DOI QR코드

DOI QR Code

Effects of bracket slot size during en-masse retraction of the six maxillary anterior teeth using an induction-heating typodont simulation system

  • Kim, Ji-Yong (Department of Orthodontics, School of Dentistry, Kyungpook National University) ;
  • Yu, Won-Jae (Department of Orthodontics, School of Dentistry, Kyungpook National University) ;
  • Koteswaracc, Prasad N.K. (Department of Orthodontics, Faculty of Dental Science, Sri Ramachandra University) ;
  • Kyung, Hee-Moon (Department of Orthodontics, School of Dentistry, Kyungpook National University)
  • Received : 2014.10.15
  • Accepted : 2015.03.26
  • Published : 2017.05.25

Abstract

Objective: To investigate how bracket slot size affects the direction of maxillary anterior tooth movement when en-masse retraction is performed in sliding mechanics using an induction-heating typodont simulation system. Methods: An induction-heating typodont simulation system was designed based on the Calorific Machine system. The typodont included metal anterior and resin posterior teeth embedded in a sticky wax arch. Three bracket slot groups (0.018, 0.020, and 0.022 inch [in]) were tested. A retraction force of 250 g was applied in the posterior-superior direction. Results: In the anteroposterior direction, the cusp tip of the canine in the 0.020-in slot group moved more distally than in the 0.018-in slot group. In the vertical direction, all six anterior teeth were intruded in the 0.018-in slot group and extruded in the 0.020- and 0.022-in slot groups. The lateral incisor was significantly extruded in the 0.020- and 0.022-in slot groups. Significant differences in the crown linguoversion were found between the 0.018- and 0.020-in slot groups and 0.018- and 0.022-in slot groups for the central incisor and between the 0.018- and 0.022-in slot groups and 0.020- and 0.022-in slot groups for the canine. In the 0.018-in slot group, all anterior teeth showed crown mesial angulation. Significant differences were found between the 0.018- and 0.022-in slot groups for the lateral incisor and between the 0.018- and 0.020-in slot groups and 0.018- and 0.022-in slot groups for the canine. Conclusions: Use of 0.018-in slot brackets was effective for preventing extrusion and crown linguoversion of anterior teeth in sliding mechanics.

References

  1. Park HS, Bae SM, Kyung HM, Sung JH. Micro-implant anchorage for treatment of skeletal Class I bialveolar protrusion. J Clin Orthod 2001;35:417-22.
  2. Jee JH, Ahn HW, Seo KW, Kim SH, Kook YA, Chung KR, et al. En-masse retraction with a preformed nickel-titanium and stainless steel archwire assembly and temporary skeletal anchorage devices without posterior bonding. Korean J Orthod 2014;44:236-45. https://doi.org/10.4041/kjod.2014.44.5.236
  3. Lee J, Miyazawa K, Tabuchi M, Sato T, Kawaguchi M, Goto S. Effectiveness of en-masse retraction using midpalatal miniscrews and a modified transpalatal arch: Treatment duration and dentoskeletal changes. Korean J Orthod 2014;44:88-95. https://doi.org/10.4041/kjod.2014.44.2.88
  4. Park HS, Kwon TG. Sliding mechanics with microscrew implant anchorage. Angle Orthod 2004;74: 703-10.
  5. Kim YC. Finite element analysis of the effect of wire thickness on tooth movement in sliding mechanics. MSD thesis. Daegu, Korea: Kyungpook National University;2003.
  6. Ji MJ. The effect of amount of torquing curve and thickness of archwire on the angulation of the teeth in six anterior teeth retraction. PhD thesis. Daegu, Korea: Kyungpook National University; 2005.
  7. Song HS. Three-dimensional finite element analysis of tooth axis of maxillary anterior teeth during retraction with microimplant. MSD thesis. Daegu, Korea: Kyungpook National University; 2006.
  8. Seo KW, Kwon SY, Kim KA, Park KH, Kim SH, Ahn HW, et al. Displacement pattern of the anterior segment using antero-posterior lingual retractor combined with a palatal plate. Korean J Orthod 2015;45:289-98. https://doi.org/10.4041/kjod.2015.45.6.289
  9. Lee HC, Chun YS. A photoelastic study on the initial stress distribution of 3 types TMA multi-vertical loop arch wire. Korean J Orthod 1995;25:73-85.
  10. Chaconas SJ, Caupto AA, Miyashita K. Force distribution comparisons of various retraction archwires. Angle Orthod 1989;59:25-30.
  11. Caputo AA, Chaconas SJ, Hayashi RK. Photoelastic visualization of orthodontic forces during canine retraction. Am J Orthod 1974;65:250-9. https://doi.org/10.1016/S0002-9416(74)90330-3
  12. Chen J, Isikbay SC, Brizendine EJ. Quantification of three-dimensional orthodontic force systems of T-loop archwires. Angle Orthod 2010;80:566-70.
  13. Kumar YM, Ravindran NS, Balasubramaniam MR. Holographic analysis of the initial canine displacement produced by four different retraction springs. Angle Orthod 2009;79:368-72. https://doi.org/10.2319/121407-587.1
  14. Moss ML, Skalak R, Patel H, Sen K, Moss-Salentijn L, Shinozuka M, et al. Finite element method modeling of craniofacial growth. Am J Orthod 1985;87:453-72. https://doi.org/10.1016/0002-9416(85)90084-3
  15. Chun YS, Row J, Jung SH, Kim HJ. A study on the effect of the magnitude of the gable bends on the tooth movement pattern during en-masse space closure in the maxillary dentition. Korean J Orthod 2004;34:33-45.
  16. Jeon HJ, Park SH, Jung SH, Chun YS. Three dimensional analysis of tooth movement using different sizes of NiTi wire on NiTi scissors-bite corrector. Korean J Orthod 2009;39:43-53. https://doi.org/10.4041/kjod.2009.39.1.43
  17. Rhee JN, Chun YS, Row J. A comparison between friction and frictionless mechanics with a new typodont simulation system. Am J Orthod Dentofacial Orthop 2001;119:292-9. https://doi.org/10.1067/mod.2001.112452
  18. Kim SJ, Chun YS, Jung SH, Park SH. Three dimensional analysis of tooth movement using different types of maxillary molar distalization appliances. Korean J Orthod 2008;38:376-87. https://doi.org/10.4041/kjod.2008.38.6.376
  19. Kyung HM, Kim JY, Kyung IK. Heat Induction Typodont $System^{(R)}$ (HITS) for simulating orthodontic tooth movement. Clin J Korean Assoc Orthod 2013; 3:177-8.
  20. Park HS. Orthodontic treatment using microimplant. Seoul: Daehan Nare Publishing; 2006.
  21. Sia S, Shibazaki T, Koga Y, Yoshida N. Experimental determination of optimal force system required for control of anterior tooth movement in sliding mechanics. Am J Orthod Dentofacial Orthop 2009; 135:36-41. https://doi.org/10.1016/j.ajodo.2007.01.034