title: Temporomandibular disorders and quality of life among 12-year-old schoolchildren.
abstract: OBJECTIVE
  The aim of this study was to investigate the association between symptoms of temporomandibular disorders (TMD), quality of life, and malocclusion.
  
  
  METHODS
  A cross-sectional observational design study was utilized among 248 schoolchildren aged 12 years old. Symptoms of TMD were assessed using the Orofacial Pain and Temporomandibular Disorders Triage Questionnaire, and subjects were further evaluated as oral-health-related quality of life (CPQ11-14), tooth clenching/grinding and malocclusion (Dental Aesthetic Index). Chi-square for independence, Odds Ratio and Mann-Whitney test were used (p = 0.05) statistically.
  
  
  RESULTS
  Statistically, association was detected between TMD symptoms with pain and worse quality of life (p < 0.0138), and pain with quality of life and clenching/grinding (p = 0.0120 and 0.0007).
  
  
  CONCLUSIONS
  The symptoms of TMD are associated with pain and teeth clenching, causing a negative impact on schoolchildren's quality of life; thus, a study of the TMD impact on quality of life is justified.
authors: b Araras Dental School , Uniararas , Araras , Brazil.
authors: Marina de Faria
authors: MF
authors: da Silva
authors: a Department of Orthodontics, Araras Dental School , Uniararas , Araras , Brazil.
authors: Silvia A S
authors: http://orcid.org/0000-0002-7203-2867
authors: SAS
authors: Vedovello
authors: a Department of Orthodontics, Araras Dental School , Uniararas , Araras , Brazil.
authors: Mario
authors: M
authors: Vedovello Filho
authors: a Department of Orthodontics, Araras Dental School , Uniararas , Araras , Brazil.
authors: Giovana C
authors: GC
authors: Venezian
authors: a Department of Orthodontics, Araras Dental School , Uniararas , Araras , Brazil.
authors: Heloísa C
authors: HC
authors: Valdrighi
authors: a Department of Orthodontics, Araras Dental School , Uniararas , Araras , Brazil.
authors: Viviane V
authors: VV
authors: Degan
mesh_terms: D002012:Bruxism / Q000503:physiopathology; D002648:Child; D003430:Cross-Sectional Studies; D005157:Facial Pain / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000503:physiopathology*; D011788:Quality of Life; D011795:Surveys and Questionnaires; D013705:Temporomandibular Joint Disorders / Q000503:physiopathology*
keywords: Quality of life; malocclusion; temporomandibular disorder