keyword
MENU ▼
Read by QxMD icon Read
search

Porcelain veneer

keyword
https://www.readbyqxmd.com/read/28196165/effect-of-cervical-collar-removal-on-the-fracture-load-of-anterior-zirconia-crowns
#1
Fernanda Campos, Mayra Cardoso, Renata Marques de Melo, Marco Antonio Bottino, Rodrigo Oa Souza
The objective of this study was to assess the influence of the extension of collar and fatigue cycling on the fracture load of anterior zirconia crowns. A total of 60 anterior full-crown preparations (central incisor) were machined in glass fiber-filled epoxy resin. Zirconia copings were designed and milled using computer-aided design/computer-assisted manufacture (thickness: buccal = 0.62 mm, lingual = 0.65 mm, incisal = 0.72 mm). The cervical collars (occlusogingival height = 0.8 mm, buccolingual width = 1...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28190816/fracture-resistance-of-zirconia-composite-veneered-crowns-in-comparison-with-zirconia-porcelain-crowns
#2
Omar Alsadon, David Patrick, Anthony Johnson, Sarah Pollington, Duncan Wood
The objectives were to evaluate the fracture resistance and stress concentration in zirconia/composite veneered crowns in comparison to zirconia/porcelain crowns using occlusal fracture resistance and by stress analysis using finite element analysis method. Zirconia substructures were divided into two groups based on the veneering material. A static load was applied occlusally using a ball indenter and the load to fracture was recorded in Newtons (N). The same crown design was used to create 3D crown models and evaluated using FEA...
February 11, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28135638/effect-of-contact-stress-on-the-cycle-dependent-wear-behavior-of-ceramic-restoration
#3
Jiawen Guo, Ding Li, Haijing Wang, Yanwei Yang, Liying Wang, Delin Guan, Yinong Qiu, Lin He, Shaofeng Zhang
AIM: Ceramic restoration experiences the non-linear wear process during the chewing simulation, which contains running-in, steady and severe wear stages. However since various levels of contact stress may be applied on the occlusal surface during chewing, the cycle-dependent wear behaviors of ceramic crowns may differ. The aim of this study was to investigate the effect of contact stress on the development of wear behavior, as tested in a chewing simulator. MATERIALS AND METHODS: Thirty-six anatomical metal-ceramic crowns using Ceramco III as the veneering porcelain were randomly assigned to two groups based on the contact stress applied in the wear testing...
January 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28117855/marginal-sealing-of-a-porcelain-%C3%A2-laminate-veneer-luted-with-%C3%A2-three-different-resin-cements-%C3%A2-on-fluorosed-teeth
#4
Fereshteh Shafiei, Mahtab Memarpour, Zahra Jowkar
AIM: The purpose of this study was to investigate the sealing ability of three different resin cements for the luting of a porcelain laminate veneer (PLV) to the enamel and dentin of fluorosed teeth. MATERIALS AND METHOD: Thirty incisors with moderate fluorosis according to the Thylstrup-Fejerskov Index (TFI = 4 to 6) received a veneer preparation with dentin margins at the gingival third. The IPS Empress (Ivoclar Vivadent) veneers were luted to the teeth of three groups (n = 10) using three different resin cements: Group 1: Excite DSC/Variolink II - etch-and-rinse (E&R), Group 2: ED Primer II/Clearfil Esthetic - self-etch (SE), Group 3: RelyX Unicem - self-adhesive (SA)...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28054794/full-mouth-implant-rehabilitation-with-monolithic-zirconia-benefits-and-limitations
#5
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/28018561/comparison-of-the-fit-accuracy-of-zirconia-based-prostheses-generated-by-two-cad-cam-systems
#6
Seok-Joon Ha, Jin-Hyun Cho
PURPOSE: The purposes of this study are to evaluate the internal and marginal adaptation of two widely used CAD/CAM systems and to study the effect of porcelain press veneering process on the prosthesis adaptation. MATERIALS AND METHODS: Molar of a lower jaw typodont resin model was prepared by adjusting a 1.0 mm circumferential chamfer, an occlusal reduction of 2.0 mm, and a 5° convergence angle and was duplicated as an abrasion-resistant master die. The monolithic crowns and copings were fabricated with two different CAD/CAM system-Ceramil and Zirkonzahn systems...
December 2016: Journal of Advanced Prosthodontics
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
#7
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
#8
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
#9
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/27982231/low-fusing-porcelain-glaze-application-on-3y-tzp-surfaces-can-enhance-zirconia-porcelain-adhesion
#10
Lígia Tiaki Yamamoto, Vinícius Anéas Rodrigues, Lucio Strazzabosco Dornelles, Marco Antonio Bottino, Luiz Felipe Valandro, Renata Marques de Melo
The aim of this study was to assess whether surface treatment improves zirconia-porcelain adhesion. The 3Y-TZP blocks were cut into squares, then polished and sintered. The zirconia surface treatments were performed as follows: no treatment (C); tribochemical silica coating (TBS); glaze application + hydrofluoric acid etching (GA); glaze application + hydrofluoric acid etching + silanization (GAS); deposition of silica nanofilm (NF). After treatments, veneering porcelain cylinders (3.3 x 3.3 mm) were built up on all specimens and fired...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982228/effect-of-glaze-cooling-rate-on-mechanical-properties-of-conventional-and-pressed-porcelain-on-zirconia
#11
Diogo Longhini, Cibele Oliveira de Melo Rocha, Igor Studart Medeiros, Renata Garcia Fonseca, Gelson Luis Adabo
The aim of this study was to characterize a conventional and a pressed porcelain for zirconia core as to biaxial flexural strength (BFS), apparent fracture toughness (FT) and microstructure composition, and to investigate the effect of glaze cooling rate on the BFS of the zirconia/porcelain bilayers. Monolayers of conventional porcelain Vita VM9 and pressed porcelain Vita PM9 (n=15) (12 mm diameter x 1.2 mm thick) were prepared for the BFS test (MPa). Apparent fracture toughness (MPa.m1/2) was measured by indentation technique (n=15)...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982193/use-of-feldspathic-porcelain-veneers-to-improve-smile-harmony-a-3-year-follow-up-report
#12
Leonardo Federizzi, Érica Alves Gomes, Samantha Schaffer Pugilato Báratro, Flares Baratto-Filho, Ataís Bacchi, Aloísio Oro Spazzin
This case report describes an esthetic treatment to improve the shape and alignment of the anterior teeth, reestablishing smile harmony, using feldspathic porcelain veneers. Results of clinical follow up after 36 months are also presented. The advantages, disadvantages and limitations of the technique are detailed with reference to the relevant literature. This suggests that the success of treatment depends on adequate conditions of bonding between the veneers and the tooth complex, which involves parameters such as the strength and durability of the bond interface...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27957283/treatment-and-restoration-of-adult-dentoalveolar-trauma-a-clinical-case-report
#13
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/27890357/effect-of-cement-space-on-stress-distribution-in-y-tzp-based-crowns
#14
Carlos Eduardo Edwards Rezende, Ana Flávia Sanches Borges, Carla Castiglia Gonzaga, Yuanyuan Duan, José Henrique Rubo, Jason Alan Griggs
OBJECTIVE: To evaluate the stress distribution in bi-layered Y-TZP based crowns, according to the occlusal internal spacing between coping and abutment. METHODS: Twelve premolar shaped Y-TZP copings were made by a CAD/CAM system and seated on an abutment to evaluate the internal fit at the occlusal third using micro-CT images. Considering the fitting range obtained experimentally, two 3D finite element models, consisting on bone tissue, a titanium implant, a zirconia abutment, cement layer and a bi-layered Y-TZP ceramic crown were constructed based on the micro-CT images, one corresponding to the thinnest cement space and other representing the specimen with the thickest cement space obtained experimentally...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27866055/microstructure-and-nanoindentation-analyses-of-low-temperature-aging-on-the-zirconia-porcelain-interface
#15
M D Peng, J Q Wei, Y N Wang, Q Li
The aim of the present study was to investigate the effects of low-temperature aging on the micro-mechanical and micro-structural properties of zirconia-porcelain interface. In total, thirty-three Y-TZP zirconia blocks were fabricated by using CAD/CAM technology, veneered with porcelains. Specimens were submitted to low-temperature aging in an autoclave at 134°C, additional 0.2MPa pressure for 0h, 5h, or 10h. Flexural strength was obtained by using three-point bending test. Micro-mechanical properties (nano-hardness (H) and reduced modulus (Er)) were investigated by nanoindentation tests...
February 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27796574/clinical-performance-of-screw-retained-and-cemented-implant-supported-zirconia-single-crowns-36-month-results
#16
Claudio Cacaci, Friederike Cantner, Thomas Mücke, Peter Randelzhofer, Jan Hajtó, Florian Beuer
OBJECTIVES: The objective of this clinical study was to evaluate the clinical performance of implant-supported zirconia crowns with a sintered veneering cap. Furthermore, the influence of the type of retention (screw-retained vs cemented single crowns) was analysed. MATERIALS AND METHODS: Fifty-eight patients were accommodated with 114 implants, inserted in the molar and premolar regions. Zirconia-based crowns with a sintered veneering cap were either screw-retained (n = 53) or cemented (n = 61) on the implant...
October 29, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27796072/time-efficiency-analysis-of-the-treatment-with-monolithic-implant-crowns-in-a-digital-workflow-a-randomized-controlled-trial
#17
Tim Joda, Urs Brägger
OBJECTIVES: The aim of the randomized controlled trial was to analyze time-efficiency of a treatment with implant crowns made of monolithic lithium disilicate (LS2) plus titanium base vs. porcelain fuse to zirconium dioxide (ZrO2 ) in a digital workflow. MATERIALS AND METHODS: Twenty study participants were included for single-tooth replacement in premolar and molar sites. Baseline was the start of the prosthetic treatment. All patients received transocclusal screw-retained implant reconstructions on a soft tissue level-type implant...
November 2016: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/27765396/prospective-cohort-clinical-study-assessing-the-5-year-survival-and-success-of-anterior-maxillary-zirconia-based-crowns-with-customized-zirconia-copings
#18
Sami Dogan, Ariel J Raigrodski, Hai Zhang, Lloyd A Mancl
STATEMENT OF PROBLEM: Studies evaluating anterior zirconia-based crowns are limited. PURPOSE: The purpose of this prospective cohort clinical study was to assess the efficacy of zirconia-based anterior maxillary crowns with 0.3-mm customized copings at the cervical third and anatomical design elsewhere for up to 5 years of service. MATERIAL AND METHODS: Eighteen participants who required an anterior maxillary crown (n=20) and who had signed a consent form approved by the University of Washington Health Sciences Center Human Subjects Division were enrolled...
February 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27726968/effect-of-different-aging-methods-on-the-mechanical-behavior-of-multi-layered-ceramic-structures
#19
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/27707502/leucite-and-cooling-rate-effect-on-porcelain-zirconia-mechanical-behavior
#20
P D Meirelles, Y O Spigolon, M Borba, P Benetti
OBJECTIVE: This study investigated the influence of the cooling protocol on the mechanical behavior of Y-TZP veneered with porcelain with different compositions. The tested hypotheses were: (1) Y-TZP infrastructures veneered with porcelain containing leucite in its composition presents higher flexural strength (σ) and reliability (m), and (2) slow cooling protocol results in greater σ and m. METHODS: A total of 120 bilayer porcelain-Y-TZP bar-shaped specimens were prepared with the dimensions of 1...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
keyword
keyword
83482
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"