Studying the Prevalence and Etiology of Class II Subdivision Malocclusion Utilizing Cone-Beam Computed Tomography
Abstract
Treatment of the Class II subdivision malocclusion has long been a challenge for orthodontists. Asymmetric occlusal relationships can occur due to any number of combinations of dentoalveolar or skeletal deviations. Identifying the etiology of asymmetry allows the clinician to make the most prudent treatment decisions and ultimately, achieve optimal treatment outcomes. It was noted by Edward Angle that there seemed to be a higher occurrence of asymmetric occlusion in the Class II Division 2 (II/2) malocclusion than the Class II Division 1 (II/1) malocclusion. The Class II/2 phenotype is unique in its presentation. Further, the morphologic features of the Class II/2 malocclusion are so distinct and consistent, that it often has little in common with the Class II/1 malocclusion other than the Class II molar relationship. Despite these differences, the literature is replete with Class II studies that fail to make the distinction between Class II/1 and Class II/2 malocclusions. Grouping the two Class II types together potentially leads to misleading results and conclusions. Another potential source of error in traditional studies of asymmetry in Class I malocclusions is the use of conventional radiographic techniques in the determination of dentoalveolar and skeletal asymmetries. Cone-beam computed tomography (CBCT) eliminates magnification error and many of the problems associated with traditional imaging methods and is more ideally suited to the study of asymmetry. The aim of this study was to 1) determine the prevalence of subdivision malocclusion in Class II/1 and Class II/2 subtypes and 2) compare bilateral dentoalveolar and skeletal linear measurements between patients with Class II/1 subdivision and Class II/2 subdivision malocclusions using pretreatment CBCT slices.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 24, 2013
- Accession Number
- AD1012894
Entities
People
- William M. Anderson
Organizations
- Uniformed Services University of the Health Sciences