Class II Division 1 in New Dimension: Role of Posterior Transverse Interarch Discrepancy in Class II Division 1 Malocclusion During the Mixed Dentition Period

• Main Authors: Deepika Kapoor, Deepanshu Garg, Neeraj Mahajan, Samriti Bansal, Anshul Sawhney, Jasvir Kaur, Shashank Tripathi, Neha Malaviya
• Format: Article
• Language: English
• Published: JCDR Research and Publications Private Limited 2015-07-01
• Series: Journal of Clinical and Diagnostic Research
• Subjects: craniofacial skeletal features; intermolar width; mandibular retrusion; occlusion
• Online Access: https://jcdr.net/articles/PDF/6231/13665_CE[Ra]_F(P)_PF1(PAK)_PFA(P)_PF2(PAG).pdf

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.