Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Medicine and Health Sciences
Characterization Of Rhbmp-2 Induced Heterotopic Bone Subjected To Distraction Osteogenesis, Anne J. Yoon
Characterization Of Rhbmp-2 Induced Heterotopic Bone Subjected To Distraction Osteogenesis, Anne J. Yoon
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to characterize and analyze the heterotopic bone regenerate which formed following implantation of recombinant human bone morphogenetic protein-2 (rhBMP-2) and to determine by epi-illumination, x-ray photometry and histology, if there is increased and sustained osteogenic potential present with distraction osteogenesis of this heterotopic bone. While many previous studies have documented the osteogenic potential of BMP-2, no study to date has shown the results of application of force on this ectopic bone. Our study included three control rats (non-expansion) and six experimental rats (expansion). Of the control rats, #76 (a pilot study rat) had already …
Cephalometric Analysis Using Magnetic Resonance Imaging, Wade A. Williams
Cephalometric Analysis Using Magnetic Resonance Imaging, Wade A. Williams
Loma Linda University Electronic Theses, Dissertations & Projects
Purpose: The purpose of this study was to determine if T1-weighted 3D magnetic resonance images performed at 3.0 Tesla could be used to conduct routine orthodontic cephalometric analysis.
Methods: Three cranial imaging methods were compared using sixteen non-growing subjects (10 male and 6 female) who were not claustrophobic, did not have any metallic restorations on the distal of first molars, had no medical implants and the female subjects were not pregnant. Sagittal cranial images were produced by three methods: (1) a digital lateral cephalometric (LC) radiograph (Orthophos XG Plus, SironaTM, Bensheim, Germany), (2) a 12-inch FOV cone beam …
Influence Of Mandibular Fixed Retainers On Diagnostic Quality Of Cranial Mri, Norman E. Carter
Influence Of Mandibular Fixed Retainers On Diagnostic Quality Of Cranial Mri, Norman E. Carter
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to evaluate the diagnostic quality of MR images taken on subjects with different types of orthodontic lingual retainers in place. The study provides guidelines and recommendations for use of lingual retainer materials in those patients who are or may potentially undergo routine magnetic resonance imaging. Ten subjects had impressions taken and models made for retainer tray fabrication. Removable trays with each lingual retainer material incorporated in them were fabricated from the models. Subjects underwent scans with each of the five test trays in place. T1 sagittal (T1), T2 axial (T2), gradient echo (GRE), and …
Precision Of Temporary Anchorage Device Placement With 2d Vs. 3d Diagnostic Tools And Surgical Guides, Howard Lee
Precision Of Temporary Anchorage Device Placement With 2d Vs. 3d Diagnostic Tools And Surgical Guides, Howard Lee
Loma Linda University Electronic Theses, Dissertations & Projects
Current methods of temporary anchorage device (TAD) planning and placement are performed by radiographic analysis in a two-dimensional plane that lends itself to inaccuracy secondary to variations in the angle from which the radiograph is taken, as well as the magnification of the radiographic image, resulting in an increased likelihood of placement errors. The purpose of this study was to compare a three-dimensional (3D) TAD planning and placement technique to a traditional two-dimensional (2D) technique. In the 2D group, periapical radiographs and pre-fabricated wire guides were used for planning and placement of TADs on five plastic models. For the 3D …