Effects of the cervical headgear in growing Angle Class II malocclusion patients: a prospective study

Anderson Jaña ROSA, Rizomar Ramos do NASCIMENTO, José Nelson MUCHA, Oswaldo de Vasconcellos VILELLA

Objective: Evaluate dental and skeletal changes resulting from the exclusive use of the cervical headgear for 15±4 months in the treatment of patients with Class II division 1 malocclusion. Methods: Differences between the beginning (T1) and immediately after the end of the therapy (T2) with the cervical headgear in growing patients (Experimental Group, EG, n = 23) were examined and compared, during compatible periods, with those presented by a group of untreated individuals (Control Group, CG, n =22) with similar malocclusions and chronological age. The cephalometric variables evaluated were: ANB, GoGn.SN, AO-BO, S'-ANS, S'-A, S'-B, S'-Pog and S'-U6 (maxillary first molar). The Shapiro-Wilk and Levene tests were used to evaluate the results. Results: Significant differences were found relative to the ANB, S'-U6, AO-BO, S'-ANS, S'-A, S'-B and S'-Pog variables between T1 and T2 when comparing both groups. No statistically significant variation was found regarding the GoGn.SN angle. Conclusions: The use of cervical headgear promoted distal movement of the maxillary first molars and restricted the anterior displacement of the maxilla, without significantly affecting the GoGn.SN angle.

Keywords: Extraoral traction appliances. Malocclusion, Angle Class II. Tooth movement techniques. Orthodontics.

How to cite: Rosa AJ, Nascimento RR, Mucha JN, Vilella OV. Effects of the cervical headgear in growing Angle Class II malocclusion patients: a prospective study. Dental Press J Orthod. 2020 Mar-Apr;25(2):25-31. DOI: https://doi.org/10.1590/2177-6709.25.2.025-031.oar

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