title: Movement of the mandibular condyle and articular disc on placement of an occlusal splint.
abstract: OBJECTIVE
  The aim of this study was to evaluate, with the use of magnetic resonance images, mandibular condyle and articular disc movement on occlusal splint application.
  
  
  METHODS
  Thirty-five subjects were classified into "Pain" and "No-pain" groups based on visual analog scale scoring of temporomandibular joint (TMJ) pain and were categorized as bilateral normal disc (ND), unilateral anterior disc displacement (ADD), or bilateral ADD position. t test and analysis of variance with multiple comparisons were used for statistical analyses.
  
  
  RESULTS
  Pain and No-pain groups showed significant anteroinferior and rotated movement of the condyle on splint application, but the disc did not significantly move in the Pain group. Of all groups, anteroposterior movement of the condyle and disc with the splint was significantly less in the unilateral ADD group.
  
  
  CONCLUSIONS
  TMJ pain was associated with decreased movement of the articular disc. Disc and condyle movement was different in the unilateral ADD group in the presence of a splint compared with the ND and bilateral ADD groups.
authors.affiliation: Division of Oromaxillofacial Regeneration, Osaka University Graduate School of Dentistry, Osaka, Japan. cem17150@hyo-med.ac.jp
authors.forename: Yoko
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Naoya
authors.initials: N
authors.lastname: Kakimoto
authors.forename: Seiki
authors.initials: S
authors.lastname: Tomita
authors.forename: Kosuke
authors.initials: K
authors.lastname: Honda
authors.forename: Yuto
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Yagi
authors.forename: Jyugo
authors.initials: J
authors.lastname: Kondo
authors.forename: Tadashi
authors.initials: T
authors.lastname: Nagashima
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ono
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maeda
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D016302:Centric Relation; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008335:Mandibular Condyle / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D017090:Occlusal Splints; D010043:Outcome and Process Assessment, Health Care; D010147:Pain Measurement; D011859:Radiography; D016059:Range of Motion, Articular; D012016:Reference Values; D019224:Temporomandibular Joint Disc / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000473:pathology; D013705:Temporomandibular Joint Disorders / Q000473:pathology* / Q000628:therapy; D055815:Young Adult