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Article: Chemical solubility and flexural strength of zirconia-based ceramics

TitleChemical solubility and flexural strength of zirconia-based ceramics
Authors
Issue Date2007
PublisherQuintessence Publishing Co, Inc. The Journal's web site is located at http://www.quintpub.com
Citation
International Journal Of Prosthodontics, 2007, v. 20 n. 6, p. 587-595 How to Cite?
AbstractPurpose: This study was undertaken to investigate the chemical solubility and flexural strengths of 3 zirconia-based dental ceramics: In-Ceram Zirconia (IZ), In-Ceram 2000 YZ CUBES (YZ Zirconia) (Vita Zahnfabrik), and Cercon (Dentsply). A pressable lithium disilicate-reinforced glass ceramic (IPS Empress 2, Ivoclar Vivadent) was used as a control. Materials and Methods: Ten block specimens (12 × 6 × 4 mm) of each ceramic material were prepared for chemical solubility testing. Each specimen was refluxed in 4% acetic acid solution for 16 hours. The percentage loss of mass and the loss of mass per unit of surface area for each specimen were calculated. Ten barshaped (21 × 5 × 2 mm) and 10 disk-shaped (16 mm diameter, 1.2 mm thickness) specimens of each ceramic material were prepared and tested for uniaxial flexural strength (UFS) and biaxial flexural strength (BFS). X-ray diffraction analyses were conducted to determine the relative amount of the monoclinic phase of the as-sintered and fractured surfaces of the zirconia ceramics. Results: There were no significant differences among the ceramics in chemical solubility by percentage mass or mass/surface area. For UFS, YZ Zirconia (899 ± 109 MPa) > Cercon (458 ± 95 MPa) IZ (409 ± 60 MPa) > Empress 2 (252 ± 36 MPa). For BFS, YZ Zirconia (1,107 ± 116 MPa) > Cercon (927 ± 146 MPa) > IZ (523 ± 51 MPa) > Empress 2 (359 ± 43 MPa). The fractured YZ Zirconia surface contained approximately 5 times as much monoclinic phase compared to that of its intact surface. The fractured IZ and Cercon surfaces contained approximately twice as much monoclinic phase compared to those of intact surfaces. Conclusion: The ceramics tested all satisfied the chemical solubility allowance required of core ceramic material (type I, Class 1 or type II, Class 1) according to the International Organization for Standardization 6872:1995(E) specifications on dental ceramic. The zirconia-based ceramics possessed significantly higher flexural strengths than the control lithium disilicate ceramic. Their clinical application appears sufficiently promising for long-term clinical studies to be undertaken.
Persistent Identifierhttp://hdl.handle.net/10722/66905
ISSN
2015 Impact Factor: 1.487
2015 SCImago Journal Rankings: 0.539
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChai, Jen_HK
dc.contributor.authorChu, FCSen_HK
dc.contributor.authorChow, TWen_HK
dc.contributor.authorLiang, BMHen_HK
dc.date.accessioned2010-09-06T05:50:20Z-
dc.date.available2010-09-06T05:50:20Z-
dc.date.issued2007en_HK
dc.identifier.citationInternational Journal Of Prosthodontics, 2007, v. 20 n. 6, p. 587-595en_HK
dc.identifier.issn0893-2174en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66905-
dc.description.abstractPurpose: This study was undertaken to investigate the chemical solubility and flexural strengths of 3 zirconia-based dental ceramics: In-Ceram Zirconia (IZ), In-Ceram 2000 YZ CUBES (YZ Zirconia) (Vita Zahnfabrik), and Cercon (Dentsply). A pressable lithium disilicate-reinforced glass ceramic (IPS Empress 2, Ivoclar Vivadent) was used as a control. Materials and Methods: Ten block specimens (12 × 6 × 4 mm) of each ceramic material were prepared for chemical solubility testing. Each specimen was refluxed in 4% acetic acid solution for 16 hours. The percentage loss of mass and the loss of mass per unit of surface area for each specimen were calculated. Ten barshaped (21 × 5 × 2 mm) and 10 disk-shaped (16 mm diameter, 1.2 mm thickness) specimens of each ceramic material were prepared and tested for uniaxial flexural strength (UFS) and biaxial flexural strength (BFS). X-ray diffraction analyses were conducted to determine the relative amount of the monoclinic phase of the as-sintered and fractured surfaces of the zirconia ceramics. Results: There were no significant differences among the ceramics in chemical solubility by percentage mass or mass/surface area. For UFS, YZ Zirconia (899 ± 109 MPa) > Cercon (458 ± 95 MPa) IZ (409 ± 60 MPa) > Empress 2 (252 ± 36 MPa). For BFS, YZ Zirconia (1,107 ± 116 MPa) > Cercon (927 ± 146 MPa) > IZ (523 ± 51 MPa) > Empress 2 (359 ± 43 MPa). The fractured YZ Zirconia surface contained approximately 5 times as much monoclinic phase compared to that of its intact surface. The fractured IZ and Cercon surfaces contained approximately twice as much monoclinic phase compared to those of intact surfaces. Conclusion: The ceramics tested all satisfied the chemical solubility allowance required of core ceramic material (type I, Class 1 or type II, Class 1) according to the International Organization for Standardization 6872:1995(E) specifications on dental ceramic. The zirconia-based ceramics possessed significantly higher flexural strengths than the control lithium disilicate ceramic. Their clinical application appears sufficiently promising for long-term clinical studies to be undertaken.en_HK
dc.languageengen_HK
dc.publisherQuintessence Publishing Co, Inc. The Journal's web site is located at http://www.quintpub.comen_HK
dc.relation.ispartofInternational Journal of Prosthodonticsen_HK
dc.subject.meshAnalysis of Varianceen_HK
dc.subject.meshCrystallography, X-Rayen_HK
dc.subject.meshDental Porcelainen_HK
dc.subject.meshDental Stress Analysisen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMicroscopy, Electron, Scanningen_HK
dc.subject.meshPliabilityen_HK
dc.subject.meshSolubilityen_HK
dc.subject.meshZirconiumen_HK
dc.titleChemical solubility and flexural strength of zirconia-based ceramicsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0893-2174&volume=20&spage=587&epage=595&date=2007&atitle=Chemical+solubility+and+flexural+strength+of+zirconia-based+ceramics.en_HK
dc.identifier.emailChu, FCS: cschu@hkucc.hku.hken_HK
dc.identifier.emailChow, TW: twchow@hku.hken_HK
dc.identifier.authorityChu, FCS=rp00035en_HK
dc.identifier.authorityChow, TW=rp00009en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid18069366-
dc.identifier.scopuseid_2-s2.0-36849045738en_HK
dc.identifier.hkuros139930en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-36849045738&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue6en_HK
dc.identifier.spage587en_HK
dc.identifier.epage595en_HK
dc.identifier.isiWOS:000251278500008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChai, J=7202678911en_HK
dc.identifier.scopusauthoridChu, FCS=7201881096en_HK
dc.identifier.scopusauthoridChow, TW=7203012369en_HK
dc.identifier.scopusauthoridLiang, BMH=18234259100en_HK

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