The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Comparison of the predicted and achieved labiolingual inclinations of the maxillary central incisors in adult Class II division 2 malocclusions treated with clear aligners

  • Mariam Al-Samman (Department of Orthodontics, Paediatric and Community Dentistry, College of Dental Medicine, University of Sharjah) ;
  • Mais Sadek (Department of Orthodontics, Paediatric and Community Dentistry, College of Dental Medicine, University of Sharjah) ;
  • Ahmad M. Hamdan (Department of Orthodontics, Paediatric and Community Dentistry, College of Dental Medicine, University of Sharjah)
  • Received : 2024.05.20
  • Accepted : 2024.09.09
  • Published : 2024.11.25
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Abstract

Objective: This study aimed to compare the predicted and achieved labiolingual inclinations of the maxillary central incisors in adult Class II division 2 malocclusions treated with clear aligners using Power Ridges® and composite attachments. Methods: This retrospective study included 24 patients (mean age, 26.5 ± 3.3 years). The patients had Class II division 2 malocclusion and were treated with non-extraction with Invisalign® clear aligners with either Power Ridges® or composite attachments to enhance the predictability of required change in labiolingual inclination for the maxillary central incisors. Before treatment, treatment prediction and final digital models were exported as stereolithography files and superimposed using the eModel 9.0 "Compare" software. The predicted and achieved labiolingual incisor inclinations were compared. Results: The mean accuracies of the achieved inclination of the central incisors were 68.3% in the Power Ridges® group and 71.6% in the attachments group. No statistically significant differences in predictability were found between the groups (P > 0.05). A low positive correlation was observed between the predicted inclination change and the average absolute difference between the predicted and achieved inclinations (r = 0.19). Conclusions: Predicted labiolingual inclination is not fully achieved with clear aligners in both the Power Ridges® and attachment groups. Clinicians must take measures to counteract this limitation, specifically in Class II division 2 cases.

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References

  1. Nanda RS, Tosun Y. Biomechanics in orthodontics: principles and practice. Chicago: Quintessence Pub Co.; 2010. p. 99. https://search.worldcat.org/ko/title/892430513
  2. Andrews LF. The six keys to normal occlusion. Am J Orthod 1972;62:296-309. https://doi.org/10.1016/s0002-9416(72)90268-0
  3. Archambault A, Lacoursiere R, Badawi H, Major PW, Carey J, Flores-Mir C. Torque expression in stainless steel orthodontic brackets. A systematic review. Angle Orthod 2010;80:201-10. https://doi.org/10.2319/080508-352.1
  4. Wagner JA, Nikolai RJ. Stiffness of incisor segments of edgewise arches in torsion and bending. Angle Orthod 1985;55:37-50. https://doi.org/10.1043/0003-3219(1985)055<0037:Soisoe>2.0.Co;2
  5. Rauch ED. Torque and its application to orthodontics. Am J Orthod 1959;45:817-30. https://doi.org/https://doi.org/10.1016/0002-9416(59)90222-2
  6. Rossini G, Parrini S, Castroflorio T, Deregibus A, Debernardi CL. Efficacy of clear aligners in controlling orthodontic tooth movement: a systematic review. Angle Orthod 2015;85:881-9. https://doi.org/10.2319/061614-436.1
  7. Huang AT, Huang D. Power Ridges: how powerful are they? In: Huang AT, Huang D, eds. Controversies in clear aligner therapy. Cham: Springer, Cham; 2022. p. 125-34. https://doi.org/10.1007/978-3-030-92810-0_8
  8. Nucera R, Dolci C, Bellocchio AM, Costa S, Barbera S, Rustico L, et al. Effects of composite attachments on orthodontic clear aligners therapy: a systematic review. Materials (Basel) 2022;15:533. https://doi.org/10.3390/ma15020533
  9. Simon M, Keilig L, Schwarze J, Jung BA, Bourauel C. Treatment outcome and efficacy of an aligner technique - regarding incisor torque, premolar derotation and molar distalization. BMC Oral Health 2014;14:68. https://doi.org/10.1186/1472-6831-14-68
  10. Grunheid T, Gaalaas S, Hamdan H, Larson BE. Effect of clear aligner therapy on the buccolingual inclination of mandibular canines and the intercanine distance. Angle Orthod 2016;86:10-6. https://doi.org/10.2319/012615-59.1
  11. Pavoni C, Lione R, Lagana G, Cozza P. Self-ligating versus Invisalign: analysis of dento-alveolar effects. Ann Stomatol (Roma) 2011;2:23-7. https://pubmed.ncbi.nlm.nih.gov/22238719/
  12. Kravitz ND, Kusnoto B, BeGole E, Obrez A, Agran B. How well does Invisalign work? A prospective clinical study evaluating the efficacy of tooth movement with Invisalign. Am J Orthod Dentofacial Orthop 2009;135:27-35. https://doi.org/10.1016/j.ajodo.2007.05.018
  13. Haouili N, Kravitz ND, Vaid NR, Ferguson DJ, Makki L. Has Invisalign improved? A prospective follow-up study on the efficacy of tooth movement with Invisalign. Am J Orthod Dentofacial Orthop 2020;158:420-5. https://doi.org/10.1016/j.ajodo.2019.12.015
  14. Robertson L, Kaur H, Fagundes NCF, Romanyk D, Major P, Flores Mir C. Effectiveness of clear aligner therapy for orthodontic treatment: a systematic review. Orthod Craniofac Res 2020;23:133-42. https://doi.org/10.1111/ocr.12353
  15. Jiang T, Jiang YN, Chu FT, Lu PJ, Tang GH. A cone-beam computed tomographic study evaluating the efficacy of incisor movement with clear aligners: assessment of incisor pure tipping, controlled tipping, translation, and torque. Am J Orthod Dentofacial Orthop 2021;159:635-43. https://doi.org/10.1016/j.ajodo.2019.11.025
  16. Hahn W, Zapf A, Dathe H, Fialka-Fricke J, Fricke-Zech S, Gruber R, et al. Torquing an upper central incisor with aligners-acting forces and biomechanical principles. Eur J Orthod 2010;32:607-13. https://doi.org/10.1093/ejo/cjq007
  17. Gaddam R, Freer E, Kerr B, Weir T. Reliability of torque expression by the Invisalign® appliance: a retrospective study. Aust Orthod J 2021;37:3-13. https://doi.org/doi:10.21307/aoj-2021-001
  18. Karras T, Singh M, Karkazis E, Liu D, Nimeri G, Ahuja B. Efficacy of Invisalign attachments: a retrospective study. Am J Orthod Dentofacial Orthop 2021;160:250-8. https://doi.org/10.1016/j.ajodo.2020.04.028
  19. Mehta S, Patel D, Yadav S. Staging orthodontic aligners for complex orthodontic tooth movement. Turk J Orthod 2021;34:202-6. https://doi.org/10.5152/TurkJOrthod.2021.20116
  20. Adel SM, Vaid NR, El-Harouni N, Kassem H, Zaher AR. Tip, torque & rotations: how accurately do digital superimposition software packages quantify tooth movement? Prog Orthod 2022;23:8. https://doi.org/10.1186/s40510-022-00402-x
  21. Dahlberg G. Statistical methods for medical and biological students. Br Med J 1940;2:358-9. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2179091/pdf/brmedj04110-0016c.pdf 10-0016c.pdf
  22. Lin LI. A concordance correlation coefficient to evaluate reproducibility. Biometrics 1989;45:255-68. https://pubmed.ncbi.nlm.nih.gov/2720055/
  23. Danz JC, Greuter C, Sifakakis I, Fayed M, Pandis N, Katsaros C. Stability and relapse after orthodontic treatment of deep bite cases-a long-term follow-up study. Eur J Orthod 2014;36:522-30. https://doi.org/10.1093/ejo/cjs079
  24. Sandhya V, Arun AV, Reddy VP, Mahendra S, Chandrashekar BS, Aravind. Biomechanical effects of torquing on upper central incisor with thermoplastic aligner: a comparative three-dimensional finite element study with and without auxillaries. J Indian Orthod Soc 2022;56:49-56. https://doi.org/10.1177/0301574220974340
  25. Castroflorio T, Garino F, Lazzaro A, Debernardi C. Upper-incisor root control with Invisalign appliances. J Clin Orthod 2013;47:346-51; quiz 387. https://pubmed.ncbi.nlm.nih.gov/23863556/
  26. Upadhyay M, Arqub SA. Biomechanics of clear aligners: hidden truths & first principles. J World Fed Orthod 2022;11:12-21. https://doi.org/10.1016/j.ejwf.2021.11.002
  27. Simon M, Keilig L, Schwarze J, Jung BA, Bourauel C. Forces and moments generated by removable thermoplastic aligners: incisor torque, premolar derotation, and molar distalization. Am J Orthod Dentofacial Orthop 2014;145:728-36. https://doi.org/10.1016/j.ajodo.2014.03.015
  28. Cheng Y, Gao J, Fang S, Wang W, Ma Y, Jin Z. Torque movement of the upper anterior teeth using a clear aligner in cases of extraction: a finite element study. Prog Orthod 2022;23:26. https://doi.org/10.1186/s40510-022-00421-8