Dentistry Commons^™

The Effect Of Grinding And Polishing Of Zirconia Surfaces On Surface Roughness, Gloss And Antagonist Wear, Manar Mohammed Alzahrani

Student Theses, Dissertations and Capstones

Objective. This study was conducted to evaluate the surface roughness and gloss of yttrium-stabilized tetragonal zirconia after grinding and/or polishing of the surfaces and to investigate the effects of grinding and/or polishing on wear rate of zirconia and its composite antagonist. Background. Many clinicians are extremely concern about delivering zirconia restorations after proper glazing procedure, but in some cases, chair-side modification of the occlusal surfaces is required after cementation in order to obtain proper occlusion, which produces rough surfaces. Loss of the original zirconia gloss and wear of opposing dentition or restorations are some of the drawbacks of rough surfaces. …

Effect Of Water Immersion On The Resistance To Sliding Of Coated Orthodontic Archwires, Jun Sik Kim

Student Theses, Dissertations and Capstones

Objectives: The objective of this in vitro study is to compare the resistance to sliding (RS) of coated and uncoated orthodontic archwires in ceramic brackets at various water-immersion times and bracket angulations. Background: Tooth-colored orthodontic systems have been developed to meet the patient’s esthetic needs. Ceramic brackets and polymer-coated archwires have been shown to demonstrate higher RS than metal brackets and archwires in dry conditions. However, there is no study to address the RS of coated archwires depending on water-immersion times as in the oral cavity. Therefore, it is necessary to examine RS of coated archwires sliding in ceramic brackets …

Indirect Bonding Of Orthodontic Brackets: A Comparison Of Positional Accuracy Between Software Vs. Stone Model Driven Techniques, Francesca Scilla Smith

Student Theses, Dissertations and Capstones

Background: Many orthodontic clinicians consider indirect bonding of orthodontic brackets as a method of achieving greater accuracy and effectiveness in orthodontic treatment. Currently, few features of our world have escaped the influence of technology. The indirect system of orthodontic bonding offers an example of technology’s power through a computer-driven system that enables customized bracket placement that optimizes esthetics, accuracy, precision and efficiency. The purpose of this study was to compare the positional accuracy and reliability between traditional and computer-generated indirect bonding techniques. Methods: A total of 210 brackets (STEP metal brackets with slot size .022x.028) were placed using a four …

Tooth Size Comparison Between Citizens Of The Chickasaw Nation And Caucasians, Tyler Chance Devaughan

Student Theses, Dissertations and Capstones

Objective The goal of this study is to establish normative tooth crown size (mesio-distal width) data for the Chickasaw Nation and demonstrate how it relates to Caucasian standards. Background: Tooth size ratios represent a diagnostic tool that allow for a prediction of treatment outcomes. A proper relationship of the total mesio-distal width of the maxillary dentition to the mesio- distal width of the mandibular dentition will favor an ideal post treatment occlusion. If a patient has a significant tooth size discrepancy between the dental arches, alignment of the teeth into this ideal occlusion may not be possible. Patients commonly receive …

Investigating Lip Protrusion Aesthetics By Comparing The Facial Profile View With An Oblique View, Barak Jones

Student Theses, Dissertations and Capstones

Introduction: Orthodontists strive to enhance facial esthetics. Notable orthodontists including Holdaway, Ricketts, Merrifield and more each made contributions to help diagnose facial disharmonies and improve treatment outcomes. Numerous studies have evaluated the face from two perspectives, frontal and profile. Orthodontic treatment can significantly transform a facial profile. Orthodontic literature has time and again compared photos, line drawings and silhouettes in order to define a harmonious profile. Some have concluded that a more protrusive lip profile than what had been outlined traditionally is now preferred. However, while this debate continues, in this dynamic world the profile perspective is not the most …

Oral Health: The Need For Both Conventional Microbial And Molecular Characterization, Elisheva Friedman, Negin Alizadeh, Zvi G. Loewy

Touro College of Pharmacy (New York) Publications and Research

This study aims to consider the microbial distribution in oral disease, as well as gene analysis and expression, in elucidating: 1, the fundamental underpinnings of oral disease, and 2, the potential relationship between oral diseases and systemic health. A key focus is identifying the microbiota associated with oral disease manifestations characterized by both conventional microbiological and molecular methods. Variations in the observed microbial populations characterized by conventional and molecular approaches have been identified for caries, periodontitis, peri-implantitis, and stomatitis. The discovery of therapeutic approaches for oral disease will require comprehensive microbial and genomic analysis. This study evaluated the current state …

Obstructive Sleep Apnea Educational Intervention Of Dental Hygiene Students, Kathrine Pottle

EWU Masters Thesis Collection

Purpose: Dental hygienists (DHs) have a unique opportunity to screen for OSA, but receive limited OSA education within the DH curriculum. This study was conducted to determine if an online educational intervention could significantly increase the knowledge of information relevant to obstructive sleep apnea (OSA) screening in dental hygiene (DH) students. Methods: OSA knowledge was assessed with a 17 question, comprehension based pre-test and post-test. The convenience sample consisted of first year DH students enrolled in DNHY 341S Management of the Medically Compromised at Eastern Washington University (EWU). Participants completed the pre-test, viewed the OSA educational video, completed a post-test, …

Measuring Determinants Of Oral Health Behaviors In Parents Of Low-Income Preschool Children, Josefine Ortiz Wolfe

Walden Dissertations and Doctoral Studies

Dental decay is a preventable disease, but it remains the most unmet healthcare need of American children. Untreated dental decay has adverse and long-lasting effects on a child's quality of life. Healthy oral habits among preschool children are essential for a healthy permanent dentition and are achieved primarily by 3 oral health related behaviors: proper dental hygiene, a healthy noncariogenic diet, and regular dental visits. This quantitative study, based on the theory of planned behavior, explored the relationship between these 3 oral health behaviors and 4 determinants: attitude, subjective norms, perceived behavioral control, and intention, using a 71-item questionnaire. The …

Roles Of Community Pharmacists In Improving Oral Health Awareness In Plateau State, Northern Nigeria, Olaniyi O. Taiwo

Walden Dissertations and Doctoral Studies

There is poor oral health awareness in Nigeria. This is mainly attributed to limited access to correct information on oral health as well as a lack of oral health care providers. The impact of the poor oral health awareness is worse in Northern Nigeria due to the uneven distribution of oral health care workers and training facilities. The purpose of this cross-sectional study was to describe the roles of community pharmacists (CPs) in Plateau State, Nigeria as sources of oral health information. Theoretical framework for this study was the theory of planned behavior (TPB). Background knowledge and practices of oral …

Translation And Validation Of The Spanish Version Of The Rapid Estimate Of Adult Literacy In Dentistry-30, Wilma Luquis

Walden Dissertations and Doctoral Studies

Low or marginal health literacy affect nearly 90 million citizens in the United States, compromising health outcomes, including oral health. Oral health literacy has been studied in diverse populations, yet the assessments used were developed and validated for English-speaking populations. A validated Spanish-language oral health literacy assessment was needed to help researchers and practitioners evaluate oral health literacy in the Hispanic population. Using the oral health literacy framework, the purpose of this study was to translate, culturally adapt, and validate a Spanish version of a previously validated English-language oral health literacy. A translation-back-translation process was applied to the English version …

Perceived Parental Barriers To Preventive Dental Care Programs For Children, Kim Attanasi

Walden Dissertations and Doctoral Studies

Dental caries is the most prevalent childhood illness and disproportionately affects children from low socioeconomic backgrounds. Dental organizations are collaborating within communities to decrease oral health disparities among children by offering free preventive oral health events. These programs face the problem of low enrollment due to lack of informed parental consent. Also, gaps in the literature indicated the need to examine oral health perceptions and dental-care-seeking practices of culturally diverse low-income parents regarding preventive care for their children. The purpose of this qualitative case study was to explore the reasons why parents are not allowing their children to participate in …

Development Of 3d Pcl Microsphere/Tio2 Nanotube Composite Scaffolds For Bone Tissue Engineering, Kimia Khoshroo, Tahereh S. Jafarzadeh Kashi, Fathollah Moztarzadeh, Mohammadreza Tahriri, Hossein E. Jazayeri, Lobat Tayebi

School of Dentistry Faculty Research and Publications

In this research, the three dimensional porous scaffolds made of a polycaprolactone (PCL) microsphere/TiO₂ nanotube (TNT) composite was fabricated and evaluated for potential bone substitute applications. We used a microsphere sintering method to produce three dimensional PCL microsphere/TNT composite scaffolds. The mechanical properties of composite scaffolds were regulated by varying parameters, such as sintering time, microsphere diameter range size and PCL/TNT ratio. The obtained results ascertained that the PCL/TNT (0.5 wt%) scaffold sintered at 60 °C for 90 min had the most optimal mechanical properties and an appropriate pore structure for bone tissue engineering applications. The average pore size …

Evaluation Of A Post-Treatment Follow-Up Program In Patients With Oral Squamous Cell Carcinoma, Andre Peisker, Gregor F. Raschke, Arndt Guentsch, Paul Luepke, Korosh Roshanghias, Stefan Schultze-Mosgau

School of Dentistry Faculty Research and Publications

Objectives

The duration and the frequency of follow-up after treatment of oral squamous cell carcinoma are not standardized in the current literature. The purpose of this study was to evaluate our local standard post-treatment and follow-up protocol.

Materials and methods

Overall, 228 patients treated curatively from 01/2006 to 07/2013 were reviewed. To evaluate the follow-up program, data on the secondary event were used. To determine risk groups, all patients with tumor recurrence were specifically analyzed. Relapse-free rate were estimated by the Kaplan-Meier product limit method. The chi-square test was used to identify independent risk factors for tumor relapse.

Results

In …

Immunohistochemical Analysis Of Il-1 Beta In The Discs Of Patients With Temporomandibular Joint Dysfunction, Luis Eduardo Almeida, Sean Pierce, Joseph Zacharias, William E. Cullinan, Lucia Noronha, Marcia Olandoski, Vinicius Tramontina, Carla Loreto, Rosalia Leonardi

School of Dentistry Faculty Research and Publications

Purpose: Interleukin-1 beta (IL-1β) is a cytokine that participates in the regulation of immune responses and inflammatory reactions. It is hypothesized that IL-1 levels may be elevated in patients suffering from temporomandibular joint dysfunction. The purpose of this study was to determine the association of IL-1β expression with TMD using an immunohistochemical approach to evaluate the joint disc.

Materials and methods: A total of 39 human temporomandibular joint disc samples were collected, with 31 samples in the test group. Nineteen of the test group samples were from discs of patients with anterior disc displacement with reduction, and 12 …

Expression Of Mmp-13 In Human Temporomandibular Joint Disc Derangement And Osteoarthritis, Juliano Henrique Perotto, Flavio Camejo, Andrea Doetzer, Luis Eduardo Almeida, Marina Azevedo, Marcia Olandoski

School of Dentistry Faculty Research and Publications

Objective: MMP-13 performs digestion of collagen, which is a primary component of the temporomandibular joint (TMJ) articular disc. This study evaluated the expression of MMP-13 in patients with anterior disc displacement with (ADDwR) and without reduction (ADDwoR), and in the presence of TMJ osteoarthrosis.

Methods: Thirty-nine human temporomandibular joint disc samples were collected and divided in two ways: ADDwR (21 samples), ADDwoR (10 samples), and a control group (8 samples); and with osteoarthrosis (10 samples) and without osteoarthrosis (29 samples). Immunostaining of the TMJ discs was statistically compared between the groups.

Results: There was no statistically significant difference for the …

The Relationships Between Fluoride Intake Levels And Fluorosis Of Late‐Erupting Permanent Teeth, Pradeep Bhagavatula, Alexandra Curtis, Barbara Broffitt, Karin Weber-Gasparoni, John J. Warren, Steven M. Levy

School of Dentistry Faculty Research and Publications

Objectives

To examine the relationships between fluoride intake levels and fluorosis of late‐erupting permanent teeth.

Methods

The current study used information collected from 437 children in the longitudinal Iowa Fluoride Study. Participants' fluoride intake information was collected using questionnaires from birth to age 10 years. Estimated mean daily fluoride intake was categorized into low, moderate, and high intake tertiles for each age interval (2‐5, 5‐8, and 2‐8 years). Bivariate analyses were performed to study the relationships between self‐reported fluoride intake levels during three age intervals and dental fluorosis.

Results

For canines and second molars, the prevalence of mostly mild fluorosis …

Effect Of One Piece Versus Two Piece Mini Implants On Bone Height Of Implant Retained Mandibular Overdenture, Fardos N. Rizk, Jehan Fikry Prof., Amr Badr, Ahmed Damarisy Dr.

Dentistry

Introduction: Severely atrophied mandibles are a common problem within elderly completely edentulous patients. Given their small diameters, long height and self-tapping characteristics, miniimplant retained over-dentures are a valuable treatment option in such patients. Mini-implants are usually once-piece implants, however recently two-piece mini-implants were introduced with aim of addressing the angulation problems. The success of the latter has not been thoroughly studied. Crestal bone height measurements are normally used to evaluate implant success. Therefore this study was conducted to evaluate the effect of one piece versus two piece ERA mini implants on crestal bone height of implant retained mandibular over-denture. Materials …

Mucosa-Supported Stereolithographic Surgical Guide Versus Conventional Surgical Stent In Implant Supported Overdenture, Fardos N. Rizk, Marwa Sabet Prof., Shaimaa Azoz, Eman Gamal

Dentistry

Purpose: The aim of the study was to compare between the accuracy of mucosa-supported stereolithographic surgical guide versus conventional surgical stent in implant supported overdenture. Materials and methods: Twelve patients with completely edentulous patients were selected for this study and divided into three groups. Group (A): 8 implants were placed in the mandible using conventional surgical stents during implant insertion. Group (B): 8 implants were placed in the mandible using partially limiting mucosa-supported stereolithographic (SLA) surgical guide during implant insertion. Group (C): 8 implants were placed in the mandible using completely limiting mucosa-supported stereolithographic (SLA) surgical guide during implant insertion. …

A Study Of The Relationship Between Job Related Stress And Temporomandibular Disorders In Accountants Working In Jakarta, Cindy Maura Saputra, Laura Susanti Himawan, Ira Tanti

Journal of Dentistry Indonesia

Stress is a known risk factor for Temporomandibular Disorders (TMD), however there are few studies of TMD in people who work in high stress jobs. Accounting is a profession known for its high levels of stress and expectation. Objective: The aim of this study is to investigate the relationship between the intensity and frequency of job related stress and the occurrence of TMD in accountants in Jakarta. Methods: A cross-sectional study, with ethics approval from the Ethical Committee of the Faculty of Dentistry, University Indonesia, was performed on 116 accountants aged 21 to 50, living in Jakarta. Subjects were asked …

Digital Holographic Microscopy Of Phase Separation In Multicomponent Lipid Membranes, Vahideh Farzam Rad, Ali-Reza Moradi, Ahmad Darudi, Lobat Tayebi

School of Dentistry Faculty Research and Publications

Lateral in-homogeneities in lipid compositions cause microdomains formation and change in the physical properties of biological membranes. With the presence of cholesterol and mixed species of lipids, phospholipid membranes segregate into lateral domains of liquid-ordered and liquid-disordered phases. Coupling of two-dimensional intralayer phase separations and interlayer liquid-crystalline ordering in multicomponent membranes has been previously demonstrated. By the use of digital holographic microscopy (DHMicroscopy), we quantitatively analyzed the volumetric dynamical behavior of such membranes. The specimens are lipid mixtures composed of sphingomyelin, cholesterol, and unsaturated phospholipid, 1,2-dioleoyl-sn-glycero-3-phosphocholine. DHMicroscopy in a transmission mode is an effective tool for quantitative visualization of phase …