주조기와 매몰재의 성분변화에 따른 티타늄의 주조성에 관한 연구

THE EFFECT OF CASTING MACHINE AND INVESTMENT ON THE CASTABILITY OF TITANIUM ALLOY

  • 정다운 (전남대학교 치과대학 보철학교실) ;
  • 양홍서 (전남대학교 치과대학 보철학교실)
  • Chung, Da-Woon (Department of Dentistry Graduate School, Chonnam National University) ;
  • Yang, Hong-So (Department of Dentistry Graduate School, Chonnam National University)
  • 발행 : 2006.10.31

초록

Statement of problem: There has been a eat interest in the use of titanium for fixed and removable prostheses in recent because of its excellent biocompatibility. However, the melting temperature and chemical reactivity of titanium necessities casting system different from those used in conventional casting. The current titanium casting systems are based on an electric-arc design for melting the metal in an argon atmosphere and its exclusive investment. Despite the new development in Ti casting system, inadequate mold filling and internal porosity are frequently observed casting defects. Purpose : The purposes of this study were to compare the castibility and reaction layer of the casting titanium under the two casting machines and their investment condition. Material and method: coping and machine-milled titanium coping according to the casting methods and the marginal configurations. The total 28 specimens were used, and these are divided into 4 groups according to 2 casting machines and 2 investments. The castings were analyzed using x-ray microanalysis and microhardness testing. The reaction layer between margin of titanium casting and the investments was observed and analyzed with scanning electron microscope. Result: 1. Castabiliy of casting titanium specimen was best in the group of centrifugal casting machine and Selevest $CB^{\circledR}$ and good that of Selevest CB and pressure differential casting machine, Rematitan plus and centrifugal casting machine, Rematitan plus and pressure differential casting machine in order. 2. There was no significanct correlation in titanium castability in respect of casting machine. However ANOVA indicated that Selevest $CB^{\circledR}$ groups had significantly better castability than Rematitan $plus^{\circledR}$ groups.(p<0.05) 3. There was a significant microhardness difference between centrifugal casting machine groups and pressure differential groups.(p<0.05) Titanium castings in centifugal groups had significantly harder than those in pressure differential groups. 4. The addition of zirconia decreased interfacial reactivity. Conclusion: above result revealed that of the castability of titanium casting specimens had little correlation in casting machines and was better in magnesia-based investment contained ZrO2 groups. However in order to practice casting titanium in clininic, its castability should be improved, also there should be more research on factor of castability so that long-span prothesis and removable partial denture metla frame may be casted completly.

키워드

참고문헌

  1. Wang RR, Boyle AM. A simple method for inspection of porosity in titanium castings. J prosthet Dent 1993:70:275-6 https://doi.org/10.1016/0022-3913(93)90065-V
  2. Parr GR, Gardner LK, Toth RW. Titanium : the mystery metal of implant dentistry Dental materials aspects. J Prosthet Dent 1985:54:410-14 https://doi.org/10.1016/0022-3913(85)90562-1
  3. Eugene PL, Peter M. Titanium and titanium alloys as dental materials. Int Dent J 1993:43:245-53
  4. Reclaru L, Meyer JM. Study of corrosion between a titanium implant and dental alloy. J Dent 1994:22:159-68 https://doi.org/10.1016/0300-5712(94)90200-3
  5. Miyazaki T. Recent progress in titanium dental casting technologies and current problems for a clinical application. Quintessence 1992:11:171-182
  6. Miyazaki T. Casting of titanium and its alloys: Metal surface and ceramics Proceeding of international Symposiumon titanium in dentistry 1995:3:120-133
  7. Christer Bessing, Maud Bergman. The castability of unalloyed titanium in three different casting machines. Swed Dent J 1992: 16: 109-113
  8. Watanabe, Okawa, Miyakawa, Nakano. Determination of titanium flow by the tracer element molten methodin the dental precisopn casting. 1. The principle of flow visualization and application to sample castings. J J Dent Mater 1990:9:623-632
  9. Watanabe, Okawa, Miyakawa, Nakano. Determination of titanium flow by the tracer element molten methodin the dental precisopn casting. 2. Relationship between the titanium flow in plate molds and the casting defects. J J Dent Mater 1991:10:77-96
  10. Watanabe K, Okawa S, Miyakawa O, Nakano S, Honma H, Shiokawa N, Kobayashi M. Relationship between titanium flow and casting contamination caused by mold materials. J Dent Mater 1992:11:662-671
  11. Mori T, Togaya T, Yabugami M, Jean-Louis M. Titanium for removable dentures. J Oral Rehabilit 1997:24:338-341 https://doi.org/10.1046/j.1365-2842.1997.d01-301.x
  12. Watari F. High temperature reactivity between titanium and refractory oxides in dental casting procedure. Fundamental study on refractoriness of investments and ceramo metal bonding by analytical SEM and oxide single crystals. J Dent Mater 1989:8:83-96
  13. MiyazakiT(l995). Casting of titanium : mold materials Procedings: Transaction of second international congress on dental materilas. 107-11237
  14. Mori T. Titanium: A review of investments for high temperature castiing. Aust prosthodont J 1993:7:31-49
  15. Miyazaki T. Recent advances in inverstment materials for titanium castings. Transactions of second internationl congress on dental metarials. 1993:107-112
  16. Watanabe I, Watkins JH, Nakagima H, Atsuta M, Okabe T. Effect of pressure difference on the quality of titanium casting. J Dent Res 1997:3:773-9
  17. Her H, Syverud M, Waarli M. Mold filling and porosity in casting of titanium. J Dent Res 1993:9:15-8
  18. Syverud M, Her H. Mold filling of Ti castings using investments with different gas permeability. Dent Mater 1995:11:14-8 https://doi.org/10.1016/0109-5641(95)80003-4
  19. Sunnerkrantz PA, Syverud M, Her H. Effect of casting atmosphere on the quality of Ti-crowns. Scand J Dent Res 1990:98:268-72
  20. Her H, Syverud M, Waari M, Jorgensen RB. Casting of dental titanium crowns: surface reations and dimensional fit. In: Proceedings of the 1990 International Conference on titanium. Products and Applications. Vol. II . Dayton. Ohio: Titanium Development Association: 1990. p.612-21
  21. Mori T, Jean-Louis M, Yabugami M, Togaya T. The effect of investment type on the fit of cast titanium crowns. Aust Dent J 1994:39:384-52
  22. Chai TI, Stein RS. Porosity and accuracy of multiple-unit titanium castings. J Prosthet Dent 1995:73:534-41 https://doi.org/10.1016/S0022-3913(05)80112-X
  23. Chan D, Guillory V, Blackman R, Chung KH. The effects of sprue designs on the roughness and porosity of porosity of titanium castings. J Prosthet Dent 1997: 78:400-4 https://doi.org/10.1016/S0022-3913(97)70048-9
  24. Al-Mesmar HS, Morgano SM, Mark LE. Investigation of the effect of three sprue designs on the porosity and the completeness of titanium cast removable partial denture frameworks. J Prosthet Dent 1999:82:15-21 https://doi.org/10.1016/S0022-3913(99)70126-5
  25. D.C.N. Chan R. Blackman. D.A. Kaiser, K. Chung. The effect of sprue design on the marginal accuracy of titanium castings. J Oral Rehabili 1998:25:424-9 https://doi.org/10.1046/j.1365-2842.1998.00268.x
  26. Kim KN. Dental casting alloy, fisrt edition. Kunia, 45-60
  27. Blackman R, Barghi N, Tran. Dimensional changes in casting titanium removable partial denture frameworks. J Prosthet Dent 1991:65:309-315 https://doi.org/10.1016/0022-3913(91)90181-U
  28. Bridgeman JT, Marker VA, Hummel SK. Comparison of titanium and cobalt-chromium removable partial dentures. J Am Dent Assoc 1997:78:187-193
  29. Russell RW, Gerhard EW, Mario CC. Interfacial reactions of cast titanium with mold materials. Int J Prosthet 1998:11:33-43
  30. Waterstratt, RM. Comments on castings of Ti-13Cu-4. 5Ni alloy. Publication No.(NIH) 77-127, DHEW:224-33
  31. Watanabe K,Okawa S, Miyakawa O, Nakano S, Shiokawa N, Kobayashi M. Molten Titanium flow in a mesh cavity by the flow visualization technique. Dent Mater J 1991:10:128-37 https://doi.org/10.4012/dmj.10.128
  32. Eugene PL, Peter M. Titanium and titanium alloys as dental materials. Int Dent J 1993:43:245-53
  33. Matsui A(1989). Casting pure titanium and high fusing dental alloys by experimental castings machine. 6. Castability of pure titanium castings with room temperature molds. Nihon Shika Hozongaku Zasshi 32, 1989:1021-1028
  34. Hashimoto H. Kuroiwa a. Wada K. Hibino Y. Akaiwa Y. Reaction product on the surface titanium casting. Nihon Shika Hozongaku Zasshi 11 1992:603-614
  35. Oda Y et al. Surface reaction between titanium casting and investments. Bull Tokyo Dent Coll 1996:37:129-136
  36. Watari F, Nishimura F, Fukumoto R, Nomito S. Zirconia investment Nihon Shika Hozongaku Zasshi6, 1987:212-217
  37. Hagg G. General and inorganic chemistry. Stockholm: Almquist & Wicksell. 1965:685
  38. Miyazaki T. Recent advances in investment materials for titanium castings. International Congress on Dental Material 1993:107-116
  39. Mori T, Jean Louis M, Toyaga T. The effect of investment type on the fit of cast titanium crowns. Aust Dent J 1994:39:348-352 https://doi.org/10.1111/j.1834-7819.1994.tb03104.x
  40. Watanabe I, Watkins JH, Nakajima H, Atsuta M, Okabe T. Effect of pressure difference on the quality of titanium casting. J Dent Res 1997:76:773-779 https://doi.org/10.1177/00220345970760031001
  41. Greener EH, Moser JB, Opp J, Szurgot K, Marker BC. Properties of dental castability of Ti-6Al-4V. J Dent Res 1986:65:301
  42. Watanabe, Okawa, Miyakawa, Nakano. Molten titanium flow in a mesh cavity by the flow visualization technique. Dent Mater 1991:10(2):128-137 https://doi.org/10.1016/0109-5641(94)90053-1
  43. Baez RJ, Nonaka T. Titanium castability and surface characteristics with three phosphate bonded investments. J Dent Res 1991:70:1757