An overview of zirconia ceramics: Basic properties and clinical applications

Manicone, Paolo Francesco; Iommetti, Pierfrancesco Rossi; Raffaelli, Luca

doi:10.1016/j.jdent.2007.07.008

Cited by 1,129 publications

(838 citation statements)

References 54 publications

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“…Due to their reinforcing and crystalline additives (leucite, alumina, magnesia, magnesium aluminate, lithium disilicate, zirconia, and sanidine) and required reinforcement procedures, ceramics possess different radiopacities (24,25,33,(55)(56)(57)(58)(59)(60)(61)(62)(63)(64)(65). Yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics have the same high levels of radiopacity as metals such as Cr-Ni alloy and gold (24).…”

Section: Ceramics and Metalsmentioning

confidence: 99%

Radiopacity of Dental Materials: An Overview

Pekkan¹

2016

Avicenna J Dent Res

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Context: This study aimed to provide an overview of the literature on the radiopacity of dental materials in order to emphasize its importance. Evidence Acquisition: English-language literature was investigated using manual and electronic searches for the terms "radiopacity," "dental material," "cement," "composite," "ceramic," "endodontic root canal sealer," "bone graft," and "acrylic resin" in the databases of Medline, google scholar, and Scopus up to April 2016. Seventy-nine selected publications, including review articles, original articles, and books, were evaluated. Results: The radiopacity of different dental materials may be lower or higher than that of the replaced tissue depending on the restorative material used. The research revealed that highly-radiopaque materials should not be used in dental restorations, except as bone graft and endodontic root canal filling materials. For most of the dental restorative materials, moderate radiopacity within the range of the replaced dental tissue is recommended. However, the lower radiopacity of polymer-based restorative or prosthetic dental materials is still a significant clinical problem. Conclusions:The author recommends using highly-radiopaque materials whenever possible for treatment of bone defects and root canals. For dental materials that replace clinical crowns, the radiopacity should be within the range of that of the replaced tooth structure (dentin or enamel). The radiopacity of dental cements should be much higher than that of the enamel in order to facilitate detection of the thin cement remnants.

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Section: Ceramics and Metalsmentioning

confidence: 99%

Radiopacity of Dental Materials: An Overview

Pekkan¹

2016

Avicenna J Dent Res

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“…[1][2][3] Monoclinic zirconia exists below a temperature of 1170 C and is the weakest of the 3 allotropes. Tetragonal zirconia occurs within the range of 1170 C to 2370 C, while cubic zirconia is found at temperatures higher than 2370 C.…”

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confidence: 99%

“…Zirconia has high flexural strength and fracture toughness compared with other ceramics and can be used to replace metal frameworks in crowns and fixed dental prostheses. [1][2][3] Ahead of a crack tip, zirconia can undergo transformation toughening by transforming the tetragonal zirconia into monoclinic zirconia. Monoclinic zirconia is less dense than tetragonal zirconia because of a resultant expansion of approximately 4%.…”

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confidence: 99%

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Bartolo

Cassar

Husain

et al. 2017

The Journal of Prosthetic Dentistry

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Statement of problem. Yttria-stabilized zirconia used for the fabrication of crowns and fixed\ud \ud prostheses may require intraoral adjustments after placement and cementation. Grinding and\ud \ud polishing methods may result in changes in the surface characteristics of zirconia.\ud \ud Purpose. The purpose of this in vitro study was to assess the effect of polishing procedures on\ud \ud surface roughness, topographical and phase changes of zirconia, and wear of the opposing dentition.\ud \ud Material and methods. Presintered and precut yttria-stabilized zirconia specimens (10×10×1 mm)\ud \ud were divided into 4 groups (control, Intensiv, Shofu, 3M ESPE) depending on the polishing method\ud \ud used to prepare the specimens. All tests were carried out in triplicate. The specimens were polished\ud \ud depending on the polishing regimen, while the control was left untreated. The specimens were\ud \ud thermocycled for 3000 cycles, with a temperature range of 5C to 55C. The surface roughness,\ud \ud elemental, and phase changes caused by polishing before and after thermocycling were assessed\ud \ud with surface profilometry, energy-dispersive spectroscopy, and X-ray diffraction analysis. The wear on\ud \ud antagonist steatite balls was also measured after mastication simulation. Statistical analysis was\ud \ud performed using 1-way ANOVA and the Tukey post hoc test to perform multiple comparison tests (a=.05).\ud \ud Results. The polishing procedures increased surface roughness (Ra) of yttria-stabilized zirconia from\ud \ud 0.52 for the control specimen to 0.73 for Intensiv, 0.70 for Shofu, and 0.70 for 3M ESPE (P<.05), which\ud \ud was reduced by thermocycling to 0.44 (control), 0.58 (Intensiv), and 0.58 (Shofu) (P<.001), while\ud \ud roughness remained unchanged for 3M ESPE specimens (0.75; P=.452). The deposition of aluminum\ud \ud when using Shofu abrasives and nickel in Intensiv was demonstrated. Phase changes were observed\ud \ud on the zirconia surface with formation of the monoclinic phase in all polishing methods. Specimen\ud \ud aging enhanced the surface phase changes and also induced compressive stresses in zirconia\ud \ud polished with Intensiv. The different polishing protocols did not affect the wear to the antagonist (P>.05).\ud \ud Conclusions. Polishing zirconia increased surface roughness and led to surface phase changes, but\ud \ud wear to the antagonist was not affected.peer-reviewe

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“…Zirconia has mainly been used for implant abutments and superstructures because of its durability, strength, and corrosion resistance 3, 4. At the same time, several implant drills are already commercially available for the same reason.…”

Section: Introductionmentioning

confidence: 99%

Biological Evaluation of Implant Drill Made from Zirconium Dioxide

Akiba

Eguchi

Akiba

et al. 2016

Clin Implant Dent Rel Res

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PurposeZirconia is a good candidate material in the dental field. In this study, we evaluated biological responses against a zirconia drill using a bone cavity healing model.Materials and MethodsZirconia drills, stainless steel drills, and the drilled bone surface were observed by scanning electron microscopy (SEM), before and after cavity preparation. For the bone cavity healing model, the upper first and second molars of Wistar rats were extracted. After 4 weeks, cavities were prepared with zirconia drills on the left side. As a control, a stainless steel drill was used on the right side. At 3, 7, and 14 days after surgery, micro‐CT images were taken. Samples were prepared for histological staining.ResultsSEM images revealed that zirconia drills maintained sharpness even after 30 drilling procedures. The bone surface was smoother with the zirconia drill. Micro‐CT images showed faster and earlier bone healing in the zirconia drill cavity. On H‐E staining, at 7 days, the zirconia drill defect had a smaller blank lacunae area. At 14 days, the zirconia drill defect was filled with newly formed bone.ConclusionsThe zirconia drill induces less damage during cavity preparation and is advantageous for bone healing. (197 words)

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An overview of zirconia ceramics: Basic properties and clinical applications

Cited by 1,129 publications

References 54 publications

Radiopacity of Dental Materials: An Overview

Radiopacity of Dental Materials: An Overview

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Biological Evaluation of Implant Drill Made from Zirconium Dioxide

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