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Article: A quality assessment of the casting process on magnetic keepers: Basic science research

TitleA quality assessment of the casting process on magnetic keepers: Basic science research
Authors
Issue Date2007
PublisherBlackwell Publishing, Inc. The Journal's website is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1532-849X
Citation
Journal Of Prosthodontics, 2007, v. 16 n. 4, p. 249-254 How to Cite?
AbstractPurpose: The objective of this study was to qualitatively investigate the effect of the burn-out (mold) temperature, investment material, and casting alloy on the surface integrity of the Magfit EX keeper. Materials and Methods: Forty-two Magfit EX keepers were waxed-up, invested in five investment materials (Beauty-Cast, Cristobalite, CM-10, Cera-Fina, Castorit-super), and subjected to burn-out temperatures ranging from 450 to 700°C at intervals of 50°C. The keeper samples were then cast into copings with three alloys (Castwell, Protor 3, Optimum) under standard conditions. The keeper surfaces were then examined under a microscope, and the compositions were assessed by an X-ray micro-analyzer in a scanning electron microscope (SEM). A new keeper served as control. Results: At a burn-out temperature of 550°C, the keeper surface started to disintegrate. X-ray micro-analysis showed an increase in oxygen content with increasing temperature. At 700°C, the keeper surface disintegrated, and the composition differed markedly from that of the new keeper. The keeper surfaces were intact with all investments except those with Beauty-Cast. The keeper surfaces were found to be damaged when the casting alloy was Optimum. Conclusions: Beauty-Cast investment with a burn-out temperature of 700°C is unsuitable for casting the Magfit EX keeper-coping unit. Also, high fusing alloys are not recommended for casting Magfit EX keepers. © 2007 by The American College of Prosthodontists.
Persistent Identifierhttp://hdl.handle.net/10722/154467
ISSN
2015 Impact Factor: 1.133
2015 SCImago Journal Rankings: 0.421
References

 

DC FieldValueLanguage
dc.contributor.authorLuk, HWKen_US
dc.contributor.authorPow, EHNen_US
dc.contributor.authorDias, APLHen_US
dc.date.accessioned2012-08-08T08:25:29Z-
dc.date.available2012-08-08T08:25:29Z-
dc.date.issued2007en_US
dc.identifier.citationJournal Of Prosthodontics, 2007, v. 16 n. 4, p. 249-254en_US
dc.identifier.issn1059-941Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/154467-
dc.description.abstractPurpose: The objective of this study was to qualitatively investigate the effect of the burn-out (mold) temperature, investment material, and casting alloy on the surface integrity of the Magfit EX keeper. Materials and Methods: Forty-two Magfit EX keepers were waxed-up, invested in five investment materials (Beauty-Cast, Cristobalite, CM-10, Cera-Fina, Castorit-super), and subjected to burn-out temperatures ranging from 450 to 700°C at intervals of 50°C. The keeper samples were then cast into copings with three alloys (Castwell, Protor 3, Optimum) under standard conditions. The keeper surfaces were then examined under a microscope, and the compositions were assessed by an X-ray micro-analyzer in a scanning electron microscope (SEM). A new keeper served as control. Results: At a burn-out temperature of 550°C, the keeper surface started to disintegrate. X-ray micro-analysis showed an increase in oxygen content with increasing temperature. At 700°C, the keeper surface disintegrated, and the composition differed markedly from that of the new keeper. The keeper surfaces were intact with all investments except those with Beauty-Cast. The keeper surfaces were found to be damaged when the casting alloy was Optimum. Conclusions: Beauty-Cast investment with a burn-out temperature of 700°C is unsuitable for casting the Magfit EX keeper-coping unit. Also, high fusing alloys are not recommended for casting Magfit EX keepers. © 2007 by The American College of Prosthodontists.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing, Inc. The Journal's website is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1532-849X-
dc.relation.ispartofJournal of Prosthodonticsen_US
dc.subject.meshCalcium Sulfate - Chemistryen_US
dc.subject.meshDental Alloys - Chemistryen_US
dc.subject.meshDental Casting Investment - Chemistryen_US
dc.subject.meshDental Casting Technique - Instrumentation - Standardsen_US
dc.subject.meshDenture Retention - Instrumentation - Standardsen_US
dc.subject.meshElectron Probe Microanalysisen_US
dc.subject.meshHot Temperatureen_US
dc.subject.meshHumansen_US
dc.subject.meshMagnetics - Instrumentationen_US
dc.subject.meshMaterials Testingen_US
dc.subject.meshMicroscopyen_US
dc.subject.meshMicroscopy, Electron, Scanningen_US
dc.subject.meshOxygen - Analysisen_US
dc.subject.meshSilicon Dioxide - Chemistryen_US
dc.subject.meshSurface Propertiesen_US
dc.subject.meshTemperatureen_US
dc.titleA quality assessment of the casting process on magnetic keepers: Basic science researchen_US
dc.typeArticleen_US
dc.identifier.emailLuk, HWK:wkluka@hkucc.hku.hken_US
dc.identifier.emailPow, EHN:ehnpow@hku.hken_US
dc.identifier.authorityLuk, HWK=rp00008en_US
dc.identifier.authorityPow, EHN=rp00030en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1532-849X.2007.00185.xen_US
dc.identifier.pmid17451482-
dc.identifier.scopuseid_2-s2.0-34250766149en_US
dc.identifier.hkuros135187-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34250766149&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue4en_US
dc.identifier.spage249en_US
dc.identifier.epage254en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLuk, HWK=7006636056en_US
dc.identifier.scopusauthoridPow, EHN=6603825799en_US
dc.identifier.scopusauthoridDias, APLH=23495523300en_US
dc.identifier.citeulike1408101-

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