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Root surface carious lesions on 99 teeth were evaluated as to morphologic distribution and histopathologic classification. Most lesions occurred on proximal surfaces and approximately 70% microscopically demonstrated carious progression characterized by dentinal tubular matrix destruction. Confirmation of the occurrence of a densely-mineralized surface layer was obtained by microradiography, as well as hypermineralization of dentinal tubules beneath the lesion.
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Westbrook et al. (2009) studied this question.
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