Zirconia ceramic dental restorations: Laser machining and optical testing

2009 ◽  
Author(s):  
Duncan P. Hand ◽  
Jonathan P. Parry ◽  
Mateusz Matysiak ◽  
Fraser C. Dear ◽  
J Graham Crowder ◽  
...  
Keyword(s):  
Zirconia Ceramic ◽  
Laser Machining ◽  
Optical Testing ◽  
Dental Restorations

scholarly journals High bonding strength between zirconia and composite resin based on combined surface treatment for dental restorations

2020 ◽  
Vol 18 ◽  
pp. 228080002092865
Author(s):  
Rui li ◽  
Chen Wang ◽  
Shi Qing Ma ◽  
Zi Hao Liu ◽  
Cheng Cheng Zang ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Cycling ◽  
Bonding Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Combined Treatment ◽  
Testing Machine ◽  
Dental Restoration ◽  
Zirconia Ceramic ◽  
Dental Restorations

Zirconia is the preferred material for dental restorations; however, dental restorations are usually affected by zirconia fractures due to chipping and delamination of the veneer ceramic. One effective solution for repairing chemically inert zirconia frameworks is to strongly chemically bond them with the composite resin via surface modification. Thus, the bonding strength between the zirconia and composite resin determines the performance of dental restoration. Herein, we investigate the shear bond strength between zirconia ceramic and two ceramic repair systems before and after thermal cycling based on different surface pretreatments, including air-abrasion and a novel silane coupling agent. When treated with combined sandblasting, novel silane and 10-methacryloyloxydecyl hydrogen phosphate act as a bonding agent for the zirconia surface, and the maximum shear bond strength achieves 27.5 MPa, as measured by a universal testing machine through the average of 16 separate measurements. The results show that the combined treatment resists the interface damage caused by expansion and contraction during thermal cycling. The long-term bond durability is due to the micro-mechanical bond force formed by resin and ceramic, and the chemical bonds of Zr-O-Si at the interface. Results indicate that selective pretreating the surface results in high bond strength between the zirconia and the composite resin, which is meaningful to optimize dental restoration.

Surface Properties of Dental 3Y-TZP with Different Treatments

2014 ◽  
Vol 633 ◽  
pp. 352-356
Author(s):  
Yi Hong Liu ◽  
Yong Wang
Keyword(s):  
Computer Aided Design ◽  
Tetragonal Zirconia ◽  
Optical Microscope ◽  
Milling Process ◽  
Machining Process ◽  
Uniaxial Pressure ◽  
Zirconia Ceramic ◽  
Full Density ◽  
Green Body ◽  
Dental Restorations

The purpose of this study was to study the surface characteristics of the dental 3Y-TZP (3 mol% yttria stabilized tetragonal zirconia) ceramic treated by machining process and analysis what impact on the mechanical properties of the 3Y-TZP dental restorations. Dense core ceramic discs were made of 3Y-TZP. The samples were partially sintered to get part strength after uniaxial pressure moulding. The partially sintering green body could be treated by grinding, incising and milling and incising to simulate the CAD-CAM (computer aided design/computer aidedmanufacturing) process in dentistry. The partially sintering samples were then sintered to achieve full density. The dense sintered ceramics were also treated by grinding and incising to simulate the dental restorations adjusting process in dental clinic. The both surface of thespecimens were studied with an optical microscope and field emission SEM. Bulges were observed on the surface of the sample after uniaxial pressure moulding process. The defects due to partially sintered green body milling process were different from incising process in size and shape. Groves are observed on the surfaces of the samples after grinding process. The conclusions were that (i) machining of the final sintered dental 3Y-TZP ceramic brought more critical damage than the machining of partly-sintered green-bodies; (ii) the milling process ofthe partially sintered green-body brought less damage to the 3Y-TZP samples than the incising process.

Surface Modification of Zirconia (Y-TZP) Ceramics Induced by Pulsed Laser Machining

2015 ◽  
Vol 752-753 ◽  
pp. 481-484 ◽  
Author(s):  
Valery V. Kuzin ◽  
Stanislav Grigoriev ◽  
Mike Fedorov ◽  
Mike Portnoy ◽  
Victor Ermolin
Keyword(s):  
Surface Modification ◽  
Tetragonal Zirconia ◽  
Pulsed Laser ◽  
Scanning Speed ◽  
Control Surface ◽  
Zirconia Ceramic ◽  
Laser Machining ◽  
Attractive Alternative ◽  
Modification Process ◽  
Tetragonal Zirconia Polycrystal

Technological features of pulsed laser machining of yttriastabilized tetragonal zirconia polycrystal (Y-TZP) were studied. The connection between the laser power, scanning speed, laser beam steps and surface state of zirconia ceramic was established. The results of the research showed that pulsed laser machining of this material is an effective tool to control surface modification process and presents an attractive alternative to conventional techniques.

Macro to micro laser machining: A case study

2004 ◽  
Author(s):  
Phillip McMahon ◽  
Richard Muscat ◽  
Peter Vincent ◽  
Dennis Watts ◽  
Alan Wilson
Keyword(s):  
Laser Machining
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