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Orthodontics and Orthodontology Commons

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Following Surgically Assisted Rapid Palatal Expansion, Do Tooth-Borne Or Bone-Borne Appliances Provide More Skeletal Expansion And Dental Expansion?, Adrien Hamedi-Sangsari 2019 University of Pennsylvania

Following Surgically Assisted Rapid Palatal Expansion, Do Tooth-Borne Or Bone-Borne Appliances Provide More Skeletal Expansion And Dental Expansion?, Adrien Hamedi-Sangsari

Dental Theses

Abstract

Purpose: The aim of this study is to compare the outcome measures of skeletal and dental expansion with Bone-Borne (BB) versus Tooth-Borne (TB) appliances following SARPE. This study is being done to provide quantitative measurements that will help the oral surgeon and orthodontist in selecting the appliance with, on average, the greatest amount of skeletal expansion and the least amount of dental expansion.

Methods: A computerized database search was performed using PubMed, EBSCO, Cochrane, Scopus, Web of Science, and Google Scholar on publications in reputable oral surgery and orthodontic journals. A systematic review and meta-analysis was then completed with ...


Acquired Bracket Pellicle Modulation Via Exposure To Histatin 3, Niklas W. Neilson 2018 The University of Western Ontario

Acquired Bracket Pellicle Modulation Via Exposure To Histatin 3, Niklas W. Neilson

Electronic Thesis and Dissertation Repository

Objectives: To investigate the effect of histatin 3 on the protein pellicle formation on the orthodontic bracket surface.

Methods: Our study consisted of 4 sample groups. A sample of human parotid saliva without histatin functioned as a control group. Other groups were immersed with or without histatin 3 and human parotid saliva. Each group was incubated for 2 hours in their respective substrate at 37°C. The acquired pellicle from each group was harvested, then analyzed with SDS-PAGE and LC-ESI-MS/MS.

Results: Thirty-nine proteins were identified in the control group, 18 were identified in group 2, and 21 were identified ...


Diagnostic Ultrasound In The Measurement Of Cortical Bone Thickness In Porcine Mandibular Specimens, Diego Diaz Guerrero 2018 The University of Western Ontario

Diagnostic Ultrasound In The Measurement Of Cortical Bone Thickness In Porcine Mandibular Specimens, Diego Diaz Guerrero

Electronic Thesis and Dissertation Repository

Introduction: Ultrasound (US) is a safe, non-invasive diagnostic method that has been used in various capacities in medicine and dentistry. Periodontal bone loss, bony dehiscence, and gingival recession have been reported as potential risks of orthodontic treatment in patients who have decreased buccal/labial bone thickness. US has the potential to aid in the diagnosis of patients at risk for these possible complications of orthodontic treatment. Purpose: To validate the use of a novel US device in the measurement of buccal cortical bone (BCB) thickness over roots in porcine mandibles. Materials and Methods: Jaw and cortical bone models were constructed ...


Effect Of Clear Aligner Therapy On Masticatory Muscle Tenderness And Orthodontic Pain, Johnny Tran 2018 The University of Western Ontario

Effect Of Clear Aligner Therapy On Masticatory Muscle Tenderness And Orthodontic Pain, Johnny Tran

Electronic Thesis and Dissertation Repository

Introduction: Patients undergoing orthodontic clear aligner therapy (CAT) may experience discomfort in their teeth and jaws, and often present with visible wear on their aligners. This multi-site prospective clinical study aimed to analyze tooth pain and masticatory muscle tenderness in patients subjected to CAT with Invisalign©.

Methods: Twenty-seven healthy adults undergoing treatment with Invisalign© were recruited from three university-based orthodontic clinics. Tooth pain and muscle tenderness were reported on visual analog scales in pain diaries prior to, and after starting CAT. Pressure pain thresholds (PPT) measured using pressure algometers were used to assess somatosensory changes in trigeminal and extra-trigeminal locations ...


Estimating Root Volumes By Limited Segmentation: A Volumetric Analysis Of Cbct And Micro-Ct Data, Theresa C. Baldwin 2018 Loma Linda University

Estimating Root Volumes By Limited Segmentation: A Volumetric Analysis Of Cbct And Micro-Ct Data, Theresa C. Baldwin

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The increased dimensional accuracy of images provided by cone beam computed tomography (CBCT) scans allows for more in-depth diagnosis and treatment planning. Expedient interpolation of segmented data that provides clinically acceptable results will encourage clinicians to frequently use CBCT images for clinical/radiographic evaluation. Some of these applications include, quantification of root resorption, determination of force required for specific tooth movements, and customized appliances. Purpose: The study had two purposes. The first was to compare the accuracy of digital tooth volumes acquired from CBCT to the gold standard, micro-computed tomography (micro-CT). The second was to determine the effect of ...


Effect Of Centric Interference On Canine Tooth Wear, Andrey Gaiduchik 2018 Loma Linda University

Effect Of Centric Interference On Canine Tooth Wear, Andrey Gaiduchik

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The aim of this study was to determine the long term effect of a centric interference on canine tooth wear (CTW) and on centric occlusion (CO) and maximal intercuspation (MIP) variance. Materials and Methods: Thirty subjects, 11 males and 19 females, were selected based on inclusion and exclusion criteria. Changes in enamel volume were studied between the end of orthodontic treatment (T2) and at least seven years post treatment (T4). All models were scanned using a high resolution desktop scanner, (OrthoInsight 3D Scanner™, MotionView LLC). T4 models were articulated using a Panadent® Articulator and evaluated for dental interferences and ...


Accuracy Of Cephalometric Analyses And Tooth Movements Of Conventional Vs Cbct-Generated Cephalograms, Thanh Khong Ng 2018 Loma Linda University

Accuracy Of Cephalometric Analyses And Tooth Movements Of Conventional Vs Cbct-Generated Cephalograms, Thanh Khong Ng

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The aim of this study was to compare Ricketts and American Board of Orthodontics (ABO) cephalometric measurements and tooth movements from tracings between conventional lateral cephalograms (Sirona Orthophos XG Plus, Charlotte, NC) and CBCT-generated cephalograms (NewTom 5G; QR srl, Verona, Italy). Materials and Methods: Patients who had bilateral Angle’s class II molar were evaluated. Pre-treatment (T1) and post-treatment (T2) conventional lateral cephalograms (CLCs) and CBCT-generated lateral cephalograms (CBLCs) were traced in Quick Ceph Studio using Ricketts and ABO cephalometric analyses. Linear and angular cephalometric measurements from tracings were compared between the two radiographic modalities using one-sample Wilcoxon signed ...


Measuring A Sample Of Orthodontic Models/Panographs At Llusd Using The Cr-Eval, Jonathan Michael Drew 2018 Loma Linda University

Measuring A Sample Of Orthodontic Models/Panographs At Llusd Using The Cr-Eval, Jonathan Michael Drew

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: An index must be used to quantify the improvement in the position of teeth treated by orthodontics. The Cast-Radiograph Evaluation is the index used by the American Board of Orthodontics. The purpose of this study is to use this index to evaluate treatment outcomes in the graduate orthodontic clinic at Loma Linda University from 2012-2016. Materials and Methods: Patients included were comprehensively treated, debonded between 1/1/2012 and 12/31/2016, and under age 30. A total of 80 patients were randomly selected, with 16 coming from each year. The ABO DI was used to score the T1 ...


Reliability And Accuracy Of A Novel Photogrammetric Orthodontic Monitoring System, Vahe Ohanesian 2018 Loma Linda University

Reliability And Accuracy Of A Novel Photogrammetric Orthodontic Monitoring System, Vahe Ohanesian

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: This study quantitatively investigated the reliability and accuracy of Dental Monitoring’sTM proprietary orthodontic tracking system in comparison to an established reference. Materials and Methods: Intraoral scans (True Definition Scanner, 3MTM) and video scans (iPhone 7, AppleTM) were taken of 30 subjects undergoing comprehensive orthodontic treatment at Loma Linda University’s Graduate Orthodontic Clinic at T1 (initial) and T2 (3 months later). At each time point, an intraoral scan was taken by the operator followed by three video scans- two taken by the patient and one by the operator. Three linear and three angular measurements were analyzed using Dental ...


A Retrospective Cephalometric Growth Study Of Sagittal Airway In Skeletal Class Ii Patients, Sue V. Kim 2018 Loma Linda University

A Retrospective Cephalometric Growth Study Of Sagittal Airway In Skeletal Class Ii Patients, Sue V. Kim

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The study retrospectively determined the average sagittal pharyngeal airway widths in Class II males and females between 7 to 16 years of age and changes in sagittal airway with increasing age. Additionally, this study determined whether average airway differs between gender at each age and compared the average airway widths in relation to increasing age between Class I and II patients. Materials and Methods: Longitudinal cephalograms were digitally traced for 38 untreated subjects (23 males, 15 females) from age 7 to 16 with skeletal and dental Class II patterns. These records were previously taken through growth studies conducted between ...


Orthodontic Treatment Planning Using Direct Visual Approximation Of Arch Length Discrepancy And Cephalometric Analyses, Kathleen Rouse Vaught 2018 Marquette University

Orthodontic Treatment Planning Using Direct Visual Approximation Of Arch Length Discrepancy And Cephalometric Analyses, Kathleen Rouse Vaught

Master's Theses (2009 -)

Introduction: Space analysis and radiographic analyses are crucial elements in developing an orthodontic treatment plan. It is imperative that the orthodontist makes accurate measurements in order to come up with the most effective treatment options for each patient. Some practitioners refrain from direct measurements to determine arch length discrepancies and instead determine the amount of crowding by using direct visual approximation. In addition, more orthodontists do not routinely trace all cephalograms taken. If more and more orthodontists are using direct visual approximation to determine angular cephalometric measurements, it is important to assess the accuracy and reliability of these measurements. This ...


Orthodontic Open-Coil Spring Deactivation Forces Differ With Varying Activation Levels, Ryan Lubinsky 2018 Marquette University

Orthodontic Open-Coil Spring Deactivation Forces Differ With Varying Activation Levels, Ryan Lubinsky

Master's Theses (2009 -)

Coil springs are used in orthodontics to deliver forces to move teeth. However, the optimal amount of activation to produce predictable, continuous deactivation forces, for the purpose of orthodontic tooth movement, is unclear. The purpose of this study was to evaluate the deactivation force characteristics of nickel-titanium open-coil springs after varying levels of activation. Methods: Four open-coil spring products were evaluated: Dentsply GAC 100 gram and 150 gram, Orthoclassic Orthodontics Medium 150 gram, and American Orthodontics nickel-titanium springs. Open-coil springs were compressed (activation) with a universal testing machine to 20, 40, 60, or 80% of original length (15 mm; n ...


Effect Of Folate On Endoplasmic Reticulum Stress Caused By Hypoxia, Paul Kim, Shub Dhillon, Mahsa Mortazavi, Marie M. Tolarova, Mirek Tolar 2018 University of the Pacific

Effect Of Folate On Endoplasmic Reticulum Stress Caused By Hypoxia, Paul Kim, Shub Dhillon, Mahsa Mortazavi, Marie M. Tolarova, Mirek Tolar

Excellence Day

Endoplasmic reticulum (ER) stress is involved in the pathogenesis of congenital cardiac defects, intrauterine growth restriction, craniofacial anomalies, and many common diseases. The purpose of this study was to test if folic acid (FA) can mitigate ER stress or improve recovery of cells from ER stress.


Condylar Degeneration In Patients With Dental Open Bite Versus Skeletal Open Bite Utilizing Cbct, Alex Rauchle, Alston Trinh, Linda Phi, Brad Albertson, Joorok Park, Heesoo Oh 2018 University of the Pacific

Condylar Degeneration In Patients With Dental Open Bite Versus Skeletal Open Bite Utilizing Cbct, Alex Rauchle, Alston Trinh, Linda Phi, Brad Albertson, Joorok Park, Heesoo Oh

Excellence Day

Idiopathic condylar resorption (ICR) is a condition in which either one or both condyles undergo degeneration. Bilateral TMJ involvement presents as a clockwise rotation of the mandible in the posterior-inferior direction, resulting in an anterior open bite. The purpose of the study was to assess TMJ condylar degeneration in dental open bites compared to skeletal open bites.


Changes In Cephalometric Measurements In Adult Patients Following Orthodontic Treatment With Premolar Extractions Versus Non-Extraction, Byron Chou, David Dang, Adrienne Joy, David Chambers, Joorok Park, Heesoo Oh 2018 University of the Pacific

Changes In Cephalometric Measurements In Adult Patients Following Orthodontic Treatment With Premolar Extractions Versus Non-Extraction, Byron Chou, David Dang, Adrienne Joy, David Chambers, Joorok Park, Heesoo Oh

Excellence Day

Extraction of premolars is indicated as part of orthodontic treatment for patients who have severe crowding or protrusion of incisors. CBCT can be used to locate cephalometric landmarks in 3D. The purpose of this study was to determine whether there are differences in sagittal, transverse, and vertical skeletal and dental dimensions for adult patients who were treated with premolar extractions in conjunction with orthodontic treatment compared to those who received orthodontic treatment without extractions.


Changes In Airway Volume In Adult Patients Following Orthodontic Treatment With Premolar Extractions Versus Non-Extraction, Sunny Jisun Lee, Allison Kawata, Hayoung Michael Shin, David Chambers, Joorok Park, Heesoo Oh 2018 University of the Pacific

Changes In Airway Volume In Adult Patients Following Orthodontic Treatment With Premolar Extractions Versus Non-Extraction, Sunny Jisun Lee, Allison Kawata, Hayoung Michael Shin, David Chambers, Joorok Park, Heesoo Oh

Excellence Day

Recent concerns about the prevalence of obstructive sleep apnea (OSA) and its negative sequelae have led to investigations of how manipulation of the dentofacial complex may affect airway problems. CBCT can be used to measure airway dimensions of patients. Extraction of premolars is indicated as part of orthodontic treatment for patients who have severe crowding or protrusion of incisors. Some have suggested that the reduction in arch circumference after premolar extraction would lead to decreased airway volume, which may predispose a patient for sleep disordered breathing (SDB). The purpose of this study was to determine whether there is a significant ...


Rankl Deletion In Periodontal Ligament And Bone Lining Cells Blocks Orthodontic Tooth Movement, Chia-Ying Yang, Hyeran H. Jeon, Ahmed Alshabab, Yu Jin Lee, Chun-Hsi Chung 2018 University of Pennsylvania

Rankl Deletion In Periodontal Ligament And Bone Lining Cells Blocks Orthodontic Tooth Movement, Chia-Ying Yang, Hyeran H. Jeon, Ahmed Alshabab, Yu Jin Lee, Chun-Hsi Chung

Departmental Papers (Dental)

The bone remodeling process in response to orthodontic forces requires the activity of osteoclasts to allow teeth to move in the direction of the force applied. Receptor activator of nuclear factor-κB ligand (RANKL) is essential for this process although its cellular source in response to orthodontic forces has not been determined. Orthodontic tooth movement is considered to be an aseptic inflammatory process that is stimulated by leukocytes inclduing T and B lymphocytes which are presumed to stimulate bone resorption. We determined whether periodontal ligament and bone lining cells were an essential source of RANKL by tamoxifen induced deletion of RANKL ...


Authentic Leadership In Illness Blogs: What We Can Learn From Jaw Surgery Bloggers, Marilyn Mitchell 2018 Bond University

Authentic Leadership In Illness Blogs: What We Can Learn From Jaw Surgery Bloggers, Marilyn Mitchell

Marilyn Mitchell

This paper argues that authentic leadership theory provides a useful model for explaining the communication of orthognathic or jaw surgery bloggers. Previous studies concluded that illness blogs can empower patients, but no research considered any leadership theory as a model for blogging. For this study, 24 publicly available blogs were analyzed to find expressions that demonstrated each of the four components of authentic leadership, which are self-awareness, relational transparency, communication based upon an internalized moral perspective, and balanced processing of information. The research also analyzed blog comments to find expressions that demonstrated followers’ development of the positive psychological capacities of ...


Evaluation Of Fit For 3d Printed Retainers As Compared To Thermoform Retainers, David J. Cole 2018 Virginia Commonwealth University

Evaluation Of Fit For 3d Printed Retainers As Compared To Thermoform Retainers, David J. Cole

Theses and Dissertations

ABSTRACT

EVALUATION OF FIT FOR 3D PRINTED RETAINERS AS COMPARED TO THERMOFORM RETAINERS

By David Cole, D.M.D.

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University

Thesis Directors: Eser Tüfekçi, D.D.S., M.S., Ph.D., M.S.H.A.

Professor, Department of Orthodontics

Sompop Bencharit, D.D.S., M.S., Ph.D.

Associate Professor and Director of Digital Dentistry, Department of General Practice

Introduction: Despite recent advances in three-dimensional (3D) printing, little information is available on 3D printed retainers

Methods: Three reference models ...


The Effect Of Mechanical Vibration On Pain And Rate Of Tooth Movement During Initial Orthodontic Alignment, Leslie Ellingson 2017 University of Nebraska Medical Center

The Effect Of Mechanical Vibration On Pain And Rate Of Tooth Movement During Initial Orthodontic Alignment, Leslie Ellingson

Theses & Dissertations

Purpose: The purpose of this investigation was to evaluate the effect of mechanical vibration on pain experienced and rate of tooth movement (OTM) during the initial alignment phase of orthodontic treatment.

Materials and Methods: Participants were randomly allocated to control, low frequency or high frequency. An electric toothbrush was modified to provide high frequency vibration. A low frequency vibration device was acquired from a commercial vendor. Experimental groups applied vibration to the dentition for 20 minutes daily. All participants completed questionnaires using visual analog scales at five time points. Pain experience was measured in millimeters (mm) with the scale measuring ...


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