de Oliveira José Norberto, Rodrigues de Almeida Renato, Rodrigues de Almeida Marcio, de Oliveira José Norberto
Lavras Dental School, Lavras, Brazil.
Am J Orthod Dentofacial Orthop. 2007 Jul;132(1):54-62. doi: 10.1016/j.ajodo.2005.07.028.
INTRODUCTION The objective of this controlled clinical study was to compare the dentoskeletal effects of the Jasper jumper with those of cervical headgear, when both are used with edgewise appliances to correct Class II Division 1 malocclusion.
Lateral cephalograms of 75 patients were divided into 3 groups of 25. The control group included untreated Class II children with an initial mean age of 11.82 years (range, 9.35-14.84 years); they were followed without treatment for a mean period of 1.95 years (range, 0.90-3.95 years). The Jasper jumper group had an initial mean age of 11.86 years (range, 9.45-14.94 years); they were treated for a mean period of 1.96 years (range, 0.93-3.98 years). The cervical headgear group had an initial mean age of 12.29 years (range, 9.95-15.24 years); they were treated for an average of 1.88 years (range, 0.95-3.95 years). Comparison of the initial measurements showed that the 3 groups were similar at pretreatment, thus allowing direct comparisons. Analysis of variance (ANOVA) and the Tukey test were applied for comparison of the groups.
Different appliances yielded specific effects on several components (skeletal and dentoalveolar) evaluated. Anterior maxillary growth was significantly restricted by the cervical headgear. Mandibular growth was similar in all 3 groups, although it was slightly greater in the Jasper jumper group. The experimental groups had similar improvements in maxillomandibular relationshipd. The pattern of craniofacial growth was not significantly different between groups. The most significant effect on the maxillary dentoalveolar component was retrusion of the maxillary incisors by the cervical headgear. The effects observed for the Jasper jumper group were primarily related to the mandibular dentoalveolar component, including labial tipping and protrusion of the mandibular incisors, and mesial movement and extrusion of the mandibular molars compared with the control group.
The headgear appliance corrected the Class II malocclusion mostly by anterior maxillary restriction and maxillary dentoalveolar effects. Correction of the Class II malocclusion with the Jasper jumper appliance was largely due to mandibular dentoalveolar effects rather than skeletal effects.
引言 本对照临床研究的目的是比较使用Jasper Jumper矫治器和高位头帽矫治器与方丝弓矫治器联合使用时，对安氏II类1分类错牙合畸形的牙颌面影响。
75例患者的头颅侧位片被分为3组，每组25例。对照组包括未经治疗的安氏II类儿童，初始平均年龄为11.82岁（范围9.35 - 14.84岁）；随访观察未治疗，平均观察期为1.95年（范围0.90 - 3.95年）。Jasper Jumper矫治器组初始平均年龄为11.86岁（范围9.45 - 14.94岁）；治疗平均时间为1.�6年（范围0.93 - 3.98年）。高位头帽矫治器组初始平均年龄为12.29岁（范围9.95 - 15.24岁）；平均治疗时间为1.88年（范围0.95 - 3.95年）。初始测量结果比较显示，3组在治疗前相似，因此可进行直接比较。采用方差分析（ANOVA）和Tukey检验对各组进行比较。
不同矫治器对评估的几个组成部分（骨骼和牙牙槽）产生了特定影响。高位头帽矫治器显著限制了上颌前部生长。所有3组下颌生长相似，尽管Jasper Jumper矫治器组稍大。实验组在上下颌关系方面有相似改善。各组间颅面生长模式无显著差异。对上颌牙牙槽组成部分最显著的影响是高位头帽矫治器使上颌切牙后缩。与对照组相比，Jasper Jumper矫治器组观察到的影响主要与下颌牙牙槽组成部分有关，包括下颌切牙唇倾和前突，以及下颌磨牙近中移动和伸长。
头帽矫治器主要通过限制上颌前部和上颌牙牙槽效应来矫正安氏II类错牙合畸形。使用Jasper Jumper矫治器矫正安氏II类错牙合畸形主要是由于下颌牙牙槽效应而非骨骼效应。
