نتایج جستجو برای: ceramic crowns

تعداد نتایج: 27230  

Journal: :Acta biomaterialia 2012
Tanapon Sornsuwan Michael V Swain

The objectives of this study were to identify the effect of design parameters, namely marginal thickness, degree of convergence and the different interfacial conditions, on the initial failure load that induces cracking from the margin in glass-simulated dental crowns. Crown-like glass cylinders were prepared to simulate posterior all-ceramic crowns with two different marginal thicknesses (0.8 ...

Journal: :Journal of prosthodontics : official journal of the American College of Prosthodontists 2011
Bin Liu Chenglin Lu Yanling Wu Xiuyin Zhang Dwayne Arola Dongsheng Zhang

PURPOSE This study investigated the effects of luting cement type and thickness on the stress distribution within all-ceramic crowns using finite element analysis. MATERIALS AND METHODS An all-ceramic crown restoration of the mandibular right first molar was prepared according to standard dental processes and scanned using micro-computed tomography. Eight 3D FE models were then developed that...

Journal: :Dental materials journal 2015
Takashi Nakamura Tsuyoshi Sugano Hirofumi Usami Kazumichi Wakabayashi Hiroshi Ohnishi Tohru Sekino Hirofumi Yatani

The purpose of this study is to evaluate the fitting accuracy and fracture resistance of crowns using a hybrid zirconia frame made of both porous and dense zirconia. Commercial semi-sintered zirconia, sintered dense zirconia and sintered hybrid zirconia were used. Sintered zirconia was milled using the CAD/CAM system, and semi-sintered zirconia was milled and sintered to fabricate molar crown f...

2013
Ignacio Farga-Niñoles Rubén Agustín-Panadero Juan L. Román-Rodriguez María F. Solá-Ruíz María Granell-Ruíz Antonio Fons-Font

OBJECTIVES To observe porcelain veneer behavior of zirconia and metal-ceramic full coverage crowns when subjected to compression testing, comparing zirconia cores to metal cores. STUDY DESIGN The porcelain fracture surfaces of 120 full coverage crowns (60 with a metal core and 60 with a zirconia core) subjected to static load (compression) testing were analyzed. Image analysis was performed u...

2016
Jennie Overmeer Birger Narby Lars Hjalmarsson Kristina Arnrup Alf Eliasson

Objective The aim of this study was to evaluate and compare the 5-year survival and complication rate of metal-ceramic (MC) and composite single crowns performed within Public Dental Service, general dentistry, in three Swedish counties and with patients' gender, tooth position, root canal treatment and the presence of a post-and-core taken into account. Methods Data were collected from dental ...

2015
Norbert Cionca Nada Müller Andrea Mombelli

OBJECTIVES The aim of this prospective clinical study is to evaluate the safety and efficacy of a new all-ceramic implant system to replace missing teeth in partially edentulous patients. MATERIAL AND METHODS Thirty-two partially edentulous, systemically healthy patients were treated with 49 two-piece zirconia implants (ZERAMEX(®) T Implant System). Zirconia abutments were connected with adhe...

Journal: :Dental materials journal 2008
Kyu-Bok Lee Charn-Woon Park Kyo-Han Kim Tae-Yub Kwon

This study evaluated the accuracy of marginal and internal fit between the all-ceramic crowns manufactured by a conventional double-layer computer-aided design/computer-aided manufacturing (CAD/CAM) system and a single-layer system. Ten standardized crowns were fabricated from each of these two systems: conventional double-layer CAD/CAM system (Procera) and a single-layer system (Cerec 3D). The...

2013

CAD/CAM technology in dentistry offers high-end ceramic restorations, known for its quality, preciseness, swiftness and repeatability. However, some features are still human-dependent. A young female patient required smile enhancement, since suffering from colour change on three devitalized frontal teeth. After fiber post placement, teeth were prepared for metal-free restoration. Consequently, ...

2016
Shanchuan Zhang Penghua Ma Guanchao Wang Qiang Sun Lili Tian Lili Ma Baohua Xu

To systematically review the randomized controlled trials (RCTs) and compare the survival rates and complications of all-ceramic fixed dental prostheses (FDPs) with those of metal-ceramic FDPs. Eligible studies were retrieved in relevant electronic databases from their inception to June 8th, 2016. Then, quality of the included studies was assessed using Cochrane Collaboration’s tool. Heterogene...

Journal: :The Journal of prosthetic dentistry 2003
Lu Zhi-Yue Zhang Yu-Xing

STATEMENT OF PROBLEM Studies concerning the effects of post-core design and ferrule on the fracture resistance of endodontically treated teeth remain controversial. PURPOSE The purpose of this study was to investigate in vitro the effects of post-core design and ferrule on the fracture resistance of root canal treated human maxillary central incisors restored with metal ceramic crowns. MATE...

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