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Showing 1 to 11 of 11 for “"all-ceramic"”.
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High elastic modulus nanopowder reinforced resin composites for dental applications
… dollars a year on the market. Among them, all-ceramic dental crowns draw more and more attention and their popularity has risen because of their superior aesthetics and biocompatibility. However, their relatively high failure rate and labor-intensive fabrication procedure still limit their …
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Unterkritisches Rißwachstum von Dentalkeramik am Beispiel von OPTEC OPC
The fatigue strength of the glass ceramic OPTEC OPC can be determined by Strength Probability Time Diagram. For that the following parameters are needed: weibull-modul characteristic strength, strength toughness and parameters of subcritical crack growth. These parameters were determined using …
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Postendodontischer Aufbau von Zähnen mit FRC-Stiften : Ergebnisse einer prospektiven klinischen Studie
… post systems for the restoration of endodontically treated teeth (FRC Postec®, IvoclarVivadent, FL-Schaan und DT Post®, VDW/RTD, F-Saint-Egrève) were compared in a prospective clinical trial with at the Medical Center of the RWTH Aachen University. Between October 2001 and August 2006 a total …
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Survival rate and fracture strength of endodontically treated crowned maxillary incisors with severe defects, restored with different post and core systems after exposure to the artificial mouth.
… size and quality prospectives, were endodontically treated and received a 1.2 mm circular shoulder preparation with a subjective convergence angle of 6°. The crown was cut off 2 mm above the cemento-enamel junction. The samples were randomly divided into 4 groups: cast gold post and core …
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Influence of surface treatment on veneering porcelain shear bond strength to zirconia after cyclic loading
Statement of problem: Yttria-partially stabilized tetragonal zirconia polycrystal (Y-TZP) all-ceramic restorations have been reported to suffer from chipping or cracking of the veneering porcelain (VP) as the most common complication. There is little information in the literature regarding the …
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Tribological and Structural Characterisation of Ceramic on Metal Hip Replacements
A tribological investigation of ceramic on metal hip replacements was carried out using in vitro wear testing methods. Two ceramic materials, pure alumina and an alumina matrix compound (zirconia toughened alumina (ZTA)), were articulated against as-cast CoCrMo alloy cups. The diameter was changed …
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Untersuchung zur Veränderung der mechanischen Festigkeit von In-Ceram-Kronen in Abhängigkeit von der Lagerung in Kunstspeichel
… lamination instead of an injection technique, to allow a higher degree of practical relevance. According to specifications by Vita,both an Incisivus and a Caninus were designed with rounded layers in a four-degree convergence angle. To assure a perfect fitting of the test bodies to the …
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The use of CAD CAM For Fixed Partial Prostheses
… of span length on the fit of three and four unit all zirconia bridges.<br/>4. The effect of veneering on the strength of three unit zirconia bridges.<br/>5. The fit of three unit all zirconia bridges produced by digital and conventional techniques.<br/><br/>For these laboratory studies an ideal …
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Klinische Bewährung von Kronen und Brücken aus einer Lithium-Disilikat-Glaskeramik nach 60-monatiger Beobachtungsdauer
… performance of a lithium-disilicate glass-ceramic (IPS Empress 2, Ivoclar-Vivadent) for crowns and bridges. From December 1997 to June 1999, a total of 184 Empress 2- restorations (138 crowns and 46 FPDs) have been placed in 72 patients. For placement either a dual-curing resin …
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Retrospektive klinische Studie zum Langzeitverhalten von In-Ceram-Einzelzahnkronen über einen Zeitraum von mehr als 10 Jahren
… werden seit über 20 Jahren klinisch angewendet. Allerdings sind bis heute die Ergebnisse zur Erfolgswahrscheinlichkeit dieser Art von Zahnersatz nur mit klinischen Verweildauern mittlerer Größenordnung (über mindestens 3 Jahre) verfügbar. Diese retrospektive Untersuchung evaluiert die …
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High Frequency High-Efficiency Voltage Regulators for Future Microprocessors
… their power consumption has increased dramatically [1][2]. An evolution began in power loss reduction when the high-performance Pentium processor was driven by a non-standard, less-than-5V power supply, instead of drawing its power from the 5V plane on the system board. In order to provide the …