Toughening mechanisms in dental composites

Abi, C.B. Emrullahoglu

doi:10.1016/b978-1-78242-279-2.00012-3

Cited by 3 publications

(2 citation statements)

References 91 publications

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“…Monoclinic zirconia shows a high resistance to cracking and exhibits outstanding properties. Monoclinic zirconia will then transform to octa-coordinated tetragonal at 1170 °C to 2370 °C [11]. This phase transformation improved the mechanical properties of zirconia.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Nur Fatinhanani Fatimah Norsham,

Istikamah Subuki

2024

ARFMTS

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Polymorphic zirconia is economically attractive in various applications due to its low reactivity, high strength, and stability. Zirconia can be synthesized from locally available Amang zircon sand as an inexpensive green alternative as it has a high zirconium content as reported by previous report. Unfortunately, the study was only focused on the formation of zirconium oxychloride despite of high zirconium content from the improved alkali fusion method proposed. Therefore, a further study on zirconia powder calcined in varied temperatures from Amang zirconium oxychloride precursor was done. Amang zirconia powder was then characterized in order to study the effect of temperature on Amang zirconia powder. Elemental analysis showed that zirconium composition was affected by temperature and increased as the temperature increased with the highest zirconium content of 81.28 wt.% with low impurities after calcined at 800 °C for 4 hours. The phase analysis satisfied monoclinic zirconia with minor tetragonal and cubic phase with sharper peaks as calcined temperature increased. Increased tetragonal and cubic phase was observed as the temperature was increased. Morphology analysis showed zirconia powder was angular and pyramidal with large crystal size which led to high tendency of monoclinic phase. Calcination temperature of 800 °C was determined to be the most suitable temperature to calcine high purity zirconia powder using Amang zirconium oxychloride precursor.

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Section: Introductionmentioning

confidence: 99%

“…However, pure tetragonal zirconia is highly unstable at room temperature [12]. Octa-coordinated cubic zirconia is stable at temperatures higher than 2370 °C [11,12]. Like tetragonal zirconia, cubic zirconia cannot maintain its phase at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Nur Fatinhanani Fatimah Norsham,

Istikamah Subuki

2024

ARFMTS

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Microstructural Analysis of Terbium Doped Zirconia and Its Biological Studies

Veerachamy

Rajagopal

2022

Condensed Matter

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Zirconia has its place in the biomedical industry because of its mechanical strength, bio-inertness, and physiochemical properties. Zirconia was synthesized and doped with Terbium (Tb), a lanthanide that was reported to show a photoluminescence property, which was a major characteristic for carcinogenic studies. Zirconia and Tb doped Zirconia were synthesized using the co-precipitation technique and were sintered at a temperature ranging from 900 to 1200 °C. The Zirconia sample and Tb doped Zirconia were thus studied for structural diversities using the X-ray powder diffraction technique (XRD), FTIR, FE-SEM, and TEM. From XRD, Zirconia phase transformation from monoclinic to tetragonal phase was observed, which signified limited fracture, elasticity, and crack formation. It was evident that Terbium stabilized the tetragonal phase of Zirconia, which reportedly shows mechanical properties, which include fracture toughness and flexural strength. The particle size of the Zirconia was comparatively more than the Tb doped Zirconia. The particle size of Zirconia ranged between 176 nm and 393 nm and the particle size of Tb doped Zirconia ranged between 110 nm and 343 nm. The biocompatibility of both the samples was tested using an Mg-63 cell line, and the cell viability was observed to be higher in Tb doped Zirconia when compared to the undoped Zirconia sample.

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The Application of Zirconia in Tooth Defects

Luo¹,

Luo²,

Li³

et al. 2022

Clinical Concepts and Practical Management Techniques in Dentistry

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Dental caries is among the most prevalent chronic diseases of childhood, affecting larger part of children and adults. Non-treated enamel caries can lead to destruction and then spreads into the underlying softer and sensitive dentine layer. Dental restorative materials are applied to treat and reconstruct damaged teeth clinically and recover their functions. Currently, there are various dental restorative materials available, and many appropriate materials are used to restore dental carious teeth. The applicability of biomimetic principles can elicit innovations in restorative dentistry for tooth conservation and preservation. There are three types of materials commonly used in dental restorations: resin, alloys, and ceramic. During the past decade, zirconia-based ceramics have been successfully introduced into the clinic due to acceptable biocompatibility, lower price compared with gold restorations, and better appearance than traditional metal-ceramic restorations. Recently, zirconia restoration is an acceptable treatment option in restorative dentistry and a developing trend in esthetic dentistry.

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Toughening mechanisms in dental composites

Cited by 3 publications

References 91 publications

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Effect of Temperature on Zirconia Powder Synthesized from Amang Zirconium Oxychloride Precursor

Microstructural Analysis of Terbium Doped Zirconia and Its Biological Studies

The Application of Zirconia in Tooth Defects

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