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<p>of enamel are <a href="page.php?w=ameloblastin">ameloblastin</a>s, <a href="page.php?w=amelogenin">amelogenin</a>s, <a href="page.php?w=enamelin">enamelin</a>s and <a href="page.php?w=tuftelin">tuftelin</a>s. It is believed that they aid in the development of enamel by serving as framework support, among other functions. In rare circumstances enamel can fail to form, leaving the underlying dentin exposed on the surface.</p>

<p><big>Dentin</big></p>
<p>Dentin is the substance between enamel or cementum and the pulp chamber. It is secreted by the <a href="page.php?w=odontoblast">odontoblast</a>s</p><p>
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