Brent E. Larson

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OBJECTIVES This study evaluated whether magnetic resonance imaging (MRI) and magnetic resonance (MR) phase velocity mapping could provide accurate estimates of stenosis severity and pressure gradients in aortic coarctation. BACKGROUND Clinical management of aortic coarctation requires determination of lesion location and severity and quantification of the(More)
INTRODUCTION Cone-beam computed tomography (CBCT) has become a routine imaging modality for many orthodontic clinics. However, questions remain about the amount of radiation patients are exposed to during the scans. This study determined the amounts of radiation potentially absorbed by a patient during orthodontic imaging with a CBCT machine with various(More)
OBJECTIVE To determine the influence of landmark labeling on the accuracy and precision of an indirect facial anthropometric technique. MATERIALS AND METHODS Eighteen standard linear craniofacial measurements were obtained from 10 adults using the 3dMDface system, with landmarks labeled (Labeled_3D) and without landmarks labeled (Unlabeled_3D) before(More)
INTRODUCTION Osteoclastic activity is required for orthodontic force to move teeth through alveolar bone. Bisphosphonates are drugs that inhibit osteoclast maturation, function, and survival. The aim of this study was to assess orthodontic tooth movement in rats receiving bisphosphonate treatment. METHODS Two groups of Sprague-Dawley rats were used. The(More)
OBJECTIVE To evaluate the effectiveness of computer-assisted orthodontic treatment technology to produce the tooth position prescribed by the virtual treatment plan. MATERIALS AND METHODS Posttreatment models of 23 patients treated with SureSmile were digitally superimposed on their corresponding virtual treatment plan models utilizing best-fit(More)
OBJECTIVE To determine the best technique for measuring mesial-distal tooth widths on digital models. METHODS The individual mesial-distal tooth widths were measured (first molar to first molar, maxillary and mandibular) on 32 stone casts and corresponding digital models (emodels, GeoDigm, Chanhassen, Minn). The digital models were measured using five(More)
INTRODUCTION Chairside oral scanners allow direct digital acquisition of the intraoral situation and can eliminate the need for conventional impressions. In this study, we aimed to assess accuracy, scan time, and patient acceptance of a chairside oral scanner when used for full-arch scans; these are critical factors for acceptance of this technology in the(More)
A biplanar cephalometric stereoradiographic system was used to measure maxillary positional changes during and after Le Fort I procedures for inferior or anterior repositioning of the maxilla. Of the 29 patients studied, 25 had undergone surgical maxillary advancement, and 15 had undergone inferior repositioning. These cases were divided into subgroups(More)
OBJECTIVE To estimate possible differences in skeletal asymmetry between patients with skeletal Class I and skeletal Class II relationships. MATERIALS AND METHODS Cone beam computed tomography (CBCT) images were examined from 70 consecutive patients who presented for orthodontic care and fit the inclusion criteria. Asymmetry was quantified using an(More)