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Comparative Study
. 2014 Jul;84(4):642-8.
doi: 10.2319/080513-584.1. Epub 2013 Nov 25.

Modified tandem traction bow appliance compared with facemask therapy in treating Class III malocclusions

Tuba Tortop  1 , Emine Kaygisiz, Deniz Gencer, Sema Yuksel, Zeynep Atalay
Affiliations
Comparative Study

Modified tandem traction bow appliance compared with facemask therapy in treating Class III malocclusions

Tuba Tortop et al. Angle Orthod. 2014 Jul.

Abstract

Objective: To compare the effects of the modified tandem traction bow appliance (MTTBA) and the facemask in treating patients with Class III malocclusion.

Materials and methods: The material consisted of the pre-post treatment\pre-post observation lateral cephalograms of 65 subjects with skeletal and dental Class III malocclusion. In the first group 21 patients (mean age: 10 years, 6 months) were treated with a Delaire-type facemask (FM). In the second group 22 patients treated (mean age: 10 years) with MTTBA. The remaining 22 children (mean age: 9 years, 7 months) were observed without treatment for 11 months.

Results: Increase in SNA, N-FH ⊥ A, and ANB angles were significantly greater in the treatment groups compared to the control group. However, ANB angle showed a significantly greater increase in the FM group (2.8 ± 0.30°) than in the MTTBA group (2.0 ± 0.18°). The overjet and molar relation increased significantly in both treatment groups, but in the FM group (5.2 ± 0.40 mm) increase in overjet was significantly greater than in the MTTBA group (4.0 ± 0.27 mm). Mesial movement of upper molar and incisor were found to be greater in the FM group compared to the modified TTBA group.

Conclusions: Both appliances were found to be effective in the treatment of Class III malocclusion. Their skeletal and dental effects showed differences due to their design.

Keywords: Class III malocclusion; Facemask; Tandem traction bow.

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Figures

Figure 1.
Figure 1.
Delaire-type facemask application.
Figure 2.
Figure 2.
Modified TTBA.
Figure 3.
Figure 3.
Cephalometric measurements: 1. SN; 2. SNA; 3. SNB; 4. ANB; 5. CoA; 6. CoGn; 7. N ⊥ FH-A; 8. N ⊥ FH-Pg; 9. N-Pg ⊥ A; 10. SN/GoGn; 11. ANS-PNS/Go-Me; 12. SN/ANS-PNS; 13. ANS-Me; 14. overbite; 15. overjet; 16. molar relation; 17. upper molar/ANS-PNS; 18. lower molar/Go-Me; 19. upper incisor/NA; and 20. lower incisor/NB.
Figure 4.
Figure 4.
(a) Measurements on total superimposition: 1. point A-T; 2. point A-TW; 3. Pogonion-T; and 4. Pogonion-TW. (b) Measurements on maxillary local superimposition: 5. upper molar-T; 6. upper molar-TW; 7. upper incisor-T; and 8. upper incisor-TW. (c) Measurements on mandibular local superimposition: 9. lower molar-T; 10. lower molar-TW; 11. lower incisor-T; and 12. lower incisor-TW.
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References

    1. Bacetti T, Franchi L, McNamara JA., Jr Treatment and posttreatment changes after rapid maxillary expansion and facemask therapy. Am J Orthod Dentofacial Orthop. 2000;118:404–413. - PubMed
    1. De Toffol L, Pavoni C, Bacetti T, Franchi L, Cozza P. Orthopedic treatment outcomes in Class III malocclusion: a systematic review. Angle Orthod. 2008;78:561–573. - PubMed
    1. Ngan P, Hägg U, Yiu C, Merwin D, Wei SHY. Soft tissue and dentoskeletal profile changes associated with maxillary expansion and protraction headgear treatment. Am J Orthod Dentofacial Orthop. 1996;109:38–49. - PubMed
    1. Vaughn GA, Mason B, Moon HB, Turley PK. The effects of maxillary protraction therapy with or without rapid palatal expansion: a prospective, randomized trial. Am J Orthod Dentofacial Orthop. 2005;128:299–309. - PubMed
    1. Chun Y, Jeong SG, Row J, Yang SJ. A new appliance for orthopedic correction of Class III malocclusion. J Clin Orthod. 1999;33:705–711. - PubMed

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