学童における手用歯ブラシによる歯みがき圧および歯みがき動作の回数と歯垢清掃効果との関係について
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概要
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A study was made of 33 primary school pupils who brushed the labial surfaces of their upper anterior and posterior teeth using three kinds of manual toothbrushes different in the shape of the shank, the number of tufts and stiffness but the same in brushing plane (straight) and tufts (tufted design).<BR>The three kinds were the Rolling type toothbrush for pupils (stiffness is medium), Wakaba No. 1 toothbrush (stiffness is medium), and Wakaba No. 2 toothbrush (soft). The pupils followed their habitual brushing method for 20 seconds in each area.<BR>Quantitative determination were made of brushing force, brushing strokes per 20 seconds and percent of debris removal<BR>(debris index before brushing minus debris index after brushing/debris index before brushing times 100%)<BR>The debris removal effect due to the toothbrushing areas and toothbrushes was discussed on the basis of the relations between brushing force and the number of brushing strokes, and between the percent of debris removal and the product of brushing force times the number of brushing strokes.<BR>Brushing force in the pupils was 100-500g, which was less than in adults. The range of the number of strokes was 30-100 strokes per 20 seconds, which was the same as in adults.<BR>Differences in brushing force among the brushing areas were observed in adults, but not in the pupils.<BR>Habits in the pupils did not reflect individualities in brushing procedures as much as in adults.<BR>Some pupils (Fig. 2, Subjects A-G) showed more removal effect with a stiff toothbrush than with a soft toothbrush, while others (Subject O) showed the opposite result or similar data (Subjects L-N), that is, debris removal was related to not only brushing force but also to the number of brushing strokes.<BR>Brushing force and the number of strokes were inversely proportional among subjects who showed 100 percent debris removal, but were not necessarily so among pupils whose percent of debris removal was less than 100.<BR>The percent of debris removal was generally proportional to the product of brushing force times the number of brushing strokes.<BR>There was no difference in debris removal between adults and the pupils in brushing the labial surface of the upper teeth, which was easy to brush regardless of the skill of brushing procedures among the examinees of different ages.
- 有限責任中間法人 日本口腔衛生学会の論文