Automatic and hand toothbrushing abrasion studies

Abrasion of restorative materials by toothpaste

“…Sevriton, the unfilled resin material had the highest abrasion rate of all from 18-30 x 10 ^mm^, which is between 20 and 60 times higher than that of enamel. These results are in general agreement with those of previous investigations (Harrington & Terry, 1964, Peterson, Phillips & Swartz, 1966. However, it must be emphasized that important factors such as intermittent brushing have not been investigated.…”

Abrasion and stain removal by different manual toothbrushes and brush actions: studies in vitro

“…Thus, as concluded by other authors (Phaneuf et al 1962, Harrington & Terry 1964, Dyer et al 2000, 20 000 strokes of a toothbrush represents several years of brushing individual tooth surfaces. Thus, the Total brush produced one quarter of the abrasion of the prototype brush with a rotary motion but almost the same with a linear motion.…”

“…It has been established from several studies that nylon filament toothbrushes alone have negligible effects on hard substrates including acrylic and dentine (Manly & Brudevold 1956, Harrington & Terry 1964, Absi et al 1992, Dyer et al 2000; the major abrasion being imparted by the toothpaste carried on the brush (Davis 1978). Previous studies have indicated that brushes appear to differ in the carriage of toothpaste and the resultant abrasion of the substrate under test (Phaneuf et al 1962, Dyer et al 2000.…”

Evaluation of two soft manual toothbrushes with different filament designs in relation to gingival abrasion and plaque removing efficacy

“…Soft filaments seems to clean better than hard filaments because of the ‘matting effect’ produced by the combination of soft filaments and dentifrice. This increases tooth‐dentifrice contact and adds the cleasing action, but could also increase tooth abrasion (3). However, the filament must be sufficiently stiff so that during brushing enough pressure is exerted to remove the plaque.…”