The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A photoelastic evaluation of stress distribution during distal movement of upper molar

헤드기어를 이용한 상악 제1대구치의 후방이동 시 응력분포에 관한 광탄성법적 연구

  • Song, Sae-Eun (Department of Orthodontics, College of Dentistry, Chosun University) ;
  • Lim, Sung-Hoon (Department of Orthodontics, College of Dentistry, Chosun University) ;
  • Yoon, Young-Joon (Department of Orthodontics, College of Dentistry, Chosun University) ;
  • Kim, Kwang-Won (Department of Orthodontics, College of Dentistry, Chosun University)
  • 송세은 (조선대학교 치과대학 교정학교실) ;
  • 임성훈 (조선대학교 치과대학 교정학교실) ;
  • 윤영주 (조선대학교 치과대학 교정학교실) ;
  • 김광원 (조선대학교 치과대학 교정학교실)
  • Published : 2004.04.01
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Abstract

The purpose of this study was to photoelastically visualize 4he distribution of fortes transmitted to the alveolus and surrounding structures using three different types of headgear for the distal movement of the upper molars. A photoelastic maxillary model was made and three different directional forces applied, which were high-pull, straight-pull, and cervical-pull. Stress distribution was recorded through circular polariscope, and two-dimensional photoelastic stress analysis was performed according to isochromatic fringe characteristics. The results were as follows: 1. In the case of high-pull headgear bodily movement occurred in the medium- length outer bow, stress distribution in the apical region was 1st molar, 2nd premolar, lst premolar in sequence and there was no apparent difference. 2. In the case of straight-pull headgear, bodily movement occurred in the long outer bow and stress distribution in the apical region was heavy in the 1st molar, 2nd premolar, 1st premolar in sequence. But. there were no apparent differences according to the length of the outer bow. 3. In the case of cervical- pull headgear, bodily movement also occulted in 4he long outer bow, and apical stress of the premolar region was heaviest among other cases and apical stress of the 2nd premolar was heaviest in the short outer bow. In clinical situations, to achieve bodily movement of the upper 1st molars without modifying outer bow height, applying an outer bow length as long as the inner bow length in high-pull headgear and applying an outer bow length longer than the inner bow length in straight-pull, cervical-pull headgear are recommended.

이 연구의 목적은 세 가지 형태의 헤드기어를 이용하여 상악 제1대구치의 후방이동 시 치아 주위 조직에 나타나는 응력분포를 광탄성법을 이용하여 관찰하는 것이다. 광탄성 상악모형에 장착한 헤드기어에 high-pull, straight-pull, cervical-pull의 세 가지 방향에서, face bow의 inner bow와 outer bow를 평행하게 한 상태에서 outer bow의 길이를 세 가지로 다르게 하여 적용시킨 다음 원편광기를 이용하여 응력분포를 분석하였다. 사진기를 이용하여 응력분포를 기록하고, 등색선상의 무늬차수를 이용, 응력분포를 분석하여 이차원적인 광탄성 응력분석을 시행하였다. 그 결과는 다음과 같다. 1. high-pull 헤드기어의 경우, 중간 길이의 outer bow일 때 치체이동에 유리한 응력 분포가 나타났다 2. straight-pull 헤드기어의 경우, 긴 길이의 outer bow일 때 좀더 치체이동에 유리한 응력 분포가 나타났으나, outer bow의 길이에 따른 응력분포의 변화는 적었다. 3. cervical-pull 헤드기어의 경우, 긴 길이의 outer bow일 때 치체이동에 유리한 응력 분포가 나타났다. 임상에서 헤드기어를 이용하여 상악 제1대구치를 후방으로 치체이동시키기 위해서는 facebow outer bow의 높이를 조정하지 않는 경우에는 high-pull 헤드기어에서는 outer bow와 inner bow를 같은 길이로, straight-pull 및 cervical-pull 헤드기어에서는 outer bow를 더 길게 하여 사용하는 것이 추천된다.

Keywords

References

  1. Kurol J, Bjerklin K. Treatment of children with ectopic eruption of maxillary first permanent molar by cervical traction. Am J orthol 1984 : 86 : 483-92
  2. Zak B. Photoelastic analysis in der orthodontischen mechanik. Oesterr Z Stomatol 1935 : 33 : 22-37
  3. Claconas SJ, Effects of wire size, loopconfiguration, and gabling on canme-retraction spring. Am J Orthod 1974 : 65 : 58-71
  4. Caputo AA Chaconas SJ. Hayashi RK. Photoelastic visualization of orthodontic forces during canine retraction. Am J Orthod 1974 : 65 : 250-9
  5. Baeten LR. Canine retraction: A photoelastic study. Am J Orthod 1975 : 67 : 11-23
  6. Brodsky JF, Caputo AA, Farstman LI. Root tipping :A photoelastic Histopathologic correlation. Am J Orthod 1975 : 67 : 1-10
  7. Ayala, Ayala Perez C, de Alha JA, Caputo AA, Chaconas SJ. Canine retraction with J hook headgear. Am J Orthod 1980 : 538-47
  8. Itoh T, Chaconas SJ, Caputo AA, Matya SJ. Photoelastic effects of maxillary protraction on the craniofacial complex. Am J Orthod 1985 : 117-24
  9. 검광호. 각종의 headgear를 이용한 정형력이 두개안변골에 마치는 영향에 관한 광탄성학적 연구 대치교정지 1986 : 16 : 71-81
  10. 이인수. Headgear가 상악골에 미치는 영향에 관한 유한요소법적 분석. 대치교정지 1985 : 15 : 211-27
  11. 박기호, 손병화. Laser 반사측정법을 이용한 상악 전치부 함입시 저항중심의 수평적 위치에 관한 연구 대치교정지 1995 : 23 : 619-31
  12. Wheeler RC. Dental anatomy, physiology and occlusion, 6th ed. Phila-delphia 1984
  13. Gjessing P. Controlled retraction of maxillary incisors. Am J orthod Dentofac orthop 1992 : 101 : 120-31
  14. Murphy NC, De Alba JA. Chaconas SJ, Caputo AA. Experimental force anlysis ofthe contraction utility arch wire. AmJ Orthod 1982 82 : 411-7
  15. Pederson E, Anderson K, Melson B. Tooth displacement analyses on human auptopsy material by means of strain gauge technique. Eur J orthod 1991 : 13 65-74 https://doi.org/10.1093/ejo/13.1.65
  16. Burstone CJ, Pryputniewicz RJ, Holographic determinination of center of rotation r$\pi$oduced by orthodontic forces. Am J Orthod 1980 : 77 : 396-409
  17. 천옥진, 손병화, 서정훈 상악 4절치의 후방견인시 나타나는 현상에 관한 유한요소법적 분석 대치교정지 1995 : 25 : 525-41
  18. Tanne K, Hiraga J，Kakiuchi K, Yamagata, SakudaM. biomechanical effect of anteriordirected extraoral forceson the craniofacial complex a study using the finite element method. Am J orthod Dentofac orthop 1989 : 95: 200-7
  19. 이승호, 김정기. MEAW의 응력분포에 관한 광탄성학적 연구 대치교정지 1994 : 24 : 969-82
  20. Evans FG.Stress and strain in bones. In : Charles C Thomas. Spring-field lllinois publisher, 1957
  21. 이유진, 박수병. 상악전치의 후방견인시 J-hook headgear의 사용이 응력분포변화에 미치는 영향에 관한 광탄성학적 연구, 대치교정지 1997 : 27 : 697-709
  22. Bowley WW, Burstone CJ, Koenig HA, Siatkowski Re. Prediction of tooth displacement using laser holography and finite element techni-que. In HeronRE, eds. Biostereometrics 74, 1974 : 241-73
  23. Pedersen E, Andersen K, Melsen B. Tooth displacement analyzed on human autopsy material by means of a strain gage technique. Eur J Othod 1991 : 13 : 65-74
  24. 교정학교수협의회, 치과교정학, 서울 지성출판사, 1999 : 364-382
  25. Matsui S, Caputo AA, Chaonas SJ, Kyomura H. Shigeyuki M, Caputo AA. Center of resistance of anterior arch segment. Am J Orthod Dentofac Orthop 2000 : 118 : 171-8
  26. Smith RJ, BurstoneCJ. Mechanics of tooth movement. Am J Orthod 1984 : 85 : 294-307
  27. Fish GD. Some engineering principles of possible interest to ortho-dontist. Dental Comas 1917 : 59 : 881-9
  28. Burstone CJ, The Mechanies of tooth movement. In : Kraus BS, Riedel RA, Lea, Febiger. eds. Vitas in Orthodontics. 1962 : 197-213
  29. Dijkman JFP. Krachten verdelingen bij orthdontische behandeling. Doctoral thesis Nijmegen 1969
  30. Oosthuizen L, Digkman JF, Evans WG. A mechniacal appraisal of the kloehnextraoral Assembly. Angle Orthod 1973 : 43 : 221-232
  31. Chaconas SJ, Caputo AA, Bavis JC. The effect of orthopedic forces on cranifacial complex utilizing cervical and headgear appliance. Am J Orhhod 1976 : 69 : 527-39
  32. Amstrong MM. Controlling the maginitude, direction and Duration of extraoral force. Am J Orthod 1971 : 59 : 217-43
  33. Newcombe MR. Some observation of extraoral treatuJent. Angle Orthod 1958 : 28 : 131-48
  34. Proffit WR. Contemporary orthodontics. St. Louis : CV Mosby, 2000 : 491-2
  35. Wiedlander L. The effect of orthodintic treatment on the concurrent development of the craniofacial complex. AM J Orthod 1963 : 49 : 15-27
  36. Thomas M Graber, Robert L Vanarsdall Jr. eds. Orthodontics, Current principles and techniques. St. Louis : CV Mosby 3rd edition : 455
  37. Proffit WR. Contemporary othhodontics. St Louis : CV Mosby, 3rd edition : 445