title: Condyle Excursion Angle, Articular Eminence Inclination, and Temporomandibular Joint Morphologic Relations With Disc Displacement.
abstract: OBJECTIVE
  The aim of this study was to evaluate the relations of the condyle excursion angle (CEA) and the morphology and morphometry of the articular eminence to disc displacement (DD) using magnetic resonance imaging (MRI) of symptomatic patients.
  
  
  METHODS
  MRIs of 199 temporomandibular joints (TMJs) were evaluated. Qualitative and quantitative morphologic analyses were performed with tools available in PACS 11.0 (Carestream Health, Inc, Rochester, NY). The articular eminence inclination (AEI), eminence height (EH), CEA, and articular eminence morphologic shape were evaluated. Statistical analyses were used to evaluate any possible association of the variables with DD in the closed- and open-mouth positions, age, and gender. The significance level was set at .05.
  
  
  RESULTS
  Elderly women (>60 yr) presented higher prevalence values (43.26%). There was no statistical correlation between DD and gender (P = .4290). Higher mean values of the AEI and EH were associated with box-shaped eminences. The EH, AEI, and CEA were not related to the presence or absence of DD and the different types of DD. The AEI (P = .002) and CEA (P < .001) values were higher for TMJs with disc reduction in the open-mouth position.
  
  
  CONCLUSIONS
  Disc position in the closed- and open-mouth positions is not influenced by articular eminence morphology; however, the AEI and CEA have an influence on disc reduction.
authors.affiliation: Private Practitioner, Department of Oral Diagnosis, State University of Paraíba, Campina Grande, PB, Brazil.
authors.forename: Katharina Alves
authors.initials: KA
authors.lastname: Rabelo
authors.affiliation: Clinical Assistant Professor, Department of Oral Pathology, Radiology and Medicine, The University of Iowa, Iowa City, IA.
authors.forename: Saulo Leonardo
authors.initials: SL
authors.lastname: Sousa Melo
authors.affiliation: Private Practitioner, Department of Radiology, School of Dentistry, Federal University of Bahia, Salvador, BA, Brazil.
authors.forename: Marianna Guanaes Gomes
authors.initials: MGG
authors.lastname: Torres
authors.affiliation: Professor, Department of Radiology, School of Dentistry, Federal University of Bahia, Salvador, BA, Brazil.
authors.forename: Paulo Sérgio F
authors.initials: PSF
authors.lastname: Campos
authors.affiliation: Professor, Department of Oral Diagnosis, State University of Paraíba, Campina Grande, PB, Brazil.
authors.forename: Patrícia Meira
authors.initials: PM
authors.lastname: Bento
authors.affiliation: Professor, Department of Oral Diagnosis, State University of Paraíba, Campina Grande, PB, Brazil. Electronic address: daniela@radiologia.odo.br.
authors.forename: Daniela Pita de
authors.initials: DP
authors.lastname: Melo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013704:Temporomandibular Joint / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000473:pathology*; D019224:Temporomandibular Joint Disc / Q000000981:diagnostic imaging* / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000000981:diagnostic imaging; D055815:Young Adult