Toothbrush age and wear as it relates to plaque control*

Abstract

An investigation was conducted to test the hypothesis that age and wear of toothbrushes do not affect plaque removal. 40 preclinical dental students between the ages of 19 and 26 years were assigned randomly to 2 groups. 1 group of 19 subjects used a toothbrush for 10 weeks while the 21 subjects in the other group were given new toothbrushes every 2 weeks for 10 weeks. A baseline of zero plaque and calculus was obtained on the first visit. On subsequent visits, 2 weeks apart, the gingival status of each group was evaluated using the gingival index, and plaque levels were scored using the patient hygiene performance index. The brushing surface area of the toothbrushes was measured with a caliper as well as being graded subjectively according to their condition (good, fair or poor). Results were statistically analysed at the end of the 10-week period. It was found that after 10 weeks, the subjects using the same toothbrush for the whole period had significantly more plaque than those who replaced their brushes every 2 weeks. As brushes deteriorated, they became less effective. No differences in gingival state were detected. There was appreciable variation in toothbrush wear among subjects, some reducing their brush to a poor state in 2 weeks whereas with others the brush was rated as "good" after 10 weeks.

Effect of toothbrushing on shade and surface roughness of extrinsically stained pressable ceramics

“…Second, the current American Dental Association recommendation for toothbrush replacement is every 3 to 4 months. 26 This frequency could change the results of the present study. However, in the present study, the slurry and toothbrushes were replaced after every 3 years of simulated toothbrushing because of experimental design and time management.…”

Australian dentists' views on toothbrush wear and renewal

“…The only investigation which has evaluated the effect of toothbrush renewal intervals on the efficiency of plaque control found that subjects who renewed toothbrushes every two weeks exhibited better plaque control than those who used the same brush for the 10-week period of the study. 7 To date, no studies have been published which show two-three months to be the optimal renewal period for a toothbrush. Most respondents did not recommend to their patients when toothbrushes should be renewed despite the majority feeling that patients should renew toothbrushes more often.…”

Is Plaque Removal Efficacy of Toothbrush Related to Bristle Flaring? A 3-month Prospective Parallel Experimental Study

“…On the contrary, other studies concluded that there is no significant difference in plaque scores were achieved by the subjects with the highest toothbrush wear in comparison to those subjects with the lowest toothbrush wear (13, 14). However, another study has recommended that toothbrushes be replaced frequently to ensure optimal plaque control (15). …”