A comparative study of guiding methods for natural head posture in cephalometrics

두부방사선규격사진 촬영 시 유도방법에 따른 자연두부자세의 차이 및 재현성에 관한 연구

  • Song, Jin-Myoung (Department of Orthodontics, School of Dentistry, Chonnam National University) ;
  • Lee, Ki-Heon (Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Hwang, Hyeon-Shik (Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University)
  • 송진명 (전남대학교 치과대학 교정학교실) ;
  • 이기헌 (전남대학교 치의학연구소, 치과대학 교정학교실) ;
  • 황현식 (전남대학교 치의학연구소, 치과대학 교정학교실)
  • Published : 2005.10.01

Abstract

The Purpose of this study was to compare the degree of vortical head rotation and to evaluate the reproducibility of natural Head posture (NHP) according to two guiding methods, the head posture aligner (HPA) method and the solf balance posture (SBP) method. The subjects consisted of 30 adults. On the first day. lateral and frontal cephalometric radiographs were obtained through the two guiding methods. One mouth later. lateral and frontal cephalometric radiographs were obtained again through both guiding methods. The degrees of vertical head rotation of both guiding methods were compared and the reproducibility was evaluated for each guiding method. A comparison of the degrees of vortical head rotation for the two methods revealed that the vertical head posture was lower in the SBP method than in the HPA method by an average of $2.79^{\circ}$. All measurements obtained using the HPA and SBP methods with a time interval of one north did not show any significant difierence in lateral and frortal cephalometric radiographs. The results of the present study suggest that the SBP method may be used as an alternative to the HPA method in case the HPA method can not be applied.

두부방사선규격사진에서는 매 촬영 시마다 두부의 수직적 회전 정도를 일정하게 유지하기 위하여 두부자세의 재현이 필요하다 본 연구는 유도방법에 따른 자연두부자세의 수직적 두부회전 정도의 차이를 비교하고 각 두부자세의 재현성을 평가하기 위하여 시행되었다 20대 성인 남녀 30명을 연구대상으로 하여 head posture aligner를 이용한 방법(HPA법)과 self balance posture를 이용한 방법(SBP법)으로 자연두부자세를 유도하여 측모 및 정모두부방사선규격사진을 각각 한 달 간격으로 촬영한 후, 측모두부방사선규격사진 상에서 유도 방법에 따른 수직적 두부회전 정도의 차이를 비교하는 한편, 측모 및 정모두부방사선규격사진에서 시간 간격을 두고 동일 방법으로 유도하여 촬영한 두 사진 상의 동일 계측항목 간 차이를 비교함으로써 각 두부자세의 유도방법에 대한 재현성을 평가하였다 연구결과 SBP법으로 유도한 자연두부자세는 HPA법에 의해 유도된 자연두부자세보다 평균 $2.79^{\circ}$ 고개를 숙인 자세로 나타났다. 또한 HPA법 또는 SBP법을 이용하여 시간 간격을 두고 각각 2회 촬영한 측모두부방사선규격사진과 정모두부방사선규격사진 상의 계측치는 모든 계측항목에서 통계적으로 유의한 차이를 보이지 않는 것으로 나타났다. 본 연구 결과는 HPA법과 SBP법으로 유도한 자연두부자세가 모두 재현성이 있음을 나타내는 것으로 두부방사선규격사진 촬영 시 재현성을 높이기 위하여 HPA법과 더불어 SBP법도 임상적으로 사용될 수 있음을 시사하였다.

Keywords

References

  1. Broadbent BII. A new X -ray technique and its application of orthodontics. Angle Orthod 1931;1:4.5-66
  2. Proffit WR. The search for truth: Diagnosis in surgical-orthodontic treatment St Louis: Mosby Year Book: 1996. p. 96-141
  3. 고은희, 이기헌, 황현식. 정모두부방사선사진 촬영시 두부의 수직회전에 따른 투사오차. 대치교정지 2003;33:73-84
  4. Cooke MS, Wei SH. An improved method for the assessment of the sagittal skeletal pattern and its correlation to previous methods. Eur J Orthod 1988;10;122-7 https://doi.org/10.1093/ejo/10.1.122
  5. Solow B, Tallgren A. Natural head position in standing subjects. Acta Odontol Scand 1971;29:591-607 https://doi.org/10.3109/00016357109026337
  6. Solow B, Tallgren A. Dentoalveolar morphology in relation to craniocervical posturc. Angle Orthod 1977:47:157-64
  7. Solow B, Tangren A. Head pcsture and craniofacial morphology. Am J Phys Anthropol 1976:44:417-35 https://doi.org/10.1002/ajpa.1330440306
  8. Solow B, Siersbaek-Nielsen S. Growth changes in head posture related to craniofacial development. Am J Orthod 1986;89:132-40 https://doi.org/10.1016/0002-9416(86)90089-8
  9. Cooke MS. Five-year reproducibility of natural head posture: A longitudinal study. Am J Orthod Dentofacial Orthop 1990;97:489-94 https://doi.org/10.1016/S0889-5406(05)80029-0
  10. Cooke MS, Wei SH. The reproducibility of natural head posture; A methodological study. Am J Orthod Dentofacial Orthop 1988;93:280-8 https://doi.org/10.1016/0889-5406(88)90157-6
  11. Peng L, Cooke MS. Fifteen-year reproducibility of natural head posture: A longitudinal study. Am J Orthod Dentofacial Orthop 1999;116:1;82-5 https://doi.org/10.1016/S0889-5406(99)70306-9
  12. 김은희, 황현식. 정모두부방사선사진 촬영시 Head Posture Aligner의 유용성에 관한 연구. 대치교정지 2000;30:543-52
  13. Moorrees CF, Kean MR. Natural head position, a basic consideration in the interpretation of cephalometric radiographs. Am J Phys Anthrop 1958:16:213-34 https://doi.org/10.1002/ajpa.1330160206
  14. Downs WB. Analysis of the dentofacial profile. Angle Orthod 1956:4:191-212
  15. Bjerin R. A comparison between the Frankfort Horizontal and the sella turcica-nasion as reference planes in cephalometric analysis. Acta Odontol Scand 1957;15:1-12 https://doi.org/10.3109/00016355709041090
  16. Kantor ML., Norton LA. Normal radiographic anatomy and common anomalies seen in cephalometric films. Am J Orthod Dentofacial Orthop 1987:91:414-26 https://doi.org/10.1016/0889-5406(87)90394-5
  17. Steiner CC. The use of cephalometries as an aid to planning and assessing orthodontic treatment. Am J Orthod 1960:46:721-35 https://doi.org/10.1016/0002-9416(60)90145-7
  18. Ricketts RW, Roth RH, Chaconas SJ. Orthodontic diagnosis and planning. Vol 1. Rocky Mountain Data System 1985
  19. Shah SM, Joshi MR. An assessment of asymmetry in the normal craniofacial complex. Angle Orthod 1978:48:141-8
  20. Mulick JF. Clinical use of the frontal headfilm. Angle Orthod 1965;35:299-304
  21. Grurnrnons DC, Kappeyne van de Cappello MA. A frontal asymmetry analysis. J Clin Orthod 1987:21:448-6
  22. Showfety KJ, Vig PS, Matteson S. A simple method for taking natural - head-position cephalograrns. Am J Orthod 1983:83:495-500
  23. Grayson B, Cutting C, Bookstcin FL, Kim H, McCarthy JG. The three -dimensional ccphalozrarn Theory, technique, and clinical application. Am J Orthod Dentofacial Orthop 1988;94:327-37 https://doi.org/10.1016/0889-5406(88)90058-3
  24. Brown T, Abbott AH. Computer assisted location of reference points in three dimension for radiographic cephalometry. Am J Orthod Dentofacial Orthop 1989:95:490-8 https://doi.org/10.1016/0889-5406(89)90412-5
  25. Sandham A. Repeatability of head posture recordings from lateral cephalometric radiographs. Br J Orthod 1988;15:157-62 https://doi.org/10.1179/bjo.15.3.157