title: [Comparative study on bilateral temporomandibular joint of patients with unilateral multiple symptoms in cone-beam computed tomography].
abstract: OBJECTIVE
  To investigate bilateral temporomandibular joint of patients with unilateral multiple symptoms in cone-beam computed tomography (CBCT) and explore the reference planes that may be different,providing reference for the diagnosis of temporomandibular disorders and comparative study.
  
  
  METHODS
  50 cases with unilateral multiple symptoms（except for cases with unilateral single symptom）were examined by CBCT and the following indexes were observed and analyzed,including horizontal angles of the cross-sectional condyle after the reconstruction in the same patient, joint space, macroaxis diameter of condyle and vertical angles of condyle, which were commonly used at oblique position parallelled to the long axis of condyle, the gradient of articular tubercle and the joint space,which could be obtained at sagittal and oblique position vertical to the long axis of condyle.The data obtained was analyzed by paired t test with SPSS13.0 software package.
  
  
  RESULTS
  There was significant difference between the bilateral measured value of joint space when the angle was 60° in sagittal plane (P<0.05).The difference was more significant when the angle was 120° in parallel plane and 90° in sagittal plane (P<0.01). The other measured parameters were not significant different.
  
  
  CONCLUSIONS
  For patients with TMD, it is more easily to observe differences between the bilateral measured value of joint space in the sagittal or vertical plane,where the increase of the front joint space can be seen and construction was more significant.
authors.affiliation: Department of Stomatology, First Affiliated Hospital of PLA General Hospital, Oral Medical Center of PLA General Hospital. Beijing 100048, China. E-mail:hanyishi@yeah.net.
authors.forename: Yi-shi
authors.initials: YS
authors.lastname: Han
authors.affiliation: Department of Stomatology, First Affiliated Hospital of PLA General Hospital, Oral Medical Center of PLA General Hospital. Beijing 100048, China.
authors.forename: Yan-feng
authors.initials: YF
authors.lastname: Li
authors.affiliation: Department of Stomatology, First Affiliated Hospital of PLA General Hospital, Oral Medical Center of PLA General Hospital. Beijing 100048, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lv
authors.affiliation: Department of Stomatology, General Hospital of Ningxia Medical University. Yinchuan 750004, Ningxia Hui Autonomous Region, China.
authors.forename: Xiao-qian
authors.initials: XQ
authors.lastname: Guo
authors.affiliation: Department of Stomatology, PLA General Hospital. Beijing 100048, China.
authors.forename: Zhao-wu
authors.initials: ZW
authors.lastname: Wang
authors.affiliation: Fengtai District Community Health Service Center. Beijing 100071,China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Department of Stomatology, PLA General Hospital. Beijing 100048, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Stomatology, PLA General Hospital. Beijing 100048, China.
authors.forename: Wei-li
authors.initials: WL
authors.lastname: Han
authors.forename: Min
authors.initials: M
authors.lastname: Hu
authors.forename: Hong-chen
authors.initials: HC
authors.lastname: Liu
mesh_terms: D054893:Cone-Beam Computed Tomography; D003430:Cross-Sectional Studies; D006801:Humans; D008335:Mandibular Condyle; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging*; D013705:Temporomandibular Joint Disorders / Q000000981:diagnostic imaging*