title: Noncarious cervical lesions and their association with toothbrushing practices: in vivo evaluation.
abstract: OBJECTIVE
  This pilot study aims to investigate the prevalence of noncarious cervical lesions (NCCLs) in a student population at the Faculty of Dentistry of Araçatuba–UNESP and to assess the potential relation between buccal hygiene habits and the presence and number of NCCLs.
  
  
  METHODS
  This study was conducted with a sample of 58 young volunteers (15 men and 43 women; mean age, 23.6 ± 1.8 years and 22.3 ± 2.4 years, respectively). The research was divided into three steps: 1) clinical assessment; 2) oral-hygiene practices self-report questionnaire; and 3) analysis of toothbrush filament deformations. After the clinical exam the participants were divided into two groups, a control group (without NCCLs) and a test group (NCCLs), according to NCCL presence. The data were statistically analyzed with SPSS 16.0 software, using t-test, χ2, Fisher exact test, and Spearman correlation.
  
  
  RESULTS
  NCCLs were present in 53% of the subjects. The presence of NCCLs was marginally statistically associated with age (p=0.15) and proportionally more prevalent in male (80%) subjects (p=0.01). NCCLs were more concentrated in the posterior-superior quadrant (93%) in both the right (90%) and left (55%) sides of the mouth. The direct rank correlation was presented between presence of NCCLs and toothbrush firmness; and between number of NCCLs and age and force applied during toothbrushing.
  
  
  CONCLUSIONS
  Within the limitations of this pilot study, the use of medium and hard toothbrushes and greater force applied during toothbrushing might contribute to the development and/or aggravation of NCCLs.
authors.affiliation: Department of Surgery and Integrated Clinic, Univ Estadual Paulista, Brazil. brandini@foa.unesp.br
authors.forename: D A
authors.initials: DA
authors.lastname: Brandini
authors.forename: A L B
authors.initials: AL
authors.lastname: de Sousa
authors.forename: C I
authors.initials: CI
authors.lastname: Trevisan
authors.forename: L A P
authors.initials: LA
authors.lastname: Pinelli
authors.forename: S C
authors.initials: SC
authors.lastname: do Couto Santos
authors.forename: D
authors.initials: D
authors.lastname: Pedrini
authors.forename: S R
authors.initials: SR
authors.lastname: Panzarini
mesh_terms: D000328:Adult; D016009:Chi-Square Distribution; D003430:Cross-Sectional Studies; D004305:Dose-Response Relationship, Drug; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D010865:Pilot Projects; D012737:Sex Factors; D018709:Statistics, Nonparametric; D014072:Tooth Abrasion / Q000209:etiology*; D019237:Tooth Cervix / Q000473:pathology*; D014099:Toothbrushing / Q000009:adverse effects*; D055815:Young Adult