The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
권호 표지

3D Analysis of Facial Asymmetry using CBCT

CBCT를 이용한 3차원 안면비대칭분석

  • Yoon, Suk-Ja (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Wang, Rui-Feng (Department of Biologic and Material Sciences, School of Dentistry, University of Michigan) ;
  • Palomo, J. Martin (Department of Orthodontics at Case Western Reserve University)
  • 윤숙자 (전남대학교 치의학전문대학원 구강악안면방사선학교실) ;
  • ;
  • Received : 2010.10.13
  • Accepted : 2010.10.19
  • Published : 2010.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Accurate analysis of facial asymmetry prior to any orthognathic or orthodontic treatment plan is essential in ensuring good treatment result. Dental CBCT (Cone-beam Computed Tomography) provides as actual three-dimensional measurements of distance and angle without any radiographic magnification as medical CT provides, while its field of view is limited to the oral and maxillofacial area. CBCT is a useful tool for the diagnosis of facial asymmetry. The coordinates of facial landmarks are obtained from the 3D reconstruction software which enables the establishment of perpendicular planes and the identification of the landmarks. Then, the bilateral discrepancies of the landmarks are obtained as spherical polar coordinates which can show the amount of asymmetry and its direction. A method of 3D analysis of facial asymmetry using CBCT is introduced in this report.

Keywords

References

  1. Lee DH, Lee JS, Yoon SJ, Kang BC. Three dimensional evaluation of impacted mesiodens using dental cone beam CT. Korean J Oral Maxillofac Radiol 2010;40:109-14.
  2. Katsumata A, Fujishita M, Maeda M, Ariji Y, Ariji E, Langlais RP. 3D-CT evaluation of facial asymmetry. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2005;99:212-20. https://doi.org/10.1016/j.tripleo.2004.06.072
  3. Hwang HS, Hwang CH, Lee KH, Kang BC. Maxillofacial 3-dimensional image analysis for the diagnosis of facial asymmetry. Am J Orthod Dentofacial Orthop 2006;130:779-85. https://doi.org/10.1016/j.ajodo.2005.02.021
  4. Park SH, Yu HS, Kim KD, Lee KJ, Baik HS. A proposal for a new analysis of craniofacial morphology by 3-dimensional computed tomography. Am J Orthod Dentofacial Orthop 2006;129:600.e23-34. https://doi.org/10.1016/j.ajodo.2005.11.032
  5. Baek SH, Cho IS, Chang YI, Kim MJ. Skeletodental factors affecting chin point deviation in female patients with Class III malocclusion and facial asymmetry: a three-dimensional analysis using computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2007;104:628-39. https://doi.org/10.1016/j.tripleo.2007.03.002
  6. Yoon SJ, Lim HJ, Kang BC, Hwang HS. Three dimensional CT analysis of facial asymmetry. Korean J Oral Maxillofac Radiol 2007;37:45-51.
  7. Kim DS, Han WJ, Kim EK. Comparison of CT numbers between cone-beam CT and multi-detector CT. Korean J Oral Maxillofac Radiol 2010;40:63-8.
  8. Kim SY, Han JW, Park IW. Comparison of cone beam CT and conventional CT in absorbed and effective dose. Korean J Oral Maxillofac Radiol 2008;38:7-15
  9. Ludlow JB. Dose and risk in dental diagnostic imaging: with emphasis on dosimetry of CBCT. Korean J Oral Maxillofac Radiol 2009;39:175-84.
  10. Farman AG, Scarfe WC. Development of imaging selection criteria and procedures should precede cephalometric assessment with cone-beam computed tomography. Am J Orthod Dentofacial Orthop 2006;130:257-65. https://doi.org/10.1016/j.ajodo.2005.10.021