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Articles 1 - 30 of 153
Full-Text Articles in Medicine and Health Sciences
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 …
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 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 …
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 …
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 …
Identifying Optimal Composite Resin Depth To Maximize Fracture Resistance When Restoring Immature Endodontically Treated Teeth, David Poe
Master's Theses (2009 -)
Introduction: This study compared stress distribution of an immature central incisor restored with intracanal composite resin placed at different depths. Methods: Five pre-accessed models were prepared, to simulate immature central incisors, and endodontically treated using a mineral trioxide aggregate plug and different amounts of composite resin with gutta-percha in between the composite resin and mineral trioxide aggregate. (Group 1) Composite resin restored from the cemento-enamel junction, (group 2) composite resin restored from 2 mm apical to the cemento-enamel junction, (group 3) composite resin restored from 4 mm apical to the cemento-enamel junction, (group 4) composite resin restored from the mineral …
Associations Between The Movement Of Hard And Soft Tissues After Orthodontic Proclination Of Incisors, Scott Beard
Associations Between The Movement Of Hard And Soft Tissues After Orthodontic Proclination Of Incisors, Scott Beard
Master's Theses (2009 -)
Objective: As orthodontic treatment planning has evolved throughout its history, there has been an increased emphasis on the facial soft tissues. Little has been done to study the effects that proclination of the incisors has on the soft tissue profile. The purpose of this study was to 1) determine if there are significant changes of lip projection and shape with proclination of incisors, and 2) determine if there are significant associations between the movement of the hard and soft tissues after proclination of the incisors. The null hypothesis is that there is no statistically different changes and associations between hard …
Effects Of Fluoride On Corrosion Properties Of Orthodontic Retention Wires, John J. Simindinger
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
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
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
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
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
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 …
Shear Bond Strength Characteristics On Surface Treatment Modalities Of Cad-Cam Resin Based Core Materials, Nikita Sinha
Shear Bond Strength Characteristics On Surface Treatment Modalities Of Cad-Cam Resin Based Core Materials, Nikita Sinha
Master's Theses (2009 -)
Introduction: Innovations in computer aided design and computer aided manufacture (CAD-CAM) have made the manufacture of new restorative and prosthetic materials possible. They have enabled fabrication of complete arch implant supported fixed dental prosthesis (CAISFDP) in metals and polymers a reality. There are several materials which are available to fabricate a CAISFDP and it is important to find biologically, economically and aesthetically viable options for milled, cast and printed metal and non-metal structures. Objectives: The purpose of this in-vitro test was to analyze the shear bond strength of composite to Trilor material for CAISFDP restorations. Material and Methods: A total …
The Influence Of The Operator Experience On The Accuracy Of Implant Placement: An In Vitro Study, Jeffrey Garcia
The Influence Of The Operator Experience On The Accuracy Of Implant Placement: An In Vitro Study, Jeffrey Garcia
Master's Theses (2009 -)
Purpose: The aim of this study is to evaluate the influence of operator experience in the fully guided placement of implants in dentate patients. Methods: Three different providers with different level of experience in implant surgery (unexperienced, moderate experienced = 2 years of experience, and experienced = more than 5 years of experience in implant surgery) placed each n=20 implants fully guided or free hand in identical replicas, produced from a CBCT of a partially edentulous patient case. The achieved implant position was digitized by using a laboratory scanner and compared with the planned position. Trueness (planned versus actual position) …