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- Publisher Website: 10.1111/j.1532-849X.2007.00185.x
- Scopus: eid_2-s2.0-34250766149
- PMID: 17451482
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Article: A quality assessment of the casting process on magnetic keepers: Basic science research
Title | A quality assessment of the casting process on magnetic keepers: Basic science research |
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Authors | |
Keywords | Burn-out temperature Casting alloy Investment Magnet |
Issue Date | 2007 |
Publisher | Blackwell 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? |
Abstract | Purpose: 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 Identifier | http://hdl.handle.net/10722/154467 |
ISSN | 2023 Impact Factor: 3.4 2023 SCImago Journal Rankings: 1.475 |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Luk, HWK | en_US |
dc.contributor.author | Pow, EHN | en_US |
dc.contributor.author | Dias, APLH | en_US |
dc.date.accessioned | 2012-08-08T08:25:29Z | - |
dc.date.available | 2012-08-08T08:25:29Z | - |
dc.date.issued | 2007 | en_US |
dc.identifier.citation | Journal Of Prosthodontics, 2007, v. 16 n. 4, p. 249-254 | en_US |
dc.identifier.issn | 1059-941X | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/154467 | - |
dc.description.abstract | Purpose: 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.language | eng | en_US |
dc.publisher | Blackwell Publishing, Inc. The Journal's website is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1532-849X | - |
dc.relation.ispartof | Journal of Prosthodontics | en_US |
dc.subject | Burn-out temperature | - |
dc.subject | Casting alloy | - |
dc.subject | Investment | - |
dc.subject | Magnet | - |
dc.subject.mesh | Calcium Sulfate - Chemistry | en_US |
dc.subject.mesh | Dental Alloys - Chemistry | en_US |
dc.subject.mesh | Dental Casting Investment - Chemistry | en_US |
dc.subject.mesh | Dental Casting Technique - Instrumentation - Standards | en_US |
dc.subject.mesh | Denture Retention - Instrumentation - Standards | en_US |
dc.subject.mesh | Electron Probe Microanalysis | en_US |
dc.subject.mesh | Hot Temperature | en_US |
dc.subject.mesh | Humans | en_US |
dc.subject.mesh | Magnetics - Instrumentation | en_US |
dc.subject.mesh | Materials Testing | en_US |
dc.subject.mesh | Microscopy | en_US |
dc.subject.mesh | Microscopy, Electron, Scanning | en_US |
dc.subject.mesh | Oxygen - Analysis | en_US |
dc.subject.mesh | Silicon Dioxide - Chemistry | en_US |
dc.subject.mesh | Surface Properties | en_US |
dc.subject.mesh | Temperature | en_US |
dc.title | A quality assessment of the casting process on magnetic keepers: Basic science research | en_US |
dc.type | Article | en_US |
dc.identifier.email | Luk, HWK:wkluka@hkucc.hku.hk | en_US |
dc.identifier.email | Pow, EHN:ehnpow@hku.hk | en_US |
dc.identifier.authority | Luk, HWK=rp00008 | en_US |
dc.identifier.authority | Pow, EHN=rp00030 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1111/j.1532-849X.2007.00185.x | en_US |
dc.identifier.pmid | 17451482 | - |
dc.identifier.scopus | eid_2-s2.0-34250766149 | en_US |
dc.identifier.hkuros | 135187 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-34250766149&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 16 | en_US |
dc.identifier.issue | 4 | en_US |
dc.identifier.spage | 249 | en_US |
dc.identifier.epage | 254 | en_US |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Luk, HWK=7006636056 | en_US |
dc.identifier.scopusauthorid | Pow, EHN=6603825799 | en_US |
dc.identifier.scopusauthorid | Dias, APLH=23495523300 | en_US |
dc.identifier.citeulike | 1408101 | - |
dc.identifier.issnl | 1059-941X | - |