Medicine and Health Sciences Commons^™

Hydrophobically Modified Isosorbide Dimethacrylates As Biomaterials For Bisphenol A Free Dental Fillings, Bilal Marie

Dissertations

Amalgam and Bisphenol A glycerolate dimethacrylate (BisGMA) are the main dental filling materials in use today. Because of the negative perception of amalgam and its lower esthetic appeal, as well as the desire to replace the endocrine disruptor Bisphenol A, which is the building block of BisGMA, there has been a critical need to search for safer alternatives to these dental filling materials.

Isosorbide is a sugar-based molecule generally recognized as safe. It has been extensively studied as a replacement to the Bisphenol A core in various materials. However, isosorbide is extremely hygroscopic, and water uptake in dental fillings causes …

Alignment Of Cervical Vertebrae And Reliability Of Cephalometric Measurements, Ece Agirgol

Theses & Dissertations

Cervical vertebrae are in close relationship with dentofacial structures due to their anatomical position. In previous studies, the inclination of cervical vertebrae was measured by mostly Nasion-Sella line as the reference plane to evaluate the relationship with dentofacial structures.

The aim of this study is to observe the correlation between cervical vertebrae inclination and lateral cephalometric measurements. 124 lateral cephalograms taken in Natural Head Position of subjects over 18 years of age were traced with Dolphin Imaging Software 11.95 Premium. Cervical vertebrae inclination was measured by using the lines passing from landmarks on second, third and forth cervical vertebrae. Correlation …

The Effect Of Orthodontic Treatment With Extraction On The Upper Airway Dimensions And Three-Dimensional Morphology: A Retrospective Study Using Cone-Beam Computed Tomography Technique, Ehsan Mostaghni

Theses & Dissertations

The purpose of this study was to evaluate the effect of orthodontic treatment with and without extractions of teeth on the upper airway dimension and morphology. Records of 40 consecutively treated patients who received orthodontic treatment with or without dental extractions were evaluated. Pre-and post-treatment volumes, minimum cross-sectional areas, and linear dimensions of oropharyngeal airways were quantified using InVivo Dental 6.0 (Anatomage, San Jose, CA). Additionally, pre and post CBCT images of the upper airways were superimposed on each other using voxel-based registration and fixed coordinate system using 3D Slicer 4.1.1 (www.Slicer.org) and ITK-SNAP (http://www.itksnap.org). While the …

Validation Of The Flexcell®Fx-5000 Tension System To Evaluate The Expression Of Cementum Protein-1 In Human Periodontal Ligament Cells While Under Cyclical Orthodontic Tensile Force, Allison Nicholls

Electronic Thesis and Dissertation Repository

The pressure-tension theory of orthodontic tooth movement (OTM) states that there are differences in microenvironment between the tension and compressions side within the periodontal ligament, leading to differential gene expression within those zones. Cementum protein 1 (CEMP-1) is a human-specific protein localized to the root of a tooth and may play a role in OTM. The first objective was to develop a protocol to apply tensile force to human PDL cells similar to that within the tension zone during OTM. For this, the FlexCell®FX-5000 Tension system was used and fluorescent microscopy was used to confirm validity of the protocol. The …

Stress And Anxiety Experience Of Dental Hygiene Students, Kristen Ford

Electronic Theses and Dissertations

The ETSU dental hygiene program is very competitive and rigorous for those admitted. Student dental hygienists may experience higher levels of anxiety and more stressors while completing their course work and clinical hours than they have previously experienced in general education and prerequisite courses. These increased number of stressors and higher levels of anxiety may have negative impacts on students’ academic performance and success in clinical learning environments. A better understanding of the actual need for a stress reduction and anxiety management curriculum will facilitate creating and implementing this type of curriculum. A total of 44 current ETSU dental hygiene …

The Influence Of Cbct-Derived 3d-Printed Models On Endodontic Microsurgical Treatment Planning And Confidence Of The Operator, Shreyas Oza, Johnah C. Galicia

Orthodontics and Endodontics Theses

Aims Use of 3D printed models in Endodontics has been gaining popularity since the technology to create them became more affordable. Currently, there are no studies that evaluate the influence of 3D models on endodontic surgical treatment planning and on operator confidence. Therefore, aims of this study were to: (i) Determine whether the availability of a 3D printed analogue can influence treatment-planning and operator confidence; and, (ii) Assess which factors of operator confidence are influenced, if any.

Materials and Methods Endodontists were asked to analyze a pre-selected CBCT scan of an endodontic surgical case and to answer a questionnaire that …

Variants Of Facial Shape Genes In Patients With Class Ii Or Class I Malocclusion, Mahsa Mortazavi, Marie M. Tolarová Md, Phd, Drsc, Mirek Tolar

Orthodontics and Endodontics Theses

Background and purpose: In recent years, questions regarding the genetic and environmental factors affecting variation in human craniofacial morphology have received increasing attention. Medical and clinical genetic research using family studies has proven foundational for our understanding of which genes affect craniofacial variation. On the other hand, cephalometricbased studies showed a relationship between the cranial base and midface characteristics among individuals with different skeletal pattern of malocclusion. The purpose of our pilot study was to analyze specific variants of facial genes that were suggested to be associated with cranial base width and depth in Class II and Class I malocclusions. …

Variants Of Pax Gene Family In Patients With Class Ii Or Class I Malocclusion, Mana Naeim, Marie M. Tolarová Md, Phd, Drsc, Mirek Tolar

Orthodontics and Endodontics Theses

Background and Purpose. Orthodontic treatment helps to ensure proper function of teeth and to create healthy smiles. To this aim, the orthodontist’s goal is establishment of an esthetic harmony between soft and hard tissues of the face. Dimensions of facial width and height are crucial for accurate diagnosis and formulation of an efficient treatment plan. A knowledge of genetic determinants of these dimensions in Class II patients will deepen our understanding of etiology of skeletal Class II malocclusions and would make it possible to personalize a patient’s treatment plan. The purpose of our pilot study was to analyze, if specific …

Evaluating The Treatment Effectiveness And Efficiency Of The Df2 Protocol Using Invisalign® For Treatment Of Class Ii Malocclusion: A Retrospective Comparison Study, Bryan J. Otis

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: This retrospective study evaluated the treatment effectiveness and efficiency of the DF2 protocol for correction of class II malocclusions in comparison to conventional protocol using Invisalign®.

Materials and Methods: Clinical and cephalometric data of patients that were treated for class II malocclusion between July 30, 2014 and July 22, 2021 were reviewed and selected. The selected patients were matched for age, sex, and treatment complexity and divided into two groups: Group 1 (G1) —DF2 protocol and Group 2 (G2)—conventional class II Invisalign®. Clinical variables to represent the skeletal and dentoalveolar changes during treatment were assessed using pre-treatment (T1) …

The Effect Of Locally Applied Simvastatin On Clinical Attachment Level And Alveolar Bone In Periodontal Maintenance Patients, Lauren Krell

Theses & Dissertations

The purpose of this double-blinded, randomized, controlled trial was to determine if the local application of simvastatin (SIM), combined with minimally invasive papilla reflection and root preparation (PR/RP), is effective in improving clinical attachment level (CAL), primary outcome measure; probing depth (PD) reduction; increasing interproximal bone height (IBH); and reducing bleeding on probing (BOP) in persistent 6-9 mm periodontal pockets in patients receiving periodontal maintenance therapy (PMT). Fifty patients with Stage III, Grade B periodontitis (AAP, 2018) presenting with a 6-9 mm interproximal PD with a history of bleeding on probing (BOP) were included in the study. Experimental 2.2 mg …

The Effect Of Simvastatin On Periodontonal Inflammation In Periodontal Maintenance Patients, Devin L. Christiansen

Theses & Dissertations

The purpose of this analysis of inflammation markers from a double blinded, randomized, controlled clinical trial was to determine if local application of simvastatin, combined with minimally invasive papilla reflection/root preparation (PR/RP) is effective in reducing markers of inflammation: 1) bleeding upon probing (BOP), 2) tissue inflammatory / anti-inflammatory gene activation (rt-PCR) and 3) corresponding gingival crevicular fluid (GCF) protein production in non-resolving 6-9 mm periodontal pockets in patients on periodontal maintenance therapy (PMT). Fifty periodontal maintenance patients diagnosed with advanced chronic adult periodontitis presenting with a 6-9 mm interproximal PD were included in study. Experimental (PR/RP+SIM; n=27) and control …

Examining Parents Oral Hygiene Knowledge And Their Children’S Oral Hygiene Behaviors, Wallace Moore

All Theses And Dissertations

The purpose of this quantitative study was to examine the relationship between a parent’s level of oral hygiene knowledge and the oral hygiene behaviors of their children ages 7 to 17 in the greater United States. The theoretical framework of Albert Bandura’s Social Cognitive Theory and the Health Belief Model guided the study. Instruments included the Oral Health Surveys Basic Methods 5th Edition and the Fourth National Survey of China for data collection. Q Data analysis was performed utilizing the chi-square test of independence to determine the likelihood of a relationship between the parent’s oral hygiene knowledge and their child’s …

Tobacco Cessation Counseling Practices Amongst Dental Hygienists In Central Texas, Lacy Murray

Electronic Theses and Dissertations

Although tobacco cessation is an uphill battle for almost everyone who attempts to quit, it is important that dental hygienists do not assume that patients are not interested. Dental hygienists are in an ideal position to offer cessation help to their tobacco using patients. The purpose of this study was to gain a better understanding of the tobacco cessation practices among central Texas dental hygienists. Specifically, dental hygienists were asked about beliefs, motivation, and confidence with regard to their tobacco cessation practice. A positive significant, moderate, relationship was found between beliefs and confidence (r=0.647), beliefs and practices ( …

Development Of 3d-Bioprinted Scaffolds For Oral Probiotic Application., Jhanvi Patel

Electronic Theses and Dissertations

Background: Porphyromonas gingivalis adheres to and invades gingival epithelial cells, resulting in decreased cell viability. Previous studies have indicated that probiotics are effective against dental pathogens; however, few approaches provide sustained-delivery of active agents in the oral cavity. Hypothesis: Probiotics will limit P. gingivalis effects on Telomerase Immortalized Gingival Keratinocyte (TIGK) cells and 3D-printed scaffolds will prolong probiotic release. Methods: Lactobacillus acidophilus, Lactobacillus reuteri, and Bifidobacterium bifidum were assessed with adhesion and antibiotic protection assays to limit P. gingivalis effects on TIGKs. Scaffolds were printed with a select probiotic and evaluated for release kinetics. Results: Free L.a., …

Effects Of Fluoride On Corrosion Properties Of Orthodontic Retention Wires, John J. Simindinger

Master's Theses (2009 -)

Objective: Alloys used in retention wires corrode in the oral environment. Previous studies have examined the effects of fluoride on archwires used in active treatment, but not on retention wires. The goal of this study was to determine what effect fluoride exposure has on corrosion of various lingual bonded retainer wires in the mouth. Methods: Twenty samples from six different wire types were tested in two solutions. Half were tested in Fusayama-Meyer artificial saliva, while the other half were tested in Fusayama-Meyer plus fluoride correlated to the concentration of toothpaste. A potentiostat was used to measure open circuit potential (OCP) …

In Vitro Study To Analyze Reverse Torque Values Of Prosthetic Screws With Multiple Loosening/Tightening Preload Cycles, Amira Alhameed

Master's Theses (2009 -)

Purpose: To determine the number of loosening/tightening preload cycles prosthetic retaining screws can withstand before fracture, and to record the reverse torque values on each of the 10 applications of screw tightening and loosening. Materials and methods: The testing assemblies consisted of 30 temporary cylinder/multiunit abutment/internal connection implants, 10 each from Biohorizons, Zimmer Biomet Dental, and Dentsply Sirona Astra; the specimens were inserted into resin blocks. Temporary cylinders were connected to the abutments with new prosthetic screws and torqued to the appropriate preloads. The first tests of repeated tightening/loosening preload cycles were applied using a Digital ® torque gauge instrument …

Comparing Orthodontic Debonding Aerosol Production With Various High-Volume Evacuation Systems, Eric Moe

Master's Theses (2009 -)

Objective: The COVID-19 pandemic has placed a new emphasis on defining aerosol generating procedures and evaluating ways to reduce those aerosols. Both biocontaminants and particulate matter can potentially be transmitted with dental aerosols with negative health effects associated with each, especially aerosols with particulate matter of 2.5 micrometers or less (PM2.5). This study aims to evaluate the PM2.5 aerosol production from orthodontic debonding with a high-speed, air-driven handpiece without water coolant and assess the effectiveness of traditional four-handed high-volume evacuation (HVE) and two commercially available hands-free high-volume evacuation (HFHVE) systems. Methods: Orthodontic debonding was simulated using a dental manikin and …

Effects Of Cleaning Agents On The Properties Of Two Different Thermoplastic Retainer Materials, Jennifer Brehove

Master's Theses (2009 -)

Objective: There are several different thermoplastic retainer materials and cleaning methods available to fabricate and clean clear retainers. Some studies have investigated the changes in properties of clear retainers after being exposed to different staining agents, varying levels of mechanical strain, and different cleaning agents. However, there are few studies that compare different thermoplastic materials to each other when being subjected to these different types of stresses. The aim of this study is to evaluate the changes in properties of two commonly used thermoplastic retainer materials, polyethylene terephthalate (PETG) and ethylene/propylene (EP), after exposure to different retainer cleaning agents over …

Mechanism Of Mechanical Vibration In Enhancing Orthodontic Retention, Brent A. Ito

Master's Theses (2009 -)

Introduction: Low-magnitude, high-frequency (LMHF) mechanical vibration is proven to be anabolic and can increase alveolar bone mass. The objectives of this study were to generate an orthodontic retention cell culture model and investigate the effects of LMHF mechanical vibration on human periodontal ligament fibroblast (HPLF) cells after orthodontic loading (retention) in vitro. Materials and Methods: HPLF cells were seeded at a density of 4x105/well in 6-well Flexcell culture plates (Day 0). On day 3, the cells were mechanically stretched (15% surface extension) for 1 hour to mimic orthodontic loading/tension in vitro. On day 5, the cells were randomly assigned to …

Bending And Phase Transformation Properties Of A Force Gradient Nickel-Titanium Orthodontic Wire, Brinda Shah

Master's Theses (2009 -)

Objective: Conventional nickel-titanium (NiTi) archwires have widespread application in orthodontics due to their unique properties and ability to move teeth with light, continuous forces, but a shortcoming is that they apply near-uniform force along anterior and posterior teeth. Since the force needed to effectively move teeth is a function of the root surface area and bony support, these archwires cause single-rooted teeth to move more than the multi-rooted molars. With the advent of laser-engineered force gradient NiTi orthodontic archwires, individual forces may be applied to different segments or individual teeth of the arch to maximize tooth movement. The aim of …

Use Of An Innovative Simulated-Virtual Training To Improve Dental Hygiene Students’ Self-Reported Knowledge, Attitudes, And Confidence In Providing Care To Child Patients With Autism Spectrum Disorder, Kimberly Frances Cenzon

Dental Hygiene Theses & Dissertations

Problem: As the diagnosis prevalence of Autism Spectrum Disorder (ASD) increases, it is important for dental hygiene students to be knowledgeable and comfortable in providing care to children with ASD. However, limited clinical experiences can result in decreased confidence in the ability to interact with children diagnosed with ASD in a clinical setting. Methodology: A convenience sample of 34, second-year dental hygiene students were recruited from a 4-year entry-level Dental Hygiene program. A simulated-virtual training (SVT) module was developed as an interactive approach for educating dental hygiene students on providing care to a child patient with ASD in a clinical …

The Acquisition Of Dental Competencies And Clinical Skills: Perceptions From Students, Faculty, Practicing Dentists And Industry Professionals In The Dominican Republic, Laura Virginia Reyes Alardo

Dissertations

The Dominican healthcare system faces many challenges, and dental education is not an exception. The lack of competencies established for dentistry is one of the most critical challenges that dentistry faces. There is no way to guarantee that all dentists receive the same quality education with no standards and lack of competencies. Previous research has revealed that the competencies achieved by dental students determine the way such students develop their professional practice in the future as dental graduates (Alcota, De Gauna, & González, 2016). However, there is a lack of shared language observed in dental education around the world. Not …

The Rates Of Caries Prevalence By Sex And Age From Individuals In St. Mary Graces And East Smithfield Cemeteries, Elizabeth Houston, Joseph Upton

Honors Theses

Caries are a common pathology in past and current populations, and because of the close interaction of dentition with diet, archaeologists are able to infer components of a population’s culture from pathology like caries (Lanfranco & Eggers, 2010). Most literature implies that women have higher rates of caries than men because of cultural practices and natural physiological differences which are thought to put women at an increased risk (Lukacs, 2008). Another established trend throughout literature is that caries prevalence tends to increase with age, regardless of sex (Hillson, 2008). We evaluated data from the East Smithfield (1348-1350 AD) and Saint …

Scardovia Wiggsiae And Streptococcus Sobrinus Prevalence Among Orthodontic And Non-Orthodontic Patients, Melissa Trumbo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Dental cavities or caries have been identified as among the most prevalent of preventable oral conditions. However, studies are discovering new information regarding the incidence and prevalence of several cariogenic organisms, including Streptococcus mutans (SM), the recently discovered Scardovia wiggsiae (SW), as well as Streptococcus sobrinus (SS). These studies have revealed varying prevalence among different populations, such as those undergoing orthodontic treatment. Based upon this information, the main goal of the current study was to assess the prevalence of specific cariogenic organisms (SS and SW) within saliva samples originally obtained from a dental school-based clinic.

Methods: The protocol for …

Community Health Nursing In Ghana: Dental Hygiene, Alexis Llewellyn

The Eleanor Mann School of Nursing Undergraduate Honors Theses

Dental hygiene is an important contributor to our overall health. Poor dental hygiene practices can lead to plaque buildup, cavities formation, tooth decay, and infection. Infection that began as a result of poor oral hygiene can spread to other parts of the body and cause more serious conditions to develop. Dental health is not a priority among Ghanaian residents and there is a need for updated, evidence based research about this topic. This literature review focuses on community health nursing in Ghana, Africa regarding dental hygiene of the pediatric population in this country. The primary focus is to compare the …

Assessment Of The Infrazygomatic Crest And Distal Infrazygomatic Crest For Bone Depth And Miniscrew Insertion, Kyle C. Tuttle

UNLV Theses, Dissertations, Professional Papers, and Capstones

The aim of this study was to analyze and compare the bone depth at various postulated miniscrew insertion angles in both the Infrazygomatic Crest (IZC) and Distal Infrazygomatic Crest (DIZC) regions. Furthermore, root morphologies of the maxillary 1st and 2nd molars and their effect on bone depth and the various miniscrew insertion angles were analyzed.

A total of 69 CBCT images were collected from pre-orthodontic adult patients at the UNLV orthodontic residency clinic. Bone depth measurements were made at 8 postulated miniscrew insertion angles starting at 40° up to 75°. All measurements were recorded from the buccal bone at the …

Enamel Histological Indicator: Growth In Incisors Vs. Canines, Nisha Zaver

Chancellor’s Honors Program Projects

No abstract provided.

Mapping Nevada's Dental Workforce, Kelvin Chen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Access to care is a concern at the forefront of public health. Due to socioeconomic and geopolitical pressures, the distribution of healthcare providers across a population often does not coincide with the demand for healthcare in a specific geographic area. Rural areas typically do not have enough providers and urban areas typically have too many. This stark reality underscores an inherent inefficiency in the allocation of healthcare resources and is a discrepancy that must be addressed by state-sponsored institutions and programs. From a public health perspective, the problem of insufficient or lack of access to care is the greater of …

Understanding The Role Of Ano1 In Oral Cancer, Mallary Forrest

UNLV Theses, Dissertations, Professional Papers, and Capstones

In 2008, the gene ANO1 was discovered to encode a calcium activated chloride channel. This gene is located on the 11q13 locus, a locus that is commonly amplified in many cancers including cancer of the head and neck. ANO1 is situated in close proximity to genes associated with growth and apoptosis. As rapid proliferation and lack of apoptosis are hallmark characteristics of cancer, growth factors and apoptosis mediators are expected to be altered in cancer. But what does a calcium activated chloride channel have to contribute to cancer’s pathogenesis? Is it an active gene in cancer progression or is it …

Catechol-Containing Copolymers As An Active Ingredient For Denture Adhesives, Vincent Ying Wun Kong

Electronic Thesis and Dissertation Repository

Moisture inside the mouth adds challenge to making denture adhesives formulations. Some formulations have zinc to enhance adhesion on wet skin despite knowing the health hazards. Inspired by mussel foot proteins’ catechol unit’s strong underwater adhesion, nine catechol-containing copolymers (P1A-P3C) were synthesized by free radical polymerization of 3,4-dimethoxystyrene (3,4- DMS) with different styrene derivatives followed by deprotection. P1A-P3C were used to make Fn(P)-C-PBS denture adhesive formulations which had suitable shear stresses around ≥ 5 kPa satisfying ISO 10873. In-situ NMR studies of free radical polymerization of 3,4 - DMS and styrene derivatives allowed computation of their reactivity ratios showing all …