The Journal of clinical dentistry
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Comparative Study
A comparison of the end-rounding of nylon bristles in commercial toothbrushes: Crest Complete and Oral-B.
Nylon bristle end-rounding provides important soft tissue benefits to modern toothbrushes. In these studies, the proportion of acceptably end-rounded bristles have been compared for a new rippled bristle design toothbrush (Crest Complete) and a flat bristle control toothbrush (Oral-B). Toothbrush bristles were examined using a stereomicroscope by a grader blind to brush type and assigned empirical grades of acceptable/unacceptable based upon the Silverstone and Featherstone scale used previously in the literature (1988). ⋯ In both soft and medium texture brushes, bristles in Crest Complete demonstrated 89% acceptable end-rounding. These results were significantly different (p less than 0.0001) from those found for the control toothbrush, where 53 and 51% acceptable end-rounding was observed. These results demonstrate the newly designed rippled bristle brush (Crest Complete) exhibits excellent end-rounding.