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Dissertations / Theses on the topic 'Orthodontics and Orthodontology'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Porter, Jason L. "Comparison of intraoral and extraoral scanners on the accuracy of digital model articulation." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4881.

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Introduction: Orthodontists increasingly rely on digital models in clinical practice. The ability of modern scanners to articulate digital models must be scientifically evaluated. Methods:Twenty five digital articulated models were produced from four digital scanners in five experimental groups. The resulting inter-arch measurements were compared to the gold standard. An acceptable range of 0.5mm more or less than the gold standard was used for evaluation. Results: iTero® and iTero® Element yielded all acceptable inter-arch measurements. The 3M™ True Definition and Ortho Insight 3D® with Regis
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2

Poss, Jordan Lee. "Interarch tooth-size discrepancies in patients with normal occlusions." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2610.

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Objective: The purpose of this study was to use the University of Iowa Meredith Growth Study to limit selection bias in selecting subjects to determine interarch tooth-size discrepancies (ITSD) by measuring and comparing the mesiodistal widths of maxillary and mandibular teeth. Methods: Thirty-two males and twenty-four females were selected from the Iowa Growth Study. They were selected on the basis of normal occlusions which were defined as Class I molars with mild (<2mm crowding/spacing) or moderate (2-4mm crowding/spacing)
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3

Bonner, Laura Lynn. "Sexual dimorphism in symphyseal rigidity: a longitudinal study." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2443.

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Objective: The purpose of this study to assess the relationship between masticatory function and symphyseal biomechanical properties using a longitudinal sample. Known differences in male and female maximum bite forces manifest during adolescence. If symphyseal bending rigidity is affected by function during ontongeny, we would expect variation in male and female growth allometries of certain biomechanical properties of the symphysis. Methods and Materials: Subjects were chosen from the Iowa Growth Study records for comple
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4

Bilbo, Eve Erin. "Long-term skeletal effects of high-pull headgear plus fixed appliances: a cephalometric study." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4578.

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5

Swenson, Brendon James. "Interproximal tooth wear: an in vitro pilot study." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2641.

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Objective: The purpose of this study was to develop a method of accurately quantifying the wear facet, and relating the wear facet size to the forces applied by the Iowa Tooth Wear Machine. Methods: Ten un-erupted third molars were used for this study. The teeth were mounted in the Iowa Tooth Wear Machine with opposing proximal surfaces. Samples were run with a 0.250mm stroke length for 645,120 cycles under 5 pounds of weight. An optical scanner was used to digitize the initial and final interproximal wear facets. AnSur© software
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6

Howe, Sara Christine. "Phenotypic characterization of Class II malocclusion." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/2896.

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Background: Genes predispose to disproportionate growth of the human face resulting in unbalanced maxillo-mandibular relationships and severe malocclusion. The success of genetic studies aimed at identifying causative genes for complex traits such as malocclusion depends greatly on a well-characterized phenotype to reduce heterogeneity. Purpose: The purpose of this study is to characterize the skeletal and dental variation present in Class II malocclusion into distinct homogenous phenotypic groups to help empower future genetic studie
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7

Ray, Alison. "Phenotypic characterization of class II malocclusion using two dimensional photographic measurements." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2614.

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Purpose: The purpose of this study is to characterize class II malocclusion phenotypes from orthodontic photographs in an effort to understand variation in the vertical and transverse dimension from the frontal view and also to identify distinct subgroups of homogenous phenotypes that could be correlated to genetic variation in an effort to identify the genetic causes of class II malocclusion phenotypes. Materials and Methods: The study sample included adult class II patients who were seeking treatment at the University of Iowa Orthodontic Graduate Clinic, University of Iowa Hospital Dentistry
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8

McManus, Michelle Marie. "Effect of mini-screw maximum insertion torque on skeletal orthodontic anchorage." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/552.

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Objective: The primary objective of this study was to examine the effect that maximum insertion torque has on force resistance and stability of titanium screws in cadaver maxillae and mandibles. Materials and Methods: Forty-eight cadaver maxillary and mandibular jaw quadrants were obtained Two titanium mini-screws were placed in each jaw quadrant and maximum insertion torque was measured. Each mini-screw was subjected to tangential force application oriented perpendicular to placement of the mini-screw and parallel to the occlusal plane. The force applied at each deflection was measured up to
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9

Pappas, Nicholas Harry Barr. "Expanding the occlusal phenotype of non-syndromic orofacial clefting." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6243.

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Introduction: Patients with oral clefts can present with variable occlusal anomalies often thought to be a result of surgical intervention, which makes it difficult to characterize the occlusal phenotypic spectrum of orofacial clefting. Little research has been performed on the prevalence of occlusal anomalies and whether the prevalence of these anomalies is elevated in unaffected relatives of individuals with overt oral clefts. To date, this study is the largest international collection of children with non-syndromic clefts, their relatives and controls that aim to characterize the spectrum o
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10

Smith, Nicholas Rindels. "Interproximal tooth wear: an in vivo pilot study." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1084.

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The purpose of this pilot study was to develop a method to quantify the surface area of interproximal wear facets present in the human dentition. Another aim was to investigate the reliability of this method and possible correlations between the amount of interproximal tooth wear and vertical craniofacial morphology. The study was carried out on 24 adolescent individuals immediately prior to orthodontic treatment. Following interproximal contact separation of one week, interproximal impressions were taken with polyvinyl siloxane and a positive stone model was fabricated with type IV dental sto
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11

Jham, Andre Correia. "The efficacy of Novamin powered technology Oravive and TopexRenew, Crest and Prevident 5000 Plus in preventing enamel demineralization and white spot lesion formation." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/522.

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Objective: The purpose of this study was to compare in vitro the effectiveness of Novamin powered technology Oravive and TopexRenew, with Crest and Colgate's PreviDent 5000 Plus in decreasing demineralization and preventing white spot lesion formation on extracted human teeth. Materials and Methods: Eighty-two extracted non-carious human third molar teeth without observable white-spot lesions, decalcification, or dental fluorosis were used for this in vitro study. The teeth in the study were suspended in their respective treatment slurry and cycled through remineralization and demineralization
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12

Clark, Tanner Jay. "The efficacy of ProSeal™, SeLECT Defense™, OrthoCoat™, and Biscover LV™ resin sealants on the prevention of enamel demineralization and white spot lesion formation." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/479.

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The purpose of this study was to compare, in vitro, the effectiveness of the resin sealants ProSeal™, OrthoCoat™, SeLECT Defense™, and Biscover LV™ on the inhibition of enamel demineralization after being subjected to extensive mechanical toothbrush abrasion. Seventy-five extracted third molars were divided into five groups - control, ProSeal, SeLECT Defense, OrthoCoat, and Biscover LV. All of the teeth, with the exception of the control group, weretreated with one of the four sealant materials per the manufacturer's instructions. Teeth were mounted in an acrylic ring and stabilized with a vin
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13

Blackburn, James. "IN-VITRO ASSESSMENT OF A NOVEL BRACKET'S EFFECT ON RESISTANCE TO SLIDING." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3722.

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Friction, binding and notching are the factors that contribute to resistance to sliding during orthodontic tooth movement. However, most attempts at reducing resistance aim only to reduce the archwire/ligature friction. In this study, a novel bracket with a unique design aimed to reduce all three components of resistance to sliding. Four types of brackets (passive and active self-ligating, traditionally ligated and the novel bracket, (n=5, each) were tested at 0, 2, 4, 6, and 8ᵒ of tip on a 0.019 x 0.025”archwire. The resistance to sliding values were recorded. At 0ᵒ, the passive self-ligating
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14

Wees, Julie Marie. "Short lower anterior face height: phenotypic diversity." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1795.

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Introduction: Individuals with short lower anterior facial height (LAFH), reduced mandibular plane angle, and excessive overbite resulting from upward and forward mandibular rotation are traditionally classified as skeletal deep bites. Our purpose was to explore phenotypic variation within short LAFH individuals using geometric morphometric methods. Methods: Cephalograms of 101 individuals (64 female, 37 male; age range: 7-62 years) with LAFH to total anterior facial height (TAFH), ratio (LAFH/TAFH), at or below 52.6% were studied. Principal component analysis, cluster analysis, and canonical
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15

Schmitt, Terry Jay. "An In vitro comparative study of intrabracket width as it relates to torque between three different archwires." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/3183.

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Orthodontic materials are evolving. The aim was to find out how this affects treatment outcomes. Brackets are getting smaller and smaller in the name of esthetics and patient comfort. The aim of this study was to find out if intrabracket width (the horizontal distance between bracket tie wings) had any effect on maxillary anterior root torque. We also aimed to find out if three common orthodontic archwires were capable of delivering the torque necessary to achieve ideal root torque. A machine was developed to simulate lingual root torque of an upper central incisor. This is the first test of i
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16

Hartman, Christopher Henry. "Nasal septal deviation and craniofacial asymmetries." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1620.

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Introduction: Nasal septal deviation may contribute to facial asymmetry. The purpose of this study was to assess the relationship between nasal septal deviation and facial asymmetry using three-dimensional geometric morphometric methods. Methods: Computed tomographic scans were made of n=55 adult subjects, and septal deviation was calculated as a percentage of septal volume relative to the volume of a modeled non-deviated septum. Skeletal landmarks representing nasal, palatal, and lateral facial regions were recorded, and landmark data was superimposed using Procrustes analysis. ANOVA/MANOVA t
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17

Trockel, Christopher. "Assessment of the role that second molars play in bite-opening during orthodontic treatment in adolescents : a retrospective, cephalometric study." Thesis, NSUWorks, 2013. https://nsuworks.nova.edu/hpd_cdm_stuetd/46.

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A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry. Abstract ASSESSMENT OF THE ROLE THAT SECOND MOLARS PLAY IN BITE-OPENING DURING ORTHODONTIC TREATMENT IN ADOLESCENTS: A RETROSPECTIVE, CEPHALOMETRIC STUDY DEGREE DATE: DECEMBER 6, 2013 Christopher B. Trockel, D.D.S. COLLEGE OF DENTAL MEDICINE NOVA SOUTHEASTERN UNIVERSITY Thesis Directed By: Shiva Khatami D.D.S., Ph.D, Committee Chair Mark Hall, D.D.S., Committee Member Abraham Lifshitz, Committee Member Objectives: This study aimed to investigate the role that se
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18

Feldon, Paul. "Diode laser debonding of ceramic brackets." Thesis, NSUWorks, 2008. https://nsuworks.nova.edu/hpd_cdm_stuetd/39.

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19

McHenry, Kory. "Comparison of human and bovine teeth for enamel adhesion testing." Thesis, NSUWorks, 2008. https://nsuworks.nova.edu/hpd_cdm_stuetd/38.

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20

Adusumilli, Prathima. "Analysis of intermolar, intercuspid ratios and facial heights in different malocclusions." Thesis, NSUWorks, 2010. https://nsuworks.nova.edu/hpd_cdm_stuetd/36.

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21

Fuller, Jessica Kay. "Maxillary central incisor crown-root relationships in class I normal occlusions and class III open and deep malocclusions." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1599.

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MAXILLARY CENTRAL INCISOR CROWN-ROOT RELATIONSHIPS IN CLASS I NORMAL OCCLUSIONS AND CLASS III OPEN AND DEEP MALOCCLUSIONS By Jessica Fuller M.S. Thesis Research Project Introduction: The purposes of this thesis were several: (1) to examine a new crown-to-root angle based on anatomic points, the labial crown-root angle (LCRA), that was proposed in a recent University of Iowa thesis by Bauer, T.J. (2014) and correlate it with the collum angle (CA) values for Class I normal occlusions and Class III malocclusions; (2) to establish mean values for CA and LCRA for Class I normal occlusions and Class
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22

Ricci, Alyssa G. "THE EFFICACY OF A FLUORIDE-CONTAINING ORTHODONTIC PRIMER IN PREVENTING DEMINERALIZATION." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5789.

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Purpose: To evaluate the efficacy of a fluoride-containing orthodontic primer in preventing demineralization adjacent to brackets and compare the quality of enamel on tooth surfaces that received interproximal reduction (IPR). Methods: Patients at the VCU Orthodontic clinic who consented to orthodontic treatment involving extraction of at least 2 premolars were recruited to this pilot clinical study. Brackets were bonded to premolars using one of two primers, fluoride-containing experimental or control. IPR was also performed, and the experimental primer was applied to randomly selected teeth.
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23

Wire, Clint. "Mini-screw assisted RME vs. traditional RME to more successfully achieve mid-palatal sutural separation." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6886.

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Introduction: Treating adolescent maxillary constriction often includes a traditional RME appliance, with the aim of creating a separation of the midpalatal sutural (MPS). However, maxillary skeletal expansion becomes more difficult with age due to increased facial and mid-palatal, skeletal resistance. An emerging treatment option with the hopes of overcoming this skeletal resistance is a mini-screw assisted RME appliance. The purpose of this study is to evaluate the age and maturation at which successful separation of the maxillary MPS can be achieved, and whether or not this can be improved
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24

Phillips, Joseph, and James Chen. "PATIENT AND PARENT PERCEPTIONS ON OUTCOMES IN EARLY ORTHODONTIC TREATMENT." Scholarly Commons, 2020. https://scholarlycommons.pacific.edu/dugoni_etd/3.

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Introduction: Orthodontics has clinical benefits, however, the psychosocial outcomes are not well understood. These soft benefits are often classified as aesthetic, functional, and psychosocial, however, there is limited work understanding these outcomes as reported directly from the patient. By better understanding the patient’s perspectives, we can continually refine our clinical model to be patient-centric and more appropriately manage the patient’s expectations and experiences. Materials and Methods: This is a cross-sectional qualitative study of 20 parents of 24 children ages 8-11 year
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Sandretti, Matthew A., Bhavna Shroff, Steven J. Lindauer, and Al M. Best. "Restoring Lateral Incisors and Orthodontic Treatment: Perceptions among General Dentists and Othodontists." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3727.

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The purpose of this study was to identify and compare preferences and perceptions of orthodontists and general dentists when restoring peg-shaped lateral incisors. The investigation sought to summarize these preferences with regard to treatment planning, tooth preparation and interdisciplinary communication. A pair of mailed and electronic surveys was distributed to 1,500 general dentists and orthodontists, respectively. The results indicated that general dentists perceived that general dentists held the primary decision-making responsibility, while orthodontists disagreed (P<0.0001). Orthodon
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Best, Alexandra D. "Comparison of treatment management between orthodontists and general practitioners performing clear aligner therapy." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4158.

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The purpose of this study was to investigate differences in case confidence, treatment management, and Invisalign® expertise between orthodontists and general dentists. A survey was mailed to 1,000 randomly selected orthodontists and general dentists, respectively, who are Invisalign® providers, and results were analyzed. The results indicated that orthodontists treated significantly more Invisalign® cases and received more Invisalign® training than general dentists (P
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27

Hoelscher, Benjamin Charles. "Passive eruption patterns in first molars." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/982.

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OBJECTIVE: The purpose of this study is to determine the eruption patterns of maxillary and mandibular first molars from the first occlusal contacts to adulthood. Previous studies have failed to obtain measurements into adulthood or have not been longitudinal in design. By using a measurement during the subjects' adulthood, a better estimate of the changes that occur between the tooth and the gingival margin throughout growth and aging can be obtained. METHODS: The material for this research project was obtained from the Meredith Facial Growth Study from the University of Iowa Orthodontics Dep
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Clark, Sarah Elizabeth. "Remineralization effectiveness of MI Paste Plus - a clinical pilot study." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/939.

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Purpose: The purpose of this study is to evaluate the effectiveness of MI Paste Plus™ in increasing remineralization and improving the esthetic appearance of white spot lesions in patients who have been treated with fixed orthodontic appliances. Material and Methods: A total of twelve subject participants aged twelve to twenty years were selected in this pilot study. The six treatment group subjects were treated with MI Paste PlusTM every three weeks in-office (4 applications) and via invisible retainer every night for a total of 12 weeks. The in-office application consisted of a 1 minute 35%
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Noll, Daniel A. "Twitter analysis of the orthodontic patient experience with braces versus Invisalign." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4156.

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The purpose of this study was to examine the orthodontic patient experience with braces compared to Invisalign® by means of a large-scale Twitter sentiment analysis. A custom data collection program was created to collect tweets containing the words “braces” or “Invisalign.” A hierarchal Naïve Bayes sentiment classifier was developed to sort the tweets into one of five categories: positive, negative, neutral, advertisement, or not applicable. Among the 419,363 tweets applicable to orthodontics collected, users posted significantly more positive tweets (61%) than negative tweets (39%) (p-value
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30

Borget, Gisela Lilian. "Variation in arch shape and dynamics of shape change from infancy to early childhood." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5421.

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Introduction: In order to properly diagnose and treatment plan, an orthodontist needs to be knowledgeable about the changes that occur to the maxillary and mandibular dental arches throughout growth. The purpose of this study is to provide an analysis of morphological shape differences seen in the maxillary and mandibular dental arches individually, as well as together, from birth to 3 years of age. Methods: Dental casts from the Iowa Infant Growth study ranging from 2 months to age 4 were photographed in the occlusal plane. The images were landmarked with 3 standard landmarks and 10 sliding s
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31

Kadavy, Kevan Daniel. "A longitudinal study of the relationship between childhood BMI and timing of dental development." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5529.

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Introduction: Prevalence of childhood obesity is at an all-time high. The effect of childhood obesity on dental development and eruption is a widespread topic today in the dental field. Several cross-sectional studies over the past decade have found an association between advanced dental development and eruption and childhood obesity. The purpose of this study is to examine the longitudinal relationship between childhood Body Mass Index (BMI), and the development of the permanent dentition. Methods: 76 subjects from a longitudinal dataset (Iowa Facial Growth Study 1946-1960) were selected to e
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32

Prestwich, Tyler Carl. "Factors influencing the outcomes of class II camouflage treatment." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4725.

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Class II malocclusion in non-growing individuals is treated in one of two ways - masking or surgery. If the dentoskeletal discrepancy is great enough, masking usually involves extraction of two maxillary premolars and subsequent incisor retraction and closure of overjet. This is the option of choice for patients without profile concerns, or who have medical or financial concerns. However, this treatment modality can sometimes result in less-than-ideal results. In the present study, we sought to understand what factors may influence the outcomes of this type of treatment. 65 subjects were inclu
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33

Eliason, Joseph, and Steven J. Lindauer. "Crown size comparisons in patients with unilateral palatally displaced canines." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3726.

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Abstract CROWN SIZE COMPARISONS IN PATIENTS WITH PALATALLY DISPLACED CANINES By Joseph L. Eliason, D.D.S. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University. Virginia Commonwealth University, 2015 Thesis Director: Steven J. Lindauer, D.M.D., M.Dent.Sc. Professor and Chair, Department of Orthodontics There has been significant debate over the past decades regarding the etiology of palatally displaced canines. Theorized risk factors include agenesis or malformation of the lateral incisors, incisor
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34

Buelow, Dwight Van. "Measurement of Forces and Moments in Three-Dimensional Archwires." VCU Scholars Compass, 2003. http://scholarscompass.vcu.edu/etd/783.

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AbstractMEASUREMENT OF FORCES AND MOMENTS IN THREE-DIMENSIONAL ARCHWIRESBy Dwight V. Buelow, D.D.S.A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: Steven J. Lindauer, D.M.D., M.D.Sc.Chairman and Professor, Department of OrthodonticsOrthodontic tooth movement occurs in response to the application of controlled mechanical force systems. The purpose of this study was to improve understanding of those force systems by evaluating differences between the resul
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Olson, Jeffrey C. "Comparison of Patient Factors Influencing the Selection of an Orthodontist, General Dentist, or Direct-To-Consumer Aligners for Orthodontic Treatment." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5766.

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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 influenci
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36

Ghaffari, Ashkan. "Treatment Outcomes and Retention in Medicaid and non-Medicaid Orthodontic Patients." VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/1520.

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Medicaid orthodontic patients have been shown to miss more appointments and break more appliances than self-pay patients, indicating a greater tendency toward non-compliance. Lack of compliance during the post-treatment phase can be detrimental to retention. The purpose of this study was to determine whether there is a difference in PAR score changes between Medicaid and non-Medicaid patients during and after orthodontic treatment. PAR scores were determined using study models of 43 Medicaid and 39 non-Medicaid patients before and at the end of active treatment, and 24 Medicaid and 42 non-M
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37

Lindsey, David H. "Orthodontists' and Parents' Perspective of Occlusion in Varying Anterior-Posterior Positions: A Comparative Study." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4758.

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Objective: The purpose was to compare orthodontists’ and parents’ perception of orthodontic treatment outcomes in the anterior-posterior (AP) dimension. Assessment of treatment time and compliance were also investigated. Material and Methods: Parallel surveys for orthodontists (n=1000) and parents (n=750) displayed occlusions from 3 mm Class III (Cl III:3) to 3 mm Class II. Participants rated occlusal relationships on a 100 mm VAS from least to most acceptable (0-100). Results: 233 orthodontists (23%) and 243 parents (32%) responded. Orthodontists (mean=93.9, 25.9) and parents (mean=80.7,
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38

Stewart, Daniel. "Bonding Orthodontic Brackets to Stainless Steel Crowns." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1695.

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The purpose of this study was to compare shear bond strengths of brackets bonded to stainless steel crowns using various orthodontic adhesives and surface conditioning techniques. One hundred and twenty mandibular first molar stainless steel crowns were randomly divided into groups: (1): Aluminablasting + Metal Primer + Assure; (2): Aluminablasting + Silane Coupling Agent + Transbond; (3): Diamond Bur Abrasion + Metal Primer + Assure; (4): Diamond Bur Abrasion + Silane Coupling Agent + Transbond; (5: control): Acid Etching + Metal Primer + Assure; (6: control): Acid Etching + Silane Coupling A
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39

Moylan, Heather. "Accuracy of a smartphone-based orthodontic treatment monitoring application." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5393.

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Objectives: Dental Monitoring® (“DM,” Dental Monitoring, Paris, France), is a cloud-based software that allows orthodontists to track patients’ treatment remotely. The purpose of this study was to investigate the accuracy of the software in making linear measurements. Methods: Patients took intraoral photographs using the DM application, immediately followed by impressions for plaster models. Intercanine and intermolar width and arch depth measurements were made by DM and compared to measurements made on the plaster models. Data was analyzed using two one-sided t-tests for equivalence with equ
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40

Gladwell, Jason Thomas. "Concurrent Whitening and Orthodontic Treatment." VCU Scholars Compass, 2007. http://scholarscompass.vcu.edu/etd/1469.

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The aim was to evaluate whether a whitening system, when used during the final stages of orthodontics, would yield results comparable to whitening alone. Patients were assigned to either the control (n=20) or experimental (n=26) groups. At T1, patients were given a ten day supply of Trèswhite™ by Opalescence®, instructions on use, and initial shade determination was made and photographs were taken. At T2 and T3, shade determination was accomplished and updated photographs were taken. Whitening of the teeth occurred in both groups on average, but significantly more whitening was experie
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41

Welk, Thomas Paul. "A candidate gene approach to assessing phenotype/genotype associations in the nasal complex." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6878.

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Introduction: The nasal septum, a component of the chondrocranium, acts as a growth center that may have a morphogenetic influence on adjacent intramembranous-derived structures of the nasofacial complex. Recent evidence has demonstrated that morphological variation in the nasofacial complex is potentially due to early developmental variation in chondrocranial-derived nasal structures. There are likely both local and systemic factors that affect inter-population nasal variation. If the morphology of the nasal complex is driven, at least in part, by the morphogenetic effects of cartilage during
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Horsley, Bryan P. "Appointment Keeping Behavior of Medicaid vs. Non-Medicaid Orthodontic Patients." VCU Scholars Compass, 2004. http://scholarscompass.vcu.edu/etd/1521.

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State Medicaid programs were established to care for the poor by eliminating financial barriers and increasing their ability to be treated within the mainstream of the heath care system. The number of children eligible for Medicaid services is increasing, yet the number of Medicaid providers remains low. Health care providers cite failed appointments as being a major problem with Medicaid patients and one of the largest deterrents to participating. The purpose of this study was to determine whether a difference in appointment keeping behavior exists between Medicaid and non-Medicaid orthodo
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Lu, Hung Quoc. "Lip profile preferences of Asian Americans." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2179.

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The aim of this study was to evaluate how Asians, non-Asians, and orthodontists in America view esthetic soft tissue Asian lip profiles. The null hypothesis was that there was no difference in the perception of lip profile esthetics of Asian patients between Asian laypersons, non-Asians laypersons, and orthodontists. A survey was constructed using the profile photographs of one adult male and one adult female Asian American patient taken from the VCU Orthodontics Clinic records. Using Dolphin Imaging 3D, the original photographs were digitally altered. The lips in each photograph were moved in
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Real, Figueroa Sergio Enrique. "Accuracy of Slot Dimension within Sets of Orthodontic Buccal Tubes." Thesis, NSUWorks, 2017. https://nsuworks.nova.edu/hpd_cdm_stuetd/73.

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Objective: This study aims to evaluate the dimensional precision of orthodontic buccal tubes slots from different orthodontic companies using the Scanning Electron Microscope (SEM). Methods: Four of the most popular orthodontic companies within the US who manufacture and distribute molar tubes to orthodontists were selected for this study including Opal (Ultradent), Ormco(Damon), American Orthodontics and 3M Unitek. Each company was asked to send 20 molar tubes, 022 slot (.0225 x .0285 inches), which have been manufactured within the past 2 months to be used in this study. We measured the accu
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Poole, Morris. "Efficacy of Orthodontic Bonding Agents in Preventing Demineralization Around Brackets." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2178.

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Enamel demineralization is a concern in orthodontic patients with poor oral hygiene. To curtail this problem, amorphous calcium phosphate (ACP) containing adhesives have been developed. The purpose of this in vitro study was to evaluate the cariostatic potential of an ACP containing orthodontic bonding agent adjacent to brackets. Sixty human molars were randomly distributed into: ACP adhesive, resin modified glass ionomer cement (RMGIC), and conventional composite resin groups (N=20 each). Brackets were bonded following the manufacturer’s instructions. Tooth enamel through a 2mm window ar
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Prettyman, Chase. "Self-Ligating vs. Conventional Brackets as Perceived by Orthodontists." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2183.

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Introduction: Within the past decade, significant developments, new designs, and numerous proposed advantages of self-ligating (SL) brackets have caused them to gain great popularity among practicing orthodontists. The purpose of this study was to determine if there are significant clinical differences between SL and conventional brackets on orthodontic treatment as perceived by practicing orthodontists, and more specifically, if the proposed advantages of SL brackets are evident in clinical practice. Methods: A survey was developed to evaluate how SL brackets compare to conventional brackets
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Burke, Brandon. "Perception of soft tissue laser use in orthodontic practice: a survey of orthodontists, periodontists, and general dentists." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2199.

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Recently, soft tissue lasers have been introduced into orthodontic practice to perform procedures that were traditionally referred to other dental professionals. The purpose of this study was to compare the attitudes of orthodontists, periodontists, and general dentists regarding the use of soft tissue lasers by orthodontists. The ultimate goal was to facilitate communication among dental professionals and improve the care of orthodontic patients requiring management of soft tissues. A survey was developed to evaluate and compare the current opinions of orthodontists (n=330), periodontists (n
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Ivanov, Pavel. "Investigation of diode laser debonding of ceramic orthodontic brackets." Thesis, NSUWorks, 2012. https://nsuworks.nova.edu/hpd_cdm_stuetd/52.

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A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry. ABSTRACT The significance of this research was to identify the optimal techniques to remove ceramic orthodontic appliances in order to prevent tooth-enamel fracture, pain, and esthetic complications. Discomfort and pain are common occurrences during orthodontic appliance removal. In debonding (bracket removal) appointments, less force, measured as reduced shear bond strength (SBS) is preferable because greater force creates more discomfort and pain. In a previou
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Lill, Daniel J. "Importance of Pumice Prophylaxis for Orthodontic Bonding with Self-etch Primer: An in vivo Study." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1220.

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Self-etching primers (SEP) have recently simplified the orthodontic bonding process and questions have arisen regarding their reliability and efficiency. The goal of this study was to assess the importance of a pumice prophylaxis prior to bonding with SEP (Transbond Plus, 3M Unitek, Monrovia, CA) in reducing bond failures. Thirty orthodontic patients volunteered to participate in this split-mouth prospective clinical trial. A pumice prophylaxis experimental group and a non-pumice control group of teeth were randomly assigned in a contralateral quadrant pattern within each patient. A total
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Varner, Taylor Blake. "Landmark-based approach to examining changes in arch shape: a longitudinal study." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1783.

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Objective: Variation in dental arch shape and arch relations from the primary to the permanent dentition were studied in an untreated longitudinal sample from the Iowa Fluoride Study and Growth Study data (55 females and 63 males). Methods: 3D coordinate data from 68 landmarks located on maxillary, mandibular, and occlusal dental cast scans from ages 5, 9, and 13 were submitted to a Procrustes fit prior to a Principal Component (PC) analysis to capture symmetric and asymmetric aspects of arch shape variation. Covariance pattern models were used to determine longitudinal arch shape changes from
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