Determination of Caries Lesion Activity: Reflection and Roughness for Characterization of Caries Progression

Author:

Ando M1,Shaikh S2,Eckert G3

Affiliation:

1. Masatoshi Ando, DDS, PhD, Department of Cariology, Operative Dentistry and Dental Public Health, Indiana University School of Dentistry, Indianapolis, IN, USA

2. Sameer Shaikh BDS, MSc Orthodontics, Department of Orthodontics, Guy's Hospital, Kings College London, Great Maze Pond, London, UK

3. George J Eckert, MAS, Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA

Abstract

SUMMARY Caries lesion progression is difficult to determine with visual and tactile examinations. The hypothesis of this study was that reflection and roughness measurements could determine caries progression. Ground/polished sound human enamel specimens were analyzed at baseline (sound) and after two four-day demineralization periods for reflection using optical reflectometry (ORef) and for roughness using optical surface profilometry (SPro). Specimens were demineralized using a microbial–Streptococcus mutans aries model. Comparisons among the periods for ORef and SPro were performed using repeated measures analysis of variance. Two-sample t-tests were used for differences in transverse microradiography. The integrated mineral loss and depth of the four-day demineralization period were significantly smaller than those for the eight-day demineralization period (p<0.01). With increased demineralization time, reflection was significantly decreased and roughness was significantly increased (p<0.01). Correlation between ORef and SPro was moderate (r=−0.63). Both reflection and roughness can be characterized for nondestructive longitudinal assessment of caries lesion progression.

Publisher

Operative Dentistry

Subject

General Dentistry

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