The measurement in vitro of dentine abrasion by toothpastes.
OBJECTIVE
To investigate the in vitro dentine wear after tooth brushing with a range of nine toothpastes.


METHODS
70 bovine dentine blocks (aproximately 1 cm long) were used. Specimens were brushed in vitro with toothpastes with a range of abrasive. All the specimens were submitted to 10,000 brushing cycles with a 200g load. Initial and final weight and profile data were obtained using an analytical scale and a profile projector respectively.


RESULTS
Significant differences between the test products were found (p < 0.05). The mean dentine wear ranged from 0.039 to 0.006g and 0.502 to 0.185mm, with the highest wear for the whitening toothpastes.


CONCLUSIONS
This study demonstrated that the type of toothpaste abrasive can contribute to dentine wear.
Vicentini
Bruna Carvalho
BC
Cidade Universitária, Departamento de Dentistica, Faculdade de Odontologia, Universidade de São Paulo, SP, Brasil.
Braga
Sheila Regina Maia
SR
Sobral
Maria Angela Pita
MA
D000818:Animals; D002417:Cattle; D003804:Dentin / Q000737:chemistry / Q000187:drug effects*; D014072:Tooth Abrasion / Q000139:chemically induced*; D014073:Tooth Bleaching / Q000009:adverse effects*; D014092:Tooth Root / Q000187:drug effects; D014099:Toothbrushing / Q000009:adverse effects*; D014100:Toothpastes / Q000009:adverse effects* / Q000737:chemistry
D014100:Toothpastes