School of Dentistry at Matsudo, Chiba 271, Japan

Dentin powders from bovine incisors were treated with 10% NaClO solution. Differential thermal analysis (DTA) indicated the removal of organic material from the dentin sample following the treatment, since the exothermic reaction at 320°C had disappeared. X-ray diffraction studies revealed a change in the crystallinity of the dentin crystals and the formation of calcite after the treatment. Infrared absorption analysis showed that the band due to carbonate ions was weakened after the treatment, while atomic absorption spectroscopic analysis showed that magnesium ions had been dissolved from the dentin sample. The a-axis lengths of treated and heated dentin samples differed from those of untreated and heated samples. Whitlockite was always found in the untreated/heated samples, whereas it was absent in the treated/heated samples. The unit cell dimensions of the whitlockite indicated the partial substitution of magnesium for calcium. Magnesium ions seemed to be more effective than carbonate ions in forming whitlockite. These results showed that some magnesium and carbonate ions were removed from the dentin crystal structure upon NaClO treatment, while at the same time organic materials were removed from the dentin sample. It was suggested that crystals in the NaClO-treated dentin were similar to enamel crystals from a crystallographic viewpoint.

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Journal of Dental Research, Vol. 67, No. 9, 1229-1234 (1988)
DOI: 10.1177/00220345880670091601


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Sakae, T. Articles by Kozawa, Y. Search for Related Content PubMed PubMed Citation Articles by Sakae, T. Articles by Kozawa, Y. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Medline Plus Health Information Minerals Hazardous Substances DB SODIUM HYPOCHLORITE Social Bookmarking                         What's this?