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Comparative evaluation of molar distalization therapy with erupted second molar: Segmented versus Quad Pendulum appliance.
Prog Orthod. 2014; 15:49.PO

Abstract

BACKGROUND

There are controversial opinions about the effect of erupted second molars on distalization of the first molars. Most of the distalizing devices are anchored on the first molars, without including second molars; so, differences between sequentially distalize maxillary molars (second molar followed by the first molar) or distalize second and first molars together are not clear. The aim of the study was to compare sequential versus simultaneous molar distalization therapy with erupted second molar using two different modified Pendulum appliances followed by fixed appliances.

METHODS

The treatment sample consisted of 35 class II malocclusion subjects, divided in two groups: group 1 consisted of 24 patients (13 males and 11 females) with a mean pre-treatment age of 12.9 years, treated with the Segmented Pendulum (SP) and fixed appliances; group 2 consisted of 11 patients (6 males and 5 females) with a mean pre-treatment age of 13.2 years, treated with the Quad Pendulum (QP) and fixed appliances. Lateral cephalograms were obtained before treatment (T1), at the end of distalization (T2), and at the end of orthodontic fixed appliance therapy (T3). A Student t test was used to identify significant between-group differences between T1 to T2, T2 to T3, and T1 to T3.

RESULTS

QP and SP were equally effective in distalizing maxillary molars (3.5 and 4 mm, respectively) between T1 and T2; however, the maxillary first molar showed less distal tipping (4.6° vs. 9.6°) and more extrusion (1.1 vs. 0.2 mm) in the QP group than in the SP group, as well as the vertical facial dimension, which increased more in the QP group (1.2°) than in the SP group (0.7°). At T3, the QP group maintained greater increase in lower anterior facial height and molar extrusion and decrease in overbite than the SP group.

CONCLUSION

Quad Pendulum seems to have greater increase in vertical dimension and molar extrusion than the Segmented Pendulum.

Authors+Show Affiliations

Chairman Postgraduate Programme in Orthodontics, School of Medicine, University of Insubria, Varese, Italy. alberto.caprioglio@uninsubria.it.Professor of Orthodontics, School of Medicine, University of Cagliari, Cagliari, Italy. maurocozzani@gmail.com.Research Fellow in Orthodontics, University of Insubria, Varese, Italy. mattiafontana16@gmail.com.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

25139288

Citation

Caprioglio, Alberto, et al. "Comparative Evaluation of Molar Distalization Therapy With Erupted Second Molar: Segmented Versus Quad Pendulum Appliance." Progress in Orthodontics, vol. 15, 2014, p. 49.
Caprioglio A, Cozzani M, Fontana M. Comparative evaluation of molar distalization therapy with erupted second molar: Segmented versus Quad Pendulum appliance. Prog Orthod. 2014;15:49.
Caprioglio, A., Cozzani, M., & Fontana, M. (2014). Comparative evaluation of molar distalization therapy with erupted second molar: Segmented versus Quad Pendulum appliance. Progress in Orthodontics, 15, 49. https://doi.org/10.1186/s40510-014-0049-6
Caprioglio A, Cozzani M, Fontana M. Comparative Evaluation of Molar Distalization Therapy With Erupted Second Molar: Segmented Versus Quad Pendulum Appliance. Prog Orthod. 2014;15:49. PubMed PMID: 25139288.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative evaluation of molar distalization therapy with erupted second molar: Segmented versus Quad Pendulum appliance. AU - Caprioglio,Alberto, AU - Cozzani,Mauro, AU - Fontana,Mattia, Y1 - 2014/08/06/ PY - 2014/03/18/received PY - 2014/06/26/accepted PY - 2014/8/21/entrez PY - 2014/8/21/pubmed PY - 2016/8/3/medline KW - Class II malocclusion KW - Intraoral distalizing devices KW - Molar distalization KW - Non-compliance KW - Second molar SP - 49 EP - 49 JF - Progress in orthodontics JO - Prog Orthod VL - 15 N2 - BACKGROUND: There are controversial opinions about the effect of erupted second molars on distalization of the first molars. Most of the distalizing devices are anchored on the first molars, without including second molars; so, differences between sequentially distalize maxillary molars (second molar followed by the first molar) or distalize second and first molars together are not clear. The aim of the study was to compare sequential versus simultaneous molar distalization therapy with erupted second molar using two different modified Pendulum appliances followed by fixed appliances. METHODS: The treatment sample consisted of 35 class II malocclusion subjects, divided in two groups: group 1 consisted of 24 patients (13 males and 11 females) with a mean pre-treatment age of 12.9 years, treated with the Segmented Pendulum (SP) and fixed appliances; group 2 consisted of 11 patients (6 males and 5 females) with a mean pre-treatment age of 13.2 years, treated with the Quad Pendulum (QP) and fixed appliances. Lateral cephalograms were obtained before treatment (T1), at the end of distalization (T2), and at the end of orthodontic fixed appliance therapy (T3). A Student t test was used to identify significant between-group differences between T1 to T2, T2 to T3, and T1 to T3. RESULTS: QP and SP were equally effective in distalizing maxillary molars (3.5 and 4 mm, respectively) between T1 and T2; however, the maxillary first molar showed less distal tipping (4.6° vs. 9.6°) and more extrusion (1.1 vs. 0.2 mm) in the QP group than in the SP group, as well as the vertical facial dimension, which increased more in the QP group (1.2°) than in the SP group (0.7°). At T3, the QP group maintained greater increase in lower anterior facial height and molar extrusion and decrease in overbite than the SP group. CONCLUSION: Quad Pendulum seems to have greater increase in vertical dimension and molar extrusion than the Segmented Pendulum. SN - 2196-1042 UR - https://www.unboundmedicine.com/medline/citation/25139288/Comparative_evaluation_of_molar_distalization_therapy_with_erupted_second_molar:_Segmented_versus_Quad_Pendulum_appliance_ L2 - https://dx.doi.org/10.1186/s40510-014-0049-6 DB - PRIME DP - Unbound Medicine ER -