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[Changes of dentin matrices during carious process].

Y H Lin

    Tsurumi Shigaku. Tsurumi University Dental Journal
    |January 1, 1989
    PubMed
    Summary
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    Demineralization of human dentin with acids affects its organic matrix. During dental caries, phosphophoryn is lost, and amino acid composition changes, particularly in lower-density fractions.

    Area of Science:

    • Biochemistry
    • Dental Science

    Context:

    • Investigates the organic matrix of human dentin under demineralization.
    • Examines changes during the natural carious process.

    Purpose:

    • To analyze the effects of lactic acid and acetic acid on dentin's organic components.
    • To understand the alterations in dentin's matrix during caries progression.

    Summary:

    • Demineralization with lactic or acetic acid extracts non-collagenous proteins and collagen from sound dentin.
    • Lactic acid extracts more phosphophoryn-containing proteins than acetic acid; EDTA removes phosphophoryn from sound dentin.
    • Carious dentin shows reduced phosphophoryn, suggesting loss during caries. Lower density fractions have more non-collagenous proteins.
    • Amino acid analysis reveals isoleucine in carious dentin, with increased amounts in lower-density fractions.

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    Impact:

    • Provides insights into the biochemical changes in dentin during demineralization and caries.
    • Highlights the role of phosphophoryn loss in the carious process.
    • Identifies specific amino acid changes associated with dentin demineralization and caries.