keyword
MENU ▼
Read by QxMD icon Read
search

dental porcelain

keyword
https://www.readbyqxmd.com/read/28279436/characterisation-of-nanovoiding-in-dental-porcelain-using-small-angle-neutron-scattering-and-transmission-electron-microscopy
#1
Alexander Lunt, Ann Terry, Siqi Ying, Nikolaos Baimpas, Tan Sui, Saurabh Kabra, Joe Kelleher, Stephen King, Neo Tee Khin, Alexander M Korsunsky
OBJECTIVES: Recent studies of the yttria partially stabilised zirconia-porcelain interface have revealed the presence of near-interface porcelain nanovoiding which reduces toughness and leads to component failure. One potential explanation for these nanoscale features is thermal creep which is induced by the combination of the residual stresses at the interface and sintering temperatures applied during manufacture. The present study provides improved understanding of this important phenomenon...
March 6, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28258661/polymerization-mode-of-self-adhesive-dual-cured-dental-resin-cements-light-cured-through-various-restorative-materials
#2
Ji Suk Shim, Jeong Kyung Kang, Nayansi Jha, Jae Jun Ryu
OBJECTIVE: The aim of this study was to investigate the polymerization mode of self-adhesive, dual-cured resin cements light-cured through overlying materials with different degree of translucency by measuring the degree of conversion (DC). MATERIALS AND METHODS: Three kinds of self-adhesive, dual-cured resin cements (G-CEM LinkAce(TM) , Maxcem Elite(TM) , and BisCem(®) ) were light-cured through three different restorative materials that included porcelain-fused metal (PFM), zirconia, and lithium disilicate...
March 4, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28258266/effect-of-newly-developed-resin-cements-and-thermocycling-on-the-strength-of-porcelain-laminate-veneers
#3
Fawaz I Alqahtani
AIM: The aim of this study was to determine the effect of different luting cements and accelerated artificial aging (AAA) in the fracture resistance of porcelain laminate veneers (PLVs). MATERIALS AND METHODS: A total of 80 disc-shaped specimens were prepared using computer-aided design/computer-aided milling technology from lithium disilicate glass-ceramic blocks. Specimens (0.5 mm thick, 10 mm diameter) were divided into eight groups of 10 specimens per group...
March 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28217840/a-comparison-of-us-and-japanese-dental-restorative-care-present-on-service-members-recovered-from-the-wwii-era
#4
Calvin Y Shiroma
The documentation of dental materials used in the USA during the WWII era is readily available, while references for the Japanese are minimal. It was therefore important to build a photographic database of Japanese restorative care which could be utilized as a comparison tool for the deployed odontologist. The dental restorative care of approximately 400 US and 100 Japanese sets of remains was evaluated. Both countries share many similar restorative techniques to include collared crowns, full-coverage restorations, cantilever bridge/pontics to close spaces; restorative materials such as amalgam, gold, and zinc phosphate (temporary) restorations; and removable prostheses...
February 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28163345/thermal-residual-stresses-in-bilayered-trilayered-and-graded-dental-ceramics
#5
Douglas Fabris, Júlio C M Souza, Filipe S Silva, Márcio Fredel, Joana Mesquita-Guimarães, Yu Zhang, Bruno Henriques
Layered ceramic systems are usually hit by residual thermal stresses created during cooling from high processing temperature. The purpose of this study was to determine the thermal residual stresses at different ceramic multi-layered systems and evaluate their influence on the bending stress distribution. Finite elements method was used to evaluate the residual stresses in zirconia-porcelain and alumina-porcelain multi-layered discs and to simulate the 'piston-on-ring' test. Temperature-dependent material properties were used...
March 2017: Ceramics International
https://www.readbyqxmd.com/read/28104926/the-bending-stress-distribution-in-bilayered-and-graded-zirconia-based-dental-ceramics
#6
Douglas Fabris, Júlio C M Souza, Filipe S Silva, Márcio Fredel, Joana Mesquita-Guimarães, Yu Zhang, Bruno Henriques
The purpose of this study was to evaluate the biaxial flexural stresses in classic bilayered and in graded zirconia-feldspathic porcelain composites. A finite element method and an analytical model were used to simulate the piston-on-ring test and to predict the biaxial stress distributions across the thickness of the bilayer and graded zirconia-feldspathic porcelain discs. An axisymmetric model and a flexure formula of Hsueh et al. were used in the FEM and analytical analysis, respectively. Four porcelain thicknesses were tested in the bilayered discs...
July 2016: Ceramics International
https://www.readbyqxmd.com/read/28054794/full-mouth-implant-rehabilitation-with-monolithic-zirconia-benefits-and-limitations
#7
Sarah Amin, Hans-Peter Weber, Yukio Kudara, Panos Papaspyridakos
As increased chipping rates have been reported with porcelain-fused-to-zirconia fixed dental prostheses, monolithic zirconia has been introduced in an effort to reduce the technical complications associated with bilayered ceramics. This clinical report illustrates the steps for achieving full-mouth implant rehabilitation with monolithic zirconia prostheses and minimal facial porcelain veneering. The benefits and limitations of this technique are also discussed. The incisal edges and occluding surface areas comprised monolithic zirconia to reduce the possibility of breakage and improve the esthetic outcome...
January 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28006713/influence-of-sodalite-zeolite-infiltration-on-the-coefficient-of-thermal-expansion-and-bond-strength-of-all-ceramic-dental-prostheses
#8
Ghassan Abdul-Hamid Naji, Ros Anita Omar, Rosiyah Yahya
In all-ceramic systems, a high incidence of veneer chip-off has been reported in clinical studies. Coefficient of thermal expansion (CTE) behaviour is one of the factors that may increase residual stress in the interface and influence the veneer/core bond strength. Therefore, this study aimed to evaluate the effect of sodalite zeolite-infiltration on the CTE behaviour and bond strength of different all-ceramic prostheses. The case-study groups were synthesized sodalite zeolite-infiltrated alumina (IA-SOD) and synthesized sodalite zeolite-infiltrated zirconia-toughened alumina (ZTA) (IZ-SOD), while the control groups were glass-infiltrated alumina (IA-glass) and glass-infiltrated ZTA (IZ-glass)...
December 15, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27995653/influence-of-misfit-on-the-occurrence-of-veneering-porcelain-fractures-chipping-in-implant-supported-metal-ceramic-fixed-dental-prostheses-an-in%C3%A2-vitro-pilot-trial
#9
Nils Löfgren, Christel Larsson, Nikos Mattheos, Martin Janda
OBJECTIVE: Technical complications such as veneer fractures are more common in implant-supported than tooth-supported restorations. The underlying causes have not been fully identified. The aim of this study was to evaluate whether misfit between the restoration and the implant may affect the risk of veneer fractures. MATERIALS AND METHODS: Twenty standardized five-unit implant-supported metal-ceramic fixed dental prostheses (FDP)s were manufactured and fixed in acrylic blocks...
December 19, 2016: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/27987657/influence-of-interlayer-design-on-residual-thermal-stresses-in-trilayered-and-graded-all-ceramic-restorations
#10
Bruno Henriques, Douglas Fabris, Júlio C M Souza, Filipe S Silva, Joana Mesquita-Guimarães, Yu Zhang, Márcio Fredel
Residual thermal stresses are formed in dental restorations during cooling from high temperature processing. The aim of this study was to evaluate the influence of constructive design variables (composition and interlayer thickness) on residual stresses in alumina- and zirconia-graded restorations. Restorations' real-like cooling conditions were simulated using finite elements method and temperature-dependent material properties were used. Three different designs were evaluated: a bilayered restoration (sharp transition between materials); a trilayered restoration with a homogenous interlayer between core and veneer; and a trilayered restoration with a graded interlayer...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27957283/treatment-and-restoration-of-adult-dentoalveolar-trauma-a-clinical-case-report
#11
Blanca Serra-Pastor, Miguel Penarrocha-Diago, María Penarrocha-Diago, Rubén Agustín-Panadero
Adult dentoalveolar trauma most often occurs in the context of sports activities and traffic accidents. Coronal fractures are the most common type of lesion, followed by tooth luxation. We present the case of a 25-year-old woman who suffered alveolar bone damage and coronal fractures of the upper incisors, with extrusive luxation of the right central incisor, as the result of a fall. On the first visit, manual reduction of the buccal plate was carried out under local anesthesia, with repositioning of the right central incisor and splinting to the neighboring teeth...
December 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27934671/does-the-sequence-of-preclinical-dental-crown-type-preparations-affect-evaluation-scores
#12
Tom V Korioth, Michael A McBride
Preclinical dental students must demonstrate aptitude in the preparation of teeth for treatment with several types of fixed dental prostheses. The optimal sequence of instruction and examination of these crown preparations in preclinical fixed prosthodontics is unknown. The aim of this study was to determine if grading scores by faculty and students were affected by changing the sequence of crown type preparations. Practical exams of two successive student cohorts (n=89 in 2014; n=92 in 2015) at one U.S. dental school using three crown preparations (full cast, porcelain fused to metal, and all-ceramic) in different order were analyzed by faculty grades and student self-assessment...
December 2016: Journal of Dental Education
https://www.readbyqxmd.com/read/27829759/an-in-vitro-study-to-evaluate-the-difference-in-shade-between-commercially-available-shade-guides-and-glazed-porcelain
#13
P Manimaran, D Sai Sadan
INTRODUCTION: Smile is one of the most important interactive communication skills of a person. A smile is the key factor for an aesthetic appearance. Hence aesthetics is one of the motivating factor for the patients to seek dental care. Correction of unaesthetic appearance gives a positive effect to the self esteem of the patient. AIM: The aim of this study was to compare the difference in the shade between the commercially available shade guides namely Vita Classical And Ivoclar Chromascop and the fired porcelain samples fabricated using Vita Zahnfabrik VMK 95 and Ivoclar Classic Materials respectively...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27733720/qualitative-assessment-of-wear-resistance-and-surface-hardness-of-different-commercially-available-dental-porcelain-an-in-vitro-study
#14
Abhishek Singh, Abhishek Nagpal, Salil Pawah, Chetan Pathak, Gaurav Issar, Pankaj Sharma
INTRODUCTION: In an attempt to minimize wear damage to the enamel of antagonist teeth, new low and medium fusing ceramic materials have been developed. Manufacturers usually claim that these ceramics are wear-friendly because of their lower hardness, lower concentrations of crystal phase, and smaller crystal sizes. This study aimed to quantitatively analyze the wear strength of various commercially available dental porcelain with tooth enamel as well as the surface hardness of these dental porcelain...
September 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27726968/effect-of-different-aging-methods-on-the-mechanical-behavior-of-multi-layered-ceramic-structures
#15
Márcia Borba, Maico D de Araújo, Karen A Fukushima, Humberto N Yoshimura, Jason A Griggs, Álvaro Della Bona, Paulo F Cesar
OBJECTIVE: To evaluate the effect of two aging methods (mechanical cycling and autoclave) on the mechanical behavior of veneer and framework ceramic specimens with different configurations (monolithic, two and three-layers). METHODS: Three ceramics used as framework for fixed dental prostheses (YZ-Vita In-Ceram YZ; IZ-Vita In-Ceram Zirconia; AL-Vita In-Ceram AL) and two veneering porcelains (VM7 and VM9) were studied. Bar-shaped specimens were produced in three different designs: monolithic, two layers (porcelain-framework) and three layers (porcelain-framework-porcelain)...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27722227/artefacts-of-implant-supported-single-crowns-impact-of-material-composition-on-artefact-volume-on-dental-mri
#16
Tim Hilgenfeld, Marcel Prager, Franz Sebastian Schwindling, Alexander Heil, Stefan Kuchenbecker, Peter Rammelsberg, Martin Bendszus, Sabine Heiland
PURPOSE: MRI allows radiation-free imaging of the head and neck area. However, implant-supported prostheses may severely impair image quality due to artefacts. Therefore, identification of preferable material compositions for implants and supported prostheses with little impact on MR image quality is mandatory. MATERIALS AND METHODS: Overall, one zirconia and four titanium dental implants were provided with different single crown materials: porcelain-fused-to-metal precious alloy (GP-T), porcelain-fused-to-metal non-precious alloy (CCT-T), porcelain-fused-to-zirconia (ZC-T) and monolithic zirconia (Z-T, Z-Z)...
2016: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/27694297/quality-of-impressions-and-work-authorizations-submitted-by-dental-students-supervised-by-prosthodontists-and-general-dentists
#17
Terence A Imbery, Nicholas Diaz, Kristy Greenfield, Charles Janus, Al M Best
Preclinical fixed prosthodontics is taught by Department of Prosthodontics faculty members at Virginia Commonwealth University School of Dentistry; however, 86% of all clinical cases in academic year 2012 were staffed by faculty members from the Department of General Practice. The aims of this retrospective study were to quantify the quality of impressions, accuracy of laboratory work authorizations, and most common errors and to determine if there were differences between the rate of errors in cases supervised by the prosthodontists and the general dentists...
October 2016: Journal of Dental Education
https://www.readbyqxmd.com/read/27693778/dentist-material-selection-for-single-unit-crowns-findings-from-the-national-dental-practice-based-research-network
#18
Sonia K Makhija, Nathaniel C Lawson, Gregg H Gilbert, Mark S Litaker, Jocelyn A McClelland, David R Louis, Valeria V Gordan, Daniel J Pihlstrom, Cyril Meyerowitz, Rahma Mungia, Michael S McCracken
OBJECTIVES: Dentists enrolled in the National Dental Practice-Based Research Network completed a study questionnaire about techniques and materials used for single-unit crowns and an enrollment questionnaire about dentist/practice characteristics. The objectives were to quantify dentists' material recommendations and test the hypothesis that dentist's and practice's characteristics are significantly associated with these recommendations. METHODS: Surveyed dentists responded to a contextual scenario asking what material they would use for a single-unit crown on an anterior and posterior tooth...
December 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27611758/application-of-monolithic-zirconia-ceramics-in-dental-practice-a-case-history-report
#19
Hee-Kyung Kim, Sung-Hun Kim, Jai-Bong Lee, Jung-Suk Han, In-Sung Yeo
Monolithic zirconia restorations increasingly have been used in dental practice in recent years and demonstrate superior mechanical performance compared with porcelain-veneered zirconia restorations. Recent advances in manufacturing technology have made possible the fabrication of translucent monolithic zirconia ceramics. This case report describes three clinical examples of monolithic zirconia fixed dental prostheses being used in the anterior and posterior regions and exhibiting acceptable esthetic results...
September 2016: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/27608200/staged-reconstruction-for-a-severely-worn-dentition
#20
Christopher Wilson
When patients are constrained financially to receive dental work, a staged approach can be an effective way for enabling treatment to proceed. In this case, a patient who had been in the practice for about 10 years and had a severely worn and eroded dentition finally opted to receive treatment in stages. A systematic approach was used to determine the proper postoperative position of the teeth. The subsequent treatment plan included the use of porcelain onlays and full-coverage crowns in the mandibular posterior along with provisional direct composite restorations in the maxillary dentition; the composites would be transitioned to porcelain crowns as the patient's finances would allow...
September 2016: Compendium of Continuing Education in Dentistry
keyword
keyword
101734
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"