The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of soldering techniques and gapdistance on tensile strength of soldered Ni-Cr alloy joint

  • Lee, Sang-Yeob (DepartmentofProsthodontics,CollegeofDentistry,DankookUniversity) ;
  • Lee, Jong-Hyuk (DepartmentofProsthodontics,CollegeofDentistry,DankookUniversity)
  • Received : 2010.09.07
  • Accepted : 2010.12.01
  • Published : 2010.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSE. The present study was intended to evaluate the effect of soldering techniques with infrared ray and gas torch under different gap distances (0.3 mm and 0.5 mm) on the tensile strength and surface porosity formation in Ni-Cr base metal alloy. MATERIALS AND METHODS. Thirty five dumbbell shaped Ni-Cr alloy specimens were prepared and assigned to 5 groups according to the soldering method and the gap distance. For the soldering methods, gas torch (G group) and infrared ray (IR group) were compared and each group was subdivided by corresponding gap distance (0.3 mm: G3 and IR3, 0.5 mm: G5, IR5). Specimens of the experimental groups were sectioned in the middle with a diamond disk and embedded in solder blocks according to the predetermined distance. As a control group, 7 specimens were prepared without sectioning or soldering. After the soldering procedure, a tensile strength test was performed using universal testing machine at a crosshead speed 1 mm/min. The proportions of porosity on the fractured surface were calculated on the images acquired through the scanning electronic microscope. RESULTS. Every specimen of G3, G5, IR3 and IR5 was fractured on the solder joint area. However, there was no significant difference between the test groups (P > .05). There was a negative correlation between porosity formation and tensile strength in all the specimens in the test groups (P < .05). CONCLUSION. There was no significant difference in ultimate tensile strength of joints and porosity formations between the gas-oxygen torch soldering and infrared ray soldering technique or between the gap distance of 0.3 mm and 0.5 mm.

Keywords

References

  1. Blustein R, DePaul BM, Barnhart RC Jr, Green KA. A reliable technique of post soldering of nonprecious ceramic units. J Prosthet Dent 1976;36:112-4. https://doi.org/10.1016/0022-3913(76)90241-9
  2. Huget EF, Vlica JM, Wall RM. Characterization of two ceramicbase-metal alloys. J Prosthet Dent 1978;40:637-41. https://doi.org/10.1016/0022-3913(78)90061-6
  3. Moffa JP, Lugassy AA, Guckes AD, Gettleman L. An evaluation of nonprecious alloys for use with porcelain veneers. Part I. Physical properties. J Prosthet Dent 1973;30:424-31. https://doi.org/10.1016/0022-3913(73)90164-9
  4. Nikellis I, Levi A, Zinelis S. Effect of soldering on the metalceramic bond strength of an Ni-Cr base alloy. J Prosthet Dent 2005;94:435-9. https://doi.org/10.1016/j.prosdent.2005.09.012
  5. Shillingburg HT, Hobo S, Whitsett LD, Jacobi R, Brackett SE. Fundamentals of Fixed Prosthodontics. 3rd ed. Chicago; Quintessence Publishing; 1997. p. 509.
  6. Anwar EM, Naggar GA. Effect of different gap distances on the tensile strength and microstructure of infra-red soldered joints. Cairo Dent J 2004;20:149-55.
  7. Marshall AG, Goodkind RJ. An investigation of the tensile strength of nickel-chromium alloy dental solder joints. J Prosthet Dent 1984;52:666-72. https://doi.org/10.1016/0022-3913(84)90139-2
  8. Rasmussen EJ, Goodkind RJ, Gerberich WW. An investigation of tensile strength of dental solder joints. J Prosthet Dent 1979;41:418-23. https://doi.org/10.1016/0022-3913(79)90039-8
  9. Watanabe I, Watanabe E, Atsuta M, Okabe T. Tensile strength of soldered gold alloy joints. J Prosthet Dent 1997;78:260-6. https://doi.org/10.1016/S0022-3913(97)70024-6
  10. el-Ebrashi MK, Craig RG, Peyton FA. Experimental stress analysis of dental restorations. VII. Structural design and stress analysis of fixed partial dentures. J Prosthet Dent 1970;23:177-86. https://doi.org/10.1016/0022-3913(70)90295-7
  11. Kaylakie WG, Brukl CE. Comparative tensile strengths of nonnoble dental alloy solders. J Prosthet Dent 1985;53:455-62. https://doi.org/10.1016/0022-3913(85)90624-9
  12. Anusavice KJ, Okabe T, Galloway SE, Hoyt DJ, Morse PK. Flexure test evaluation of presoldered base metal alloys. J Prosthet Dent 1985;54:507-17. https://doi.org/10.1016/0022-3913(85)90423-8
  13. Townsend LW, Vermilyea SG, Griswold WH. Soldering nonnoble alloys. J Prosthet Dent 1983;50:51-3. https://doi.org/10.1016/0022-3913(83)90165-8
  14. Stackhouse JA Jr. Assembly of dental units by soldering. J Prosthet Dent 1967;18:131-9. https://doi.org/10.1016/S0022-3913(67)80055-6
  15. Stade EH, Reisbick MH, Preston JD. Preceramic and postceramic solder joints. J Prosthet Dent 1975;34:527-32. https://doi.org/10.1016/0022-3913(75)90040-2
  16. Willis LM, Nicholls JI. Distortion in dental soldering as affected by gap distance. J Prosthet Dent 1980;43:272-8. https://doi.org/10.1016/0022-3913(80)90401-1
  17. Ryge G, Kozak SF, Fairhurst CW. Porosities in dental gold castings. J Am Dent Assoc 1957;54:746-54. https://doi.org/10.14219/jada.archive.1957.0125
  18. Carlberg T, Wictorin L. Soldering of dental alloys under vacuum by IR-heating. Dent Mater 1986;2:279-83. https://doi.org/10.1016/S0109-5641(86)80043-4
  19. Tehini GE, Stein RS. Comparative analysis of two techniques for soldered connectors. J Prosthet Dent 1993;69:16-9. https://doi.org/10.1016/0022-3913(93)90233-E
  20. Cattaneo G, Wagnild G, Marshall G, Watanabe L. Comparison of tensile strength of solder joints by infrared and conventional torch technique. J Prosthet Dent 1992;68:33-7. https://doi.org/10.1016/0022-3913(92)90280-N
  21. 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. https://doi.org/10.1016/S0022-3913(98)70075-7
  22. Cheng AC, Chai JY, Gilbert J, Jameson LM. Mechanical properties of metal connectors soldered by gas torch versus an infrared technique. J Prosthodont 1993;2:103-9. https://doi.org/10.1111/j.1532-849X.1993.tb00390.x
  23. Ryge G. Dental soldering procedures. Dent Clin North Am 1958;2:747-57.
  24. Anusavice KJ, Shafagh I. Inert gas presoldering of nickelchromium alloys. J Prosthet Dent 1986;55:317-23. https://doi.org/10.1016/0022-3913(86)90111-3
  25. Nicholls JI, Lemm RW. Tensile strength of presoldered and postsoldered joints. J Prosthet Dent 1985;53:476-82. https://doi.org/10.1016/0022-3913(85)90628-6
  26. Sobieralski JA, Brukl CE, Smith NK. Tensile strengths and microscopic analysis of nickel-chromium base metal postceramic solder joints. J Prosthet Dent 1987;58:35-42. https://doi.org/10.1016/S0022-3913(87)80139-7
  27. 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. https://doi.org/10.1016/0022-3913(94)90208-9

Cited by

  1. Study on the effect of soldering methods on the characteristics of the Ni-Cr alloy vol.50, pp.1, 2012, https://doi.org/10.4047/jkap.2012.50.1.53
  2. Comparative Evaluation of Marginal Accuracy of a Cast Fixed Partial Denture Compared to Soldered Fixed Partial Denture Made of Two Different Base Metal Alloys and Casting Techniques: An In vitro Study vol.14, pp.1, 2014, https://doi.org/10.1007/s13191-013-0286-2