Evaluation assessment of dentoskeletal changes produced by the Jasper Jumper appliance and the cervical headgear, both followed by the fixed appliance therapy, for Class II, Division 1 treatment. / Avaliação comparativa das alterações dentoesqueléticas promovidas pelos aparelhos Jasper Jumper e Extrabucal com ancoragem cervical , ambos associados à aparelhagem fixa no tratamento da Classe II, divisão 1, de Angle.
AUTOR(ES)
Jose Norberto de Oliveira Junior
DATA DE PUBLICAÇÃO
2002
RESUMO
The objective of this cephalometric study was to compare the dentoskeletal effects of the Jasper Jumper appliance and the cervical headgear, both associated with the Edgewise appliance, for the treatment of Class II, Division 1 malocclusion. All measurements were obtained for each patient on two lateral headfilms, at pretreatment and posttreatment. The Jasper Jumper group consisted of 25 patients with initial mean age of 11.85 years and an average treatment time of 1.96 years. The second group, treated with the cervical headgear, consisted of 25 patients with initial mean age of 12.29 years and an average treatment time of 1.90 years. In all patients, Class II molar relationships were successfully corrected to Class I molar relationships. A sample of 50 treated patients was compared to a group of 25 untreated patients, with initial mean age of 11.82 years and an average treatment time of 1.95 years. The results showed that the cervical headgear group demonstrated a restriction in the forward growth of the maxilla, while the mandibular growth is similar of the three groups. The maxilomandibular relationship improved the both group treated. In addition, there were no statistically significant differences in the craniofacial growth direction between the three groups. The cervical headgear group produced a greater retrusion of the upper incisors, when compared to the control. While, the Jasper Jumper appliance provided greater statiscally significant dentoalveolar effects, with a mesial movement of the lower molars. The lower incisors demonstrated both proclination and labial tipping with the Jasper Jumper appliance, when compared to the untreated group. It was concluded that the main effects for Class II treatment were mostly dentoalveolar, with a smaller skeletal effects.
ASSUNTO(S)
aparelho de ancoragem extrabucal maloclusão de angle classe ii ancoragem (odontologia) cefalometria (odontologia)
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