The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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FLEXURE STRENGTH AND COLOR CHANGE OF REUSED IPS EMPRESS 2

반복 사용된 IPS Empress 2의 굽힘강도와 색변화에 관한 연구

  • Song Young-Kuk (Department of Prosthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University) ;
  • Kim Yu-Lee (Department of Prosthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University) ;
  • Kim Sung-Hoon (Department of Prosthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University) ;
  • Ahn Hee-Young (Department of Prosthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University) ;
  • Jin Tai-Ho (Department of Prosthodontics, School of Dentistry, Wonkwang Dental Research Institute, Wonkwang University)
  • 송영국 (원광대학교 치과대학 치과보철학교실 및 원광치의학연구소) ;
  • 김유리 (원광대학교 치과대학 치과보철학교실 및 원광치의학연구소) ;
  • 김성훈 (원광대학교 치과대학 치과보철학교실 및 원광치의학연구소) ;
  • 안희영 (원광대학교 치과대학 치과보철학교실 및 원광치의학연구소) ;
  • 진태호 (원광대학교 치과대학 치과보철학교실 및 원광치의학연구소)
  • Published : 2003.02.01
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Abstract

Development of new ceramic and esthetic need of patient increased the use of ceramic restorations. The purpose of this study was to confirm the possibility of recycling for IPS Empress2 which has a lot of advantages in esthetics. 1st, 2nd and 3rd pressed disc-shaped($10{\times}1.5mm$) IPS Empress 2 specimens were made with IPS Empress ingot(shade 200, Ivoclar, Liechtenstein) and pressing furnace(IPS Empress EP 500, Ivoclar, Liechtenstein). Flexure strength was measured with universal testing machine(Zwick 145641, Zwick, Germany), and color change and staining resistance of specimens were evaluated with colorimeter (Model TC-6FX, Tokyo Denshoku Co., Japan). The followings were drawn from this study : 1. Flexure strength of the 1st, the 2nd, and the 3rd pressed specimens showed 236.78 MPa. 247.16MPa, and 220.72MPa, respectively. Flexure strength of the 2nd pressed specimens was higher than others, but there's no statistical difference between them. 2. The color difference between the 1st and the 2nd pressed specimens was 3.25, and that between the 1st and the 3rd pressed specimens was 3.63(P<0.05). 3. The color change after staining of the 1st, the 2nd. and the 3rd pressed specimens were 1.43, 2.64, and 1.45, respectively. In this study, reused IPS Empress 2 specimens showed insignificant change of flexure strength and stain resistance, but they showed some color change according to reuse. From this results, the limited possibility of reuse for IPS Empress 2 could be considered.

Keywords

References

  1. Westman JF. Recycling amalgam and keeping in sample. Northwest Dent 1997;76:19-24
  2. Reisbick MH, Brantley WA. Mechanical property and microstructural variations for recast low-gold alloy. Int J Prosthodont 1995;8:34-50
  3. Henriques GE, Consani S, Rollo JM, Andrade E, Silva F. Soldering and remelting influence on fatigue strength cobalt-chromium alloys. J Prosthet Dent 1997;78:146-52 https://doi.org/10.1016/S0022-3913(97)70118-5
  4. Jochen DG, Caputo AA, Matyas J. Reuse of silver-palladium ceramic metal. J Prosthet Dent 1991;65:588-91 https://doi.org/10.1016/0022-3913(91)90304-F
  5. Hesby DA, Kobes P, Garver DG, Pelleu GB. Physical properties of a repeatedly used nonprecious metal alloy. J Prosthet Dent 1980;44:291-3 https://doi.org/10.1016/0022-3913(80)90014-1
  6. Kim TK, Lee SH, Yang JH, Chong HY. An experimental study on the bond strength at the interface between porcelain and suecessively recast palladium-silver ceramic alloy. J Korean Acad Prosthodont 1989;27:31-47
  7. Jung KT, Yang JH, Lee SH, Jung HY. An experimental study on the bond strength of adhesive resins to successively recast alloys for resin-bonded restorations. J Korean Acad Prosthodont 1990;28:5366
  8. Kim I, Yang HS. A study on the bond strength between reused dental alloys and porcelain. J Korean Acad Prosthodont 1993;31:181-190
  9. Becham G. IPS-Empress. A new ceramic technology. Ivoclar-Viavadent report 1991;100 :404-408
  10. Machert JR, Russel CM. Leucite crystallization during processing of a heat-pressed dental ceramic. Int J Prosthodont 1996;9:261-265
  11. Song BK, Park HB, Oh SC, Jin TH. A study on the pressing accuracy of the reused IPS-Empress ingot. J Korean Acad Prosthodont 1997;35:357-364
  12. Jin TH, Park HB. Physical properties of the reused IPS Empress ceramic. Part I. Color stability. J Wonkwang Institute Dent Res 1997;7:133-138
  13. Jin TH, Song YK. Physical properties of the reused IPS Empress ceramic. Part III. Study on the stain resistance. J Korean Acad Prosthodont 1999;37:776-780
  14. Jin TH, Kim HJ. Physical properties of the reused IPS Empress ceramic. Part II. Study on the flexure strength. J Korean Acad Prosthodont 1998;36:524-529
  15. Kim SD, Oh SC. A study on the wear and microstructure of reused IPS Empress ceramic. J Wonkwang Institute Dent Res 1998;8:21-36
  16. Park EE, Oh SC. Biaxial flexure strength of reused IPS Empress Cosmo ceramic. J Wonkwang Institute Dent Res 2000;10:83-90
  17. Schweiger M, Holand W, Frank M et al. IPS Empress 2. A new pressable high-strength glass-ceramic for esthetic all ceramic restoration. Quintessence Dent Tech 1999;22:143-151
  18. Hwang JW, Yang JH. A Study on the fracture strength of conventional and copy milled In-Ceram crowns. J Korean Acad prosthodont 1997;35(2):417-429
  19. Southan DE, Jorgensen KD. Faulty porcelain jacket crowns. Aust Dent J 1973;18:152-156 https://doi.org/10.1111/j.1834-7819.1973.tb03452.x
  20. Oh SC, Dong JK. A study on the flexural strength of heat-pressed ceramics according to sprue designs. J Korean Acad Prosthodont 1997;35:130-143
  21. IPS-Empress working procedures, Ivoclar AG, Schaan, Liechtenstein 1991
  22. Dong JK, Luthy H, Wohlwend A, Scharer P. Heat-pressed ceramics. Technology and strength. Int J Prosthodont 1992;5:9
  23. Krejci I, Krejci D, Lutz F. Clinical evaluation of a new pressed glass ceramic inlay material over 1.5 years. Quintessense int 1992;23:181-186
  24. Sorensen JA, Fanuscu MI. Choi C, Mifo W. Status of clinical trial on Empress crown. J Dent Res 1995;74:159
  25. Tidehag P, Gunne J. A 2-year clinical follow-up study of IPS Empress ceramic inlay. Int J Prosthodont 1995;8:456-460
  26. Proster L. Compressive strength of two modern all-ceramic crowns. Int J Prosthet 1992;4:409-414
  27. IPS Empress 2 working procedures, IvocIar AG, Schaan, Liechtenstein 1998
  28. McLean JW. The science and art of dental ceramics. Volume 1 The nature of dental ceramics and their clinical use. Quintessence Publishing Co 1979
  29. Cattell MJ, Knowles JC, Clarke RL, Lynch E. The biaxial flexural strength of two pressable ceramic system. J Dent 1999;27:183-196 https://doi.org/10.1016/S0300-5712(98)00047-5
  30. Marshall DB. All improved biaxial flexure test for ceramics. Am Ceram Soc Bull 1980;59:551-553
  31. Shetty DK, Rosenfield AR, Duckworth WH, Held PR. A biaxial flexure test for evaluating ceramic strength. J Am Ceram Soc 1983;66:36-42 https://doi.org/10.1111/j.1151-2916.1983.tb09964.x
  32. Lamon J. Statistical approaches to failure for ceramic reliability assessment. J Am Ceram Soc 1988;71:106-112 https://doi.org/10.1111/j.1151-2916.1988.tb05825.x
  33. Eagan RJ, Swearengen JC. Effect of composition on the mechanical properties of aluminosilicate and borosilicate glasses. J Am Ceram Soc 1978;61:28
  34. Jones DW. The strength and strengthening mechanisms of dental ceramics. Quintessence Publishing Co 1983;83-141
  35. Myers ML, Ergle JW, Fairhurst CW, Ringle RD. Fatigue failure parameters of IPS Empress porcelain. lnt J Prosthodont 1994;7:549-553
  36. Cattell MJ, Clarke RL, Lynch EJ. The transverse strength, reliability and microstructural features of four dental ceramics. Part I. J Dent 1997;25:399-407 https://doi.org/10.1016/S0300-5712(96)00058-9
  37. Kelly JR, Giordano R, Pober R, Cima MJ. Fracture surface analysis of dental ceramics. lnt J Prosthodont 1990;3:430-440
  38. Seghi RR, Sorensen JA. Relative flexural strength of six new ceramic materials. lnt J Prosthodont 1995;8:239-246
  39. Kappert HF. Examination report to lvoclar AG, Schaan, Liechtenstein 1998
  40. Sorensen JA, Cruz M, Mito WT. Research evaluations of a lithium disilicate restorative system. IPS Empress 2. Signature 1999;4:4-10
  41. Jin TH. A study on the color stability and bond strength of denture base repair resins. J Korean Acad Prosthodont 1995;33:24-31
  42. Seghi RR, Hewlett ER, Kim J. Visual and instrumental colorimetric assessments of small color difference on translucent dental porcelains. J Dent Res 1989;68: 1760-1764 https://doi.org/10.1177/00220345890680120801
  43. Seghi RR. Effects of instrument-measuring geometry on colorimetric assessments of dental porcelains. J Dent Res 1990;69:1180-1183 https://doi.org/10.1177/00220345900690051101
  44. Esquivel JF, Chai J, Wozniak WT. Color stability of low-fusing porcelains for titanium. lnt J Prosthodont 1995;8:479-485
  45. Goldstein GR. Schmitt GW. Repeattability of a specially designed introral colorimeter. J Prosthet Dent 1993;69:616-619 https://doi.org/10.1016/0022-3913(93)90292-V
  46. O'Brien WJ, Groh CL, Boenke KM. A new small color difference equation for dental shades. J Dent Res 1990;69:1762-1764 https://doi.org/10.1177/00220345900690111001
  47. Esquivel JF, Chai J, Woznik WT. Color stability of low-fusing porcelain for titanium. lnt J Prosthodont 1995;8:479-485