title: TMJ vibrations in asymptomatic patients using old and new complete dentures.
abstract: OBJECTIVE
  The aim of this study was to assess the presence of temporomandibular joint (TMJ) noises in subjects with severe bone resorption, who have worn the same complete dentures for over 10 years, and 5 months after treatment with increments of acrylic resin on the occlusal surface after having new dentures in place.
  
  
  METHODS
  After applying the research diagnostic criteria (RDC)/temporomandibular disorder (TMD) questionnaire, 20 asymptomatic subjects were assessed before and 5 months after the new dentures were put in place. Joint vibrations were assessed by the Sono Pak program by selecting the vibrations that occurred during the opening and closing cycle.
  
  
  RESULTS
  The means of the results revealed a nonnormal distribution and were submitted to Kruskal-Wallis statistical analysis (p < 0.05). The vibration means were of low intensity (< or =9.96 Hz). After rehabilitation, there was a reduction in the vibrations (< or =5.2 Hz) statistically significant only at the end of mouth opening with the old dentures when compared with the other cycles.
  
  
  CONCLUSIONS
  The intensity and number of occurrences of joint vibrations were reduced after 5 months of wearing new dentures.
authors.affiliation: Department of Dental Materials and Prosthodontics, UNESP, São Paulo State University, São Paulo, Brazil. goiato@foa.unesp.br
authors.forename: Marcelo Coelho
authors.initials: MC
authors.lastname: Goiato
authors.forename: Alício Rosalino
authors.initials: AR
authors.lastname: Garcia
authors.forename: Daniela Micheline
authors.initials: DM
authors.lastname: dos Santos
authors.forename: Aldiéris Alves
authors.initials: AA
authors.lastname: Pesqueira
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001862:Bone Resorption / Q000150:complications; D002613:Cheilitis / Q000209:etiology; D003767:Dental Occlusion, Balanced; D019554:Dental Restoration Wear; D003779:Denture Design; D003824:Denture, Complete; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007571:Jaw Diseases / Q000150:complications / Q000534:rehabilitation; D007574:Jaw Relation Record; D008137:Longitudinal Studies; D008297:Male; D008310:Malocclusion / Q000209:etiology; D008334:Mandible / Q000502:physiology; D009066:Mouth, Edentulous / Q000150:complications / Q000534:rehabilitation; D016059:Range of Motion, Articular / Q000502:physiology; D013016:Sound; D013704:Temporomandibular Joint / Q000502:physiology*; D014093:Tooth, Artificial; D014159:Transducers; D014716:Vertical Dimension; D014732:Vibration