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首页> 外文期刊>Journal of Clinical and Diagnostic Research >Class II Division 1 in New Dimension: Role of Posterior Transverse Interarch Discrepancy in Class II Division 1 Malocclusion During the Mixed Dentition Period
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Class II Division 1 in New Dimension: Role of Posterior Transverse Interarch Discrepancy in Class II Division 1 Malocclusion During the Mixed Dentition Period

机译：新维度的II级1区：后牙横交间隙差异在混合齿列期间在II级1区错牙合中的作用

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Introduction: Posterior transverse discrepancy as seen in some cases of Class II Division 1 malocclusion in mixed dentition period can be related to typical skeletofacial characteristics. These features when studied early in the mixed dentition period give a clear view of the desired appropriate treatment plan in a particular case. Aim: The purpose of this study was to establish a simple method to determine the posterior (intermolar) transverse discrepancy and craniofacial skeletal features between the dental arches during the mixed dentition in a sample of Class II Division 1 patients to provide diagnostic and therapeutic guidance in the early approach. Materials and Methods: A sample of 60 Class II Division 1 patients in mixed dention that were divided into 30 Class II Division 1 patients with posterior transverse interarch discrepancy {Class II (I) PTID group} and 30 Class II Division 1 patients without posterior transverse interarch discrepancy {Class II (I) NPTID group}. Thirty Class I subjects in mixed dentition were included as control. Results: The skeletal features of the Class II group without PTID are those of the skeletal Class II associated with ?anatomic? mandibular retrusion (due to a micrognathic mandible) and those of the Class II group with PTID as skeletal Class II associated with only a ?functional? mandibular retrusion (due to a posteriorly displaced mandible of normal size). Conclusion: This study confirmed the role of occlusion in the control of maxillomandibular skeletal relationships.The treatment strategies could be planned on the basis of the transverse component of Class II Division 1 groups in the mixed dentition period.
机译：简介：在混合牙列期间，在II类1分类1错牙合的某些情况下观察到的后横向差异可能与典型的骨骼面部特征有关。当在混合牙列期的早期研究这些特征时，可以清楚地看到在特定情况下所需的适当治疗方案。目的：本研究的目的是建立一种简单的方法来确定II类1分类患者在混合牙列期间牙弓之间的后（磨牙间）横向差异和颅面骨骼特征，以提供诊断和治疗指导。早期方法。材料和方法：将60例混合凹位的II类1分类患者分为30个具有后横弓间隙差异的II类1分类患者{II（I）PTID组}和30个无后交叉性的II类1分类患者interarch差异{II（I）类NPTID组}。混合牙列的30个I类受试者作为对照。结果：没有PTID的II类组的骨骼特征是与“解剖”相关的II类骨骼的特征。下颌骨退缩（由于微颌颌下颌骨退缩）以及PTID为骨骼II类的II类组仅与功能相关？下颌后退（由于下颌骨向后移位，尺寸正常）。结论：本研究证实了咬合在控制上颌下颌骨关系中的作用。可以根据混合牙列期II类1分类组的横向成分制定治疗策略。

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