title: The measurement in vitro of dentine abrasion by toothpastes.
abstract: 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.
authors.affiliation: Cidade Universitária, Departamento de Dentistica, Faculdade de Odontologia, Universidade de São Paulo, SP, Brasil.
authors.forename: Bruna Carvalho
authors.initials: BC
authors.lastname: Vicentini
authors.forename: Sheila Regina Maia
authors.initials: SR
authors.lastname: Braga
authors.forename: Maria Angela Pita
authors.initials: MA
authors.lastname: Sobral
mesh_terms: 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
chemical_list: D014100:Toothpastes