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Publication Open Access The potential of copper alloy as alternative material for post and core applications.(2014-09) Somchai Urapepon; สมชาย อุรพีพล; Usanee Peungpaiboon; อุษณีย์ ปึงไพบูลย์; Somchai Urapepon; สมชาย อุรพีพล; Mahidol University. Faculty of Dentistry. Department of ProsthodonticsObjective: The purpose of this study was to investigate the use of copper alloy for dental application. Materials and methods: Three types of copper alloy used in Thailand were selected (Cu-Al, Cu-Al-Ni and Cu-Zn). Ingots of these three alloys... were prepared. The tensile test and potentiodynamic polarization for corrosion test were performed following ISO 1562: 2004 Dentistry-Casting gold alloys and ISO 10271: 2001 Dental metallic materials-Corrosion test method. The ultimate strength, 0Item Metadata only Assessment of mechanical properties and transformation behavior of locally-made ni-ti alloys used in orthodontics(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Nattiree Chiranavanit; Surachai DechkunakornPublication Metadata only Properties of experimental copper-aluminiumnickel alloys for dental post-and-core applications(2014-01-01) Apiwat Rittapai; Somchai Urapepon; Julathep Kajornchaiyakul; Choltacha Harniratisai; Mahidol University; National Metal and Materials Technology Center (MTEC)PURPOSE: This study aimed to develop a copper-aluminium-nickel alloy which has properties comparable to that of dental alloys used for dental post and core applications with the reasonable cost. MATERIALS AND METHODS: Sixteen groups of experimental... copper alloys with variants of 3, 6, 9, 12 wt% Al and 0, 2, 4, 6 wt% Ni were prepared and casted. Their properties were tested and evaluated. The data of thermal, physical, and mechanical properties were analyzed using the two-way ANOVA and Tukey's testItem Metadata only Development of Cu-Al-Ni alloy for dental post and core application(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Apiwat Rittapai; Somchai Urapepol; Widchaya Kanchanavasita; Kallaya SuputtamongkolGenerally, the technique used for replacement of the tooth is "posts and cores". Noble and semi-precious dental alloys have numerous excellent properties, but they are expensive and unaffordable for lots of patients. The copper-aluminum-nickel alloy... is a reasonably priced alternative, and theoretically is perceived as corrosion resistant. Therefore, this situation could potentially be a prototype to develop a base-metal alloy for dental post and core application, and generate dentistry that is moreItem Metadata only Effect of 4-meta/acetone concentration on shear bond strength of heat-cured resin to covalt-chromium alloy(Mahidol University. Mahidol University Library and Knowledge Center, 2007) Sukit Anutongsriwilai; Somchai UrapeponItem Metadata only Bond strength of 8 base metal alloys with 3 porcelains(Mahidol University. Mahidol University Library and Knowledge Center, 2003) Marisa Panchim; Somchai UrapeponPublication Metadata only Development of Metal-resin Composite Restorative Material Part 4 Flexural Strength and Flexural Modulus of Metal-resin Composite using Ag-In Alloy Particles as Filler(2002-01-01) Kiyoshi Kakuta; Somchai Urapepon; Yukio Miyagawa; Hideo Ogura; Masahiko Yamanaka; Chatcharee Suchatlampong; Apiwat Rittapai; Nippon Dental University; Mahidol UniversityThe flexural strength and flexural modulus of an experimental metal-resin composite, which used Ag-In alloy particle as the filler, were evaluated. The effect of acid treatment and heat treatment on the Ag-In alloy particle was investigated... of HCl of the acid treatment. A metal-resin composite, which used acid-treated and 350°C heat-treated Ag-In alloy fillers, matched the requirement of strength of ISO 4049. The average of flexural modulus of the experimental metal-resin composite was 9Publication Metadata only Quantitative analysis of metallic artifacts caused by dental metals: Comparison of cone-beam and multi-detector row CT scanners(2011-12-01) Jira Chindasombatjaroen; Naoya Kakimoto; Shumei Murakami; Yoshinobu Maeda; Souhei Furukawa; Osaka University; Mahidol UniversityObjectives: To quantitatively compare the streak artifacts produced by dental metals in a cone-beam computed tomography (CBCT) device and a multi-detector row computed tomography (MDCT) scanner in relation to metal types and imaging parameters.... Methods: Cubes of aluminum, titanium, cobalt-chromium alloy, and type IV gold alloy were scanned with CBCT and MDCT scanners at tube voltages of 80 and 100 peak kV (kVp), and currents of 100 and 170 mAs by MDCT, and 102 and 170 mAs by CBCT. Artifact areasItem Metadata only Evaluation of heat polymerized polymethyl methacrylate (PMMA) and ethyl vinyl acetate (EVA) for attenuation of secondary electron released from gold alloy crown after being exposed to Co-60 external beam radiation.(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Fatmasari, Fahima, 1979-; Ladawan NarkwongPublication Open Access Effect of cement film thickness on shear bond strengths of two resin cements.(2014-05) Somchai Urapepon; สมชาย อุรพีพล; Wutipong Luesak; Chatcharee Suchatlampong; ชัชรี สุชาติล้ําพงศ์; Somchai Urapepon; สมชาย อุรพีพล; Mahidol University. Faculty of Dentistry. Department of ProsthodonticsObjective: The purpose of this study was to determine the effect of cement thickness on the shear bond strength of two commercial adhesive resin cements, Panavia-F and Super-Bond C&B when used to bond nickel-chromium alloy to bovine dentine.... Materials and methods: Ni-Cr alloy discs, Ø5x3 mm and bovine teeth (120 pairs) were bonded together by two different resin cements (Super Bond C&B and Panavia F) at four different film thicknesses (50, 100, 150 and 200 micrometers). After bonding