The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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The effect of premolar extractions on tooth-size discrepancy in malocclusion patients

Original Article 1 - 부정교합과 차등적 소구치 발치가 치아 크기 부조화에 미치는 영향

  • Kim, Hee-Hun (Department of Dentistry, Asan medical center, College of Medicine, University of Ulsan) ;
  • Sung, Sang-Jin (Department of Dentistry, Asan medical center, College of Medicine, University of Ulsan) ;
  • Moon, Yoon-Shik (Department of Dentistry, Asan medical center, College of Medicine, University of Ulsan)
  • 김희헌 (울산의대 서울아산병원 치과교정과) ;
  • 성상진 (울산의대 서울아산병원 치과교정과) ;
  • 문윤식 (울산의대 서울아산병원 치과교정과)
  • Published : 2010.03.01
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Abstract

To establish the ideal occlusal relationship, the values of tooth size and ratio must be in a normal range. In this study, the means and standard deviations of Bolton's anterior ratio and overall ratio using mesiodistal dimensions of teeth measured on diagnostic models of 334 Korean malocclusion patients were calculated and differences in Bolton ratio according to the groups of malocclusion patients were studied. Also the changes that can occur in overall ratio before and after hypothetical tooth extractions were observed. The results are as follows. 1. The mean anterior ratio of Korean malocclusion patients was $78.0\;{\pm}\;2.69%$, and the mean overall ratio was $91.56\;{\pm}\;2.28%$. 2. The largest value of tooth size ratio could be found in Class III group, followed by Class I and Class II groups in order. However there was no statically significant difference. 3. The values of overall ratio reduced significantly after premolar extractions in all malocclusion groups, which was much more significant in the extraction of upper second premolar and lower first premolar(U5L4) or upper second premolar and lower second premolar(U5L5). 4. The values of overall ratio reduced significantly after premolar extractions in all 3 groups divided based on Bolton ratio, which was much more significant in the extraction of upper second premolar and lower first premolar(U5L4) or upper second premolar and lower second premolar(U5L5).

Keywords

References

  1. Bolton WA. Disharmony in tooth size and its relation to the analysis and treatment of malocclusion. Angle Orthod 1958;28:113-30.
  2. Lavelle CLB. Maxillary and mandibular tooth size in different racial group and in different occlusal categories. Am J Orthod 1972;61:29-37. https://doi.org/10.1016/0002-9416(72)90173-X
  3. Smith SS, Buschang PH, Watanabe E. Interarch tooth size relationships of 3 populations："Does Bolton's analysis apply?". Am J Orthod Dentofacial Orthop 2000;117:169-74. https://doi.org/10.1016/S0889-5406(00)70228-9
  4. 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.
  5. Crosby DA, Alexander CG. The occurrence of tooth size discrepancies among different malocclusion groups. Am J Orthod Dentofacial Orthop 1989;95:457-61. https://doi.org/10.1016/0889-5406(89)90408-3
  6. Freeman JE, Maskeroni AJ, Lorton L. Frequency of Bolton tooth-size discrepancies among orthodontic patients. Am J Orthod Dentofacial Orthop 1996;110:24-7. https://doi.org/10.1016/S0889-5406(96)70083-5
  7. Fattahi HR, Pakshir HR, Hedayati Z. Comparison of tooth size discrepancies among different malocclusion groups. Eur J of Orthod 2006;28:491-5. https://doi.org/10.1093/ejo/cjl012
  8. Nie Q, Lin J. Comparison of intermaxillary tooth size discrepancies among different malocclusion groups. Am J Orthod Dentofacial Orthop 1999;116:539-44. https://doi.org/10.1016/S0889-5406(99)70186-1
  9. Kim HS, Shim HY, Nahm DS. A study on the anterior tooth size discrepancies among orthodontic patients with varying malocclusions. Korean J Orthod 2005;35:420-32.
  10. Lee YH, Jang YH. Anterior tooth size ratio and anterior overbite in an ethnic Korean population with normal occlusion. Seoul: Seoul National University 1998.
  11. Santoro M, Ayoub ME, Pardi VA, Cangialosi TJ. Mesiodistal crown dimensions and tooth size discrepancy of the permanent dentition of Dominican Americans. Angle Orthod 2000;70:303-7.
  12. Bolton WA. The clinical application of a tooth size analysis. Am J Orthod 1962;48:504-29. https://doi.org/10.1016/0002-9416(62)90129-X
  13. Saatçi P, Yukay F. The effect of premolar extractions on tooth-size discrepancy. Am J Orthod Dentofacial Orthop 1997;111:428-34. https://doi.org/10.1016/S0889-5406(97)80025-X
  14. Heusdens M, Dermaut L, Verbeeck R. The effect of tooth size discrepancy on occlusion: an experimental study. Am J Orthod Dentofacial Orthop 2000;117:184-91. https://doi.org/10.1016/S0889-5406(00)70230-7
  15. Kayalioglu M, Toroglu MS, Uzel I. Tooth-size ratio for patients requiring 4 first premolar extractions. Am J Orthod Dentofacial Orthop 2005;128:78-86. https://doi.org/10.1016/j.ajodo.2004.03.034
  16. Sim EJ, Hwang HS, Moon JD. A study on the error of tooth size measurements. Korean J Orthod 1999;29:491-501.
  17. Shellhart WC, Lange DW, Kluemper GT, Hicks EP, Kaplan AL. Reliability of the Bolton tooth-size analysis when applied to crowded dentitions. Angle Orthod 1995;65:327-34.
  18. Bishara SE, Jacobsen JR, Abdullah EM, Garcia AF. Comparisons of mesiodistal and buccolingual crown dimensions of the permanent teeth in 3 populations from Egypt, Mexico and the United states. Am J Orthod Dentofacial Orthop 1989;96:416-22 https://doi.org/10.1016/0889-5406(89)90326-0
  19. Araujo E, Souki M. Bolton anterior tooth size discrepancies among different malocclusion groups. Angle Orthod 2003;73:307-13.
  20. Alkofide E, Hashim H. Intermaxillary tooth-size discrepancy among different malocclusion classes: a comparative study. J Clin Pediatr Dent 2002;24:383-7.
  21. Richardson ER, Malhotra SK. Mesiodistal crown dimension of the permanent dentition of American Negroes. Am J Orthod 1975;68:157-64. https://doi.org/10.1016/0002-9416(75)90204-3
  22. Al-Tamimi T, Hashim HA. Bolton tooth-size ratio revisited. World J Orthod 2005;6:289-95.
  23. Lee SJ, Moon SC, Kim TW, Nahm DS, Chang YI. Tooth size and arch parameters of normal occlusion in a largeKorean sample. Korean J Orthod 2004;34:473-80.
  24. Tong H, Chen D, Xu L, Liu P. The effect of premolar extractions on tooth size discrepancies. Angle Orthod 2004;74:508-511.
  25. Kim EJ, Hwang HS. Reproducibility and accuracy of tooth size measurements obtained by the use of computer. Korean J Orthod 1999;29:563-73.
  26. Paredes V, Gandia JL, Cibrian R. Determination of Bolton tooth-size ratios by digitization, and