Results 1 to 10 of about 16,738 (170)

Fracture Resistance of CAD/CAM-Fabricated Zirconia and Lithium Disilicate Crowns with Different Margin Designs: Implications for Digital Dentistry [PDF]

open access: yesJournal of Functional Biomaterials
Objective: This in vitro study aimed to evaluate the influence of cervical margin design—tangential versus chamfer—on the fracture resistance of monolithic crowns fabricated from lithium disilicate and zirconia ceramics.
Tareq Hajaj   +10 more
doaj   +2 more sources

Comparison of Chamfer and Deep Chamfer Preparation Designs on the Fracture Resistance of Zirconia Core Restorations

open access: yesJournal of Dental Research, Dental Clinics, Dental Prospects, 2011
Background and aims. One of the major problems of all-ceramic restorations is their probable fracture under occlusal force. The aim of the present in vitro study was to compare the effect of two marginal designs (chamfer and deep chamfer) on the ...
Ezatollah Jalalian   +2 more
doaj   +3 more sources

Impact of finish line designs on the adaptation of ceramic fixed dental prostheses: a systematic review and network meta-analysis [PDF]

open access: yesBMC Oral Health
Background Insufficient marginal and internal adaptation can lead to secondary caries, pulp infection, periodontal disease, and tooth loss. This network meta-analysis (NMA) assessed the impact of various finish line designs on the marginal and internal ...
Adrienn Pál   +9 more
doaj   +2 more sources

Marginal adaptation of different monolithic zirconia crowns with horizontal and vertical finish lines: A comparative in vitro study [PDF]

open access: yesJournal of Dental Research, Dental Clinics, Dental Prospects, 2023
Background. This study evaluated the influence of different tooth preparation techniques and zirconia materials on marginal adaptation. Methods. Forty-eight healthy human maxillary first premolars were divided into two primary groups based on preparation
Mohammed Qasim Nasir, Alaa Jawad kadhim
doaj   +1 more source

Finite Element Analysis of the Influence of Chamfer Hub Geometry on the Stress Concentrations of Shrink Fits

open access: yesApplied Sciences, 2023
The theoretical expressions commonly used in the design of interference fits do not take into account the huge stress concentrations located at the edges of the hub.
Eulalia Izard   +3 more
doaj   +1 more source

Comparative Studies on a Chamfer Technology and a Convex Roll Technology During the Soft Reduction Process [PDF]

open access: yesArchives of Metallurgy and Materials, 2021
To comprehensively investigate the diversity of a chamfer technology and a convex roll technology under the same soft reduction process (i.e., section size, reduction amount, casting speed and solid fraction), a three-dimensional mechanical model was ...
Nanfu Zong, Tao Jing, Yang Liu
doaj   +1 more source

A Systematic Review of Cementation Techniques to Minimize Cement Excess in Cement-Retained Implant Restorations

open access: yesMethods and Protocols, 2022
Background: The most used types of retention of implant-supported prostheses are screw-retained or cement-retained restorations. The advantages and disadvantages of both have been identified by various authors over the years.
Rodolfo Reda   +6 more
doaj   +1 more source

AUTOLISP FUNCTION FOR DIMENSIONING CHAMFERS IN AUTOCAD

open access: yesJournal of Industrial Design and Engineering Graphics, 2021
AutoCAD, one of the most popular drawing programs, has enriched over time the facilities offered in making drawings in terms of how to use different graphics, symbols, accuracy, speed, interface, etc.
Iulius Stroe, Elena Ionita
doaj   +2 more sources

Influence of Interference Fit and Temperature on High-Speed Permanent Magnet Motor

open access: yesApplied Sciences, 2023
A high-speed permanent magnet motor is the core driving component of a centrifugal air compressor. The power of the centrifugal air compressor is output by the motor.
Yiming Zeng   +6 more
doaj   +1 more source

Wideband Circularly Polarized Magneto-Electric Dipole $1\times2$ Antenna Array for Millimeter-Wave Applications

open access: yesIEEE Access, 2020
A novel wideband circularly polarized (CP) magneto-electric (ME) dipole 1 × 2 antenna array for millimeter-wave applications is presented in this paper.
Ying-Fang Wang   +4 more
doaj   +1 more source

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