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- Publisher Website: 10.1016/S0300-5712(96)00071-1
- Scopus: eid_2-s2.0-0031613123
- WOS: WOS:000071451500008
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Article: A new method for casting discrepancy: some results for a phosphate-bonded investment
Title | A new method for casting discrepancy: some results for a phosphate-bonded investment |
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Authors | |
Keywords | Casting Investment Phosphate-bonded Accuracy |
Issue Date | 1998 |
Publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent |
Citation | Journal of Dentistry, 1998, v. 26 n. 1, p. 59-68 How to Cite? |
Abstract | Objectives: An accurate and realistic casting discrepancy method applicable to base metal alloys has hitherto been lacking. The purpose of this study was to develop a method for determining casting discrepancy free of interference from oxide, slag and surface defects, working under realistic conditions. In addition, a variable was sought that could be used for calibrating the casting process to allow for local errors.
Methods: A crown pattern was designed to incorporate circular V-grooves on the margin and the inside surface of the occlusal part for determination of the ‘groove root diameter’ (GRD) with a measuring microscope. Castings using a phosphate-bonded investment were made to test the effects of ‘hygroscopic’ expansion, burn-out temperature, powder/liquid ratio and groove location.
Results: The tested investment variables showed the expected effects, but the distortion between marginal and pulpal regions was clearly shown, as were interactions between some variables. ‘Special liquid’ proportion appears to be a good candidate variable for process calibration.
Conclusions: The GRD method was shown to be sensitive and reproducible. It is also applicable to many other casting systems, and in particular to monitoring overall process discrepancy, i.e. from tooth preparation to casting, which is suggested as being the key issue. |
Persistent Identifier | http://hdl.handle.net/10722/222200 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 1.313 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Ho, EKH | - |
dc.contributor.author | Darvell, BW | - |
dc.date.accessioned | 2016-01-04T02:14:08Z | - |
dc.date.available | 2016-01-04T02:14:08Z | - |
dc.date.issued | 1998 | - |
dc.identifier.citation | Journal of Dentistry, 1998, v. 26 n. 1, p. 59-68 | - |
dc.identifier.issn | 0300-5712 | - |
dc.identifier.uri | http://hdl.handle.net/10722/222200 | - |
dc.description.abstract | Objectives: An accurate and realistic casting discrepancy method applicable to base metal alloys has hitherto been lacking. The purpose of this study was to develop a method for determining casting discrepancy free of interference from oxide, slag and surface defects, working under realistic conditions. In addition, a variable was sought that could be used for calibrating the casting process to allow for local errors. Methods: A crown pattern was designed to incorporate circular V-grooves on the margin and the inside surface of the occlusal part for determination of the ‘groove root diameter’ (GRD) with a measuring microscope. Castings using a phosphate-bonded investment were made to test the effects of ‘hygroscopic’ expansion, burn-out temperature, powder/liquid ratio and groove location. Results: The tested investment variables showed the expected effects, but the distortion between marginal and pulpal regions was clearly shown, as were interactions between some variables. ‘Special liquid’ proportion appears to be a good candidate variable for process calibration. Conclusions: The GRD method was shown to be sensitive and reproducible. It is also applicable to many other casting systems, and in particular to monitoring overall process discrepancy, i.e. from tooth preparation to casting, which is suggested as being the key issue. | - |
dc.language | eng | - |
dc.publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent | - |
dc.relation.ispartof | Journal of Dentistry | - |
dc.rights | © <year>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.subject | Casting | - |
dc.subject | Investment | - |
dc.subject | Phosphate-bonded | - |
dc.subject | Accuracy | - |
dc.title | A new method for casting discrepancy: some results for a phosphate-bonded investment | - |
dc.type | Article | - |
dc.identifier.email | Darvell, BW: hrdubwd@hkucc.hku.hk | - |
dc.identifier.authority | Darvell, BW=rp00007 | - |
dc.identifier.doi | 10.1016/S0300-5712(96)00071-1 | - |
dc.identifier.scopus | eid_2-s2.0-0031613123 | - |
dc.identifier.hkuros | 31469 | - |
dc.identifier.volume | 26 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 59 | - |
dc.identifier.epage | 68 | - |
dc.identifier.isi | WOS:000071451500008 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0300-5712 | - |