Effect of changes in sintering parameters on monolithic translucent zirconia

Ebeid, Kamal; Wille, Sebastian; Hamdy, Amina; Morsi, Tarek Salah; El-Etreby, Amr; Kern, Matthias

doi:10.1016/j.dental.2014.09.003

Cited by 180 publications

(182 citation statements)

References 32 publications

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“…In this study, the Zr1500 also had a lower CR value than Zr1450, indicating that, as the above reports state 27,28) , the level of translucency increases as the sintering temperature is raised. It is thought that in oxide ceramics, pores present between the crystals increase light-scattering and therefore reduce the level of translucency 29) .…”

Section: Resultsmentioning

confidence: 65%

“…It is also reported that translucent Y-TZP develops lower CR values and higher levels of translucency when the sintering temperature is raised from 1,350 to 1,500°C 27) or 1,460 to 1,530°C 28) . In this study, the Zr1500 also had a lower CR value than Zr1450, indicating that, as the above reports state 27,28) , the level of translucency increases as the sintering temperature is raised.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that in oxide ceramics, pores present between the crystals increase light-scattering and therefore reduce the level of translucency 29) . It is assumed that raising the sintering temperature eliminates these pores and increases the density of the Y-TZP, thus reducing light-scattering and resulting in increased translucency 28) . Since the determination of translucency using CR and TP is a relative evaluation, we therefore examined the light transmission of the specimens at various light wavelengths.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Nakamura¹,

Nakano²,

Usami³

et al. 2016

Dent. Mater. J.

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The purpose of this study was to examine the translucency and low-temperature degradation of silica-doped experimental Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) containing almost no alumina. The experimental Y-TZP samples were sintered at either 1,450 or 1,500°C. The samples of commercially available translucent Y-TZP and conventional Y-TZP were used as controls. The contrast ratio (CR) and translucency parameter (TP) were obtained to compare the translucencies. In addition, the specimens were also subjected to an accelerated aging test. The results showed that the experimental Y-TZP sintered at 1,500°C and translucent Y-TZP exhibited almost the same level of translucency. During the accelerated aging test, the translucent Y-TZP underwent a substantial increase in monoclinic content, an index of degradation after the aging test. However, neither the experimental Y-TZP nor the conventional Y-TZP exhibited any appreciable change. It was concluded that the silica-doped Y-TZP will develop translucency and resistance to degradation when sintered at 1,500°C.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Nakamura¹,

Nakano²,

Usami³

et al. 2016

Dent. Mater. J.

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“…Pre-sintering temperature can influence the microstructure of zirconia template, which inevitably will influence the mechanical property 12,13) . Therefore it is possible that pre-sintering temperature can influence the mechanical behavior of graded G/Z structure.…”

Section: Discussionmentioning

confidence: 99%

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Qian

Cui

et al. 2016

Dent. Mater. J.

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To explore the optimal pre-sintering temperature for graded glass/zirconia material, glass/zirconia specimens were prepared and pre-sintered at 900, 1,000 and 1,100°C respectively, glass infiltration and densification at 1,450°C. Monolith Y-TZP specimens were sintered at 1,450°C. Nanoindentation was used to test Young's modulus and Hardness. Compressive strength test and cycling fatigue test were conducted. Nanoindentation test showed graded change of Young's modulus in glass/zirconia structure. The compressive strength and the number of cycles to failure of specimens pre-sintered at 1,000°C were significantly higher than those of Y-TZP and the specimens pre-sintered at 900 and 1,000°C (p<0.05). It is concluded that when the pre-sintering temperature is set at 1,000°C, the graded glass/zirconia structure exhibits the most optimal compressive strength and anti-fatigue property.

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“…Over the last five years, most in vitro studies have focused mainly on the effect of surface treatment on the wear of the material itself and/or antagonists,[24À35] surface roughness, [24,25,27,34,36À38] fracture resistance, [35,39À45] flexural strength, [23,44,46] chipping resistance, [23] compressive strength, [44] elastic modulus, [44] hardness, [33] laser transmission, [47] LTD [48] and CTE-generated stress fields in monolithic zirconia, [49] translucency and colour (Table 1). [35,46,50À56] Although the results from in vitro studies may not fully reflect the clinical performance of the materials due to the complexity of the clinical environment, they have still contributed to the accumulation of a growing body of useful information on the performance of monolithic zirconia.…”

Section: In Vitro Studiesmentioning

confidence: 99%

An overview of monolithic zirconia in dentistry

Malkondu

Tınastepe

Akan

et al. 2016

Biotechnology & Biotechnological Equipment

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Zirconia restorations have been used successfully for years in dentistry owing to their biocompatibility and good mechanical properties. Because of their lack of translucency, zirconia cores are generally veneered with porcelain, which makes restorations weaker due to failure of the adhesion between the two materials. In recent years, all-ceramic zirconia restorations have been introduced in the dental sector with the intent to solve this problem. Besides the elimination of chipping, the reduced occlusal space requirement seems to be a clear advantage of monolithic zirconia restorations. However, scientific evidence is needed to recommend this relatively new application for clinical use. This mini-review discusses the current scientific literature on monolithic zirconia restorations. The results of in vitro studies suggested that monolithic zirconia may be the best choice for posterior fixed partial dentures in the presence of high occlusal loads and minimal occlusal restoration space. The results should be supported with much more in vitro and particularly in vivo studies to obtain a final conclusion.

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Effect of changes in sintering parameters on monolithic translucent zirconia

Cited by 180 publications

References 32 publications

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

An overview of monolithic zirconia in dentistry

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