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Articles 1 - 12 of 12
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Thermal Properties Of Commonly Used Clear Aligner Systems As-Received And After Clinical Use, Louis Wenger
Thermal Properties Of Commonly Used Clear Aligner Systems As-Received And After Clinical Use, Louis Wenger
Master's Theses (2009 -)
Background/Objectives: The purpose of this study was to investigate the thermal properties, particularly glass transition temperature, of the polymers that are used to fabricate three different types of modern orthodontic aligners. Invisalign, (Align Technology, Inc, Santa Clara, CA, USA), Simpli5 (Allesee Orthodontic Appliances, Sturtevant, WI, USA), and ClearCorrect (ClearCorrect, Round Rock, TX, USA) were examined both as-received and after clinical use to determine if any differences were present both between and within aligners. Materials/Methods: Orthodontic aligners were collected from three different patients using the systems under investigation after two weeks of intraoral use. Duplicate, un-used samples were obtained from the …
Direct Visual Approximation Of Arch Length Discrepancy And Cephalometric Measurements, Bradley J. Wurm
Direct Visual Approximation Of Arch Length Discrepancy And Cephalometric Measurements, Bradley J. Wurm
Master's Theses (2009 -)
Introduction: Arch length discrepancy and cephalometric analysis are critical components of orthodontic treatment planning. Both have direct effects on the decision to extract teeth or not and treatment mechanics as well. Visual approximation is the most common method used to analyze arch length discrepancy among practitioners. Current trends show a decrease in the amount of orthodontists completing a cephalometric analysis. Previous studies have shown a tendency for orthodontists to overestimate the degree of crowding when visually approximating on dental casts. No previous study has assessed the ability to visually approximate cephalometric angle measurements. The purpose of this survey was to …
Effects Of Palatal Expansion On Speech Production, Jason Milton Meinhardt
Effects Of Palatal Expansion On Speech Production, Jason Milton Meinhardt
Master's Theses (2009 -)
Introduction: Rapid palatal expanders (RPEs) are a commonly used orthodontic adjunct for the treatment of posterior crossbites. RPEs are cemented to bilateral posterior teeth across the palate and thus may interfere with proper tongue movement and linguopalatal contact. The purpose of this study was to identify what specific role RPEs have on speech sound production for the child and early adolescent orthodontic patient. Materials and Methods: RPEs were treatment planned for patients seeking orthodontics at Marquette University. Speech recordings were made using a phonetically balanced reading passage (“The Caterpillar”) at 3 time points: 1) before RPE placement; 2) immediately after …
The Effect Of Heat Treatment On The Bending Properties Of A Cobalt-Chromium Orthodontic Wire, Alex Schwab
The Effect Of Heat Treatment On The Bending Properties Of A Cobalt-Chromium Orthodontic Wire, Alex Schwab
Master's Theses (2009 -)
Introduction: Elgiloy, a brand name of the original cobalt-chromium orthodontic wire, has been around for more than 50 years; yet despite this, little literature is available. Most of the literature on Elgiloy wires tends to evaluate the wires in tension. For these reasons, this study aimed to determine the bending properties of the four available tempers of Elgiloy wires and how heat treatment affects the wires’ bending properties. Materials and Methods: All four tempers of Elgiloy (red, yellow, green, and blue) were ordered in straight lengths containing 20 wires per pack that are each 0.018 inches in diameter and 14 …
Reliability Of Digital Dental Cast Measures As Compared To Cone-Beam Computed Tomography For Analyzing The Transverse Dimension, Brian Michel
Master's Theses (2009 -)
The purpose of this study was to assess the consistency in diagnosing the transverse dimension on cone-beam computed tomography (CBCT) images as compared to digital dental models. The study consisted of 11 patients with posterior crossbite at the level of the first molar and 17 patients with no crossbite at the level of the first molar. 13 patients were male and 15 patients were female with an overall mean age of 13.6 years. Eight linear measurements and two angular measurements were made on CBCT images of the patients and six linear measurements were made on the corresponding digital dental casts. …
Development Of Kinematic Templates For Automatic Pronunciation Assessment Using Acoustic-To-Articulatory Inversion, Deriq K. Jones
Development Of Kinematic Templates For Automatic Pronunciation Assessment Using Acoustic-To-Articulatory Inversion, Deriq K. Jones
Master's Theses (2009 -)
Computer-aided pronunciation training (CAPT) is a subcategory of computer-aided language learning (CALL) that deals with the correction of mispronunciation during language learning. For a CAPT system to be effective, it must provide useful and informative feedback that is comprehensive, qualitative, quantitative, and corrective. While the majority of modern systems address the first 3 aspects of feedback, most of these systems do not provide corrective feedback. As part of the National Science Foundation (NSF) funded study “RI: Small: Speaker Independent Acoustic-Articulator Inversion for Pronunciation Assessment”, the Marquette Speech and Swallowing Lab and Marquette Speech and Signal Processing Lab are conducting a …
Analysis Of Flexural Strength And Monotonic Load To Failure Following Simulated Chairside Adjustments And Repair In A Lithium Disilicate Glass-Ceramic, Ali Ramadhan
Master's Theses (2009 -)
Introduction: There are no studies regarding e.max Press that evaluate post-adjustment healing protocols and their effect on the load to failure in a clinically relevant test. It is essential to find the ultimate treatment protocol which will help clinicians preserve the physical properties of the ceramic restoration after adjustment. Material and Methods: The total number of samples used in this study was 440 IPS e.max press discs. The discs were 15 mm in diameter and 1 mm of thickness. The material was tested for flexural strength and monotonic load to failure. The test was done in two parts and with …
Comparison Of Anterior Denture Teeth Arrangements Made With The Tooth Mold Template And Definitive Computer-Aided Design & Computer-Aided Manufacturing Complete Removable Dental Prostheses, Jose Antonio Sierra
Comparison Of Anterior Denture Teeth Arrangements Made With The Tooth Mold Template And Definitive Computer-Aided Design & Computer-Aided Manufacturing Complete Removable Dental Prostheses, Jose Antonio Sierra
Master's Theses (2009 -)
Introduction: There is a dearth of information in the refereed literature regarding esthetics of CAD/CAM complete removable dental prostheses (CRDPs). The purpose of this study was to investigate and compare the anterior denture teeth arrangement made with the medium-size anterior tooth mold template to CAD/CAM complete removable dental prostheses fabricated with bonded denture teeth and milled teeth. Material and methods: Poly-vinyl siloxane impression were made of an edentulous maxillary model and selected for use as the patient template. The edentulous model was mounted on a semi-adjustable articulator. Definitive impressions and jaw relation records were made according to the manufacturer’s protocol. …
Speaker-Specific Adaptation Of Maeda Synthesis Parameters For Auditory Feedback, Joseph Vonderhaar
Speaker-Specific Adaptation Of Maeda Synthesis Parameters For Auditory Feedback, Joseph Vonderhaar
Master's Theses (2009 -)
The Real-time Articulatory Speech Synthesizer (RASS) is a research tool in the Marquette Speech and Swallowing lab that simultaneously collects acoustic and articulatory data from human participants. The system is used to study acoustic-to-articulatory inversion, articulatory-to-acoustic synthesis mapping, and the effects of real-time acoustic feedback. Electromagnetic Articulography (EMA) is utilized to collect position data via sensors placed in a subject’s mouth. These kinematic data are then converted into a set of synthesis parameters that controls an articulatory speech synthesizer, which in turn generates an acoustic waveform matching the associated kinematics. Independently from RASS, the synthesized acoustic waveform can be further …
Qmix 2in1 And Naoci Precipitate: Documentation, Identification, And Exothermic Reaction, Gordon L. Barkley Iii
Qmix 2in1 And Naoci Precipitate: Documentation, Identification, And Exothermic Reaction, Gordon L. Barkley Iii
Master's Theses (2009 -)
Introduction: The aim of this study was to document and identify precipitate formation and exothermic reaction caused when mixing NaOCl and QMiX. Methods: Photography captured time-dependent changes when mixing NaOCl and QMiX at; 0 seconds, 30 seconds, 1 minute, 30 minutes, 1 hour, and 24 hours. A differential scanning calorimeter (DSC) was utilized in determination of heat flow while analyzing temperature change (°C), enthalpy (mJ), and time (seconds) for NaOCl with QMiX and NaOCl with 2% chlorhexidine (CHX). 1H Nuclear Magnetic Resonance (NMR) and 2D NMR (DOSY) spectroscopy analyzed precipitation formed from NaOCl and QMiX. Results: Digital photography documented immediate, …
Survival Rates Of Primary Endodontic Therapy Following Core/Post And Crown Placement, Kandace Yee
Survival Rates Of Primary Endodontic Therapy Following Core/Post And Crown Placement, Kandace Yee
Master's Theses (2009 -)
Introduction: The objective of this study was to determine if a correlation exists between the time to core or post and core (core/post) placement following non-surgical root canal therapy (NS RCT), the time to crown placement following core/post placement, and the incidence of an untoward event. Materials and Methods: Utilizing the Delta Dental of Wisconsin Insurance Database, information was analyzed from 476,479 initial NS RCT procedures. Of these teeth, 160,040 had a core/post and a crown placed before the end of the continuous coverage period or occurrence of an untoward event. Untoward events were defined as having a retreatment, apicoectomy, …
Viability Of Human Periodontal Ligament Fibroblasts After Time In Tooth Storage Media, Scott Macdonald
Viability Of Human Periodontal Ligament Fibroblasts After Time In Tooth Storage Media, Scott Macdonald
Master's Theses (2009 -)
Periodontal ligament cell viability at the time of tooth replantation is of utmost importance for proper repair of the damaged tissues (1). Multiple different options are currently available for storage of an avulsed tooth. The goal of this study was to investigate new storage media and evaluate their ability to maintain cell viability over time. Materials and Methods: Cultured human periodontal ligament fibroblasts (hPDLF) were seeded on 96-well plates. These cells were exposed to different storage media including: Hank’s Balanced Salt Solution (HBSS), EMT Toothsaver (EMT), Save-A-Tooth (SAT), trehalose (T300), cell culture media, water, and different formulations of HBSS combined …