ESCA Study on Dental Alloy Surfaces Modified by Ga-Sn Alloy

Abstract

A new, simple surface modification method for adherend metals has been developed. It gives high bond strength and superior water durability to dental precious-metal alloys bonded with 4-META/ MMA-TBB resin. However, there was no effect on the bonding of Ag-In-Zn alloy and base-metal alloys. In the present study, the alloy surfaces modified by the new method were analyzed by ESCA and SEM for determination of details of the modification effect.

A new alloying layer containing Ga and Sn was formed on the precious-metal alloys. The main factor for excellent adhesion to be achieved was the formation of a very thin layer of Ga₂O₃ and SnO₂, less than 1-2 nm thick, on the alloy surface. A thicker modified layer, as formed on the Ag-In-Zn and Ni-Cr alloys, led to low bonding ability.

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References

Ansell RO , Dickinson T. , Povey AF , Sherwood Pma (1977). X-ray photoelectron spectroscopic studies of tin electrodes after polarization in sodium hydroxide solution. J Electrochem Soc 124:1360-1365.

Brundle CR (1974). The application of electron spectroscopy to surface studies. J Vac Sci Technol 11:212-224.

Doi M. (1985). Tensile adhesive strength of dental resin cements to dental alloy surface-adhesion to Type II dental gold alloy. Jpn J Conserv Dent 28:956-967.

Hirokawa K. (1982). Surface analysis by XPS, AES, and SIMS. Bull Jpn Inst Met 21:885-890.

Holm R. , Storp S. (1976). ESCA studies of chemical shifts for metal oxides . Appl Phys 9:217-222.

Kondo Y. , Yamashita A. , Suzuki K. (1988). Pre-treatment of dental alloy for adhesive restorations . Jpn J Dent Mater 7:13-19.

Musil R. (1987). Clinical verification of the silicoater technique . Results of three-years' experience. Dental Lab 35:1709-1715.

Ohno H. ( 1990). A new conversion method of metal surfaces for resin bonding-conversion effects for pure metals in dental precious metal alloys. Dentistry in Japan 27:101-108.

Ohno H. , Araki Y. , Endo K. ( 1989). A new conversion method for adhering metal surfaces to improve adherence with dental adhesive resins and polyelectrolyte cements . Trans Int Cong Dent Mater (Nov):241-242.

10.

Ohno H. , Araki Y. , Endo K. ( 1992). A new method for promoting adhesion between precious metal alloys and dental adhesives. J Dent Res 71:1326-1331.

11.

Schon G. (1973). Auger and direct electron spectra in x-ray photoelectron studies of zinc, zinc oxide, gallium and gallium oxide. J Electron Spect and Related Phenom 2:75-86.

12.

Tanaka T. , Hirano M. , Kawahara H. , Matsumura H. , Atsuta M. (1988). A new ion-coating surface treatment of alloys for dental adhesive resins. J Dent Res 67:1376-1380.

13.

Tanaka T. , Nagata K. , Nakabayashi N. , Masuhara E. (1979). Application of 4-META on adhesive opaque resin . J Jpn Soc Dent Appar Mater 20:221-227.

14.

Tanaka T. , Nagata K. , Takeyama M. , Nakabayashi N. , Masuhara E. (1980). Heat treatment of gold alloy to get adhesion with resin. J Jpn Soc Dent Appar Mater 21:95-102.

15.

Yamashita A. , Kondo Y. , Fujita M. (1984). Adhesive strength of adhesive resin PANAVIA EX to dental alloys. J Jpn Prosthodont Soc 28:1023-1033.

16.

Yamashita A. , Yamami T. , Ishii M. , Yamaguchi T. , Uramoto T. (1982). Procedures for applying adhesive resin (MMA-TBB) to crown and bridge restorations (Part 3). J Jpn Prosthodont Soc 26 :1118-1127.

17.

Yasuda N. ( 1978). Interface between metal and resin on the finishing line of cobalt-chromium denture (2). J Jpn Prosthodont Soc 22:525-531.