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https://www.readbyqxmd.com/read/29678585/fracture-load-of-metal-ceramic-monolithic-and-bi-layered-zirconia-based-posterior-fixed-dental-prostheses-after-thermo-mechanical-cycling
#1
Carlos López-Suárez, Raquel Castillo-Oyagüe, Verónica Rodríguez-Alonso, Christopher D Lynch, María-Jesús Suárez-García
OBJECTIVES: This study aims to evaluate the fracture load of differently fabricated 3-unit posterior fixed dental prostheses (FDPs) with an intermediate pontic. METHODS: Fifty sets of two stainless-steel abutments were randomly assigned to five groups (n = 10 each) depending on the material and technique used for manufacturing the FDPs: (1) Metal-ceramic (MC, control); (2) Lava Zirconia (LZ, bi-layered); (3) Lava Plus (LM, monolithic); (4) VITA In-Ceram YZ (YZ, bi-layered); and (5) IPS e-max ZirCAD (ZZ, bi-layered)...
April 17, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29678328/chairside-cad-cam-materials-part-3-cyclic-fatigue-parameters-and-lifetime-predictions
#2
Michael Wendler, Renan Belli, Diana Valladares, Anselm Petschelt, Ulrich Lohbauer
OBJECTIVES: Chemical and mechanical degradation play a key role on the lifetime of dental restorative materials. Therefore, prediction of their long-term performance in the oral environment should base on fatigue, rather than inert strength data, as commonly observed in the dental material's field. The objective of the present study was to provide mechanistic fatigue parameters of current dental CAD/CAM materials under cyclic biaxial flexure and assess their suitability in predicting clinical fracture behaviors...
April 17, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29677224/dental-shade-guide-variability-for-hues-b-c-and-d-using-cross-polarized-photography
#3
Camila S Sampaio, Jon Gurrea, Marta Gurrea, August Bruguera, Pablo J Atria, Malvin Janal, Estevam A Bonfante, Paulo G Coelho, Ronaldo Hirata
This study evaluated the color variability of hues B, C, and D between the VITA Classical shade guide (Vita Zahnfabrik) and four other VITA-coded ceramic shade guides using a digital camera (Canon EOS 60D) and computer software (Adobe Photoshop CC). A cross-polarizing filter was used to standardize external light sources influencing color match. A total of 275 pictures were taken, 5 per shade tab, for 11 shades (B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, and D4), from the following shade guides: VITA Classical (control); IPS e...
April 20, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29670720/clinical-and-radiographic-assessment-of-reasons-for-replacement-of-metal-ceramic-fixed-dental-prostheses-in-patients-referring-to-dental-school
#4
Roa'a Al Refai, Samah Saker
Background: The expected length of service and reasons for fixed dental prostheses (FDPs) replacement are a frequent inquiry by patients while the answers were mainly based on studies reports that was conducted outside the middle east region. This clinical and radiographic survey was constructed to assess and survey clinically and radiographically the reasons of replacement of metal-ceramic fixed dental prostheses, amongst patients reporting at dental school in Taibah University. Material and Methods: Between January and May 2016, 151 patients were recruited for this study...
January 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29669951/accuracy-of-digital-models-generated-by-conventional-impression-plaster-model-methods-and-intraoral-scanning
#5
Yuki Tomita, Jun Uechi, Masahiro Konno, Saera Sasamoto, Masahiro Iijima, Itaru Mizoguchi
We compared the accuracy of digital models generated by desktop-scanning of conventional impression/plaster models versus intraoral scanning. Eight ceramic spheres were attached to the buccal molar regions of dental epoxy models, and reference linear-distance measurement were determined using a contact-type coordinate measuring instrument. Alginate (AI group) and silicone (SI group) impressions were taken and converted into cast models using dental stone; the models were scanned using desktop scanner. As an alternative, intraoral scans were taken using an intraoral scanner, and digital models were generated from these scans (IOS group)...
April 17, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29665177/prosthodontic-complications-of-metal-ceramic-and-all-ceramic-complete-arch-fixed-implant-prostheses-with-minimum-5-years-mean-follow-up-period-a-systematic-review-and-meta-analysis
#6
REVIEW
Chi Kin Kenneth Wong, Unnati Narvekar, Haralampos Petridis
PURPOSE: The purpose of this systematic review and meta-analysis was to review and analyze the prosthodontic complications, survival, and success of metal-ceramic (MC) and all-ceramic (AC) complete-arch fixed implant dental prostheses (CFIDPs) with a minimum mean follow-up period of 5 years. METHODS: A structured literature search was conducted using 3 electronic databases (MEDLINE, the Cochrane Library, Web of Science) for clinical studies reporting on prosthodontic complications of metal-ceramic and/or all-ceramic CFIDPs published between 2000 and 2016...
April 17, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29655413/the-science-and-application-of-ips-e-max-dental-ceramic
#7
REVIEW
Alec Willard, Tien-Min Gabriel Chu
The aim of this paper is to report the state of current literature and recommendations for the lithium disilicate glass-ceramic IPS e.Max. The materials science, mechanical and optical properties were reviewed. Additionally an assessment was conducted of current implementation recommendations and clinical outcomes. This paper provides a brief historical overview, summary of the findings the findings of current literature, and clinical recommendation for the use of IPS e.Max CAD in dental applications.
April 2018: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29627218/effect-of-chemical-surface-treatment-of-titanium-on-its-bond-with-dental-ceramics
#8
Monika Parchańska-Kowalik, Emilia Wołowiec-Korecka, Leszek Klimek
STATEMENT OF PROBLEM: Airborne-particle abrasion of titanium is a clinically accepted method of surface preparation. As a side effect of airborne-particle abrasion, particles of the abrasive material get embedded into the surface. How particle presence or removal from the titanium surface affects the strength of the titanium-ceramic bond is unclear. PURPOSE: The purpose of this in vitro study was to determine the effect of removing Al2 O3 particles embedded into the surface by means of chemical surface treatment on the strength of the titanium-ceramic bond...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627217/replicating-a-discolored-tooth-preparation-a-technique-for-effective-laboratory-communication
#9
Jay D Matani, Mohit G Kheur, Tabrez A Lakha, Vinay Jain
Fabricating a ceramic restoration for a discolored anterior tooth presents a clinical challenge. The dental technician is often hampered by being unaware of the shade of the discolored tooth preparation, which influences the color of the overlying ceramic restoration. A definitive cast that replicates the shade of the prepared tooth helps the ceramist to fabricate a restoration that masks the discoloration appropriately and still achieves the desired optical properties. This report demonstrates the use of a technique of recording and communicating the shade of a prepared tooth to the dental laboratory technician...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627213/macro-and-microtopographical-examination-and-quantification-of-cad-cam-composite-resin-2-and-3-body-wear
#10
Carolin Stöckl, Rüdiger Hampe, Bogna Stawarczyk, Miriam Haerst, Malgorzata Roos
STATEMENT OF PROBLEM: The selection of an appropriate restorative material based on wear behavior is important for the long-term success of a dental restoration. For computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins, information about their wear resistance and wear mechanism is scarce. PURPOSE: The purpose of this in vitro study was to compare the 2- and 3-body wear of CAD-CAM composite resins with that of lithium disilicate ceramic and to develop analysis software...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627209/digital-evaluation-of-absolute-marginal-discrepancy-a-comparison-of-ceramic-crowns-fabricated-with-conventional-and-digital-techniques
#11
Shanshan Liang, Fusong Yuan, Xu Luo, Zhuoren Yu, Zhihui Tang
STATEMENT OF PROBLEM: Marginal discrepancy is key to evaluating the accuracy of fixed dental prostheses. An improved method of evaluating marginal discrepancy is needed. PURPOSE: The purpose of this in vitro study was to evaluate the absolute marginal discrepancy of ceramic crowns fabricated using conventional and digital methods with a digital method for the quantitative evaluation of absolute marginal discrepancy. The novel method was based on 3-dimensional scanning, iterative closest point registration techniques, and reverse engineering theory...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627208/influence-of-repeated-firings-on-marginal-axial-axio-occlusal-and-occlusal-fit-of-metal-ceramic-restorations-fabricated-with-different-techniques
#12
Özay Önöral, Mutahhar Ulusoy, Emre Seker, İlker Etikan
STATEMENT OF PROBLEM: Ill-fitting restorations can jeopardize dental, periodontal, and systemic health. Repeated ceramic firing may influence the fitting accuracy of restorations, but scientific information regarding this issue is lacking. PURPOSE: The purpose of this in vitro study was to assess and compare the influence of repeated firings on the marginal, axial, axio-occlusal, and occlusal fit of metal-ceramic 3-unit fixed partial dentures (FPDs) manufactured with different framework methods, including casting, fully sintered hard alloy milling (FHAM), presintered soft alloy milling (PSAM), and selective laser sintering (SLS)...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29610618/effect-of-luting-cements-on-the-bond-strength-to-turkom-cera-all-ceramic-material
#13
Bandar M A Al-Makramani, Abdul A A Razak, Mohamed I Abu-Hassan, Fuad A Al-Sanabani, Fahad M Albakri
BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations. AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material. MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40)...
March 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29598882/aging-resistance-mechanical-properties-and-translucency-of-different-yttria-stabilized-zirconia-ceramics-for-monolithic-dental-crown-applications
#14
E Camposilvan, R Leone, L Gremillard, R Sorrentino, F Zarone, M Ferrari, J Chevalier
OBJECTIVES: The dental market moves towards high-translucency monolithic zirconia dental crowns, which are usually placed either with - or without - a thin glaze layer. The microstructural features and the mechanical performances of these materials are still controversial, as well as their susceptibility to aging. This paper aims at studying these aspects in the current generation of zirconia dental crowns showing different degrees of translucency. METHODS: Four different commercial zirconia materials were investigated, including one standard 'full-strength' 3Y-TZP and three grades with improved translucency...
March 26, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29584553/ultrathin-cad-cam-ceramic-occlusal-veneers-and-anterior-bilaminar-veneers-for-the-treatment-of-moderate-dental-biocorrosion-a-1-5-year-follow-up
#15
T H Resende, K R Reis, L H Schlichting, P Magne
Dental biocorrosion can produce a devastating impact on oral health. The restorative phase of the treatment should not cause additional damage of the remaining sound tooth structure. Ultrathin occlusal veneers are a conservative alternative to traditional onlays and complete crowns for the treatment of severe biocorrosive lesions. This strategy is explained in the present case report through a full-mouth rehabilitation of a patient with moderate biocorrosion. Maxillary anterior teeth were restored using the bilaminar technique (lingual direct composite veneers with labial ceramic veneers) and posterior teeth using ultrathin CAD-CAM ceramic occlusal veneers...
March 27, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29567528/nano-scale-mechanical-behavior-of-pre-crystallized-cad-cam-zirconia-reinforced-lithium-silicate-glass-ceramic
#16
Gabriella A C Springall, Ling Yin
This paper reports on the mechanical behavior of pre-crystallized CAD/CAM zirconia-reinforced lithium silicate glass ceramic (ZLS) using nanoindentation with a Berkovich diamond tip and in situ scanning probe microscopy (SPM). The indentation contact hardness, the elastic modulus, and the elasticity and plasticity of the material were determined using the Oliver-Pharr method, the Sakai model and the Meyer's law at peak loads of 2.5-10 mN and a loading rate of 0.5 mN/s. The load-displacement curves at all applied loads indicate that ZLS deformed plastically without fracture...
March 9, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29563361/dental-implant-treatment-with-computer-assisted-surgery-for-bilateral-agenesis-of-maxillary-lateral-incisors-a-case-report
#17
Hodaka Sasaki, Tomoki Hirano, Syuntaro Nomoto, Yasushi Nishii, Yasutomo Yajima
Here, we report a case of dental implant treatment involving computer-assisted surgery for bilateral agenesis of the maxillary lateral incisors. The patient was a 39-year-old woman with the chief complaint of functional and esthetic disturbance due to maxillary and mandibular malocclusion. The treatment plan comprised non-extraction comprehensive orthodontic treatment and prosthodontic treatment for space due to the absence of bilateral maxillary lateral incisors. A preliminary examination revealed that the mesiodistal spaces left by the absent bilateral maxillary lateral incisors were too narrow for implant placement (right, 5...
2018: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/29561951/in-vitro-effects-of-alcohol-containing-mouthwashes-on-human-enamel-and-restorative-materials
#18
José Eduardo Pelizon Pelino, Alan Passero, Airton Abrahao Martin, Christine Ann Charles
The objective of this study was to evaluate the in vitro effects, including surface morphological characteristics and chemical elemental properties, of different mouthwash formulations on enamel and dental restorative materials, simulating up to 6 months of daily use. Human enamel samples, hydroxyapatite, composite resin, and ceramic surfaces were exposed to 3 different mouthwashes according to label directions - Listerine® Cool Mint®, Listerine® Total Care, and Listerine® Whitening - versus control (hydroalcohol solution) to simulate daily use for up to 6 months...
March 15, 2018: Brazilian Oral Research
https://www.readbyqxmd.com/read/29557400/posterior-atrophic-jaws-rehabilitated-with-prostheses-supported-by-5-%C3%A3-5-mm-implants-with-a-nanostructured-calcium-incorporated-titanium-surface-or-by-longer-implants-in-augmented-bone-3-year-results-from-a-randomised-controlled-trial
#19
Giorgio Gastaldi, Pietro Felice, Valeria Pistilli, Carlo Barausse, Daniela Rita Ippolito, Marco Esposito
PURPOSE: To evaluate whether 5.0 × 5.0 mm dental implants with a novel nanostructured calcium-incorporated titanium surface could be an alternative to implants of at least 10.0 mm long placed in bone augmented with bone substitutes in posterior atrophic jaws. MATERIALS AND METHODS: Forty patients with atrophic posterior (premolar and molar areas) mandibles with 5.0 mm to 7.0 mm bone height above the mandibular canal, and 40 patients with atrophic maxillas with 4...
2018: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29557398/immediately-loaded-zygomatic-implants-vs-conventional-dental-implants-in-augmented-atrophic-maxillae-4-months-post-loading-results-from-a-multicentre-randomised-controlled-trial
#20
Marco Esposito, Rubén Davó, Carlos Marti-Pages, Ada Ferrer-Fuertes, Carlo Barausse, Roberto Pistilli, Daniela Rita Ippolito, Pietro Felice
PURPOSE: To compare the clinical outcome of immediately loaded cross-arch maxillary prostheses supported by zygomatic implants vs conventional implants placed in augmented bone. MATERIALS AND METHODS: A total of 71 edentulous patients with severely atrophic maxillas, who did not have sufficient bone volume to place dental implants or when it was possible to place only two implants in the front area (minimal diameter 3.5 mm and length of 8 mm) and less than 4.0 mm of bone height subantrally, were randomised according to a parallel group design...
2018: European Journal of Oral Implantology
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