Medicine and Health Sciences Commons^™

The Effect Of Maxillary Sinus Anatomical Variations, Surgical Considerations, And Patient Factors On Volumetric Changes Following Lateral Wall Sinus Floor Elevation Technique For Up To 8 Years, Mengyi Shi

All ETDs from UAB

jectives: The aim of this retrospective study is to assess the long-term dimensional stability, or shrinkage, of the lateral window sinus grafts using cone beam computed tomography scans (CBCT) and radiographic software. Material and Methods: All patients from UAB Periodontal Graduate Clinic with available records of sinus augmentation via the lateral window approach with delayed implant placement between 2014 and 2019 were screened for having two follow up CBCT scans of diagnostic quality. The first scan must be completed within 6-9 months of lateral window sinus floor elevation (LWSFE) and prior to implant placement. The second CBCT must be taken …

The Effect Of Orthodontic Treatment With Extraction On The Upper Airway Dimensions And Three-Dimensional Morphology: A Retrospective Study Using Cone-Beam Computed Tomography Technique, Ehsan Mostaghni

Theses & Dissertations

The purpose of this study was to evaluate the effect of orthodontic treatment with and without extractions of teeth on the upper airway dimension and morphology. Records of 40 consecutively treated patients who received orthodontic treatment with or without dental extractions were evaluated. Pre-and post-treatment volumes, minimum cross-sectional areas, and linear dimensions of oropharyngeal airways were quantified using InVivo Dental 6.0 (Anatomage, San Jose, CA). Additionally, pre and post CBCT images of the upper airways were superimposed on each other using voxel-based registration and fixed coordinate system using 3D Slicer 4.1.1 (www.Slicer.org) and ITK-SNAP (http://www.itksnap.org). While the …

Radiographic Comparison Using Cbct-Pai And Volumetric Analysis Of Endodontically Treated Teeth: A Retrospective Cohort Study, Jeremy Hargrove

Theses and Dissertations

Purpose: To assess the changes in CBCT-PAI score as well as 3-D volume of periapical findings associated with endodontically treated roots and to see how these findings change over time.

Methods: Retrospective chart review with the following inclusion criteria: 1. At least one tooth was endodontically treated at the endodontic private practice; 2. Patient had a recall examination and the treated tooth was asymptomatic, functional and a CBCT was exposed; 3. CBCT interpretation found a periapical finding associated with the treated tooth; 4. A follow-up recall examination was completed and CBCT exposed. Cases that fulfilled the inclusion criteria had the …

Orthodontically Induced External Root Resorption In Extraction Versus Non-Extraction Treatment Modalities – A Retrospective Cone-Beam Computed Tomography (Cbct) Study, Jaykishan Patel

Theses & Dissertations

Purpose of this study was to evaluate orthodontically induced external apical root resorption using cone beam computed tomography in patients receiving orthodontic treatment with or without extractions. Records of 188 consecutively treated patients who received orthodontic treatment with or without extractions were evaluated. Pre-and post-treatment root lengths of maxillary incisors, volumes of maxillary central incisors, and apex displacement of either right or left maxillary central incisors were measured using Invivo 5.4 or ITK-SNAP 3.8.0 software. After adjusting for initial length, treatment duration, tooth, sex, race, bracket type, and malocclusion, maxillary incisor reduction of root length in extraction group was 0.37 …

Dental Age Estimation Of A Southern Nevada Hispanic Non-Adult Population Employing The London Atlas To Evaluate Archival Orthodontic Cone Beam Computed Tomography (Cbct) Images, Haley Buchanan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Age estimation is of societal importance for legal, forensic, and clinical reasons. The London Atlas of Human Tooth Development and Eruption, hereafter referred to as the London Atlas, was introduced as an improved method for determining dental age estimation. The London Atlas was developed from panoramic images of 528 living British Caucasian and Bangladeshi males and females aged 2 to 24 years and panoramic images of 176 archival human skeletal remains, aged 32 in utero to 2 years old, from two specimen collections (AlQahtani, Hector, & Liversidge, 2010). Further investigation is warranted to determine validity of the atlas’s use in …

A Study Of Enamel Thickness Of Permanent Maxillary Canines, Daniel Diaz Rubayo

All ETDs from UAB

Introduction: Tooth agenesis is defined as the lack of development of a tooth. Maxillary lateral incisors have been reported to be missing in 2.2% of the population in the United States of America. Two treatment options are available: opening the space to restore the missing tooth with a dental prosthesis; or close the space by moving the adjacent teeth into the space and substituting the missing lateral incisor with the maxillary canine. With a wider crown and a more convex labial surface than lateral incisors, canines require a significant amount of reduction in order to achieve an adequate occlusion and …

3-D Upper Airway Comparison Between Class I And Class Ii Adults With Excessive Daytime Sleepiness, Nga Nguyen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: The aim of the study is to determine whether there is a relationship between the risk for daytime sleepiness in adults with Class I and Class II malocclusion and the airway volume, minimum cross-sectional area, and shape at the minimum cross sectional area.

Introduction: Sleep disordered breathing (SDB) is a category of conditions defined by airway complications while a person is sleeping. Obstructive sleep apnea (OSA) is the most common of these disorders and is defined as the presence of repeated episodes of complete or partial airway obstruction, which may be associated with loud snoring and daytime sleepiness. Daytime …

Evaluation Of Volumetric Change Of Periapical Lesions After Apicoectomy As A Measure Of Postsurgical Healing Utilizing Cone Beam Computed Tomography, Eshwar Arasu

Theses and Dissertations

The aim of this study was to evaluate whether volumetric changes in persistent periapical lesions can be detected in follow-ups six months to five years after apicoectomy using cone-beam computed tomography. Patients with a previous treatment history of apicoectomy and for whom a pre-surgical CBCT scan was taken between November 2010 and December 2015 were invited to participate in the study. A post-surgical CBCT image of the treated tooth was obtained at the recall visit. Volumetric and linear measurements of periapical lesions on initial and postoperative CBCT images were performed using DiThreshGUI software and two calibrated examiners—a board-certified endodontist and …

The Effective Dose Of Different Scanning Protocols Using The Sirona Galileos® Comfort Cbct Scanner, David R. Chambers

Electronic Thesis and Dissertation Repository

Introduction: Cone Beam CT imaging is prevalent in dentistry yet much is unknown with regard to how radiation dose to the patient varies between different CBCT scanners and imaging protocols. Scanner and protocol specific effective dose calculations will aid in optimizing individualized protocols for clinical applications.

Purpose: To determine the effective dose for a range of imaging protocols using the Sirona GALILEOS Comfort CBCT scanner.

Materials and Methods: Calibrated InLight nanoDot OSL dosimeters (Landauer, Glenwood, Ill) were placed at 26 select sites in the head and neck of a modified, human tissue-equivalent RANDO phantom. Effective dose was calculated using …

Comparison Between Ceph Analysis On Lateral Cephs, Cbct Scans, And Mri Scans, Jeffrey W. Lam

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: Most current methods of obtaining images for orthodontic diagnosis and treatment planning involve the use of ionizing radiation. Given that patients often need records taken several times during treatment, an alternative should be found that does not involve ionizing radiation. Magnetic resonance imaging (MRI) exists as a possible alternative. Purpose: The purpose of this study is to compare cephalometric measurements obtained from lateral cephs, cone beam computed tomography (CBCT) scans, and MR scans. Methods: Lateral cephs, CBCTs, and MRIs were taken on 22 patients. 3 separate readers traced the images and the data was analyzed using Bland-Altman plots. Results: …

Accuracy Of Limited Field Cone Beam Computed Tomography In The Detection Of Buccal Cortical Plate Perforations Due To Periapical Lesions, Dan-Linh Ha

Theses and Dissertations

Pre-surgical planning for endodontic microsurgery is facilitated by the use of cone beam computed tomography (CBCT). The purpose of this study was to determine whether limited field CBCT accurately predicts buccal cortical plate perforations due to endodontic lesions. Thirty-five roots that underwent microsurgical root end resection were included in this study. Prior to the surgery, 90 voxel CBCTs were taken with a Carestream 9300. The scans were analyzed by an endodontic resident and oral radiologist to determine the presence of a perforation in the buccal plate. These findings were compared to the clinical appearance of the bone. There was a …

Effects Of Rapid Maxillary Expansion On Upper Airway; A 3 Dimensional Cephalometric Analysis, Yoon Hwan Chang

Master's Theses (2009 -)

The purpose of this study was to use cone-beam computed tomography (CBCT) to assess changes in the volume and cross sectional areas of the upper airway in children with maxillary constriction treated by rapid maxillary expansion (RME).

The study group consisted of 5 males and 9 females with mean age of 12.93 years with posterior cross bite and constricted maxilla who were treated with hyrax expander as part of their comprehensive orthodontic treatment. Pre and post RME CBCT scans were analyzed with 3D Dolphin 11.0 software to measure the retropalatal (RP) and retroglossal (RG) airway changes including volume and cross …

Alveolar Ridge Dimension Analysis Following Socket Preservation Using Clinical Assessment And Cone Beam Computed Tomography (Cbct)., Sayward Duggan

Theses and Dissertations

AIM: Extraction of a tooth can lead to alveolar ridge resorption which can be minimized by socket preservation. The aim of this study is to analyze vertical and horizontal alveolar ridge dimensions clinically and by CBCT immediately following extraction and 3-4 months following socket preservation. METHODS: The preserved group (P) consisted of 20 patients with1-2 non-molar teeth requiring extraction with socket preservation, while the control group (C) consisted of 5 patients requiring extraction alone. An acrylic stent was fabricated presurgically in order to measure vertical and horizontal ridge dimensions clinically and radiographically immediately following extraction and 3-4 months following socket …