抄録
Removal of dental plaque is the most important measure for successful periodontal treatment. The control of the plaque which accumulates on the distal surfaces of the most posterior teeth is very difficult, because commonly used toothbrush is very hardly reached to the area. Recently we came up a new type of toothbrush which is suited to remove the dental plaque of distal surfaces of the most posterior teeth. Purpost of this study was to know the effect of the newly-designed toothbrush on the removal of the dental plauqe accumulated on the most distal surfaces. Fifteen adults were used for this study. The distal surfaces of the most posterior teeth were disclosed and photographed. Each subject was instructed how to use the new type of toothbrush, and also practiced scrub technique with Perio Mk. Afted 5, 10, 15 and 20 brushing strokes with either of these two methods, photographs were taken. The macrophotographs obtained were projected on the section paper. The extention of plaque and dental surfaces were recorded and evaluated the effectiveness of plaque removal with two different kinds of toothbrush. Results were as follow; (1) There was not significant difference between two type of the toothbrush concerning with the removal of plaque at first five brushing strokes. (2) After 10 strokes, newly designed toothbrush was shown significantly superior to remove the dental plaque. (3) 15 brushing strokes were required to remove completely plaque of the most distal surface. It can be concluded that a newly-designed toothbrush was more effective for plaque removal on the distal surfaces of the most distal molars.
