Cast Crowns
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Influence of remaining coronal thickness and height on biomechanical behavior of endodontically treated teeth: survival rates, load to fracture and finite element analysis
Abstract Objective To evaluate the effect of restorative strategy (fiber post vs cast post and core), coronal height (0 mm vs 2 mm) and thickness (higher than 1 mm vs lower than 1 mm) on survival rate, fracture resistance and stress distribution. Material and Methods Seventy-two bovine teeth were cleaned and allocated in six groups (n = 12). Twenty-four te
J. Appl. Oral Sci.. Publicado em: 07/05/2018
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2. Effects of coronal substrates and water storage on the microhardness of a resin cement used for luting ceramic crowns
Composite resin and metallic posts are the materials most employed for reconstruction of teeth presenting partial or total destruction of crowns. Resin-based cements have been widely used for cementation of ceramic crowns. The success of cementation depends on the achievement of adequate cement curing. Objectives: To evaluate the microhardness of Variolink
J. Appl. Oral Sci.. Publicado em: 2014-07
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3. In vitro evaluation of the marginal and internal discrepancies of different esthetic restorations
Objective: This study examined the fit of two types of all-ceramic single crowns and indirect composite resin full coverage crowns. Material and Methods: Thirty intact human mandibular first premolars were selected for this study and prepared using a machine to standardize the dimensions and randomly divided into 3 groups. Slip cast (IC) (In-Ceram Zirc
J. Appl. Oral Sci.. Publicado em: 2013-12
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4. Screw loosening of different UCLA-type abutments after mechanical cycling
AIM: To evaluate the loss of applied torque (detorque) values in cast and pre-machined abutments for external hex abutment/implant interface of single implant-supported prostheses subjected to mechanical cycling. METHODS: Ten metal crowns were fabricated using two types of UCLA abutments: cast and pre-machined with metal base in NiCrTi alloy and tightened to
Braz. J. Oral Sci.. Publicado em: 2013-09
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5. Fracture resistance of endodontically treated teeth restored with different intraradicular posts with different lengths
AIM: This study compared the resistance to fracture of endodontically treated teeth restored with different intraradicular posts with different lengths and full coverage metallic crowns. METHODS: Sixty extracted human canine teeth were randomly divided into 6 groups. Groups CP5, CP75 and CP10 were restored using custom cast post and core (CP) and groups PF5,
Braz. J. Oral Sci.. Publicado em: 2013-03
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6. Wear of double crown systems: electroplated vs. casted female part
OBJECTIVES: The wear of telescopic crowns is a common problem often reducing the patient's satisfaction with the denture and resulting in a renewal of the denture. The study aims to compare the wear behavior of conical crowns using electroplated copings (group E ) with standard telescopic crowns with cast female parts (group C). MATERIAL AND METHODS: 10 coni
Journal of Applied Oral Science. Publicado em: 2012-06
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7. Influence of marginal fit and cement types on microleakage of all-ceramic crown systems
The purpose of this study was to evaluate the effects of both marginal fit and cementing with different luting agents on the microleakage of all-ceramic crown systems. Thirty-six extracted upper central incisors were prepared for full-coverage crowns and were divided into three groups. Group 1: CAD/CAM-fabricated ZrO2, Group 2: Heat-pressed lithium-disilicat
Brazilian Oral Research. Publicado em: 2011-06
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8. Effect of cyclic load on vertical misfit of prefabricated and cast implant single abutment
OBJECTIVES: The purpose of this in vitro study was to evaluate misfit alterations at the implant/abutment interface of external and internal connection implant systems when subjected to cyclic loading. MATERIAL AND METHODS: Standard metal crowns were fabricated for 5 groups (n=10) of implant/abutment assemblies: Group 1, external hexagon implant and UCLA cas
Journal of Applied Oral Science. Publicado em: 2011-02
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9. Effect of phosphate-bonded investments on titanium reaction layer and crown fit
This study analyzed the reaction layer and measured the marginal crown fit of cast titanium applied to different phosphate-bonded investments, prepared under the following conditions (liquid concentration/casting temperature): Rema Exakt (RE) - 100%/237°C, 75%/287°C, Castorit Super C (CS)-100%/70°C, 75%/141°C and Rematitan Plus (RP)- 100%/430°C (special
Brazilian Oral Research. Publicado em: 2010-06
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10. CAD/CAM Zirconia vs. slip-cast glass-infiltrated Alumina/Zirconia all-ceramic crowns: 2-year results of a randomized controlled clinical trial
The aim of this randomized controlled clinical trial was to compare the early clinical outcome of slip-cast glass-infiltrated Alumina/Zirconia and CAD/CAM Zirconia all-ceramic crowns. A total of 30 InCeram® Zirconia and Cercon® Zirconia crowns were fabricated and cemented with a glass ionomer cement in 20 patients. At baseline, 6-month, 1-year, and 2-year
Journal of Applied Oral Science. Publicado em: 2009-02
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11. Evaluation of failure mode of ceramic crowns with and without framework design modification. / Avaliação do modo de falha de coroas cerâmicas com e sem alteração do desenho das infraestruturas
Ceramic crowns have been widely used, however, problems related to brittle fracture of these materials persist, especially in the posterior area. The present study tested the null hypothesis that there were no differences in fatigue resistance related to the framework design as well as to the materials used. One maxillary molar was prepared, reproducing the
Publicado em: 2009
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12. Influência do tipo de retentor intra-radicular e da radioterapia na deformação, resistência e padrão de fratura de diferentes dentes tratados endodonticamente
The aim of this in vitro study was to evaluate the influence of post type and the radiotherapy effect on strain, fracture resistance and fracture pattern for different teeth endodontically treated. 160 human teeth were selected (n=40): In, incisives; Ca, canines; Pm, pre-molar e Mo, molars. After the endodontically treatment, half of samples (n=20) was subje
Publicado em: 2009