Orthodontics and Orthodontology Commons^™

Correlating Vomer With Ceph Vectors In High And Low Mandibular Plane Angle Cases, Christopher James Wood

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: Growth of the maxilla and mandible follow identifiable vectors of facial growth such as the Rickett’s Facial Axis (FA) and the Down’s Y-axis (YA). The purpose of this study was to evaluate the correlation between the anterior inferior vomer axis (AIVA) and posterior inferior vomer axis (PIVA) with the FA and YA in cases with high (32 degrees and above) and low (20 degrees and below) mandibular plane angles.

Methods: Pretreatment cone beam computed tomography (CBCT) scans of 94 patients treated at the Loma Linda University Graduate Orthodontic Clinic meeting the inclusion criteria were used in this …

Effect Of Attending Doctor Changes On Orthodontic Treatment Times And Results, Emily Caskey Peppers

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The objective of this study was to determine if there was any significant difference in treatment time or results due to varying levels of attending doctor coverage in the Loma Linda University (LLU) graduate orthodontics clinic. Methods and Materials: The main study group of 191 subjects was split into high, medium and low coverage groups by primary attending doctor coverage and then by original attending doctor coverage. Treatment times, treatment results, and other variables were evaluated for each of the groups. Treatment results were evaluated using UK Peer Assessment Rating (PAR) scores. A second study group (289 subjects) included …

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: …

Comparison Of Digital And Cbct Synthesized Lateral Cephalograms, Da Lee

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The purpose of this study was to compare the precision of lateral cephalometric Ricketts analysis measurements from NewTom 5G CBCT (NewTom) synthesized lateral cephalograms with Sirona Orthophos XG Plus (Sirona) digital lateral cephalograms. Materials & Methods: A Sirona digital lateral cephalogram and a NewTom synthesized lateral cephalogram of a phantom in the orthogonal and perspective projections were created. Metal washers in each plane of the phantom were measured in the vertical and horizontal dimensions and compared across the different imaging modalities. In Group 1, forty patients were randomly selected from the Loma Linda University Graduate Orthodontic Clinic who had …

Periodontal Health Of Anterior Teeth With Two Types Of Fixed Retainers, Andrew I. Corbett

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: Fixed retainers for anterior teeth have become a popular method for maintaining the position and function of teeth after orthodontic treatment. Various retainer designs, wire sizes and types have been used over the years. One problem with fixed retainers is that they complicate oral hygiene and therefore might negatively affect the periodontal tissues if left in place for long periods of time. Purpose: The purpose of this study is to compare the periodontal health of maxillary and mandibular anterior teeth retained with two different types of fixed retainers. Methods: Male and female subjects who had been in continuous orthodontic …

Photos And Silhouettes In Evaluating The Need For Bsso Surgery In Adult Females, Jessicah L. Moretz

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The objective of this study was to determine the anterior/posterior position of the mandible at which an orthodontist and oral surgeon would advise bilateral sagittal split osteotomy advancement or set back when evaluating adult female photos and silhouettes. Material & Methods: Fifty-one adult female profile photos and lateral cephalograms were collected. Subjects were selected who met three criteria: 1) ANB of 0-2, 2) balanced profile image, and 3) age greater than 18. The image and cephalometric tracing were morphed together to allow software simulation of mandibular prognathia and retrognathia in 2 mm increments. Orthodontists and oral surgeons evaluated morphed …

Changes In Pharyngeal Airway Dimensions Due To Mara Treatment In Class Ii Malocclusions, James K. Dillehay

Theses and Dissertations (ETD)

Orthodontic treatment effects on the pharyngeal airway have recently become a hot topic in the field of orthodontics. Current literature has shown facial skeletal morphology to be correlated with pharyngeal airway shape and volume. This study used CBCT imaging to identify what, if any, effects two different treatment modalities for correcting Class II malocclusions have on the pharyngeal airway volume. This retrospective study consisted of two groups of Class II patients: 38 patients (15 females, 23 males) treated with the MARA and an Edgewise appliance and 32 patients treated with an Edgewise appliance and Class II elastics. Both pre and …

Treatment Effects Of The Mandibular Anterior Repositioning Appliance (Mara) And Conventional Orthodontic Mechanics On Temporomandibular Joint Morphology: A Comparison Using Cone Beam Computed Tomography, Brenton E. Glassell

Theses and Dissertations (ETD)

Introduction: An ongoing debate exists in orthodontics about the amount of condylefossa remodeling and growth seen in Class II patients using functional appliance therapy. Some clinicians and researchers have found that that the use of functional appliances increases the amount of condylar growth and subsequent Class II skeletal correction; others believe that the mandible has a preset amount of growth and that conventional orthodontics will result in a similar amount of condylar growth to functional appliance therapy. Purpose: The aim of this study was to compare condylar remodeling in functional appliance treatment using the mandibular anterior repositioning appliance (MARA) to …

Premaxillary Characteristics In Complete Bilateral Cleft Lip And Palate: A Predictor For Treatment Outcome, Noha Ibrahim Abdelrahman Professor, Islam Tarek Hassan Professor

Dentistry

Objectives:

The aim of the current study was to investigate how bilateral cleft lip and palate (BCLP) cases responded differently to presurgical orthopedics (PSO) and primary lip repair (LR) based on premaxillary characteristics. We suggest a clinically oriented descriptive classification for BCLP based on premaxillary characteristics.

Design and Setting:

A retrospective longitudinal comparative study where available records of all non-syndromic patients with complete BCLP attending the Cleft Clinic, affiliated to the Oral and Maxillofacial Surgery department, Ain-Shams University, Cairo, Egypt were assessed.

Sample Population and Methodology:

Twenty-two cases were collected over a 4-years period from 2008 to 2011 (15 boys …