A Comparison Of Soft Tissue Topographical Norms For The Local Ethnic People Of Zimbabwe And African American Norms Based On 3dmd Soft Tissue Photography, Elvin Bhaskar

All ETDs from UAB

Introduction: The purpose of this study is to determine the soft tissue topographical norms for the local ethnic people of Zimbabwe and compare them with the African American norms based on 3dMD soft tissue photography. The rationale for the study is to evaluate how the soft tissue drape over the facial skeleton correlates with the different soft tissue analysis widely available today. This study seeks to establish an average base on which clinicians can treat people according to their cultural esthetic perceptions. Previous reported studies only evaluate small numbers of populations and it is well known that different races and …

Retention Of Cad/Cam Crowns Luted With A Novel Biomimetic Cement, Nan Xiang

All ETDs from UAB

Objectives: To measure the tensile strength of e.max copings cemented with resin, calcium silicate and calcium phosphate cements following thermocycling. Methods: 40 extracted non-carious mandibular premolar teeth were examined and selected using Keyence microscope for no carious cracks etc.were mounted in acrylic. The teeth were placed in a lathe and prepared to uniform dimensions (22° total taper) using a flat-end tapered diamond bur (846.11.025HP, Brasseler) and a 3mm preparation height. The surface area of the prepared surface was calculated with digital microscopy. The teeth were scanned with a Cerec 3 (Sirona) digital scanner. E.max crowns were milled using Cerec 3 …

Three-Dimensional Facial Morphological Changes From Adolescence To Adulthood In Caucasian And African American Populations, Matthew Davis

All ETDs from UAB

The purpose of this cross sectional retrospective study was to use three dimensional surface imaging to determine gender dimorphism and facial morphological changes from adolescence to adulthood in African American and Caucasian populations. Materials and Methods: Three-dimensional images were captured using a laser scanner (Minolta Vivid VI900) and a stereophotogrammatic camera system (3dMDfaceTM). The total sample size included 371 subjects, including the following: 107 African-American adolescents 10–13 years of age, 100 African-American adults 19–30 years of age, 64 Caucasian adolescents 10–13 years of age, and 100 Caucasian adults 18–30 years of age. All subjects had normal body mass index, no …

Effect Of Margin Design On Fracture Strength Of Zirconia Crown, Eleni Voltidi

All ETDs from UAB

Purpose: To compare the fracture load of monolithic Zirconia crowns and E-max crowns with different margin designs and to create a guideline for margin design for monolithic Zirconia crowns. Methods: Digital design of prep maxillary molar tooth was performed with TOC 20 degrees and occlusal reduction 1 mm and axial reduction 1 mm and two different margin designs (group 1: Shoulder 0.8mm group 2: Light Chamfer 0.3mm). Dies were milled using Ultra Crystal material. Monolithic Zirconia crowns were milled (n=9 in group 1 and n=8 in group 2). Crowns were cemented with Rely X luting Plus. The specimens were stored …

Retentive Strength At The Zirconia Implant Abutment And Titanium Base Interface With Different Surface Treatments, Celin Arce

All ETDs from UAB

Screw-retained zirconia implant crowns with an internal titanium base have favorable mechanical properties compared to single piece zirconia implant crowns; however, they require adequate bonding between the zirconia crown and the titanium base. This study measures the retention between a titanium base and a full contour zirconia implant crown following different surface treatments of their bonded surfaces. Full contour zirconia implant crowns were fabricated to fit a 3.5mm titanium base. The crowns were bonded to the titanium bases following 4 protocols (n=15): no surface treatment (Group 1), MDP-primer on the intaglio of crown and exterior of base (Group 2), alumina …

Capacity Of The 3m True Definition Scanner To Make Repeatable Impressions Depending On Placement Of Margins In Relation To Gingival Height., Ricardo Jose Galindo Ramirez

All ETDs from UAB

Purpose: To determine the precision and accuracy of the True Definition Scanner (3M) (TDS) to capture margins at different gingival heights. Materials and Methods: A typodont with soft gingiva and removable indexed Ivorine® teeth was used. Tooth #19 was prepared to fit an all-ceramic crown with a chamfer margin. Spacers placed beneath the prepared tooth elevated #19 in the typodont and controlled the tooth margin height relative to the gingival margin. The TDS was used as an intraoral scanner. A total of 50 scans were made with 5 groups of 10 scans each. In Group 1 (control) the prepared tooth …

16s Rrna Gene Sequencing To Evaluate The Effects Of Six Commonly Prescribed Antibiotics, Kendall Slaton

All ETDs from UAB

16s rrna gene sequencing to evaluate the effects of six commonly prescribed antibiotics kendall slaton, dmd dentistry abstract introduction: the rapid antibiotic sensitivity test (rast) is a novel in-office culture and sensitivity system for endodontic infections. the purpose of this research was to validate the rast system as a viable, in-office alternative to antibiotic sensitivity testing using turbidity, to determine antibiotic sensitivities of endodontic infections. methods: aspirates were taken from the root canals of nine necrotic human teeth at the initiation of root canal therapy. these samples were cultured in the rast medium and antibiotic sensitivity to six antibiotics was …

J Mich Dent Assoc Jan 2016

The Journal of the Michigan Dental Association

Archival issues of the Journal of the Michigan Dental Association may include reports on the activities of the association and its members, clinical articles, information on legal and ethical practice considerations, and perspectives of interest to MDA members and those in the oral health profession.

Prevalence Of Dental Caries In Mexican-American Children And Adolescents Attending Rawlings Pediatric Dental Clinic In El Paso, Texas, Andrea Aguila

Open Access Theses & Dissertations

Abstract

Background and significance: Dental caries is the most common infectious disease in childhood, causing negative long and short term effects in a child’s life. Children living in poverty are twice as likely to be affected by dental caries compared to those living above the poverty level. Of this poverty group, Mexican-American children are the most affected. In the US-Mexico border communities 83% of the population is Hispanic with the majority of them being of Mexican descent, and 30% of those live in poverty. The United States Mexico border is also characterized by a rapid population growth, high unemployment rates, …

Vital Pulp Therapy Survivability Based On Radiographic Depth Of Caries, Aaron T. Schmick

Theses and Dissertations

Purpose: The purpose of this retrospective chart review was to determine if the survival of two methods of vital pulp therapy (VPT) were influenced by the pre-operative radiographic depth and location of caries. Methods: Electronic patient records (axiUm®) that contained the procedure codes D3120, Indirect Pulp Therapy (IPT), or D3220, Therapeutic Pulpotomy (TP), were queried. Qualifying charts’ pre-operative and post-operative radiographs were viewed in MiPACS® by two raters. Visit records were queried again to identify any other treatment failures. Results: A total of 568 primary molars met the eligibility criteria. There was a difference in survival depending upon the treatment …

The Effectiveness Of A Preventive Recall Strategy In Children Following Dental Rehabilitation Under General Anesthesia, Amanda Kerns Dr.

Theses and Dissertations

Abstract

THE EFFECTIVENESS OF A PREVENTIVE RECALL STRATEGY IN CHILDREN FOLLOWING DENTAL REHABILITATION UNDER GENERAL ANESTHESIA

By Amanda Kerns, DDS

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, 2016

Thesis Advisor: Elizabeth Berry, DDS, MPH, MSD

Vice Chair, Assistant Professor, Department of Pediatric Dentistry

Purpose: This was a prospective randomized controlled trial assessing the impact of a preventive strategy following full-mouth dental rehabilitation (FMDR) in children with early childhood dental caries.

Methods: 130 patients completed FMDR and were included in the analysis. …

An In-Vitro Comparison Of Bond Quality Using A Novel Flash-Free Adhesive System With Metal Brackets, Joseph Kevin Ryan

Student Theses, Dissertations and Capstones

Introduction: 3M Unitek (2724 Peck Rd, Monrovia, CA 91016) has recently released a new adhesive system labeled APCTM Flash-Free (APCTM FF) that pledges to eliminate flash removal from the orthodontic bracket bonding process. The company states that the bond strength of this new system is comparable to other adhesive systems such as APCTM PLUS. The purpose of this study was to evaluate the bond quality of APCTM FF by measuring excess adhesive, shear bond strength (SBS), microleakage penetration and adhesive remnant index (ARI) compared to APCTM PLUS. Methods: Eighty brackets were bonded on freshly extracted bovine permanent mandibular incisors as …

Comparison Of Resistance To Sliding Between Brackets And Archwires Utilizing Various Ligature Materials, Jagdesh Dudani

Student Theses, Dissertations and Capstones

Objectives: The purpose of this study was to investigate the association between ligature material and frictional force created during orthodontic cuspid retraction. Maximum static and mean kinetic frictional resistance between conventional metallic orthodontic appliances and esthetic orthodontic appliances will be compared as well. Background: The use of ceramic brackets in conjunction with coated archwires and ligatures as an alternative to conventional stainless steel appliances has increased in response to the demand for more esthetic orthodontic appliances. Esthetic appliances are associated with increased frictional forces and therefore thought to slow the orthodontic treatment. Knowledge of frictional forces generated within various orthodontic …

A Comparative Evaluation Of Endodontic Irrigation Methods For Removal Of The Smear Layer, Ramzi Walid Alhashimi

Student Theses, Dissertations and Capstones

The purpose of this in vitro study is to compare the effect of various irrigation systems on smear layer removal in curved root canals. Root canal irrigation plays an important role in the debridement and disinfection of the root canal system. It has been well documented that the flushing component of the irrigants is as important as the tissue dissolving capability. Therefore, the efficacy of the irrigant might also be influenced by the method by which it is introduced. Fifty-one recently extracted molar teeth with root curvatures of more than 30° were selected according to Schneider's method. The teeth were …

Effect Of Ph And Recharge Protocol On Fluoride Release From Orthodontic Band Adhesives, Erica Kader

Student Theses, Dissertations and Capstones

Objective: This study evaluated the release of fluoride from orthodontic band adhesives before and after exposure to fluoride varnish (FV), MI Paste (MIP), MI Paste Plus (MIPP), or no application, in neutral and acidic solutions. Background: White spot lesions (WSLs) occur in 73% of orthodontic patients. WSLs occur as a result of plaque accumulation, which leads to increased acidity of the oral cavity and subsequent enamel demineralization. Topical fluoride is frequently used as therapy for WSLs, in the form of toothpaste, mouth-rinse and varnish. In an effort to reduce demineralization around fixed appliances, fluoride-releasing adhesives have been employed, including glass …

Tooth Borne Anchorage: A Comparative Analysis, Shane Hodson

Student Theses, Dissertations and Capstones

Objective: The purpose of this study was to compare two anchorage modalities. Differential mass and differential moments were compared for their anchorage effectiveness in the sagittal and vertical dimensions. Class I patients with maximum anchorage requirements and treated with four first premolar extractions were selected. Background: Due to a severe combination of crowding, incisor proclination and protrusion, and procumbency of the lips, certain patients require extractions and maximum anchorage in orthodontic treatment.8 Two tooth borne anchorage modalities, differential mass and differential moments, have been shown to be able to achieve maximum anchorage requirements.5, 7 Methods: The available digital records of …

Comparison Of The Microgap Between Titanium And Modified Zirconia Abutments After Cyclic Loading: A Pilot Study, Serafeim Kallithrakas

Student Theses, Dissertations and Capstones

Comparison of the microgap between titanium and modified zirconia abutments after cyclic loading: A pilot study Purpose: Dental implants have been a common treatment modality for the replacement of missing teeth. Dental abutment is the implant component that connects the implant fixture to the restoration. Many studies have evaluated the mechanical properties and biological behavior of titanium and zirconia abutments. Recently, a modified zirconia abutment, consisting of a titanium insert in the interface with the implant fixture, was developed. The purpose of this study is to compare the microgap between CAD/CAM titanium abutments and CAD/CAM modified zirconia abutments after cyclic …

Impact Of Gastric Acid Induced Surface Changes On Mechanical Behavior And Optical Characteristics Of Dental Ceramics, Aditi Kulkarni

Student Theses, Dissertations and Capstones

Objective. This study was conducted to test the impact of exposure to artificial gastric acid combined with toothbrush abrasion on the properties of dental ceramics. Earlier research has indicated that immersion in artificial gastric acid increased surface roughness of dental ceramics. However, the combined effect of acid immersion and toothbrush abrasion and the impact of increased surface roughness on mechanical strength and optical properties has not been studied. Methods. Three commercially available ceramics were chosen for this study: feldspathic porcelain, lithium disilicate glass ceramic, monolithic zirconium oxide. The specimens (10×1 mm discs) were cut, thermally treated as required and polished. …

Accuracy And Consistency Of Preformed Orthodontic Arch Wires And The Effect Of Energy Drinks, Caroline Albea

Student Theses, Dissertations and Capstones

Introduction: Selection of the proper arch wire requires a thorough knowledge and understanding of the mechanical properties of wires as well as the system being used. Even with careful selection, orthodontists may experience different results due to the inaccuracy of the stated wire dimensions. Previous studies by Melling et al. have shown nickel titanium, stainless steel, and chrome-cobalt arch wires to be thinner than their marketed values.1 However, the literature is lacking information regarding (1) accuracy of the currently available orthodontic arch wires and (2) the consistency of the arch wire size. Orthodontic wires are also exposed to various chemical …

Clinical, Microbiological And Radiographic Comparison Of Two Treatment Strategies Of Peri-Implantitis, Genevieve Payne

Student Theses, Dissertations and Capstones

Dental implants have revolutionized the world of dentistry since their discovery by Branemark (5). Millions of dental implants are being placed in the United States every year. Dental implants are the best option for many people to replace missing teeth in a predictable fashion. In spite of the high success and survival rates of dental implants, complications and failures can occur. Peri-implantitis generates an inflammatory response that involves both soft tissue inflammation and progressive loss of supporting bone beyond biologic remodelling (AAP consensus paper 2013 (2)). A recent meta-analysis by Decks in 2016 (13) reported the prevalence of peri-implantitis to …