:Compared with the conventional toothbrush in which the bristles are anchored to the brush head, the anchorless toothbrush has a thinner brush head and it is considered to be easier in the mouth. We report herein on a clinical evaluation between two types of novel anchorless toothbrush. The purpose of this study was to compare the plaque removal efficacy of three toothbrushes used in the scrubbing brushing method: Toothbrush S had a 2.5 mm brush head thickness, 9.0 mm bristle height and end-tapered bristles with an anchorless brush filling; Toothbrush N had a 5.0 mm brush head thickness, 9.0m m bristle height and end-tapered bristles; and Toothbrush M had a 2.9 mm brush head thickness, 9.5 mm bristle height and end-rounded bristles with anchorless brush filling. Plaque was evaluated on 12 teeth which consisted of Ramfjörd teeth (16,21,24,36,41,44) and the other molars (17,26,27,37,46,47). As the subjects with the standardized tooth brushing technique, 26 students in the second year of the dental hygienist course were enrolled in this study. The results showed that the rate of plaque reduction of toothbrush S was the highest followed by those of toothbrush N and toothbrush M in decreasing order. Especially in molars, toothbrush S (46.9 %) showed a higher rate of 連絡先:小川智久 〒 102-8158 東京都千代田区富士見 2-3-16
:We hypothesized that analysis of mouth air would be indicative of not only periodontal status but also populations of periodontal pathogens in periodontal pockets. Oral malodour and volatile sulphur compounds (VSCs) concentrations in mouth air from 30 subjects were examined by electronic nose, gas chromatography and organoleptic tests. Several periodontal parameters were also recorded. Periodontal pathogens, i.e. P. gingivalis, A. actinomycetemcomitans, T. forsythia, P. intermedia and T. denticola were analyzed in saliva, tongue coating and subgingival plaque by real-time PCR. The following results were obtained. 1. The max probing pocket depth (PD) was significantly correlated with oral malodour expressed as organoleptic score, total mode of electronic nose and CH 3 SH/H 2 S ratio. 2. Total measurement mode of electronic nose, CH 3 SH/H 2 S ratios significantly correlated with total level of the microorganisms in subgingival plaque (adjusted R 2 =0.690,p< 0.027). A significant positive correlation was demonstrated between the actual measurement value and the forecast value of the total level of the five periodontopathic microorganisms in subgingival plaque (R 2 =0.447, p<0.001). Electronic nose measurements or CH 3 SH/H 2 S ratio would be a practical indicator of periodontal health status. Mouth-air analysis might indicate the level of periodontopathic microorganisms in periodontal pockets.
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