FRACTURE STRENGTH OF THE IPS EMPRESS CROWN : THE EFFECT OF OCCLUSAL DEPTH AND AXIAL INCLINATION ON LOWER FIRST MOLAR

IPS Empress 도재관의 파절강도: 하악 제1대구치에서 교합면 두께와 축면경사도에 따른 영향

  • Kim Sung-Hoon (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Lee Jin-Han (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Kim Yu-Lee (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Dong Jin-Keun (Department of Prosthodontics, College of Dentistry, Wonkwang University)
  • 김성훈 (원광대학교 치과대학 치과보철학교실) ;
  • 이진한 (원광대학교 치과대학 치과보철학교실) ;
  • 김유리 (원광대학교 치과대학 치과보철학교실) ;
  • 동진근 (원광대학교 치과대학 치과보철학교실)
  • Published : 2003.02.01

Abstract

The purpose of this study was to compare the fracture strength of the IPS Empress ceramic crown according to the occlusal depth (1.5mm, 2.0mm, 2.5mm) and axial inclination ($4^{\circ},\;8^{\circ},\;12^{\circ}$) of the lower First Molar. After 10 metal dies were made for each group, the IPS Empress ceramic crowns were fabricated and cemented with resin cement(Bistite resin cement, Tokuyama Soda Co. LTD., Japan). The cemented crowns were mounted on the testing jig with inclination of 30 degrees and the universal testing machine(Zwick Z020, Zwick, Germany)was used to measure the fracture strength. The results of this study were as follows : 1. The fracture strength of the ceramic crown with 2.5mm depth and $12^{\circ}$ inclination was the highest (1789 N). Crowns of 1.5mm depth and $4^{\circ}$ inclination had the lowest strength (1091 N). 2. There were no significant differences in the fracture strength by axial inclination of the same occlusal depth group. 3. Most fracture lines began at the loading area and extended through proximal surface perpendicular to the margin, irrespective of occlusal depth. Size of fragment was affected by the amount of occlusal reduction.

Keywords

References

  1. Southan DE, Jorgensen KD. Faulty porcelain jacket crowns. Aust Dent J 1973; 18: 152-6 https://doi.org/10.1111/j.1834-7819.1973.tb03452.x
  2. Anusavice KJ. Degradability of dental ceramics. Adv Dent Res 1992;6:82-9 https://doi.org/10.1177/08959374920060012201
  3. Chan C, Weber H. Plaque retention on teeth restored with full-ceramic crowns: A comparative study. J Prosthet Dent 1986;56:666-71 https://doi.org/10.1016/0022-3913(86)90140-X
  4. Grey NJA, Piddock V, Wilson MA. In vitro comparison of conventional crowns and a new all-ceramic system. J Dent 1993; 21:47-51 https://doi.org/10.1016/0300-5712(93)90051-Q
  5. Josephson BA, Schulman A, Dunn ZA, Hurwitz W. A compressive strength study of complete ceramic crowns, Part II. J Prosthet Dent 1991;65:388-91 https://doi.org/10.1016/0022-3913(91)90230-T
  6. Ching-Cheng L, O'Brien WJ. Strength of magnesia-core crown with different body porcelain. Int J Prosthodont 1993;6:60-4
  7. Probster L. Compressive strength of two modern all-ceramic crowns. Int J Prosthodont 1992;5:409-14
  8. Friedlander LD, Munoz CA, Goodacre CJ, Doyle MG, Moore BK. The effect of tooth preparation design on the breaking strength of Dieor crowns. Int J Prosthodont 1993;3:159-68
  9. Vita Zahnfabrik. Vita Hi-Ceram working instruction. Bad Sackingen, Germany, 1988
  10. Optec HSP laboratory technique manual. Jeneric/pentro Inc, Wallingford. Conn, January, 1988
  11. Clause H. Vita In-Ceram a new system for producing aluminum oxide crown and bridge substructures. Quintessenz Zahntech 1990;16:35-46
  12. Dicor laboratory manual, Dentsply Int., York., PA, 1987
  13. Beham G. IPS-Empress. A new ceramic technology. Ivoclar-Vivadent report 1990;6:1-13
  14. Mackert JR Jr, Russel C. Leucite crystallization of a heat-pressed dental ceramic. Int J Prosthodont 1996;9:261
  15. Kelly JR, Giordano R, Pober R, Michael J. Fracture surface analysis of dental ceramics: clinically failed restorations. Int J Prosthodont 1990;3:430-4
  16. Kern M, Doglas WH, Fechtig T, Strub JR, Delong R. Fracture strength of all-porcelain Resin bonded bridges after testing in an artificial oral environment. J Prosthet Dent 1993;21:117-21
  17. Doyle MG, Goodacre CJ, Andres CJ. The effect of tooth preparation design on the breaking strength of Dicor crown: Part 3. Int J Prosthodont 1990;3:327-31
  18. Fiedlander LD, Munoz CA, Goodacre CJ, Doyle MG, Moor BK. The effect of tooth preparation design on breaking strength of Dicor crowns: Part 1. Int J Prosthodont 1990;3:159-64
  19. Yoshinari M, Derand T. Fracture strength of all-ceramic crowns. Int J Prosthodont 1994;7:329-38
  20. Shinohara N, Minesaki Y, Mukoyoshi N, Moriyama, Jimi T. The effect of the cementing material on the strength of the all-ceramic crown. J JPN Prosthodont S 1989;33:416
  21. Eden GT, Kacic JM. Dicor crown strength improvement due to bonding. J Dent Res 1987;66:207 abstr No. 802
  22. Grossman DG, Nelson JW. The bonded Dicor crown. J Dent Res 1987;66:206 abstr No. 800
  23. Kim HS, Ju TH, Oh SC, Dong JK. A study on the fracture strength of the IPS-Empress ceramin crown according to margin type. J Korean Academy Prosthodontics 1997;35:296-307
  24. Dong JK, Oh SH, Kim SD. Fracture strength of the IPS Empress crown : The effect of occlusal depth and axial inclinationon upper first premolar crowns. J Korean Academy Prosthodontics 1999;37:127-33
  25. Choi TR, Lee HH, Dong JK. Fracture Strength of the IPS Empress Crown : The effect of occlusal depth and axial inclination on upper first molar. J Korean Academy Prosthodontics 2001;39:171-683
  26. Song BK, Lee HH, Dong JK. Fracture Strength of the IPS Empress Crown : The effect of occlusal depth and axial inclination on upper central incisor. J Korean Academy Stomatognathic Function and occlusion 2000;16:237-44
  27. Land CH. A new system of restoring badly decayed teeth by means of an enamelled metallic coating. Independent Practitoner 1886;7:407-8
  28. Wohlwend A, Scharer P. The Empress technique. Quintessenz Zahntech 1990;16:966-78
  29. Probster L. Compressive strength of two modern all-ceramic crowns. Int J Prosthodont 1992;5:409-14
  30. Luthy H, Dong JK, Wohlwend A, Scharer P. Effects of veneering and glazing on the strength of heat-pressed ceramics. Schweiz Monatsschr Zahnmed 1993;103:1257-60
  31. Hsinenberg BJ. IPS-Empress mit neuer keramik technologie. Quintessenz Zahntech 1991;17:475-9
  32. Dong JK, Luthy H, Wohlwend A, Scharer P. Heat-pressed ceramics : Technology and strength. Int J Prosthodont 1992;5:9-16
  33. IPS-Empress manual. Ivoclar Com., Schann, Liechtenstein
  34. Richards MW, Kelly JR. Indentation-strength of unpressed and pressed Empress disk, Abstract. J Dent Res 1994;74:159
  35. Mackert JR, Russel CM. Leucite crystallization during Empress proessing, Abstract. J Dent Res 1995;74:166
  36. Uctasli S, Wilson HJ, Unterbrunk G, Zaimoglu A. The strength of a heat-pressed all-ceramic restorative material. J Oral Rehabilitation 1996;23:257-61 https://doi.org/10.1111/j.1365-2842.1996.tb00850.x
  37. Mackert JR, Russell CM. Leucite crystallitation during processing of a heat-pressed dental ceramic. Int J Prosthodont 1996;9: 261-5
  38. Krejci I, Krejci D, Lutz F. Clinical evaluation of a new pressed glass ceramic inlay material over 1.5 years. Quintessense int 1992;23:181-6
  39. Sorensen JA, Fanuscu MI, Choi C, Mifo W. Status of clinical trial on Empress crown. J Dent Res 1995;74:159-62
  40. Tidehag P, Gunne J. A 2-year clinical follow-up study of IPS-Empress ceramic inlay. Int J Prosthodont 1995;8:456-60
  41. 오상천, 최대균, 우이형, 최부병. 주입선에 따른 IPS Empress도재의 굽힘강도와 미세구조에 관한 연구. 경희치대논문집 1997;19:391-418
  42. Mutobe Y, Maruyama T, Kataoka S. In harmony with nature. Esthetic restoration of a nonvital tooth with IPS-Empress all-ceramic material. QDT 1977;83-5
  43. Seghi RR, Sorensen JA. Relative flexural stength of six new ceramic materials. Int J Prosthodont 1995;8:239-46
  44. 김병훈 외 9명. 세라믹스 총론. 반도출판사 1987
  45. 이준근. 세라믹의 기계적 특성. 반도출판사 1994
  46. 김경남 외 6명. 치과재료학. 군자출판사 1995
  47. Green DJ. Microcracking mechanisms in ceramics. In. Bradt RC, Evans AG, Lange FF, Hasselman DP(eds). Fracture Mechanics of ceramics. Vol.5. New York. plenum press. 1983;457-78
  48. Green DJ, Hannink RHJ, Swain MV. Transformation toughening of ceramics. Boca Raton FL. CRC Press. 1989;57-91
  49. Anusavice KJ, Hojjatie B. Tensile stress in glassceramic crowns: Effect of flaws and cement voids. Int J Prosthodont 1992;5:351-4
  50. Kelly JR, Giordana R, Prober R, Gima MJ. Fracture surface analysis of dental ceramics: Clinically failed restorations. Int J Prosthodont 1990;3:430-4
  51. Dicor laboratory manual. Densply international, York., Pa, 1987
  52. Hobo S, Iwata T. Castable apatite ceramics as a new biocompatible restorative material. 1. Teoretical considerations. Quintessence Int 1985;16:135-41
  53. Sozio RB, Riley EJ. Shrink free ceramic. Dent Clin North Am 1985;29:705-17
  54. Rodrigues A, Nathanson D, Goldstein R. Fracture resistance of different porcelain crowns system in vitro. Abstract No.1311. J Dent Res (special issue)1987;66:270
  55. Craig RG. Restorative dental materials, pp65, St Louis, CV Mosby,1989
  56. Okeson JP. Management of Temporomandibular Disorders and Occlusion. MosbyYear Book 1993;69
  57. McInnes-Ledoux PM, Ledoux WR, Weinberg R, Pappold A. Luting castable ceramic restorations-a bond strength study 'Abstract'. J Dent Res1987;66:245
  58. Doering J, Jensen ME, Sheth J, Tolliver D, Chan D. Fracture resistance of resinbonded etched-porcelain full veneer crowns 'Abstract'. J Dent Res 1987;66:207
  59. Grossman DG, Nelson JW. The bonded Dicor crown. J Dent Res 1987;66:206, bstr No. 800
  60. Anusavice KJ, Hojjatie B. Tensile stress in glassceramic crowns: Effect of flaws and cement voids. Int J Prosthodont 1992;5:351-4
  61. Kelly JR. Clinically relevant approach to failure testing of all-ceramic restorations. J Prothet Dent 1999;81(6):652-61 https://doi.org/10.1016/S0022-3913(99)70103-4