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  • Title: Comparison of methods for measurement of hypoplastic lesions.
    Author: Elcock C, Smith RN, Simpson J, Abdellatif A, Bäckman B, Brook AH.
    Journal: Eur J Oral Sci; 2006 May; 114 Suppl 1():365-9; discussion 375-6, 382-3. PubMed ID: 16674714.
    Abstract:
    Enamel hypoplasia is a quantitative defect of enamel thickness. Methods previously used for its measurement have limitations in clinical studies. The aim of this study was to investigate new methods of measurement using image analysis. Lesions on 8 teeth affected by enamel hypoplasia were quantified from study models and impression surfaces using an image-analysis system. The measurements made included lesion area and tooth surface area; from these the proportion of tooth surface area affected was calculated. For comparison, manual measurement was performed on impression surfaces and study models, using digital callipers. Images were also acquired of lesions on 12 exfoliated teeth, and the lesion area and total tooth area were calculated. For assessment of intra-operator reliability, the +/-repeatability coefficient was calculated. Measurement of the surface of lesions direct from the exfoliated teeth gave the best results overall, followed by direct image analysis of the silicone impression.
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