keyword
MENU ▼
Read by QxMD icon Read
search

Zirconia abutment

keyword
https://www.readbyqxmd.com/read/28642930/a-novel-etching-technique-for-surface-treatment-of-zirconia-ceramics-to-improve-adhesion-of-resin-based-luting-cements
#1
Eystein Ivar Ruyter, Nalini Vajeeston, Torbjørn Knarvang, Ketil Kvam
Objectives: Bonding of zirconia crowns and bridges to abutments is important, not only bonding of the thin resin layer to the abutment, but also bonding to the zirconia ceramic is crucial. Both mechanical and chemical adhesion are desired. Mechanical retention of dental porcelain achieved by etching with moderately concentrated hydrofluoric acid is not possible with zirconia ceramics. The purpose of this study was to show that etching is possible with relative low melting fluoride compounds such as ammonium hydrogen difluoride and potassium hydrogen difluoride...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28629657/single-unit-implant-supported-restoration-adjacent-to-multiple-lithium-disilicate-restorations-an-approach-to-an-esthetic-challenge-a-clinical-report
#2
Gelareh Ronaghi, Winston Chee, Stephanie Yeung
This clinical report describes a method for predictably shade matching a highly opaque yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) implant restoration adjacent to relatively translucent lithium disilicate veneers in the maxillary anterior region. To achieve a satisfactory outcome, the milled Y-TZP abutment was layered with low-fusing feldspathic porcelain to match the stump shade of the adjacent prepared teeth; this layer subsequently facilitated adhesive bonding of a veneer to the abutment before insertion...
June 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28598591/effect-of-split-file-digital-workflow-on-crown-margin-adaptation
#3
Ryan R Sheridan, Ronald Verrett, Stephan Haney, John Schoolfield
PURPOSE: Computer-aided design/computer-aided manufacturing (CAD/CAM) is becoming increasingly integrated into dental practice workflow at a pace that exceeds scientific validation. The aim of this study is to evaluate a complete digital split-file protocol relative to segmental digital and analog techniques for restoring a single maxillary anterior edentulous space with custom abutment and crown. MATERIALS AND METHODS: Four treatment workflows were assessed: complete digital (CD), segmental digital (SD), milled wax (AM), and heat pressed and hand waxed (AH) and heat pressed...
June 9, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28590093/marginal-adaptation-and-internal-fit-of-posterior-3-unit-zirconia-fpds-fabricated-with-different-cad-cam-systems
#4
Maryam Memarian, Leyla Sadighpour, Rojman Nosratpour, Mohammad J K Fard
The purpose of this study was to compare the accuracy of zirconia FPDs fabricated by different laboratory CAD/CAM system. Thirty-six FPD zirconia frameworks were fabricated on corresponding epoxy resin models that were duplicated from a master model of mandibular second premolar and second molar mounted in an acrylic block to simulate missing first mandibular tooth. Frameworks were divided into groups (n = 12) of three laboratory CAD/CAM systems: Cercon, Amann Girrbach, and Zirkonzahn. For the two factors, system and abutment type, the absolute marginal discrepancy (AMD) was measured before cementation...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28581693/a-prospective-clinical-trial-to-assess-the-optical-efficacy-of-pink-neck-implants-and-pink-abutments-on-soft-tissue-esthetics
#5
Mindy S Gil, Shigemi Ishikawa-Nagai, Hawazin W Elani, John D Da Silva, David M Kim, Dennis Tarnow, Ulrike Schulze-Späte, Nurit Bittner
OBJECTIVE: The purpose of this prospective, randomized, controlled, multicenter clinical study was to analyze the optical effects of an anodized pink colored implant shoulder/abutment system in the peri-implant mucosa of immediately placed dental implants. MATERIALS AND METHOD: Forty subjects with a restoratively hopeless tooth in the maxillary esthetic zone, were recruited and randomized to receive either a pink-neck implant, or a conventional gray implant. All patients received an immediate implant and immediate provisional and two identical CAD/CAM titanium abutments with different surface colors: pink and gray, and one zirconia all-ceramic crown...
June 5, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28552289/influence-of-space-size-of-abutment-screw-access-channel-on-the-amount-of-extruded-excess-cement-and-marginal-accuracy-of-cement-retained-single-implant-restorations
#6
Mohammad D Al Amri, Sulieman S Al-Johany, Mohammed N Al-Qarni, Ahmed S Al-Bakri, Nassr S Al-Maflehi, Haythem S Abualsaud
STATEMENT OF PROBLEM: The detrimental effect of extruded excess cement on peri-implant tissue has been well documented. Although several techniques have been proposed to reduce this effect by decreasing the amount of extruded cement, how the space size of the abutment screw access channel (SAC) affects the amount of extruded cement and marginal accuracy is unclear. PURPOSE: The purpose of this in vitro study was to evaluate the effect of the size of the unfilled space of the abutment SAC on the amount of extruded excess cement and the marginal accuracy of zirconia copings...
May 26, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28550849/acceptable-esthetic-outcomes-with-prefabricated-and-computer-aided-design-and-computer-aided-manufacturing-zirconia-abutments-in-anterior-single-implant-supported-crowns-after-1-year
#7
Romina Brignardello-Petersen
No abstract text is available yet for this article.
June 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28533015/in%C3%A2-vitro-comparison-of-the-load-bearing-capacity-of-ceramic-and-metal-ceramic-resin-bonded-fixed-dental-prostheses-in-the-posterior-region
#8
Wolfgang Bömicke, Moritz Waldecker, Johannes Krisam, Peter Rammelsberg, Stefan Rues
STATEMENT OF PROBLEM: The clinical use of ceramic resin-bonded fixed dental prostheses (RBFDPs) in the posterior region is desirable for esthetic and biological reasons but has been associated with many technical problems, including fractures or chipping of the veneer. Although these problems may be overcome by using monolithic zirconia, information is lacking about the load-bearing capacity of resin-bonded monolithic zirconia restorations for replacing a molar. PURPOSE: The purpose of this in vitro study was to compare the load-bearing capacity (Fu), the load at initial damage (F1d), and the failure pattern of posterior RBFDPs fabricated from monolithic zirconia (MZr), veneered zirconia (VZr), and veneered cobalt-chromium (VCo)...
May 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28533012/a-technique-for-the-removal-of-a-wedged-implant-abutment-fragment-or-debonded-titanium-base
#9
Geoffrey R Johnston, Faris Z Jamjoom, Damian J Lee
A technique for the retrieval of wedged implant fragments is described. The technique is suitable for fractured zirconia and metal abutments and titanium bases left behind after fracture or debonding of the custom zirconia abutment from the titanium base of an implant-supported prosthesis. This straightforward, noninvasive, technique facilitates the removal of the fragments or titanium bases without risking damage to the implant, surrounding bone, or soft tissues.
May 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28518187/in-vitro-shock-absorption-tests-on-implant-supported-crowns-influence-of-crown-materials-and-luting-agents
#10
Martin Rosentritt, Sibylle Schneider-Feyrer, Michael Behr, Verena Preis
PURPOSE: To investigate the force absorption capacity of implant-supported crowns made of different restorative materials and connected to abutments with different luting agents. MATERIALS AND METHODS: Molar crowns were milled of different computer-aided design/computer-aided manufacture materials (n = 8 crowns per material): polymethyl methacrylate, polyether ether ketone, composite, lithium disilicate, titanium, and zirconia. Crowns were mounted on titanium implant replicas using different luting agents: uncemented, temporarily cemented (zinc oxide-eugenol cement), conventionally cemented (zinc oxide phosphate cement), and adhesively bonded...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28513977/use-of-high-performance-polymers-as-dental-implant-abutments-and-frameworks-a-case-series-report
#11
Mohammad Al-Rabab'ah, Wala'a Hamadneh, Ismail Alsalem, Ameen Khraisat, Ashraf Abu Karaky
Dental implant abutments can be made of different materials including titanium, gold, zirconia, alumina, and polymeric materials. Polyetheretherketone (PEEK) is a high performance thermoplastic polymer that can be used as a dental implant abutment material. It has an elastic modulus comparable to bone and can reduce stress shielding. PEEK is a radiolucent material that can allow better radiographic imaging of peri-implant tissues and can be veneered with composite materials or bonded to ceramics. PEEK is widely used in orthopedic and spinal surgeries, and it possesses mechanical and biological characteristics that encourage its use as dental implant abutments...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28509509/fracture-of-zirconia-abutment-with-metallic-insertion-on-anterior-single-titanium-implant-with-internal-hexagon-retrieval-analysis-of-a-failure
#12
Marco Antonio Bottino, Regina Furbino Villefort Rocha, Lilian Costa Anami, Mutlu Özcan, Renata Marques de Melo
This case report presents a retrieval analysis of a screw-retained one-piece restoration with the veneering ceramic fired directly onto the zirconia abutment that fractured during insertion. A patient who experienced root fracture of a maxillary left central incisor received a titanium implant on the same day as extraction. After delayed implant loading, a two-piece zirconia abutment with metallic insertion was customized. Upon installation, a horizontal fracture of the crown just above the metallic portion was detected...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28506651/a-load-to-fracture-and-strain-analysis-of-monolithic-zirconia-cantilevered-frameworks
#13
Faris A Alshahrani, Burak Yilmaz, Jeremy D Seidt, Edwin A McGlumphy, William A Brantley
STATEMENT OF PROBLEM: The dimensions of implant-supported fixed cantilevered prostheses are important to prevent mechanical and biological complications. Information on the optimum thickness and cantilever length for improving the strength of zirconia cantilevered frameworks is limited in the literature. PURPOSE: The purpose of this in vitro study was to investigate the effect of cantilever length and occlusocervical thickness on the load-to-fracture and strain distribution of zirconia frameworks...
May 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28494273/fatigue-limit-of-monolithic-y-tzp-three-unit-fixed-dental-prostheses-effect-of-grinding-at-the-gingival-zone-of-the-connector
#14
Marina Amaral, Regina F Villefort, Renata Marques Melo, Gabriel K R Pereira, Yu Zhang, Luiz Felipe Valandro, Marco Antonio Bottino
OBJECTIVES: To determine the fatigue limits of three-unit monolithic zirconia fixed dental prosthesis (FDPs) before and after grinding of the gingival areas of connectors with diamond burs. MATERIAL AND METHODS: FDPs were milled from pre-sintered blocks of zirconia simulating the absence of the first mandibular molar. Half of the specimens were subjected to grinding, simulating clinical adjustment, and all of them were subjected to glazing procedure. Additional specimens were manufactured for roughness analysis...
August 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28494037/effect-of-abutment-preparation-and-fatigue-loading-in-a-moist-environment-on-the-fracture-resistance-of-the-one-piece-zirconia-dental-implant
#15
Mohamed Kamel, Tritala K Vaidyanathan, Robert Flinton
PURPOSE: One-piece zirconia dental implants have been widely used in Europe for many years. This in vitro study was done to evaluate the effect of abutment preparation and fatigue (cyclic) loading in a moist environment on the fracture resistance of the one-piece zirconia dental implant. MATERIALS AND METHODS: Twenty-four Cera Root zirconium oxide dental implants, divided into three groups of eight, were used in this study: group 1 (control group): implants with no preparation, tested in a dry environment; group 2: implants with no preparation, tested in a moist environment (simulating clinical conditions); and group 3: implants after abutment preparation tested in a moist environment...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28478991/comparison-of-3d-displacements-of-screw-retained-zirconia-implant-crowns-into-implants-with-different-internal-connections-with-respect-to-screw-tightening
#16
Hanadi A Rebeeah, Burak Yilmaz, Jeremy D Seidt, Edwin McGlumphy, Nancy Clelland, William Brantley
STATEMENT OF PROBLEM: Internal conical implant-abutment connections without horizontal platforms may lead to crown displacement during screw tightening and torque application. This displacement may affect the proximal contacts and occlusion of the definitive prosthesis. PURPOSE: The purpose of this in vitro study was to evaluate the displacement of custom screw-retained zirconia single crowns into a recently introduced internal conical seal implant-abutment connection in 3D during hand and torque driver screw tightening...
May 5, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28461047/influence-of-cement-type-and-ceramic-primer-on-retention-of-polymer-infiltrated-ceramic-crowns-to-a-one-piece-zirconia-implant
#17
Nadja Rohr, Stefan Brunner, Sabrina Märtin, Jens Fischer
STATEMENT OF PROBLEM: The best procedure for cementing a restoration to zirconia implants has not yet been established. PURPOSE: The purpose of this in vitro study was to measure the retention of polymer-infiltrated ceramic crowns to zirconia 1-piece implants using a wide range of cements. The effect of ceramic primer treatment on the retention force was also recorded. The retention results were correlated with the shear bond strength of the cement to zirconia and the indirect tensile strength of the cements to better understand the retention mechanism...
April 28, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28440007/spectrophotometric-analysis-of-fluorescent-zirconia-abutments-compared-to-conventional-zirconia-abutments-a-within-subject-controlled-clinical-trial
#18
Daniel S Thoma, Felix B Gamper, Vítor M Sapata, Giuseppe Voce, Christoph H F Hämmerle, Irena Sailer
BACKGROUND: Zirconia abutments are frequently used for implant-supported single crowns. Even though demonstrating esthetic benefits compared to metal abutments, zirconia abutments lead to an increased brightness of the peri-implant mucosa compared to natural teeth and are not ideal from an esthetic point of view. PURPOSE: To test whether or not a fluorescent hybrid zirconia abutment offers superior esthetics compared to a non-fluorescent one-piece zirconia abutment based on spectrophotometric analysis...
April 24, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28383306/dislodgement-resistance-of-zirconia-copings-cemented-onto-zirconia-and-titanium-abutments
#19
Umut Güler, Yasemin Budak, José Renato Cavalcanti Queiroz, Mutlu Özcan
PURPOSE: To determine the effect of the cement type and abutment material on the tensile strength required to dislodge zirconia copings. MATERIALS AND METHODS: Two experimental groups of abutments were prepared: (1) titanium abutments (n = 30) and (2) zirconia abutments (n = 30). Sixty zirconia copings (custom designed) were fabricated using 3-dimensional computer-assisted design to have a 6-mm projection above the abutment to accommodate a hole, through which a wire was inserted to attach the zirconia coping to a universal testing machine...
April 5, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28343676/influence-of-different-forms-and-materials-zirconia-or-titanium-of-abutments-in-periimplant-soft-tissue-healing-using-matrix-metalloproteinase-8-a-randomized-pilot-study
#20
Yogesh Kumar, Veena Jain, Shyam Singh Chauhan, Vinayak Bharate, Dheeraj Koli, Manish Kumar
STATEMENT OF PROBLEM: It is unclear how pathogenic bacteria adhere to different implant materials and whether biomarker matrix metalloproteinase-8 (MMP-8) level provides a reliable method of evaluating the connective tissue status of periimplant tissues. PURPOSE: The purpose of this pilot clinical study was to evaluate periimplant connective tissue response by assessing the MMP-8 levels in periimplant crevicular fluid around titanium and zirconia abutments. MATERIAL AND METHODS: The study was designed as a prospective, within-subject comparison with left-right randomization low...
March 23, 2017: Journal of Prosthetic Dentistry
keyword
keyword
110361
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"