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KMID : 0363019880180020186
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Journal of Korean Academy of Periodontology
1988 Volume.18 No. 2 p.186 ~ p.197
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A study of the plaque-removing ability and harmful effect on different types of toothbrushes
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Choi Hyun-Su
Lee Man-Seop
Kwon Young-Hyuk
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Abstract
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The purpose of this study was to determine the plaque-removing ability and harmful effect of different types of toothbrushes. Available seven toothbrushes which could be sold at market were examined its designs and sizes, and bristle end shapes were examined by stereoscope. Seven individuals (5 males, 2 females; 21 yrs. to 26 yrs) accustomed to scrubbing method were selected for this study. In the experimental periods, the individual was rotated so that all seven individuals used all seven brushes in different sequences by Latin method. Thus, the effect of a possible improvement of the brushing technique during the experiment was identical for all seven brushes. The interval between two subsequent phases was one week. Following the tooth brushing by scrubbing method during seven weeks, observation for the plaque removing ability and harmful effect were analyzed statistically. The results were as follows; 1. The morphologic changes of bristle head had no effect on plaque-removing ability. 2 Nylon bristles were statistically higher than natural bristles in plaque-removing ability. 3. The plaque-removing ability of the toothbrush bristles with rounded ends were higher than those of other toothbrushes, but did not show a statistically significance one another. 4. The average removal rate of plaque by scrubbing method was 66.5 % and that was highest (73.8 %) at the labio-buccal areas, secondary at the proximal area, lowest (57 6 %) at the palato-lingual areas. 5. Toothbrushes with round end shape did not show harmful effect, but toothbrushes with rough andirregular end shape showed harmful effect including gingival trauma and bleeding.
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