中山醫學大學機構典藏 CSMUIR:Item 310902500/18273
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    题名: Characteristics of commercial quick-heating phosphate-bonded investments for the accelerated casting technique
    作者: Yang, C.-C.;Yang, H.-H.;Ding, S.-J.;Huang, T.-H.;Kao, C.-T.;Yan, M.
    关键词: Accelerated casting technique;Compressive strength;Phosphate-bonded investment;Setting expansion;Thermal expansion
    日期: 2007
    上传时间: 2017-08-09T04:44:18Z (UTC)
    ISSN: 336572
    摘要: Commercial quick-heating phosphate-bonded investments are frequently used to reduce the operating time during the dental casting process. The aim of this study was to evaluate the characteristics of commercial quick-heating phosphate-bonded investments. Method and Materials: Characterization of the 2 investments (Maruvest-Speed [Megadental] and Z4 C&B [Neirynck and Vogt]) focused on the setting expansion, compressive strength, thermal expansion, and surface roughness. Two different heating methods- the quick-heating method (QHM) and conventional heating method (CHM)-were used with the investments. The dimensional accuracy and surface roughness of the nickel- chromium alloy castings obtained from the investments were also examined. Results: The Maruvest-Speed investment had a significantly greater setting expansion (2.2%) than the Z4 investment (1.1%) after a 30-minute setting time. The fired strength of both investments was greater with QHM (21.2 to 27.7 MPa) than with CHM (13.8 to 17.9 MPa). The thermal expansion of the Maruvest-Speed investment and Z4 with QHM was 1.7% and 1.4%, respectively. There was no significant difference in surface roughness of the castings between samples treated with QHM and CHM. The dimensional accuracy of the castings was larger in length and slightly deformed in bend. Conclusion: The characteristics of the 2 commercial quick-heating phosphate-bonded investments for the accelerated casting technique may be acceptable. © 2007 by Quintessence Publishing Co Inc.
    URI: http://dx.doi.org/
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-34648846773&partnerID=40&md5=baa12543e74dd2646d1877eeacf9a71a
    https://ir.csmu.edu.tw:8080/ir/handle/310902500/18273
    關聯: Quintessence International 38(5) ,271-278
    显示于类别:[牙醫學系暨碩士班] 期刊論文

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