The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
권호 표지

Factors that influence treatment duration for patients with palatally impacted maxillary canines

구개측으로 매복된 상악견치의 교정치료기간에 영향을 미치는 요소

  • Jeong, Song-Hwa (Department of Oral & Maxillofacial Radiology, School of Dentistry, Busan National University) ;
  • Jo, Bong-Hye (Department of Oral & Maxillofacial Radiology, School of Dentistry, Busan National University) ;
  • Kim, Seong-Sik (Department of Orthodontics, School of Dentistry, Busan National University)
  • 정송화 (부산대학교 치과대학 구강악안면방사선학교실) ;
  • 조봉혜 (부산대학교 치과대학 구강악안면방사선학교실) ;
  • 김성식 (부산대학교 치과대학 치과교정학교실)
  • Published : 2007.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Objective: The aim of this study was to determine the relationship between the status of a unilateral palatally impacted maxillary canine (as seen on the panoramic radiograph) and the orthodontic treatment duration. Methods: A total of 36 subjects were chosen (8 males and 28 females, $13.7{\pm}2.5$ years). All patients had undergone orthodontic traction of the impacted canine after a closed flap surgery. The position of impacted canine on the panoramic radiograph was traced and calculated with regard to the treatment duration. Results: The canine overlap over the lateral incisor (COGr) had significant statistical difference between the short-term and the long-term treatment duration groups (divided by average treatment time of 21 months) (p<0.05). Multiple regression indicated that the variables of significance (with treatment duration as the dependent variable) were the canine vertical height from the occlusal plane $(HCV,\;r^2=0.115;\;p<0.05)$ and the mandibular anterior width $(MnDW,\;r^2=0.142;\;p<0.05)$. The treatment duration, the canine angle to the incisor midline (CA), and HCV decreased from primary dentition (under 12 yrs) to permanent dentition (15 yrs). Howerer, these increased again at the adolescent ages (over 16 yrs). Conclusion: These findings suggested that orthodontic treatment of a palatally impacted canine would show good prognosis at an age of early permanent dentition with the canine showing smaller CA and HCV.

구개측으로 매복된 견치와 인접구조물 간의 위치관계가 전체적인 교정치료기간에 어떤 영향을 미치는지 알아보고자 편측성 구개측 견치 매복으로 진단받고, 교정적인 견인을 하여 치료를 완료한 환자 36명의 초진 시 파노라마 방사선사진을 대상으로 연구하였다. 전체 치료기간의 평균인 21개월을 기준으로 나누었을 때, 장기치료군에 비해 단기치료군에서 인접 측절치의 치근에 견치의 치관이 겹치는 정도가 더 크게 나타났다. 치료기간을 예측하기 위한 중회귀분석에서 상악견치의 치관에서 치조정까지의 교합면에 대한 수직거리를 나타내는 HCV (Height of the canine crown vertically)와 하악견치간폭경이 각각 0.142와 0.115의 예측상수$(r^2)$를 보였으며, 두 인자를 같이 고려하였을 경우에는 0.208의 예측상수를 보였다. 나이에 따른 분류에서 치료기간, 상악 견치 치관에서 치조정까지의 수직거리(HCV), 중절치 정중선에 대한 견치의 각도가 초기 영구치열기까지는 점진적으로 감소를 하다가 완성 영구치열기에서 증가하였다. 본 연구의 결과, 구개측으로 매복된 견치의 견인을 시행할 때에는 초기 영구치열기에 견치의 치관첨이 교합면에 가깝고 직립이 되어 있을 경우에 전체 교정치료 기간이 짧아진다는 것을 알 수 있었다.

Keywords

References

  1. Dachi SF, Howell FV. A survey of 3,874 routine full-mouth radiographs. II. A study of impacted teeth. Oral Surg Oral Med Oral Pathol 1961;14:1165-9 https://doi.org/10.1016/0030-4220(61)90204-3
  2. Kramer RM, Williams AC. The incidence of impacted teeth. A survey at Harlem hospital. Oral Surg Oral Med Oral Pathol 1970;29: 237-41 https://doi.org/10.1016/0030-4220(70)90091-5
  3. Ericson S, Kurol J. Radiographic examination of ectopically erupting maxillary canines. Am J Orthod Dentofacial Orthop 1987;91:483-92 https://doi.org/10.1016/0889-5406(87)90005-9
  4. Grover PS, Lorton L. The incidence of unerupted permanent teeth and related clinical cases. Oral Surg Oral Med Oral Pathol 1985;59: 420-5 https://doi.org/10.1016/0030-4220(85)90070-2
  5. Foumier A, Turcotte JY, Bemard C. Orthodontic considerations in the treatment of maxillary impacted canines. Am J Orthod 1982;81: 236-9 https://doi.org/10.1016/0002-9416(82)90056-2
  6. Ericson S, Kurol J. Incisor resorption caused by maxillary cuspids. A radiographic study. Angle Orthod 1987;57:332-46
  7. Ericson S, Kurol J. Resorption of maxillary lateral incisors caused by ectopic eruption of the canines. A clinical and radiographic analysis of predisposing factors. Am J Orthod Dentofacial Orthop 1988;94:503-13 https://doi.org/10.1016/0889-5406(88)90008-X
  8. Boyd RL. Clinical assessment of injuries in orthodontic movement of impacted teeth. I. Methods of attachment. Am J Orthod 1982;82: 478-86 https://doi.org/10.1016/0002-9416(82)90316-5
  9. Boyd RL. Clinical assessment of injuries in orthodontic movement of impacted teeth. 11. Surgical recommendations. Am J Orthod 1984;86:407-18 https://doi.org/10.1016/S0002-9416(84)90034-4
  10. Suhr CH. Orthodontic considerationsmexillary impacted canines. J Korean Dent Assoc 1987;25:59-70
  11. Bishara SE. Impacted maxillary canines: a review. Am J Orthd Dentofacial Orthop 1992;101:159-71 https://doi.org/10.1016/0889-5406(92)70008-X
  12. Saiar M, Rebellato J, Sheats RD. Palatal displacement of canines and maxillary skeletal width. Am J Orthod Dentofacial Orthop 2006; 129:511-9 https://doi.org/10.1016/j.ajodo.2005.03.021
  13. Hunter SB. Treatment of the unerupted maxillary canine. Part 1--Preliminary considerations and surgical methods. Br Dent J 1983; 154:294-6 https://doi.org/10.1038/sj.bdj.4805071
  14. Hunter SB. Treatment of the unerupted maxillary canine. Part 2--Orthodontic methods. Br Dent J 1983; 154:324-6 https://doi.org/10.1038/sj.bdj.4805081
  15. Warford JH Jr, Grandhi RK, Tira DE. Prediction of maxillary canine impaction using sectors and angular measurement. Am J Orthod Dentofacial Orthop 2003;124:651-5 https://doi.org/10.1016/S0889-5406(03)00621-8
  16. Stewart JA, Heo G, Glover KE, Williamson PC, Lam EW, Major PW. Factors that relate to treatment duration for patients with palatally impacted maxillary canines. Am J Orthod Dentofacial Orthop 2001;119:216-25 https://doi.org/10.1067/mod.2001.110989
  17. Nordenram A, Stromberg C. Positional variations of the impacted upper canine. A clinical and radiologic study. Oral Surg Oral Med Oral Pathol 1966;22:711-4 https://doi.org/10.1016/0030-4220(66)90359-8
  18. Wolf JE, Mattila K. Localization of impacted maxillary canines by panoramic tomography. Dentomaxillofac Radiol 1979;8:85-91 https://doi.org/10.1259/dmfr.1979.0011
  19. Chaushu S, Chaushu G, Becker A. The use of panoramic radiographs to localize displaced maxillary canines. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1999;88:511-6 https://doi.org/10.1016/S1079-2104(99)70072-7
  20. Fox NA, Fletcher GA, Homer K. Localising maxillary canines using dental panoramic tomography. Br Dent J 1995;179:416-20 https://doi.org/10.1038/sj.bdj.4808945
  21. Jacoby H. The etiology of maxillary canine impactions. Am J Orthod 1983;84: 125-32 https://doi.org/10.1016/0002-9416(83)90176-8
  22. von der Heydt K. The surgical uncovering and orthodontic positioning of unerupted maxillary canines. Am J Orthod 1975;68:256-76 https://doi.org/10.1016/0002-9416(75)90235-3
  23. Al-Nimri K, Gharaibeh T. Space conditions and dental and occlusal features in patients with palatally impacted maxillary canines: an aetiological study. Eur J Orthod 2005;27:461-5 https://doi.org/10.1093/ejo/cji022
  24. Moyers RE. Development of occlusion. Dent Clin North Am 1969; 13:523-36
  25. Becker A, Smith P, Behar R. The incidence of anomalous maxillary lateral incisors in relation to palatally-displaced cuspids. Angle Orthod 1981;51:24-9
  26. Peck S, Peck L, Kataja M. The palatally displaced canine as a dental anomaly of genetic origin. Angle Orthod 1994;64:249-56
  27. Jacobs SG. The impacted maxillary canine. Further observations on aetiology, radiographic localization, preventionlinterception of impaction, and when to suspect impaction. Aust Dent J 1996;41:310-6 https://doi.org/10.1111/j.1834-7819.1996.tb03139.x
  28. Iramaneerat S, Cunningham SJ, Horrocks EN. The effect of two alternative methods of canine exposure upon subsequent duration of orthodontic treatment. Int J Paediatr Dent 1998;8:123-9 https://doi.org/10.1046/j.1365-263X.1998.00075.x
  29. Burden DJ, Mullally BH, Robinson SN. Palatally ectopic canines: closed eruption versus open eruption. Am J Orthod Dentofacial Orthop 1999; 115:640-4 https://doi.org/10.1016/S0889-5406(99)70289-1
  30. Pearson MH, Robinson SN, Reed R, Bimie DJ, Zaki GA. Management of palatally impacted canines: the findings of a collaborative study. Eur J Orthod 1997;19:511-5 https://doi.org/10.1093/ejo/19.5.511
  31. Becker A. Chaushu S. Success rate and duration of orthodontic treatment for adult patients with palatally impacted maxillary canines. Am J Orthod Dentofacial Orthop 2003;124:509-14 https://doi.org/10.1016/S0889-5406(03)00578-X
  32. Beckwith FR, Ackerman RJ Jr, Cobb CM, Tira DE. An evaluation of factors affecting duration of orthodontic treatment. Am J Orthod Dentofacial Orthop 1999;115:439-47 https://doi.org/10.1016/S0889-5406(99)70265-9
  33. Fink DF, Smith RJ. The duration of orthodontic treatment. Am J Orthod Dentofacial Orthop 1992; 102:45-5 https://doi.org/10.1016/0889-5406(92)70013-Z
  34. Armstrong C, Johnston C, Burden D, Stevenson M. Localizing ectopic maxillary canines-horizontal or vertical parallax? Eur J Orthod 2003;25:585-9 https://doi.org/10.1093/ejo/25.6.585
  35. Gavel V, Dermaut L. The effect of changes in tooth position of unerupted canines on cephalograms. Eur J Orthod 2003;25:49-56 https://doi.org/10.1093/ejo/25.1.49
  36. Mason C, Papadakou P, Roberts G. The radiographic localization of impacted maxillary canines: a comparison of methods. Eur J Orthod 2001 ;23:25-34 https://doi.org/10.1093/ejo/23.1.25
  37. Stivaros N, Mandall NA. Radiographic factors affecting the management of impacted upper permanent canines. J Orthod 2000; 27:169-73 https://doi.org/10.1093/ortho/27.2.169