title: A dental implant-based registration method for measuring mandibular kinematics using cone beam computed tomography-based fluoroscopy.
abstract: OBJECTIVE
  This study aimed to develop and evaluate experimentally an implant-based registration method for measuring three-dimensional (3D) kinematics of the mandible and dental implants in the mandible based on dental cone beam computed tomography (CBCT), modified to include fluoroscopic function.
  
  
  METHODS
  The proposed implant-based registration method was based on the registration of CBCT data of implants/bones with single-plane fluoroscopy images. Seven registration conditions that included one to three implants were evaluated experimentally for their performance in a cadaveric porcine headmodel.
  
  
  RESULTS
  The implant-based registration method was shown to have measurement errors (SD) of less than -0.2 (0.3) mm, 1.1 (2.2) mm, and 0.7 degrees (1.3 degrees) for the in-plane translation, out-of-plane translation, and all angular components, respectively, regardless of the number of implants used. The corresponding errors were reduced to less than -0.1 (0.1) mm, -0.3 (1.7) mm, and 0.5 degree (0.4 degree) when three implants were used.
  
  
  CONCLUSIONS
  An implant-based registration method was developed to measure the 3D kinematics of the mandible/implants. With its high accuracy and reliability, the new method will be useful for measuring the 3D motion of the bones/implants for relevant applications.
authors.forename: Cheng-Chung
authors.initials: CC
authors.lastname: Lin
authors.forename: Chien-Chih
authors.initials: CC
authors.lastname: Chen
authors.forename: Yunn-Jy
authors.initials: YJ
authors.lastname: Chen
authors.forename: Tung-Wu
authors.initials: TW
authors.lastname: Lu
authors.forename: Shih-Wun
authors.initials: SW
authors.lastname: Hong
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002102:Cadaver; D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D019232:Dental Restoration Failure; D005471:Fluoroscopy; D021621:Imaging, Three-Dimensional / Q000379:methods*; D066298:In Vitro Techniques; D008334:Mandible / Q000000981:diagnostic imaging* / Q000502:physiology*; D015203:Reproducibility of Results; D013552:Swine
chemical_list: D015921:Dental Implants