نتایج جستجو برای: ceramic crowns

تعداد نتایج: 27230  

2017
Marcos Daniel Septimio Lanza Marcello Rubens Barsi Andreeta Thiago Amadei Pegoraro Luiz Fernando Pegoraro Ricardo Marins De Carvalho

OBJECTIVE Due to increasing of aesthetic demand, ceramic crowns are widely used in different situations. However, to obtain long-term prognosis of restorations, a good conversion of resin cement is necessary. To evaluate the degree of conversion (DC) of one light-cure and two dual-cure resin cements under a simulated clinical cementation of ceramic crowns. MATERIAL AND METHODS Prepared teeth ...

2013
Kallaya Suputtamongkol Chantana Tulapornchai Jatuphol Mamani Wannaporn Kamchatphai Noparat Thongpun

PURPOSE The objective of this study was to determine the effect of the color of a background substructure on the overall color of a zirconia-based all-ceramic crown. MATERIALS AND METHODS Twenty one posterior zirconia crowns were made for twenty subjects. Seven premolar crowns and six molar crowns were cemented onto abutments with metal post and core in the first and second group. In the thir...

2015
Rubén Agustín-Panadero Rocío Mateos-Palacios Juan-Luis Román-Rodríguez María-Fernanda Solá-Ruíz Antonio Fons-Font

The purpose of the present study is to evaluate the fracture load of composite-based repairs to fractured zirconium oxide (Z) crowns and to ceramic-fused-to-metal (CM) crowns, comparing different mechanical surface preparation methods. A total of 75 crowns were repaired; samples then underwent dynamic loading and thermocycling. Final fracture load values for failure of the repaired crowns were ...

Journal: :Dental materials journal 2007
Futoshi Komine Takayuki Iwai Kazuhisa Kobayashi Hideo Matsumura

The present study evaluated the marginal and internal adaptation of single-tooth zirconium dioxide (ZrO2) ceramic copings or crowns with three different finish line designs. Twenty-four steel dies were prepared for maxillary central incisor crowns with the following finish line designs: shoulder (S), rounded shoulder (RS), and chamfer (C) preparations. Twenty-four standardized ZrO2 ceramic copi...

Journal: :Journal of prosthodontics : official journal of the American College of Prosthodontists 2015
Aslı Akın Suna Toksavul Muhittin Toman

PURPOSE The aims of this randomized-controlled clinical trial were to compare marginal and internal adaptation of all-ceramic crowns fabricated with CAD/CAM and heat-pressed (HP) techniques before luting and to evaluate the clinical outcomes at baseline and at 6, 12, and 24 months after luting. MATERIALS AND METHODS Fifteen CAD/CAM (CC) and 15 HP all-ceramic crowns were placed in 15 patients....

Journal: :The journal of contemporary dental practice 2008
Suat Gokce Emine Celik-Bagci Ilser Turkyilmaz

AIM The aim of this study was to investigate the influence of three different thicknesses of In-Ceram core on the load at fracture of all-ceramic crowns. METHODS AND MATERIALS Thirty standardized crown-shaped nickel-chromium alloy dies were fabricated using a milling machine. Twenty dies were prepared with a 1 mm shoulder for Groups A and B. The only difference in the ten dies used for Group ...

2016
Vinej Somaraj

The dental practice is not only about prevention and treatment of oral diseases but also the fulfillment of demands of all who seek oral care, of which esthetics weighs more importance than any. To achieve excellence in the delivery of dental care, dentists rely on the vast array of modern advances in dental materials and restoration fabrication technologies. Need for more esthetical, metal-fre...

2015
Mª Fernanda Solá-Ruiz Rubén Agustín-Panadero Carlos Campos-Estellés Carlos Labaig-Rueda

BACKGROUND The aim of this in vitro study was to compare the mechanical failure behavior and to analyze fracture characteristics of metal ceramic crowns with two veneering systems - press-on metal (PoM) ceramic versus a conventional veneering system - subjected to static compressive loading. MATERIAL AND METHODS Forty-six crowns were constructed and divided into two groups according to porcel...

Journal: :The Journal of prosthetic dentistry 2015
Paul de Kok Cornelis J Kleverlaan Niek de Jager Ruud Kuijs Albert J Feilzer

STATEMENT OF PROBLEM The fracture of implant-supported restorations, especially of the veneering layer, is a common problem in dentistry. Monolithic ceramic or resin restorations might help solve this problem. PURPOSE The purpose of this in vitro study was to obtain additional insight into the risk of fracture of implant-supported restorations. MATERIAL AND METHODS Identical crowns (n=10) o...

2017
Takashi NAKAMURA Kazumichi WAKABAYASHI Yoshiko KAWAMURA

also often required even in the posterior region. However, all-ceramic crowns pose some problems, including weak mechanieal properties and occurrence of cracks or pores in the erown that could ultimately lead to fracture oi' the restorationii'. Thus far, all-ceramic crowns have been fabricated by firing porcelain manuaNy onto a refractory die, or by casting or heat-pressing the cerarnics. Howev...

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