The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
권호 표지
DOI QR코드

DOI QR Code

What determines dental protrusion or crowding while both malocclusions are caused by large tooth size?

치아전돌자와 치아밀집자의 측모두부방사선학적 비교

  • Sun, Min-Kyu (Department of Orthodontics, School of Dentistry, Chonnam National University) ;
  • Kim, Jae-Hyung (Department of Oral Medicine, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Cho, Jin-Hyoung (Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University) ;
  • Kim, Jeong-Moon (Korean Adult Occlusion Study Center) ;
  • Hwang, Hyeon-Shik (Department of Orthodontics, 2nd Stage of Brain Korea 21, School of Dentistry, Dental Science Research Institute, Chonnam National University)
  • Received : 2009.07.22
  • Accepted : 2009.09.10
  • Published : 2009.10.30
Download PDF
⟨ Previous Next ⟩

Abstract

Objective: To examine the differences in lateral cephalometric characteristics between patients with dental protrusion and crowding in order to determine what factors affect dental protrusion or crowding while both malocclusion types are caused by large tooth size. Methods: Twenty nine individuals with dental protrusion and 22 individuals with dental crowding were enrolled in this study. All subjects had larger teeth than average and Class I molar relationships. Craniofacial characteristics and hyoid bone positions were determined from lateral cephalograms and compared between the two groups. Results: In the comparisons of craniofacial characteristics, the measurements indicating maxillary length and facial convexity showed greater values in the protrusion group than in the crowding group. Comparisons of hyoid bone positions showed that the hyoid bone was positioned more anteriorly and superiorly in the protrusion group than in the crowding group. Conclusions: The results of the present study indicate that some craniofacial characteristics and tongue position may affect the development of dental protrusion or crowding; when an individual has large teeth, dental protrusion or crowding might be determined according to maxillary growth and tongue position.

치아크기가 전반적으로 클 때 어떤 환자에서는 전돌이 나타나는 반면, 어떤 환자에서는 치아밀집 현상이 나타난다. 본 연구는 치아전돌자와 치아밀집자 간의 측모두부방사선규격사진상의 특징을 비교함으로써 치아전돌 또는 치아밀집발생 원인을 규명하기 위하여 시행되었다. 치아크기가 정상에 비하여 크면서 제1급 구치관계를 가지는 치아전돌자 29명, 치아밀집자 22명을 선정한 후 중절치부터 제1대구치까지 치아크기를 비교하는 한편, 측모두부방사선규격사진에서 투사도를 작성하고 골격형태, 설골 및 절치 위치를 나타내는 여러 가지 계측치를 설정하고 치아전돌자와 치아밀집자 양 군 간의 비교분석을 시행하였다. 연구 결과 본 연구에서 선정된 치아전돌자와 치아밀집자의 치아크기는 양 군 간에 유의한 차이를 보이지 않았으며, 골격형태를 나타내는 계측항목 중 S-N, A'-Ptm', SNA, ANB, 그리고 facial convexity에서 치아전돌자가 통계적으로 유의한 큰 값을 보였다. 또한 설골의 수직위치를 나타내는 hy-PP와 hy-MP는 치아전돌자에서 통계적으로 더 작게, 설골의 전후방 위치를 나타내는 hy'-Go는 치아전돌자에서 통계적으로 더 크게 나타났다. 이상의 결과는 치아전돌자가 치아밀집자에 비해 골격적으로는 상악전돌 경향을 보이고 설골의 위치는 전방 또는 전상방에 위치하고 있어 이러한 차이가 치아전돌 또는 치아밀집 결정과 관련이 있음을 시사하였다.

Keywords

References

  1. Downs WB. Analysis of the dentofacial profile. Angle Orthod 1956;26:191-212
  2. Graber TM. Orthodontics: principles and practice. Philadelphia, PA: WB Saunders; 1972. p. 437-47
  3. Posen AL. The influence of maximum perioral and tongue force on the incisor teeth. Angle Orthod 1972;42:285-309
  4. Cox NH, van der Linden FP. Facial harmony. Am J Orthod 1971;60:175-83 https://doi.org/10.1016/0002-9416(71)90033-9
  5. Keating PJ. Bimaxillary protrusion in the Caucasian: a cephalometric study of the morphological features. Br J Orthod 1985;12:193-201 https://doi.org/10.1179/bjo.12.4.193
  6. McCann J, Burden DJ. An investigation of tooth size in Northern Irish people with bimaxillary dental protrusion. Eur J Orthod 1996;18:617-21 https://doi.org/10.1093/ejo/18.1.617
  7. Fastlicht J. Crowding of mandibular incisors. Am J Orthod 1970;58:156-63 https://doi.org/10.1016/0002-9416(70)90069-2
  8. Norderval K, Wisth PJ, Böe OE. Mandibular anterior crowding in relation to tooth size and craniofacial morphology. Scand J Dent Res 1975;83:267-73 https://doi.org/10.1111/j.1600-0722.1975.tb00436.x
  9. Doris JM, Bernard BW, Kuftinec MM, Stom D. A biometric study of tooth size and dental crowding. Am J Orthod 1981; 79:326-36 https://doi.org/10.1016/0002-9416(81)90080-4
  10. Hwang HS, Kim JT, Cho JH, Baik HS. Relationship of dental crowding to tooth size and arch width. Korean J Orthod 2004;34:488-96
  11. Fonseca RJ, Klein WD. A cephalometric evaluation of American Negro women. Am J Orthod 1978;73:152-60 https://doi.org/10.1016/0002-9416(78)90185-9
  12. Mitchell JI, Williamson EH. A comparison of maximum perioral muscle forces in North American blacks and whites. Angle Orthod 1978;48:126-31
  13. Posen AL. The application of quantitative perioral assessment to orthodontic case analysis and treatment planning. Angle Orthod 1976;46:118-43
  14. Lamberton CM, Reichart PA, Triratananimit P. Bimaxillary protrusion as a pathologic problem in the Thai. Am J Orthod 1980;77:320-9 https://doi.org/10.1016/0002-9416(80)90085-8
  15. Kim DS, Kim YJ, Choi JH, Han JH. A study of Korean norm about tooth size and ratio in Korean adults with normal occlusion. Korean J Orthod 2001;31:505-15
  16. Garn SM. Genetics of dental development. In: McNamara JA Jr, editor. The biology of occlusal development. Craniofacial Growth Series. Vol 7. Ann Arbor, Mich: Center for Human Growth and Development, The University of Michigan; 1977. p. 61-88
  17. Moyers RE. Analysis of the dentition and occlusion. In: Moyers RE, editor. Handbook of orthodontics. Chicago, Il: Year Book Medical Publishers; 1988. p. 221-46
  18. Rose JC, Roblee RD. Origins of dental crowding and malocclusions: an anthropological perspective. Compend Contin Educ Dent 2009;30:292-300
  19. Fromm B, Lundberg M. Postural behaviour of the hyoid bone in normal occlusion and before and after surgical correction of mandibular protrusion. Swed J Dent 1970;63:425-33
  20. Bibby RE, Preston CB. The hyoid triangle. Am J Orthod 1981; 80:92-7 https://doi.org/10.1016/0002-9416(81)90199-8
  21. Gustavsson U, Hansson G, Holmqvist A, Lundberg M. Hyoid bone position in relation to head posture. Swed J Dent 1972; 65:423-30
  22. King EW. A roentgenographic study of pharyngeal growth. Angle Orthod 1952;22:23-37
  23. Graber LW. Hyoid changes following orthopedic treatment of mandibular prognathism. Angle Orthod 1978;48:33-8
  24. Tallgren A, Solow B. Long-term changes in hyoid bone position and craniocervical posture in complete denture wearers. Acta Odontol Scand 1984;42:257-67 https://doi.org/10.3109/00016358408993879
  25. Carlsoo S, Leijon G. A radiographic study of the position of the hyo-laryngeal complex in relation to the skull and the cervical column in man. Trans R Sch Dent Stockh Umea 1960;5: 13-34

Cited by

  1. Correlation Analysis of the Hyoid Bone Position in Relation to the Cranial Base, Mandible and Cervical Part of Vertebra with Particular Reference to Bimaxillary Relations / Teleroentgenogram Analysis vol.20, pp.1, 2009, https://doi.org/10.5455/aim.2012.20.25-31
  2. The growth trends of Korean adolescents with bialveolar protrusion: a nine year longitudinal cephalometric study vol.36, pp.1, 2009, https://doi.org/10.1093/ejo/cjt012
  3. APPLICABILITY OF BOLTON’S ANALYSIS AND KESLING SET-UP- A STUDY ON CHHATTISGARH POPULATION vol.7, pp.13, 2009, https://doi.org/10.14260/jemds/2018/352