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Analysis Of Stresses In Mandible And Skull Under Angular Impact, Dr. Shobha E S, Dr. Suresh Nagesh, Dr. H Raghuveer, Mr. Vinay S 2015 Selected Works

Analysis Of Stresses In Mandible And Skull Under Angular Impact, Dr. Shobha E S, Dr. Suresh Nagesh, Dr. H Raghuveer, Mr. Vinay S

Innovative Research Publications IRP India

Finite element analysis has gained a significant attention in the field of biomechanics. The versatility of finite element analysis is the major reason behind its implementation and adoption has made the study of biomechanics much easier and simpler. FEA, as a tool has helped in analyzing the various organs in human body in different loading conditions. Be it Orthopedic,Maxillofacial fractures,Orthodontics, Prosthodontics, hemodynamics, it is finding its applications in all areas of biomechanics. In this paper, one such study has been carried out to understand the behavior of skull and mandible under inclined impacts. Skull is one of the ...


Mechanical Behavior Of Thermo-Responsive Orthodontic Archwire, S. Mullins, M. Bagby, Timothy Norman 2015 Cedarville University

Mechanical Behavior Of Thermo-Responsive Orthodontic Archwire, S. Mullins, M. Bagby, Timothy Norman

Timothy L. Norman, Ph.D.

OBJECTIVES: This investigation was conducted to describe the mechanical behavior of thermo-responsive nitinol archwires in flexure at 5 degrees and 37 degrees C. METHODS: Four same-sized (but different force level) rectangular archwires were examined using a three-point bend test. Samples were tested at 5 degrees and 37 degrees C. Linear regressions were fit to different segments of the load-deflection plots. Regression parameters of the segments and other properties were statistically analyzed. RESULTS: Superelastic behavior was exhibited by all wires tested at 37 degrees but not at 5 degrees C. Permanent deformation was greater at 5 degrees than 37 degrees. The ...


An In Vitro Evaluation Of Commercially Available Disposable Prophylaxis Angles, Caren Barnes, Lisa Fleming, Carl Russell 2015 University of Nebraska Medical Center

An In Vitro Evaluation Of Commercially Available Disposable Prophylaxis Angles, Caren Barnes, Lisa Fleming, Carl Russell

Caren M Barnes

Although a number of manufacturers are marketing disposable prophylaxis angles, no literature exists regarding the mechanical efficacy and efficiency of these products. It was the purpose of this in vitro evaluation to compare and evaluate five brands of commercially available disposable prophylaxis angles for vibration, noise, heat rise, and torque. Random samples of each brand of disposable prophylaxis angle were utilized. Vibration was measured with a height gauge and running motor; noise was measured with a sound meter and heat rise was measured from 68°F on the head and body of the disposable prophylaxis angles, and torque required to ...


The Evolution Of Prophy Paste, Caren Barnes 2015 University of Nebraska Medical Center

The Evolution Of Prophy Paste, Caren Barnes

Caren M Barnes

Dental hygienists have many products to choose from when deciding which prophy paste is best for each patient. To date, the evidence supporting prophy pastes formulated to remineralize enamel or eliminate dentinal hypersensitivity is somewhat unclear. Most of the research has been conducted in vitro among environments that do not accurately simulate clinical conditions. Additional clinical research performed in vivo is needed to provide the evidence base necessary for effective clinical decision making.


Polishing Esthetic Restorative Materiai, Caren Barnes 2015 University of Nebraska Medical Center

Polishing Esthetic Restorative Materiai, Caren Barnes

Caren M Barnes

When esthetic dental restorations are encountered during charting, they should be included in the treatment plan for the specific polishing procedures that are required. If the brand and type of esthetic restoration are known through the patient chart, the polishing procedures and products used should be those recommended by the manufacturer. If not possible, alternative polishing procedures should be used. A cleaning agent containing feldspar and rubber polishing cup can be used on all esthetic restorative materials with no chance of damage to the surface characterization.

The principles for polishing esthetic restorations are the same as for natural teeth. If ...


Shining A New Light On Selective Polishing, Caren Barnes 2015 University of Nebraska Medical Center

Shining A New Light On Selective Polishing, Caren Barnes

Caren M Barnes

The era of selective polishing is over. Polishing is an integral procedure provided by dental hygienists. Patients look forward to the resultant smooth, clean feeling, and dental hygienists must ensure that all patients are polished according to their individual needs—ensuring the safety of their teeth and restorations.


The Management Of Aerosols With Airpolishing Delivery Systems, Caren Barnes 2015 University of Nebraska Medical Center

The Management Of Aerosols With Airpolishing Delivery Systems, Caren Barnes

Caren M Barnes

In summary. aerosol production is inherent with airpolishers. as well as other dental equipment such as handpieces, ultrasonic scalers, and air/water syringes. By practicing prudent infection control techniques and utilizing proper operating techniques, the clinician can continue to enjoy the time-efficient and efficacious benefits of airpolishers, while ensuring a maximum protection from aerosols for the patient and the operator.


An In Vivo Comparison Of Commercially Available Disposable Prophylaxis Angles, Lisa Fleming, Caren Barnes, Carl Russell 2015 University of Alabama

An In Vivo Comparison Of Commercially Available Disposable Prophylaxis Angles, Lisa Fleming, Caren Barnes, Carl Russell

Caren M Barnes

A wide variety of disposable infection control products is being marketed including disposable prophylaxis angles. It was the purpose of this in vivo investigation to evaluate the clinical efficacy of five different brands of commercially available disposable prophylaxis angles. Utilizing a splitmouth design. 11 dental hygienists evaluated disposable prophylaxis angles while completing a routine oral prophylaxis. Fifty samples each of Brahler. Ash/Dentsply, Denticator. and Young Dental angles were compared to a control angle (Teledyne Getz). A questionnaire was completed by each operator following patient treatment (a total of 161 patients was treated). The questionnaire asked questions in which the ...


An In-Depth Look At Air Polishing, Caren Barnes 2015 University of Nebraska Medical Center

An In-Depth Look At Air Polishing, Caren Barnes

Caren M Barnes

Air polishing has been available for four decades, however, the concept is based on a technology invented by Dr. Robert Black in 1945. Dr. Black invented the Air Dent, a device that used compressed air, water, and a highly abrasive powder to eliminate pain from cavity preparation, making anesthesia unnecessary. The Air Dent had numerous problems that could not be overcome, but Dr. Black never gave up on his idea. The technology he invented became the basis of air polishing and was first marketed in 1976. By the late 1970s, air polishing was readily available. Air polishing represents the most ...


Changes In Composite Toxicity Following Exposure To Pulp Capping Materials, Audra Long 2015 Marquette University

Changes In Composite Toxicity Following Exposure To Pulp Capping Materials, Audra Long

Master's Theses (2009 -)

Introduction: Direct pulp capping involves placing a material over the exposed pulp in order to maintain its vitality. For decades, calcium hydroxide (CH) has served as the gold standard for this purpose, but its toxicity to the pulp may negatively impact treatment outcomes. Mineral Trioxide Aggregate (MTA) has become a popular alternative based partly on its excellent biocompatibility. Pulp-capped teeth are often restored with highly toxic composite materials, but the pulp capping material’s ability to alter these toxic effects has never been investigated. The purpose of this in vitro study is to determine the effects of Dycal, a CH-based ...


Mechanical Properties And Patient Perceptions Of Commonly Used Clear Aligner Systems As-Received And After Clinical Use, Lauren Evan Montoure Teske 2015 Marquette University

Mechanical Properties And Patient Perceptions Of Commonly Used Clear Aligner Systems As-Received And After Clinical Use, Lauren Evan Montoure Teske

Master's Theses (2009 -)

Background/Objectives: This study aimed to investigate the viscoelastic properties of two clear aligner systems, Invisalign (Align Technology, Inc, Santa Clara, CA, USA) and Simpli5 (Allesee Orthodontic Appliances, Sturtevant, WI, USA), and determine if there was a difference after use. A survey assessed patients’ perceptions of the aligner material and post-treatment satisfaction. Materials/Methods: Mandibular aligners were collected from two patients after 2-3 weeks of use (n=6). Duplicate, unused aligners were obtained for each patient (n=6). Dynamic mechanical analysis (DMA) characterized the viscoelastic properties of the materials. Three tests were done on separate specimens: frequency scan (0.1-10 ...


Determination Of Dioctyl Phthalate (Dehp) Concentration In Polyvinyl Chloride (Pvc) Plastic Parts Of Toothbrushes, Ghazal Sadeghi, Elham Ghaderian, Anne O'Connor 2015 Cleveland State University

Determination Of Dioctyl Phthalate (Dehp) Concentration In Polyvinyl Chloride (Pvc) Plastic Parts Of Toothbrushes, Ghazal Sadeghi, Elham Ghaderian, Anne O'Connor

The Downtown Review

Phthalates are chemicals that are widely used in daily products and polyvinyl chloride (PVC) plastics, mainly because of their ability to enhance flexibility and durability. The presence of phthalates in various products contributes to the substantial exposure that all consumers may experience. Continuity in phthalate exposure has several side effects, including endocrine disruption, neurological damage, asthma, hormonal imbalances, obesity, infertility, genital defects, and testicular cancer. The purpose of this research experiment was to determine the Dioctyl phthalate (DEHP) concentration of PVC plastic parts of toothbrushes. The method used to conduct the experiment was Gas Chromatography/Mass Spectrometry. The result showed ...


Subgingival Air Polishing In Dentistry, Chelsea T-P. Howell 2015 Western Kentucky University

Subgingival Air Polishing In Dentistry, Chelsea T-P. Howell

Honors College Capstone Experience/Thesis Projects

Modern statistics have shown that periodontal disease is highly prevalent in today’s society. Periodontal disease has detrimental effects to the oral cavity, including: bone less, recession, and tooth mobility. A strong correlation has been linked to the use of the subgingival air polisher on patients with active periodontal disease and the regression of the disease after being treated with the device. This is being compared to traditional hand-scaling beneath the gingiva margin which is less efficient in removing biofilm subgingivally. Recent studies (Petersilka et al.) are confirming this to be true by treating patients with both hand-scaling and the ...


Bone Stimulation Implemented Using The L-Prf Technique Within The Clinical Setting In Kentucky And Tennessee, Kyndall A. Hudson 2015 Western Kentucky University

Bone Stimulation Implemented Using The L-Prf Technique Within The Clinical Setting In Kentucky And Tennessee, Kyndall A. Hudson

Honors College Capstone Experience/Thesis Projects

Leukocyte Platelet Rich Fibrin (L-PRF) is an autologous graft that is obtained from the patient’s blood. This provides a condensed network of fibrin that is saturated with cytokines, growth factors, and platelets. L-PRF speeds up the healing process and also optimizes bone grafting results.

Dental treatment options are expanding and new techniques within the office setting are constantly being developed. Present treatment modalities can assist with the stimulation of tissue formation after dental surgical procedures, leading to various results. The placement of L-PRF provides enhanced healing following specific dental procedures using the patient’s donor tissue; therefore, reducing the ...


Oral Wellness: Using Occupational Therapy To Enhance Oral Hygiene Delivery In Long-Term Care, Lauryn J. Banovitz, Liberty Bellah, Rosemarie Lion 2015 Dominican University of California

Oral Wellness: Using Occupational Therapy To Enhance Oral Hygiene Delivery In Long-Term Care, Lauryn J. Banovitz, Liberty Bellah, Rosemarie Lion

Master's Theses and Capstone Projects

Based on current literature, oral health in long-term care (LTC) facilities is frequently of low priority and does not follow evidence-based best practices. Poor oral health reduces the quality of life of older adult residents and patients and can lead to systemic diseases, such as cardiovascular disease, stroke, and pneumonia, the leading cause of death in LTC. Occupational therapists can play an instrumental role as oral care consultants, and educators, and can act as resource guides to raise the standards of oral care in LTC facilities.

This capstone project explored ways in which occupational therapy, a profession traditionally designated for ...


Comparison Of Three Different Nickel-Titanium Endodontic Rotary Systems In Shaping Simulated S-Shaped Canals, Elineida Perez 2015 Marquette University

Comparison Of Three Different Nickel-Titanium Endodontic Rotary Systems In Shaping Simulated S-Shaped Canals, Elineida Perez

Master's Theses (2009 -)

Introduction: Preparation error may result during mechanical instrumentation because of the complex anatomy of the root canal. Thus, flexibility and resistance to fracture are ideal properties that endodontic instruments should have. The aim of the study was to compare the shaping ability of three different nickel-titanium rotary instruments in simulated S-shape root canals by measuring transportation and canal volume change CVC. Materials and Methods: A total of 60 S-shaped canals in resin blocks were randomly allocated into 3 groups (n=20): Vortex Blue (Dentsply-Tulsa Dental Specialties), HyFlex CM (Coltène/Whaledent) and EndoSequence (Brasseler USA). Canals were filled with dye and ...


Effect Of Toothbrushing On Surface Roughness And Shade Of Extrinsically Stained Pressable Ceramic Restorations, Lessly Arlette Garza 2015 Marquette University

Effect Of Toothbrushing On Surface Roughness And Shade Of Extrinsically Stained Pressable Ceramic Restorations, Lessly Arlette Garza

Master's Theses (2009 -)

The purpose of this study was to investigate the effects of toothbrushing on surface roughness and shade change of extrinsically stained pressable ceramic restorations. Materials and Methods: Two materials, IPS Empress Esthetic and IPS e.max Press, were studied. For each material, 24 disc-shaped specimens, 10mm (diameter) x 3mm (height) were fabricated. Three different methods (n=8) of applying extrinsic stain was performed on each material: Glazed (G): glazed only (control); Stain then Glaze (SG): stained and fired, then glazed and fired. Stained and Glazed (T): glazed and stained together. Samples where brushed using a multi-station brushing machine. Each specimen ...


Effect Of Surface Preparation On The Shear Bond Strength Of Orthodontic Brackets Bonded To Zirconia : An In-Vitro Study, Nathaniel Wieder 2015 Nova Southeastern University

Effect Of Surface Preparation On The Shear Bond Strength Of Orthodontic Brackets Bonded To Zirconia : An In-Vitro Study, Nathaniel Wieder

College of Dental Medicine Student Theses, Dissertations and Capstones

Objectives: The purpose of this in-vitro study was to evaluate the effects of three different surface preparation methods on the shear bond strength of orthodontic brackets bonded to zirconia and determine the most appropriate method. Methods: 45 zirconia and 30 leucite-reinforced porcelain mandibular premolar crowns were divided into 5 groups and received the following surface preparations: 37% phosphoric acid and non-hydrolyzed silane, 4% hydrofluoric acid and hydrolyzed silane, microetch with 50μ Al 2 O3 particles. A universal adhesive primer containing MDP was applied and the brackets were bonded with a bis-GMA composite resin. Shear bond strength (SBS) at bond ...


Modification Of Ti6al4v Substrates With Well-Defined Zwitterionic Polysulfobetaine Brushes For Improved Surface Mineralization, Pingsheng Liu, Emily Domingue, David Ayers, Jie Song 2014 University of Massachusetts Medical School

Modification Of Ti6al4v Substrates With Well-Defined Zwitterionic Polysulfobetaine Brushes For Improved Surface Mineralization, Pingsheng Liu, Emily Domingue, David Ayers, Jie Song

Jie Song

Osteoconductive mineral coatings are beneficial for improving the osteointegration of metallic orthopedic/dental implants, but achieving adequate structural integration between the surface minerals and underlying metallic substrates has been a significant challenge. Here, we report covalent grafting of zwitterionic poly(sulfobetaine methacrylate) (pSBMA) brushes on the Ti6Al4V substrates to promote the surface-mineralization of hydroxyapatite with enhanced surface mineral coverage and mineral-substrate interfacial adhesion. We first optimized the atom transfer radical polymerization (ATRP) conditions for synthesizing pSBMA polymers in solution. Well-controlled pSBMA polymers (relative molecular weight up to 26,000, PDI = 1.17) with high conversions were obtained when the ATRP ...


Modification Of Ti6al4v Substrates With Well-Defined Zwitterionic Polysulfobetaine Brushes For Improved Surface Mineralization, Pingsheng Liu, Emily Domingue, David Ayers, Jie Song 2014 University of Massachusetts Medical School

Modification Of Ti6al4v Substrates With Well-Defined Zwitterionic Polysulfobetaine Brushes For Improved Surface Mineralization, Pingsheng Liu, Emily Domingue, David Ayers, Jie Song

Jie Song

Osteoconductive mineral coatings are beneficial for improving the osteointegration of metallic orthopedic/dental implants, but achieving adequate structural integration between the surface minerals and underlying metallic substrates has been a significant challenge. Here, we report covalent grafting of zwitterionic poly(sulfobetaine methacrylate) (pSBMA) brushes on the Ti6Al4V substrates to promote the surface-mineralization of hydroxyapatite with enhanced surface mineral coverage and mineral-substrate interfacial adhesion. We first optimized the atom transfer radical polymerization (ATRP) conditions for synthesizing pSBMA polymers in solution. Well-controlled pSBMA polymers (relative molecular weight up to 26,000, PDI = 1.17) with high conversions were obtained when the ATRP ...


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