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Articles 1 - 30 of 296
Full-Text Articles in Medicine and Health Sciences
Eaat4-Dependent Effects On Glutamatergic Signaling In The Cerebellar Molecular Layer, Christopher Chen
Eaat4-Dependent Effects On Glutamatergic Signaling In The Cerebellar Molecular Layer, Christopher Chen
Dissertations (1934 -)
Glutamatergic signaling is fundamental to human behavior and its dysfunction is implicated in a wide range of neurological and neurodegenerative disorders. Excitatory amino-acid transporters (EAATs) – of which four primary subtypes (EAAT1, EAAT2, EAAT3, and EAAT4) exist in the human brain – are primary regulators of glutamate signaling. Endogenously-expressed at either low (EAAT4-low) or high (EAAT4-high) concentration in cerebellar Purkinje cells, EAAT4 has been shown to regulate Purkinje cell activity in the cerebellar molecular layer. However, differences in glutamatergic signaling at the circuit and single-synaptic levels in EAAT4-low and EAAT4-high regions are poorly understood. To characterize EAAT4-specific effects on excitatory …
Eaat4-Dependent Effects On Glutamatergic Signaling In The Cerebellar Molecular Layer, Christopher Chen
Eaat4-Dependent Effects On Glutamatergic Signaling In The Cerebellar Molecular Layer, Christopher Chen
Dissertations (1934 -)
Glutamatergic signaling is fundamental to human behavior and its dysfunction is implicated in a wide range of neurological and neurodegenerative disorders. Excitatory amino-acid transporters (EAATs) – of which four primary subtypes (EAAT1, EAAT2, EAAT3, and EAAT4) exist in the human brain – are primary regulators of glutamate signaling. Endogenously-expressed at either low (EAAT4-low) or high (EAAT4-high) concentration in cerebellar Purkinje cells, EAAT4 has been shown to regulate Purkinje cell activity in the cerebellar molecular layer. However, differences in glutamatergic signaling at the circuit and single-synaptic levels in EAAT4-low and EAAT4-high regions are poorly understood. To characterize EAAT4-specific effects on excitatory …
Situation Awareness Preparation And Prebriefing: Fostering The Cognitve Processes Of Thinking Like A Nurse In Simulation, Amanda Lynn Potter
Situation Awareness Preparation And Prebriefing: Fostering The Cognitve Processes Of Thinking Like A Nurse In Simulation, Amanda Lynn Potter
Dissertations (1934 -)
Situation awareness (SA) is linked with actionable decision-making and clinical judgment in nursing practice. The cognitive processes used in developing SA, outlined in Endsley’s (1995) model, is the framework underpinning this study and are interwoven into the National Council of State Boards of Nursing Clinical Judgment Measurement Model (NCJMM). Cultivating these cognitive processes through prebriefing and simulation designed to intentionally develop SA, is a recommended practice currently seen in aviation and military training. There is a lack of vigorous research testing whether a specific intervention during clinical simulation can develop SA in nursing students. In addition, fostering SA in the …
A Computational Fluid Dynamics Analysis Comparing Irrigation Within Complex Root Canal Anatomy, Madeleinne Fern
A Computational Fluid Dynamics Analysis Comparing Irrigation Within Complex Root Canal Anatomy, Madeleinne Fern
Master's Theses (2009 -)
Objectives: The aim of this study was to compare fluid dynamics in complex root canal systems shaped with minimally invasive versus progressively tapered file systems using single and double side-vented irrigation tips at different flowrates. Methods: Two identical, plastic mandibular molars were instrumented with minimally invasive and progressive file systems and scanned via micro-computed tomography. A computational fluid dynamics model was generated and enhanced with accessory canals and isthmus in the distal and mesial roots, respectively. The model replicated irrigation within complex canal anatomy using both a single and double side-vented, 30-gauge irrigation tip at four flowrates: 0.05, 0.10, 0.15 …
Impact Of Learning-Style-Based Education On Student Performance And Perception In Preclinical Endodontics: Part Ii, Rebecca Flaugher
Impact Of Learning-Style-Based Education On Student Performance And Perception In Preclinical Endodontics: Part Ii, Rebecca Flaugher
Master's Theses (2009 -)
Objectives: This study aimed to investigate if providing supplemental learning materials aligned to students’ learning modes is equally beneficial among all modes both subjectively and objectively. Methods: IRB approval was obtained (Approval #HR-3746). Second-year dental students (n=92) enrolled in Preclinical Endodontics took Kolb Experiential Learning Profile (KELP) questionnaire to determine their learning mode: Abstract Conceptualization (AC), Active Experimentation (AE), Reflective Observation (RO), or Concrete Experience (CE). Students were assigned into groups corresponding to their learning mode. Students performed non-surgical root canal treatment (NSRCT) on a #9 typodont tooth and were graded to determine baseline performance (Project 1). Students were then …
Performance And Preference Of Rotary Files By Pre-Doctoral Dental Students At Marquette School Of Dentistry, Morgan Elizabeth Mccall
Performance And Preference Of Rotary Files By Pre-Doctoral Dental Students At Marquette School Of Dentistry, Morgan Elizabeth Mccall
Master's Theses (2009 -)
Introduction: The aim of this study was twofold: 1) objectively evaluate root canal shaping and procedural mishaps using different NiTi rotary systems in the hands of unexperienced pre-doctoral dental students; 2) to gain an understanding of which rotary file system students subjectively prefer. Methods: Second year dental students (n=94) enrolled in preclinical endodontics received instructional videos and didactic lectures on the use of three different rotary filing systems: Vortex Blue, EndoSequence, and ProTaper Universal. Students completed root canal treatment using each file system on 3D printed premolars. The quantitative evaluation was completed after each project by two calibrated examiners using …
In Vitro Comparison Of Cellular Cytoxicity Of Conventional Vs. Cad/Cam Denture Base Materials, Zainab Hill Albasry
In Vitro Comparison Of Cellular Cytoxicity Of Conventional Vs. Cad/Cam Denture Base Materials, Zainab Hill Albasry
Master's Theses (2009 -)
Aim: Adverse reactions and local irritation of the oral mucosa to prostheses constructed from PMMA include allergic response, erythema, and a burning sensation of the tongue and mucosal tissues. Evidence on the cytotoxic effects of digitally manufactured denture base materials remains scarce. The aim of this study was to evaluate and compare the cytotoxic effects of CAD/CAM fabricated denture bases versus conventionally heat-cured acrylic resin materials. Materials and Methods: In total, 75 disks of five different denture resin materials – 15 disks per group were prepared: Ivocap (group 1; control), Ivotion denture base (group 2), Lucitone 3D denture base (group …
Application Of The Social Determinants Of Health To Geriatric Patients By Nurse Practitioner Students, Theresa Marie Gruenke Schnable
Application Of The Social Determinants Of Health To Geriatric Patients By Nurse Practitioner Students, Theresa Marie Gruenke Schnable
Dissertations (1934 -)
ABSTRACT APPLICATION OF THE SOCIAL DETERMINANTS OF HEALTH TO GERIATRIC PATIENTS BY NURSE PRACTITIONER STUDENTS Patient outcomes are influenced by the social determinants of health (SDOH), which influence differing exposures to opportunities or health risks. Holistic care of geriatric patients includes considering SDOH in patient assessment, diagnosis, and care delivery. Understanding how NP students care for geriatric patients using a SDOH lens provides insight into their practice behaviors and helps educators understand how to strengthen NP programs to achieve better patient outcomes and advance health equity for the geriatric population. The purpose of this study was to describe how NP …
Why We Work: Exploring The Relationships Between Work Rewards, Burnout, And Intention To Leave For Professional Nurses, Jacqueline Christianson
Why We Work: Exploring The Relationships Between Work Rewards, Burnout, And Intention To Leave For Professional Nurses, Jacqueline Christianson
Dissertations (1934 -)
Nurse burnout leads to attrition from hospital nursing positions and the nursing profession prior to typical retirement age. Yet some nurses choose to stay despite burnout. Previous research indicates that nurses stay due to the rewards they receive from work but the relationships between different types of work rewards, work-related burnout, and intention to leave are poorly described. The ability to implement or execute altruistic behaviors may also represent an under-recognized work reward. Thus, the purpose of this study is to investigate the relationships between work rewards, work-related burnout, and intention to leave nursing positions and the nursing profession and …
Maxillary And Mandibular Incisor And Molar Dentoalveolar Heights In Untreated Subjects Presenting Class I And Class Ii Malocclusion, Samantha Zavada Cardinal
Maxillary And Mandibular Incisor And Molar Dentoalveolar Heights In Untreated Subjects Presenting Class I And Class Ii Malocclusion, Samantha Zavada Cardinal
Master's Theses (2009 -)
Objective : Class II malocclusion has been extensively studied, however there are many unanswered questions. This study analyzed the difference in incisor and molar dentoalveolar heights of untreated subjects presenting with Class I and Class II malocclusion. Dentialveolar heights are an aspect of the craniofacial complex that changes with growth and development and are manipulated by orthodontists. These changes hold important clinical implications for the development, maintenance and treatment of malocclusions. Methods : A sample of 96 untreated Class I and Class II subjects, with a total of 611 cephalograms was drawn from the archives of the University of Michigan …
Alveolar Bone Remodeling In Response To Orthodontic Tooth Movement, Matthew Raymond Mcgrady
Alveolar Bone Remodeling In Response To Orthodontic Tooth Movement, Matthew Raymond Mcgrady
Master's Theses (2009 -)
Objective: Dental protrusion and retrusion are common malocclusions in clinical orthodontics. When teeth are moved orthodontically, the alveolar bone surrounding the teeth remodels. In the past, incisor retraction-associated alveolar bone remodeling has been studied. However, less is known about the alveolar bone remodeling after incisors are proclined. This study aimed to assess the changes in alveolar bone thickness after proclination of maxillary incisors. The null hypothesis was that there is no difference in the surrounding alveolar bone thickness after orthodontic tooth movement. Materials and Methods: Patients were selected under the inclusion criteria of moderate-to-severe bimaxillary dental retrusion (U1-SN < 97°, L1-MP < 88.0°), absence of craniofacial anomalies, non-extraction, absence of missing teeth, with quality pre-and post-treatment lateral cephalometric images. Nineteen patients (10 males, 9 females; mean age 14.7 years) were selected, and their pre-treatment and post-treatment lateral cephalograms were digitally traced using a customized cephalometric analysis to compare changes in labial and lingual alveolar bone thickness (ABT) after orthodontic treatment. A two-sample t-test with R statistical software version 4.1.2 was used to measure the differences between the pre- and post-treatment cephalometric measurements. A p value less than 0.05 was considered statistically significant. Results: According to the SN-7° measurement method, ABT increased at the labial(b) SN-7 (0.27mm ± 0.70; p<0.05) and U1 labial(c) SN-7 (0.79mm ± 1.56; p<0.05) levels; however, ABT decreased at the U1 lingual (c) SN-7 (1.13mm ± 1.35; p<0.05) level. According to the perpendicular of the long axis of U1 root measurement method, ABT increased at the U1 labial(c) ⊥U1 (0.55mm ± 1.35; p<0.05) level while ABT decreased at the U1 lingual (b) ⊥U1 (0.79mm ± 1.03; p<0.05) and U1 lingual (c) ⊥U1 (1.61mm ±1.39; p<0.05) levels. Statistically significant changes were also found in post-treatment incisor angulation U1-SN° (8.05° ± 8.25; p<0.05), U1 – NA° (7.44° ± 8.08; p < 0.05) and post-treatment incisor position U1 – NA (mm) (1.64mm ± 2.63; p<0.05). Conclusion:The null hypothesis was rejected based on our results. There are statistically significant changes to the labial and lingual alveolar bone (ABT) after proclination of the maxillary incisors. Our data support previous findings in orthodontics literature. Further studies should be conducted that can employ larger sample sizes with imaging methods that overcome the limitations of conventional two-dimensional imaging.
The Influence Of Peri-Cervical Dentin Conservation On The Propagation Of Cracks In Mandibular Molars, Hassanain Zaheer
The Influence Of Peri-Cervical Dentin Conservation On The Propagation Of Cracks In Mandibular Molars, Hassanain Zaheer
Master's Theses (2009 -)
Introduction: The objective of this study was to investigate the effect of peri-cervical dentin conservation during root canal treatment on the longitudinal propagation of cracks, utilizing the finite element method. Methods: Two 3D printed mandibular molars were subjected to a simulated root canal therapy protocol. The teeth were divided into two test groups: Group 1: Instrumented with using Protaper Gold (PTG) rotary files. Group 2: Instrumented with using TruNatomy. Each access was restored with composite at the level of the CEJ to the occlusal surface. The two teeth were digitized using a high-resolution micro–computed tomographic scan to create 3-D models …
A Digital Assessment Of Centric Relation Precision, Christine Roenitz
A Digital Assessment Of Centric Relation Precision, Christine Roenitz
Master's Theses (2009 -)
Objective: Recording the centric relation position is a critical step in diagnosis and treatment in prosthodontics. There are various methods that can be used to position a patient’s mandible into centric relation. Among these are: swallow technique (unguided closure), chin-point guidance, and bimanual manipulation. The precision of these methods has previously been studied by traditional methods. Data is lacking on the precision of virtual recordings of these methods taken by an intraoral scanner. The purpose of this study was to assess the digital precision of the swallow, chin-point guidance, and bimanual manipulation centric relation positioning techniques.Materials and Methods: Ten participants …
The Influence Of Peri-Cervical Dentin Conservation On The Propagation Of Cracks In Mandibular Molars, Hassanain Zaheer
The Influence Of Peri-Cervical Dentin Conservation On The Propagation Of Cracks In Mandibular Molars, Hassanain Zaheer
Master's Theses (1922-2009) Access restricted to Marquette Campus
Introduction: The objective of this study was to investigate the effect of peri-cervical dentin conservation during root canal treatment on the longitudinal propagation of cracks, utilizing the finite element method. Methods: Two 3D printed mandibular molars were subjected to a simulated root canal therapy protocol. The teeth were divided into two test groups: Group 1: Instrumented with using Protaper Gold (PTG) rotary files. Group 2: Instrumented with using TruNatomy. Each access was restored with composite at the level of the CEJ to the occlusal surface. The two teeth were digitized using a high-resolution micro–computed tomographic scan to create 3-D models …
Generalized Joint Hypermobility And Lower Extremity Musculoskeletal Biomechanics In Female Athletes, Christopher F. Geiser
Generalized Joint Hypermobility And Lower Extremity Musculoskeletal Biomechanics In Female Athletes, Christopher F. Geiser
Dissertations (1934 -)
Generalized Joint Hypermobility (GJH), in lay terms being “double-jointed”, affects 5 to 43 percent of the general population. In severe forms, GJH impacts systems across the body, with cardiovascular, ocular, and musculoskeletal effects that can be quite debilitating. Most of the literature examining GJH is in this severely impacted group of people. However less severe forms of GJH are present in the athlete population in the same proportions, and athletes with GJH are more likely to be injured while participating in activities. They also experience greater time-loss injuries while participating in athletic activities. The movement biomechanics of those with severe …
The Influence Of The Digitization Method On The Assessment Of Accuracy And Reliability Of Implant Placements, Ajitesh Singh
The Influence Of The Digitization Method On The Assessment Of Accuracy And Reliability Of Implant Placements, Ajitesh Singh
Master's Theses (2009 -)
Purpose: Studies investigating the accuracy of implant placement are utilizing different methods to digitize the post-operative implant position to compare it with the planned reference position. This study aimed to compare the influence on radiographic and digital methods in the accuracy of static computer-assisted and free hand implant placement.Methods: In total, n=40 implants were placed either fully guided (n=20) or free-handed (n=20) in standardized mandible replicas. A static surgical guide was planned for the fully guided surgery group (FG) for an implant at the lower right first molar site and 3D printed. In the free-hand group (FH) the implant surgery …
Immediate Postoperative Dimensional Changes Following Implant Placement, Juan Felipe Valencia Rincon
Immediate Postoperative Dimensional Changes Following Implant Placement, Juan Felipe Valencia Rincon
Master's Theses (2009 -)
Objective: Hard tissue outcomes after implant placement have been well documented. However, there is scarce evidence on immediate soft tissue and patient-centered outcomes. The aim of this prospective study is to quantify post-implant placement edema and to correlate it with oral health-related quality of life. Methods: Patients undergoing a standardized two-stage implant placement at a single tooth-bound site were recruited (n=26; 54.13.3 years, 14 males). Soft tissue edema was recorded by using intraoral scans immediately pre- (PS) and post-operatively (IP), at 2 (2D), 7 (7D) and 14 days (14D) and 2 months (2M). After scan registration, ridge width, maximum height, …
Mechanisms Of The Age-Related Power Reduction In The Knee Extensor Muscles Of Men And Women, David Wrucke
Mechanisms Of The Age-Related Power Reduction In The Knee Extensor Muscles Of Men And Women, David Wrucke
Master's Theses (2009 -)
The mechanisms for the loss in limb muscle power output in old (60-79 years) and very old adults (≥80 years) and whether these mechanisms differ between older men and women are not well-understood. The aims of the thesis are to 1) compare peak power output of the knee extensor muscles between young, old, and very old adults and 2) determine the physiological mechanisms for the age-related loss of power in men compared with women. 31 young (22.9±3.0 years, 16 men), 83 old (70.4±4.9 years, 44 men), and 16 very old adults (85.8±4.2 years, 7 men) performed maximal isokinetic contractions at …
Examining Relationships Among Nursing Students' Views Of Suffering, Positive Thinking, And Professional Quality Of Life, Ruth Anne Engbers
Examining Relationships Among Nursing Students' Views Of Suffering, Positive Thinking, And Professional Quality Of Life, Ruth Anne Engbers
Dissertations (1934 -)
Despite the association between nursing students’ exposure to suffering and the development of compassion fatigue, little research exists regarding promoting nursing students’ adaptation to caring for suffering patients and families. As a possible nursing shortage is projected, it is imperative to better understand the factors that impact this adaptation to ensure that nursing students can successfully transition into their nursing role. Although beliefs about the reasons for human suffering affect their ability to cope with their exposure to the suffering of others, there is no empirical data regarding nursing students’ views of suffering. Nursing students also report using positive reframing …
Activated Charcoal Versus A Chemical Whitening Agent: Effect On Human Enamel, Hien Thai Doan
Activated Charcoal Versus A Chemical Whitening Agent: Effect On Human Enamel, Hien Thai Doan
Master's Theses (2009 -)
Objective: For many years, the conventional method to achieve a white smile has been chemical regimens such as peroxide compounds. Previous studies suggest risks associated with chemical procedures, so many are seeking out alternative options such as utilizing activated charcoal. Since this new method is rapidly trending, there have not been many scientific studies on how utilizing activated charcoal can affect the mechanical/physical properties of tooth structure. The primary objective of this study was to investigate the effect of activated charcoal on enamel’s mechanical/physical properties and compare it to a conventional tooth whitening method (carbamide peroxide). Materials and Methods: Extracted …
The Accuracy And Sensitivity Of Abo Electronic Cast Radiographic Program Orthoshare 360 Compared To Manual Measurements, Lisa Nguyen
Master's Theses (2009 -)
Objective: The objective of this study was to assess the accuracy, validity, and reliability of measurements obtained by MotionView's Ortho Share 360 program compared to traditional manual measurements of 3D printed models using a standardized ABO measuring gauge. In detail, the study aimed to evaluate the difference in total ABO Cast Radiographic-Evaluation (CRE) score and individual differences among six ABO CRE parameters. The null hypothesis is that there are no statistically different scores between digital and manual measurements. Methods: 33 samples were measured based on standardized parameters determined by the ABO. The first measurements were obtained manually using ABO measuring …
Mechanism Of Mechanical Vibration In Enhancing Orthodontic Retention- Analysis Of Global Gene Expression, Shuwei Wang
Mechanism Of Mechanical Vibration In Enhancing Orthodontic Retention- Analysis Of Global Gene Expression, Shuwei Wang
Master's Theses (2009 -)
Introduction: Low-magnitude, high-frequency (LMHF) mechanical vibration has been proposed as a possible adjunctive retention method after orthodontic treatment. In this study, we explored the mechanism of using LMHF vibration to improve bone formation during retention phase. We aimed to provide insight of global gene expression and cellular activities of PDL cells under tension, as well as identify novel biomarkers for induced osteogenesis by using LMHF mechanical vibration as adjunct tool in retention phase. Materials and Methods: Human PDL cells (hPDLCs) were seeded in 6-well FLEXCELL culture plates. The wells were assigned to four experimental groups as control, stretching (ST), vibration …
Evaluation Of Damon Psl And Conventional Mbt Brackets In Leveling And Alignment Efficiency, Jacob Beckstrand
Evaluation Of Damon Psl And Conventional Mbt Brackets In Leveling And Alignment Efficiency, Jacob Beckstrand
Master's Theses (2009 -)
Objective: Ormco has proposed that the low-friction design of their self-ligation brackets allows for more efficient alignment of crowded teeth with less incisor proclination and faster treatment times compared to conventional MBT bracket systems. The purpose of this study is to examine the hypothesis that there is no difference between Damon PSL and conventional MBT brackets in factors related to leveling and alignment in-vitro. Methods:Damon Q2 .022” slot brackets and 3M Unitek .022” slot MBT brackets were bonded to 2 sets of typodont teeth. Typodont teeth were placed into 8 upper and lower Class I crowding wax forms (Kilgore, USA) …
Color Characterization Of Color Changing Orthodontic Adhesives, Megan Fried
Color Characterization Of Color Changing Orthodontic Adhesives, Megan Fried
Master's Theses (2009 -)
Objective:A popular product to facilitate removal of excess adhesive during bonding of orthodontic appliances is a color changing adhesive. Before polymerization, these materials are a bright color but upon curing, manufacturers claim they become translucent. After debonding, there is often resin embedded within the enamel, so the appearance of these materials after polymerization can affect the esthetics of a patient’s dentition. The purpose of this study was to analyze the color characteristics of various orthodontic color changing adhesives and determine if there is a significant difference in color changing capabilities and in translucency after polymerization between products. Methods:Grengloo and Blugloo …
Autoignition And Sooting Characteristics Of Iso-Octane And Ethanol In An Optical Rapid Compression Machine, Richard John Kempf
Autoignition And Sooting Characteristics Of Iso-Octane And Ethanol In An Optical Rapid Compression Machine, Richard John Kempf
Master's Theses (2009 -)
To effectively reduce particulate emissions and maximize the effectiveness of renewable fuels entering the industrial and transportation markets, an accurate understanding of the combustion characteristics of these fuels is a necessary undertaking. Typical engines used in the heavy-duty engine industry primarily rely on mixing-controlled combustion, which has the potential to produce soot under locally rich combustion conditions. A rapid compression machine (RCM) is an experimental reaction vessel used to investigate the ignition and pollutant behaviors of fuels at compressed conditions relevant to engine studies. In this study, an RCM has been prepared with line-of-sight optical accessibility such that a laser …
The Effect Of Tray Design And Impression Material Consistencies On Accuracy Of Complete Arch Implant Supported Fixed Dental Prostheses Master Casts, Lujain Kurdi
Master's Theses (2009 -)
Purpose of this Study: The purpose of this study is to determine the accuracy and precision of complete arch implant supported fixed dental prosthesis impressions made with a low viscosity PVS while supporting the splinted impression copings with heavy viscosity PVS on a reference model simulating an all-on-4 prosthesis using both stock and custom trays. Material and Methods: A model was scanned to act as the reference model. The splinting device and custom tray were printed using FormLAb printer and custom resin tray material. Four group were included in the study. Stock tray with and without support and custom tray …
Exploring Relationships Between Depression Self-Stigma And Trust In Primary Care Provider On Willingness To Seek Help, Tana Karenke
Exploring Relationships Between Depression Self-Stigma And Trust In Primary Care Provider On Willingness To Seek Help, Tana Karenke
Dissertations (1934 -)
Depression is a mood disorder characterized by persistent feelings of sadness and/or loss of interest that effects an individual’s ability to carry out day-to-day activities. Depression can diminish one’s social functioning, interpersonal relationships, personal care, and work productivity. Despite the availability of various treatments for depression, roughly 34% of people suffering from depression symptoms do not seek treatment. Significant barriers for seeking help for depression symptoms include the stigma of mental illness and a lack of trust in healthcare providers; however, there is a paucity of research exploring the relationship between mental illness stigma and the role of trust in …
The Impact Of Nutrition Literacy And Neighborhood On Diet Quality In The Mexican Origin Population, Sylvia Pena
The Impact Of Nutrition Literacy And Neighborhood On Diet Quality In The Mexican Origin Population, Sylvia Pena
Dissertations (1934 -)
Introduction: Diet quality is a critical component in achieving optimal health outcomes. A poor diet can lead to various health complications including obesity, heart disease, and diabetes. Hispanic individuals have been found to have higher rates of obesity; therefore, it is critical that variables impacting diet quality be examined in this population. Available literature concerning nutrition literacy, neighborhood and diet quality have not been specific to subgroups of the Hispanic population, therefore, identifying how these factors influence the Mexican origin population is needed. The aim of this dissertation was to better understand the impact of nutrition literacy and neighborhood on …
Influence Of Free-End Distal Extension On The Accuracy Of Guided Implant Placement: An In Vitro Study, Geoffrey Ganzman
Influence Of Free-End Distal Extension On The Accuracy Of Guided Implant Placement: An In Vitro Study, Geoffrey Ganzman
Master's Theses (2009 -)
Purpose: The aim of this study was to evaluate the influence of type of tooth-support (bounded edentulous space versus unbounded edentulous spaces) on the accuracy of fully-guided implant placement using static computer-assisted implant surgery (sCAIS) in partially-dentate patients. Methods: Four different clinical scenarios were simulated; (a) bounded single-tooth edentulous space (BES), and three different free-end distal extensions with (b) unbounded single-tooth edentulous space (UBES1), (c) unbounded two-teeth edentulous space (UBES2), and (d) unbounded three-teeth edentulous space (UBES3). An implant planning software was used to design 3D-printed stereolithographic surgical guides for the respective clinical scenarios. In total n=140 implants with dimensions …
Edge-Chipping And Translucency Comparison Among Lithium Silicate-Based Ceramics, Essa Abdullah Alghamdi
Edge-Chipping And Translucency Comparison Among Lithium Silicate-Based Ceramics, Essa Abdullah Alghamdi
Master's Theses (2009 -)
Purpose: The purpose of this in vitro study was to determine the edge-chipping toughness and the translucency of lithium silicate-based glass ceramics. Materials and Methods: Four lithium silicate/disilicate glass-ceramic materials, IPS e.max CAD and GC Initial LiSi blocks, and two zirconia-lithium silicate glass-ceramic materials, Vita Suprinity and Celtra Duo, were prepared and tested (n=20 specimens/group). Specimens (14 x 12 x 1.5 mm) were sectioned from commercially available chairside computer-aided design/computer-aided manufacturing (CAD-CAM) blocks, fired (if indicated), ground, and polished. Translucency was assessed via a spectrophotometer for each group. For edge chipping, specimens were adhered to a resin bed created in …