Novel Brush and ADA Reference Brush Bristles Novel Brush Specifications: 14 tufts (outer rows - white bristles) end rounded bristles - 9mm and 11mm in length (outer rows are cut at an angle so there are lengths in between these two measurements) 20 tufts (i... Novel Brush and ADA Reference Brush Bristles Novel Brush Specifications: 14 tufts (outer rows - white bristles) end rounded bristles - 9mm and 11mm in length (outer rows are cut at an angle so there are lengths in between these two measurements) 20 tufts (inner rows - green bristles) tapered bristles - tapered bristle length is 13mm Ruth E. Conn et al. J Dent Hyg 2017;91:32-39 ©2017 by American Dental Hygienists Association