画像解析装置を用いたプラーク付着状態評価法の有用性

概要

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A computerized planimetric method (P%I) for measuring plaque adhesion area has been developed. The purpose of the present study is to evaluate intra- and inter-examiner reliability in assessing dental plaque by this method and the efficacy of the method itself. Correlation coefficient between intra-examiner and between 2 examiners were 0.99 and 0.92, respectively, which indicated significantly (p<0.001) high reproducibility. When plaque area was also measured by the Debris index (DI), Podshadley's patient hygiene performance index (PHP), Turesky modified Quigley-Hein plaque index (QHI), the Navy plaque index (NPI) on 221 tooth-surfaces in 18 volunteer students, significantly high correlation (r=0.80 to 0.84) was found between the P%I and these 4 indices. The P%I showed highest plaque reduction rate (40%), when plaque area in the same subjects was compared between before toothbrushing instruction and after instruction, although mean number of scores showed significant differences in all indices. These findings suggest that plaque adhesion assessment by a computerized planimetric method is highly effective in clinical investigations, especially in relatively small samples.
九州歯科学会の論文
1994-02-25