title: Primary headaches interfere with the efficacy of temporomandibular disorders management.
abstract: OBJECTIVE
  This cross-sectional study aimed to evaluate the influence of Primary Headache (PH) on efficacy of a Temporomandibular Disorders (TMD) conservative therapy and its association with the presence of self-reported parafunctional habits.
  
  
  METHODS
  Sample was composed of 400 medical records, divided into four groups: I) Muscular TMD (n = 64); II) Muscular TMD+PH (n = 48); III) Muscular TMD+Articular TMD (n = 173); IV) Muscular TMD+Articular TMD+PH (n = 115). All groups had undergone a TMD therapy for three months with a stabilization appliance and counseling for habits and behavioral changes, with no specific headache management. Current pain intensity and existence or not of self-reported bruxism were assessed. Repeated measures ANOVA and Chi-Square test followed by Odds were used for statistical analysis, with a significance level of 5%.
  
  
  RESULTS
  results of this study showed that: (1) A conservative therapy with stabilization appliance and counseling for habits and behavioral changes was effective in the TMD pain relief; (2) Groups with an additional diagnosis of PH had worsened the pain improvement significantly; and (3) no association between the presence of self-reported bruxism and PH was found.
  
  
  CONCLUSIONS
  this study could elucidate the important effect that headache may have on the TMD management.
authors.affiliation: Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
authors.forename: André Luís
authors.initials: AL
authors.lastname: Porporatti
authors.affiliation: Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
authors.forename: Yuri Martins
authors.initials: YM
authors.lastname: Costa
authors.affiliation: Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
authors.forename: Paulo César Rodrigues
authors.initials: PC
authors.lastname: Conti
authors.affiliation: Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
authors.forename: Leonardo Rigoldi
authors.initials: LR
authors.lastname: Bonjardim
authors.affiliation: Department of Dentistry, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Patrícia dos Santos
authors.initials: Pdos S
authors.lastname: Calderon
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D004812:Epidemiologic Methods; D005157:Facial Pain / Q000503:physiopathology / Q000628:therapy; D005260:Female; D051270:Headache Disorders, Primary / Q000150:complications* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D010147:Pain Measurement; D020186:Sleep Bruxism / Q000503:physiopathology; D013705:Temporomandibular Joint Disorders / Q000503:physiopathology* / Q000628:therapy*; D013997:Time Factors; D016896:Treatment Outcome