Accession Number : AD1013083

Title :   Maxillary Transverse Comparison of Skeletal Class I and Class III Patient Populations Using Cone Beam Computed Tomography

Descriptive Note : Technical Report

Corporate Author : Uniformed Services University Of The Health Sciences Bethesda United States

Personal Author(s) : Brewer,Breck S

Full Text :

Report Date : 13 Apr 2012

Pagination or Media Count : 72

Abstract : Introduction: It has been hypothesized that if hypoplasia of the maxilla occurs in one plane of space, such as the sagittal plane of many skeletal Class III patients, it will occur in multiple planes of space, including transverse. With the advent of Cone-Beam Computed Tomography (CBCT), better assessment of skeletal transverse widths can be appreciated using various landmarks in the maxilla. The aim of this study was to compare the linear widths of anterior and posterior maxillary skeletal landmarks and their subsequent anterior-to-posterior ratios in a group of Class I and Class III patients using pretreatment CBCT images. Method: Pretreatment CBCT images of forty-nine skeletal Class I patients with normal maxillary growth and thirty Class III patients with maxillary sagittal hypoplasia were evaluated. Linear transverse measurements were determined from anterior and posterior maxillary landmarks using coronal CBCT slices. Results: Widths measured between maxillary canine root apices were significantly narrower for Class III patients, while widths measured between the greater palatine foramina were significantly wider for Class III patients compared to the Class I population (P .05).No statistically significant differences were noted between the populations in first molar palatal root apices or infraorbital foramina width.

Descriptors :   xray computed tomography , teeth , jaw , face , skull , reliability , accuracy , statistical analysis , body regions , facial bones , pilot studies , tissues , algorithms

Distribution Statement : APPROVED FOR PUBLIC RELEASE