Lifetime estimation of zirconia ceramics by linear ageing kinetics

Zhang, Fei; Inokoshi, Masanao; Vanmeensel, Kim; Meerbeek, Bart Van; Naert, Ignace; Zhang, Fei

doi:10.1016/j.actamat.2015.04.001

Cited by 52 publications

(45 citation statements)

References 39 publications

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“…The observed penetration depth of 6-8 m after a hydrothermal treatment at 85 • C for 60 days is in accordance with extrapolated data from the nowadays available literature (Fig. 6, Table 2) [23,35]. However, some data (e.g.…”

Section: Raman Spectroscopy Of Cross-sectioned Implantssupporting

confidence: 74%

“…For the present experiment, Q was taken as 104 kJ mol −1 , as reported for the same starting powder [23]. From here, it can be calculated that the same L m can be reached for different time and temperature conditions ((t 1 , T 1 ) and (t 2 , T 2 )), that verify:…”

Section: Accelerated Aging ("Hydrothermal Treatment")mentioning

confidence: 98%

“…S = 0.5 m/y at 37 • C) observed for samples aged at body temperature indicate, that the performed aging procedure at 85 • C might not exactly correspond to 40 years of aging at 37 • C [35,36]. Finally, one has to consider that most of the available data were preferably measured on materials where a saturation level was reached in order to have a clear change from the monoclinic to the tetragonal phase [23]. Even if spot res- olution was high, the phase change occurred over a distance of around 2 m (probably due to scattering, the spot size and step length).…”

Section: Raman Spectroscopy Of Cross-sectioned Implantsmentioning

confidence: 99%

See 2 more Smart Citations

Long-term stability of an injection-molded zirconia bone-level implant: A testing protocol considering aging kinetics and dynamic fatigue

et al. 2017

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Section: Raman Spectroscopy Of Cross-sectioned Implantssupporting

confidence: 74%

Section: Accelerated Aging ("Hydrothermal Treatment")mentioning

confidence: 98%

Section: Raman Spectroscopy Of Cross-sectioned Implantsmentioning

confidence: 99%

See 1 more Smart Citation

Long-term stability of an injection-molded zirconia bone-level implant: A testing protocol considering aging kinetics and dynamic fatigue

et al. 2017

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“…(16,17) Some translucency was also obtained by decreasing the alumina content which might compromise the ceramic resistance to hydrothermal degradation. (18) Low temperature degradation of zirconia is a negative phenomenon related to the transformation ability of the tetragonal phase. Studies of the aging of zirconia is therefore an important method to assess the changes that occur to the properties of zirconia and thus expecting its life span.…”

Section: Discussionmentioning

confidence: 99%

Effect of Aging on the Flexural Strength of Translucent Monolithic Yttria Stabilized Zirconia

Moaty

Eldien

2018

Egyptian Dental Journal

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Aim: the purpose of the present study was to investigate the effect of thermal cycling and mechanical loading on the flexural strength of: Zeno Star (T) a translucent monolithic Yttria stabilized zirconia (Y-TZP).Materials and Methods: a total number of 40 fully sintered bar -shaped specimens (18mm x 4mm x 1.2mm) were fabricated. The specimens were divided into 4 groups (n=10) according to the aging time: Group I: is the control group with no aging procedures and was tested after 24 hours. Group II: was subjected to thermal cycling (600 cycles) and load cycling 120.000 cycles equivalent to 6 months of clinical service. Group III: subjected to thermal cycling (1200 cycles) and load cycling 240.000 cycles equivalent to 1 year of clinical service. Group IV: subjected to thermal cycling 6000 thermal cycles and load cycles (1.200.000 cycles) equivalent to 5 years of clinical service. For thermal cycling, all specimens were transferred in hot and cold water baths between 5 and 55°C in one minute cycle for each bath with dwell time of 30 seconds. The flexural strength was determined by three points bending test in a universal testing machine at a cross head speed of 1mm/min. Tertragonal to monoclinic transformations due to thermal cycling and mechanical loading (LTD) was identified with X-ray diffraction (XRD).Results: Comparing the flexural strength of the tested specimens, the mean flexural strength of zirconia in group II (representing six months of clinical service) was significantly higher (1563.7±103.8 MPa ) than that of the control (group I) (1009.7±107.2 MPa) Thermal cycling and mechanical loading equivalent to one year of clinical service (group III) led to significant decrease in the flexural strength (1381±295 MPa) The lowest flexural strength was determined in group IV (833.7±15.2 MPa) where zirconia was subjected to thermal cycling and mechanical loading equivalent to 5 years of clinical service. The relative XRD peak intensity showed that there were some monoclinic transformations at the end of the aging period which is equivalent to 5 years of clinical service.Conclusions: Thermal cycling and mechanical loading caused a reduction in the mean flexural strength at the period equivalent to one year of clinical service. Further decrease of the flexural strength occurred following aging at the period simulating 5 years of clinical service with some phase transformation from tetragonal to monoclinic. (1540)

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“…Entretanto, recentes evidências sobre crescimento da zona de transformação de fase sugerindo um comportamento linear [42][43][44] levaram ao questionamento da validade do processo sigmoidal de transformação de fase e a influência do mecanismo de envelhecimento hidrotérmico (EH) nas propriedades mecânicas da Y-TZP. O comportamento sigmoidal observado na literatura pode ser resultante da limitação da profundidade de penetração dos raios X na amostra 24 .…”

Section: Lista De Tabelasunclassified

Degradação a baixa temperatura da Y-TZP odontológica: análise microestrutural e avaliação das propriedades mecânicas

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Lifetime estimation of zirconia ceramics by linear ageing kinetics

Cited by 52 publications

References 39 publications

Long-term stability of an injection-molded zirconia bone-level implant: A testing protocol considering aging kinetics and dynamic fatigue

Long-term stability of an injection-molded zirconia bone-level implant: A testing protocol considering aging kinetics and dynamic fatigue

Effect of Aging on the Flexural Strength of Translucent Monolithic Yttria Stabilized Zirconia

Degradação a baixa temperatura da Y-TZP odontológica: análise microestrutural e avaliação das propriedades mecânicas

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