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Am J Dent. 1995 Feb;8(1):5-9.

Surface morphology and chemical characterization of abrasion/erosion lesions.

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1
Department of Restorative Dentistry, University of Missouri-Kansas City, School of Dentistry 64108-2795, USA.

Abstract

PURPOSE:

To describe the dentin surface morphology of abrasion/erosion lesions and to chemically characterize in vivo samples of sclerotic dentin.

MATERIALS AND METHODS:

Baseline polyvinylsiloxane impressions of eight in vivo caries-free lesions were taken. Dentin was collected from retention grooves for FTIR photoacoustic spectroscopic analysis. The cavity preparation was etched for 30 seconds with 37% phosphoric acid, rinsed, and dried. Impressions were taken of the etched surfaces. Epoxy resin dies were made of baseline and etched impressions, sputter-coated and examined at x1000 with the SEM.

RESULTS:

Lateral dentin tubule orientation was observed at gingival margins and on occlusal walls. Open cross-sectional tubules were seen at the depth of the groove. The mineral/protein ratio in the FTIR/PAS spectra of in vivo unetched sclerotic dentin samples suggested an increased mineral content.

PMID:
7546475
[Indexed for MEDLINE]
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