Department of Periodontology, Academic Centre for Dentistry, Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, the Netherlands.
Int J Dent Hyg. 2013 Nov;11(4):237-43. doi: 10.1111/idh.12021. Epub 2013 Mar 18.
The present study assessed whether 3-month-old used manual toothbrushes are less effective in reducing plaque scores compared with new toothbrushes with or without the use of dentifrice.
The present study was performed employing a single-use, examiner-blinded, professional brushing model. Four brushing modalities were randomly allocated to one of four quadrants, that is, 3-month-old used toothbrushes and new toothbrushes both with and without the use of dentifrice. Prebrushing and post-brushing plaque scores (Quigley Hein plaque index) and gingival abrasion (GA) scores were obtained. A dental hygienist performed the professional brushing procedure. The 3-month-old used toothbrushes were assessed for wear.
No significant differences were observed among the treatments with regard to the prebrushing scores. The post-brushing plaque scores ranged from 1.59 for the new brush with dentifrice to 1.76 for the old brush with dentifrice. There was a significant difference (P = 0.036) among the four treatments regarding the old brush with dentifrice, which removed less plaque than the other treatment modalities. Regarding GA scores, no significant differences were observed. With regard to toothbrush wear after 3 months of use, the scores varied widely among the individually evaluated brushes.
The present study did not show a clinically relevant difference in plaque score reductions following a 2-minute brushing exercise among 3-month-old used and new manual toothbrushes. However, the wear rate of the brushes seemed to be the determining factor in loss of efficacy, rather than the age of the toothbrush. Furthermore, dentifrice did not show an additional effect on instant plaque removal.
本研究评估了使用 3 个月的手动牙刷与使用或不使用牙膏的新牙刷相比，在减少牙菌斑评分方面是否效果较差。
本研究采用单次使用、 examiner-blinded、专业刷牙模型进行。将四种刷牙模式随机分配到四个象限之一，即使用 3 个月的旧牙刷和新牙刷，同时使用或不使用牙膏。在刷牙前和刷牙后分别获得菌斑评分（Quigley Hein 菌斑指数）和牙龈磨损（GA）评分。由一名口腔卫生师进行专业刷牙程序。对使用 3 个月的旧牙刷进行磨损评估。
在刷牙前评分方面，不同处理方法之间没有观察到显著差异。刷牙后菌斑评分范围从使用牙膏的新牙刷的 1.59 到使用牙膏的旧牙刷的 1.76。在使用牙膏的旧牙刷方面，四种处理方法之间存在显著差异（P=0.036），其去除的菌斑少于其他处理方法。关于 GA 评分，没有观察到显著差异。关于使用 3 个月后的牙刷磨损情况，各个评估牙刷的评分差异很大。
本研究未显示在 2 分钟刷牙运动后，使用 3 个月的旧手动牙刷和新牙刷在减少牙菌斑评分方面存在临床相关差异。然而，牙刷的磨损率似乎是功效丧失的决定因素，而不是牙刷的年龄。此外，牙膏并没有在即时去除牙菌斑方面显示出额外的效果。
