TODENTJ-25-03-2019_TODENTJ-2-109 1553505012 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 11 07 2008 2 1 Ikuya Watanabe Cameron Wallace The objective of this study was to investigate the joint properties between cast gold alloys and Co-Cr alloy laser-welded by Nd:YAG laser. Cast plates were fabricated from three types of gold alloys (Type IV, Type II and low-gold) and a Co-Cr alloy. Each gold alloy was laser-welded to Co-Cr using a dental laser-welding machine. Homogeneously-welded and non-welded control specimens were also prepared. Tensile testing was conducted and data were statistically analyzed using ANOVA. The homogeneously-welded groups showed inferior fracture load compared to corresponding control groups, except for Co-Cr. In the specimens welded heterogeneously to Co-Cr, Type IV was the greatest, followed by low-gold and Type II. There was no statistical difference (P<0.05) in fracture load between Type II control and that welded to Co-Cr. Higher elongations were obtained for Type II in all conditions, whereas the lowest elongation occurred for low-gold welded to Co-Cr. This study indicated that, of the three gold alloys tested, the Type IV gold alloy was the most suitable alloy for laser-welding to Co-Cr. 11 07 2008 109 113 TODENTJ-2-109 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2008-3-28 2008-7-14 2008-9-1 2008-11-07 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210600802010109 1553505012 https://opendentistryjournal.com/VOLUME/2/PAGE/109/ https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.pdf https://opendentistryjournal.com/contents/volumes/V2/TODENTJ-2-109/TODENTJ-2-109.xml O'Brien. Dental materials and their selection In: Base metal casting alloys . 3rd ed. Chicago: IL: Quintessence Publishing 2002; pp. pp 225-38. J Oral Rehabil Hassan L 32 772 2005 Hassan L, Juszczyk AS, Clark RK. Immediate replacement of removable partial dentures with cobalt-chromium frameworks rationale technology and a case report J Oral Rehabil 2005; 32 : 772-5. J Oral Rehabil Koke U 31 477 2004 Koke U, Wolf A, Lenz P, Gilde H. In vitro investigation of marginal accuracy of implant-supported screw-retained partial dentures J Oral Rehabil 2004; 31 : 477-82. J Prosthet Dent Chaves M 79 677 1998 Chaves M, Vermilyea SG, Papazoglou E, Brantley WA. Effects of three soldering techniques on the strength of high-palladium alloy solder joints J Prosthet Dent 1998; 79 : 677-84. J Prosthodont Dominici JT 4 101 1995 Dominici JT, Sobczak KP, Mitchell RJ. A comparison of infrared- and torch-soldering of Au-Pd and Co-Cr metal-ceramic alloys using a high-fusing solder J Prosthodont 1995; 4 : 101-. J Prosthet Dent Lima Verde MA 71 339 1994 Lima Verde MA, Stein RS. Evaluation of soldered connectors of two base metal ceramic alloys J Prosthet Dent 1994; 71 : 339-44. J Prosthet Dent Cheng AC 72 8 1994 Cheng AC, Chai JY, Gilbert J, Jameson LM. Investigation of stiffness and microstructure of joints soldered with gas-oxygen torch and infrared methods J Prosthet Dent 1994; 72 : 8-15. Am J Ortho Donovan MT 85 207 1984 Donovan MT, Lin JJ, Brantley WA, Conover JP. Weldability of beta titanium arch wires Am J Ortho 1984; 85 : 207-16. Brazil Dent J Rocha R 17 20 2006 Rocha R, Pinheiro AL, Villaverde AB. Flexural strength of pure Ti, Ni-Cr and Co-Cr alloys submitted to NdYAG laser or TIG welding Brazil Dent J 2006; 17 : 20-3. Dent Dialog Mosch J 4 37 2004 Mosch J, Hoffmann A, Hopp M. Lightning in a bottle Dent Dialog 2004; 4 : 37-51. Dent Dialog Lindemann W 4 28 2004 Lindemann W. Comparison of the material quality of welded dental alloys plasma vs laser Dent Dialog 2004; 4 : 28-33. J Biomed Mater Res Iijima M 84B 147 2008 Iijima M, Brantley WA, Yuasa T, Muguruma T, Kawashima I, Mizoguchi I. Joining characteristics of orthodontic wires with laser welding J Biomed Mater Res 2008; 84B : 147-53. J Prosthodont Watanabe I 16 365 2007 Watanabe I, Chang J, Chiu Y. Dimensional change of laser-welded gold alloy induced by heat treatment J Prosthodont 2007; 16 : 365-9. J Prosthodont Kuo SL 15 264 2006 Kuo SL, El-Gendy T, Chou J, Miller RB. Fabrication of a laser-welded fixed-detachable prosthesis for immediate loading J Prosthodont 2006; 15 : 264-9. Dent Mater J Srimaneepong V 24 541 2005 Srimaneepong V, Yoneyama T, Kobayashi E, Doi H, Hanawa T. Mechanical strength and microstructure of laser-welded Ti-6Al-7Nb alloy castings Dent Mater J 2005; 24 : 541-9. J Prosthet Dent Suzuki Y 91 418 2004 Suzuki Y, Ohkubo C, Abe M, Hosoi T. Titanium removable partial denture clasp repair using laser welding a clinical report J Prosthet Dent 2004; 91 : 418-20. J Prosthodont Ishikawa M 11 49 2002 Ishikawa M, Kashiwabara T, Ishida O, Ichikawa T. Installing magnetic keepers using laser welding J Prosthodont 2002; 11 : 49-52. Dent Mater Liu J 18 143 2002 Liu J, Watanabe I, Yoshida K, Atsuta M. Joint strength of laser-welded titanium Dent Mater 2002; 18 : 143-8. J Prosthet Dent Chai T 79 477 1998 Chai T, Chou C. Mechancial properties of laser-welded cast titanium points under different conditions J Prosthet Dent 1998; 79 : 477-83. J Prosthet Dent Berg E 74 250 1995 Berg E, Wagner W, Davik G, Doots ER. Mechanical properties of laser-welded cast and wrought titanium J Prosthet Dent 1995; 74 : 250-7. Quint Int Watanabe I 38 41 2007 Watanabe I, Baba N. Effect of welding parameters on penetration of Nd YAG laser into cast Ti and Au- and Ag-based alloys Quint Int 2007; 38 : 41-6. J Biomed Mater Res Baba N 72B 64 2005 Baba N, Watanabe I. Penetration depth into dental casting alloys by Nd YAG laser J Biomed Mater Res 2005; 72B : 64-8. Quint Dent Tech Togaya T 24 740 1999 Togaya T, Shinosaki T. Introduction to laser welding in dentistry (1) Quint Dent Tech 1999; 24 : 740-49.