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The Effectiveness Of Resin-Modified Glass Ionomer Varnish In Preventing White Spot Lesions During Fixed Appliance Orthodontic Therapy: An In Vitro Study, Bradley Herman

Theses & Dissertations

The purpose of this investigation was to evaluate the efficacy of a glass ionomer varnish in preventing demineralization of enamel adjacent to and some distance away from an orthodontic bracket. Forty extracted human molars were divided into four different treatment groups (varnish in distilled water, varnish in acetic acid, enamel in acetic acid, and enamel in distilled water). Two 3 x 3 mm graphite windows were drawn on the tooth, one adjacent to the bracket and one 3 mm away from the first window, indicating the scanning area. Varnish was applied to the teeth in the varnish groups and all …

The Effect Of Pigmentation On Thermoplastic And Thermoset Elastomeric Power Chain, William Taylor

Electronic Thesis and Dissertation Repository

Aim: The purpose of the study was to determine the effect of pigmentation on force levels and their degradation over time in orthodontic power chain of different chain types and manufactures.

Materials & Methods: Groups consisted of closed power chain from American Orthodontic (AO) thermoplastic (TP) in 5 colors, AO thermoset (TS) in 2 colors, Ormco TP in 4 colors, Ormco TS in 2 colors, and Rocky Mountain Orthodontics (RMO) TS in 5 colors (18 groups total, 10 chain samples in each group). Testing was performed over a period of 6 weeks at intervals of initial (T0), 1 hour (T1), …

Effect Of Heat-Treatment Time On Bending Properties Of Cobolt-Chromium Orthodontic Wires, Melanie Hammerbeck

Master's Theses (2009 -)

Different protocols appear in the literature with respect to heat-treating cobalt-chromium orthodontic wires. The objective was to determine the effect of variable heat-treatment time and method on the bending properties of CoCr wires. Two tempers of CoCr ‘Elgiloy’ wires (Rocky Mountain Orthodontics), blue (B) and yellow (Y), were heat-treated for different durations. The groups (n=20/group/temper) included: 1) as-received (control); 2) brush-flame; 3) 480oC for 5sec; 4) 480oC for 10min; 5) 480oC for 2hr; and 6) 480oC for 5hr. Wire segments were tested by a three-point bend test. Stiffness/flexural modulus, percent recovery, and force values at select deflections were statistically compared …

Efficacy Of Invisalign Attachments: A Retrospective Study, Theresa Karras

Master's Theses (2009 -)

Objective: To compare the efficacy of Invisalign’s (Align Technology, Inc., Santa Clara, CA) optimized and conventional attachments on rotational and extrusive tooth movements.Materials and Methods: Initial, predicted, and achieved digital dental models from 100 orthodontic patients were exported from Invisalign’s ClinCheck software as stereolithography (STL) files and subsequently imported into the Slicer CMF program (open source, version 4.7.0) for superimpositions on posterior teeth with no planned movement. Rotational and extrusive measurements for both optimized and conventional attachment types were made on 382 teeth from the superimposition of the initial and predicted models (“predicted movement”) and from the superimposed initial and …

Microleakage - The Main Culprit In Bracket Bond Failure?, Ioana Roxana Bordea, Adina Sîrbu, Ondine Lucaciu, Aranka Ilea, Radu Septimiu Câmpian, Doina Adina Todea, Teodora Gabriela Alexescu, Maria Aluaș, Corina Budin, Andreea Simona Pop

Journal of Mind and Medical Sciences

Microleakage is the most common cause of bracket debonding. Moreover, different thermal expansion coefficients between the enamel, the adhesive, and the bracket bases will cause repeated expansion and contraction, adding more stress to the bonding strength. Debonding represents the failure of the adhesion between the brackets and the tooth enamel. The debonding of brackets from the enamel surface is the result of several factors, such as acid-etching and drying, adhesive application, and the time and type of photo activation. The under polymerization process of composite photo activation may lead to early bracket debonding. Objective. The aim of this research …

Correlation Of Body Mass Index Percentile And Craniofacial Morphology: A Retrospective, Cross-Sectional Study, Adam G. Danze

Student Theses, Dissertations and Capstones

Introduction: Obesity rates are rising exponentially in many countries around the world, particularly in the United States. This epidemic is affecting people of all ages, and little to no progress has been made it slow it down. Lack of physical activity and increased consumption of energy rich foods and caloric intake have been recognized as contributing factors for the concerning increase in the prevalence of obesity in child and adult populations. The high prevalence of obesity is believed to be a complex interplay of genetic, environmental, socioeconomic, cultural, and psychological factors. Childhood obesity is occurring at progressively younger ages, leading …

The Relationship Of Parent-Reported Symptoms Of Sleep-Disordered Breathing With The Presence Of Malocclusion And Craniofacial Disharmony In Pediatric Orthodontic Patients, Astin Barnes

Student Theses, Dissertations and Capstones

Introduction: Sleep-disordered breathing (SDB) is a term for breathing difficulties occurring during sleep and encompasses frequent loud snoring to Obstructive Sleep Apnea (OSA). SDB in children has been linked to daytime sleepiness, poor school performance, hyperactivity, cardiovascular complications, impaired overall growth, development of malocclusion, and craniofacial disharmony. The American Academy of Pediatrics and the American Association of Orthodontists (AAO) urge more studies to educate about etiology, symptoms, and sequelae of SDB. Therefore, this study proposed to investigate the association between symptoms of SDB and malocclusion and craniofacial disharmony in children. Methods: The Pediatric Sleep Questionnaire (PSQ) was used to obtain …

Early Condylectomy: Biological Considerations, Diego Fernando López, Juliana Ruiz Botero, Luis Eduardo Almeida

School of Dentistry Faculty Research and Publications

Objective: To describe the early treatment of two patients with unilateral condylar hyperplasia (UCH) diagnosis and therapeutic surgical protocol (early condylectomy) supported by the current biological knowledge about the development and repair of mandibular condyle cartilage (MCC). Methods: Review of the literature and two case description of the treatment. The two patients were girls, 12 and 13 year old. The follow up period was of 3 years. SPECT diagnostic, radiographic, photographic and tomographic images are presented. Results: The literature summarized provides biological basis favoring the early treatment of UCH. The two cases were treated with the same surgical protocol obtaining …

Comparison Of Patient Factors Influencing The Selection Of An Orthodontist, General Dentist, Or Direct-To-Consumer Aligners For Orthodontic Treatment, Jeffrey C. Olson

Theses and Dissertations

Purpose: To evaluate the factors that influence potential orthodontic patients choosing between an orthodontist, general dentist, and direct-to-consumer (DTC) aligners for their treatment, and to determine the demand for each provider type.

Methods: An electronic survey was administered to 250 individuals among the general population of adults in the United States. Questions were designed to determine the respondent’s level of interest in pursuing orthodontic treatment with each provider type, evaluate their current level of knowledge concerning provider options, and identify factors influencing their selection. Pearson’s chi-squared test and ANOVA were used to evaluate the factors influencing patients in …

Temporomandibular Joint Function After Orthognathic Surgery, Aikaterini Kleopatra Aslanidou

All ETDs from UAB

Orthognathic surgery has 3 basic goals: function, esthetics and stability. The relationship between orthognathic surgery and temporomandibular joint function remains highly controversial. Regarding the functional changes and range of mandibular movements after surgery, mandibular hypomobility and other signs and symptoms of joint dysfunction are associated with orthognathic surgery in the literature. The aim of this study is to evaluate the function of the temporomandibular joints at lest 6 months after orthognathic surgery and compare them with non-surgical subjects. The null hypothesis is that there is no difference in subjective symptoms reported by the subjects and clinical evaluation of the range …

Wear Of Orthodontic Bite Turbos And Opposing Enamel, Kyle Feagin

All ETDs from UAB

Orthodontic bite turbos are used to separate the maxillary and mandibular arches when disocclusion is needed for facial placement of orthodontic brackets or extrusion of teeth. The bite turbo should have adequate wear resistance to maintain the disocclusion but also avoid abrasion of the opposing enamel. The objective of this study was to measure the wear and opposing enamel wear of three materials used as bite turbos. 8 specimens (10x8x4 mm) each of Transbond LR (3M), Transbond Plus (3M) and Triad gel (Dentsply) were prepared in silicone molds and light cured for 30 seconds using an Acteon Satelec Blue Ray …

Review Of Literatures: Importance Of Vitamin D In Dentistry, Wareeratn Chengprapakorn

Chulalongkorn University Dental Journal

This article is aimed to review of literatures on vitamin D roles in overall health and its effects in dentistry, particularly, periodontal disease, orthodontics tooth movement, dental implant osseointegration and also osteonecrosis of the jaw. On account of new insights of vitamin D implication in immune response. This article will also focus on vitamin D effects on oral response to various dental procedures.