Department of Paediatric Dentistry, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of lran.
East Mediterr Health J. 2011 Feb;17(2):115-20.
The cost of replacing toothbrushes at frequent intervals may be prohibitive in underdeveloped countries. The objective of this study in Tehran was to compare the plaque removal efficacy of new and 3-month-old toothbrushes in children. In a randomized, crossover study, 93 children aged 7-9 years old received a new manual toothbrush to use twice per day for 3 months. Plaque scores were measured using the modified Quigley-Hein plaque index after children had brushed for 60 seconds with either a new or their used toothbrush. Bristle wear of worn brushes was assessed by measuring brushing surface areas on digital images. Compared with new brushes in the same subjects, no statistically significant differences were found for plaque score reductions for 3-month-old toothbrushes exhibiting various degrees of wear. Worn toothbrushes are equally effective as new ones for children.
在欠发达国家，频繁更换牙刷的成本可能过高。本研究的目的是比较新牙刷和使用 3 个月后的牙刷在儿童中的菌斑去除效果。在一项随机交叉研究中，93 名 7-9 岁的儿童使用新的手动牙刷，每天刷牙两次，持续 3 个月。使用改良的 Quigley-Hein 菌斑指数在儿童使用新牙刷或旧牙刷刷牙 60 秒后测量菌斑评分。使用数字图像测量刷毛磨损情况来评估磨损牙刷的刷毛磨损。与同一受试者的新牙刷相比，磨损程度不同的 3 个月旧牙刷的菌斑评分降低没有统计学差异。磨损的牙刷对儿童来说与新牙刷同样有效。
