대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)

  • 제43권3호
  • /
  • Pages.293-305
  • /
  • 2005
  • /
  • 0301-2875(pISSN)
  • /
  • 2005-3789(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
권호 표지

THE EFFECT OF SURFACE FINISHES ON FLEXURAL STRENGTH, FRACTURE TOUGHNESS OF FELDSPATHIC DENTAL PORCELAIN

  • Chang, Il-Sung (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Lee, Sun-Hyung (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Yang, Jae-Ho (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Han, Jung-Suk (Department of Prosthodontics, Graduate School, Seoul National University) ;
  • Lee, Jai-Bong (Department of Prosthodontics, Graduate School, Seoul National University)
  • 발행 : 2005.06.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Statement of problems. Conventional feldspathic porcelain is used extensively as a restorative material and it is subjected to grinding and polishing during fabrication and delivery procedures. There is still considerable controversy concerning the best methods to achieve the strongest porcelain restorations after such adjustments. Purpose. The objective of this study was to investigate the effects of (1) overglazing, (2) selfglazing, and (3) fine polishing on the flexural strength and fracture toughness of feldspathic dental porcelain. Material and method. Ninety porcelain disks were prepared for flexural strength test and sixty porcelain disks were fabricated for fracture toughness test. Specimens were divided into three groups for each test as follows: 1) overglazed 2) self-glazed 3) polished. The flexural strength of feldspathic porcelains was determined by ring-on-ring biaxial flexural strength test. The fracture toughness values of three experimental groups were obtained by indentation fracture toughness test. Results. The flexural strength of overglazed group was significantly higher than that of selfglazed and polished group (P<0.05), while the difference between self-glazed and polished group was not significant (P>0.05). The fracture toughness values of overglazed and polished group were significantly higher than that of self-glazed group (P<0.05), while the difference between overglazed and polished group was not significant (P>0.05). Conclusions. This results supported the use of polishing as an alternative to glazing metal ceramic restorations, as it was not detrimental in flexural strength and fracture toughness. But, under the conditions of this study, overglazing was the ideal surface finishing method of feldspathic dental porcelain.

키워드

참고문헌

  1. McLean JW, Hughes TH. The reinforcement of dental porcelain with ceramic oxides. Br Dent J 1965;119:251-5
  2. Sozio RB, Riley EJ. The shrink-free ceramic crown. J Prosthet Dent 1983;49:182-7 https://doi.org/10.1016/0022-3913(83)90497-3
  3. Adair PJ, Grossman DG. The castable ceramic crown. Int J Periodontics Restorative Dent 1984;4:3246
  4. O' Brien WJ. Magnesia ceramic jacket crowns. Dent Clin North Am 1985;29:719-23
  5. Katz S[inventor]. High strength feldspathic dental porcelain containing crystalline leucite. US Patent No.4,798,536. 17 Jan 1989.
  6. Sadoun M. All-ceramic bridges with the slip casting technique. Presented at the 7th International Symposium on Ceramic, Paris, September 1988
  7. Dong JK, Luthy H, Wohlwend A, Scharer P. Heatpressed ceramics: Technology and strength. Int J Prosthodont 1992;5:9-16
  8. Andersson M, Oden A. A newall-ceramic crown. A dense-sintered, high-purity alumina coping with porcelain. Acta Odontol Scand 1993;51:59-64 https://doi.org/10.3109/00016359309041149
  9. Craig RG. Restorative Dental Materials, ed 10. St Louis: Mosby, 1997:485-99
  10. Giordano R Cima M, Pober R. Effect of surface finish on the flexural strength of feldspathic and aluminous dental ceramics. Int J Prosthodont 1995;8:311-9
  11. McLean JW. High strength ceramics. Quintessence Int 1987;18(2):97-106
  12. Giordano R, Campbell S, Pober R. Flexural strength of feldspathic porcelain treated with ion exchange, overglaze, and polishing. J Prosthet Dent 1994;71:46872
  13. McLean JW. The science and art of dental ceramics. Vol 1: The nature of dental ceramics and their clinical use. Quintessence Publishing Co, 1979;39
  14. Marshall DB, Evans EG, Khuri-Yakub BT, Tien TW, Kino GS. The nature of machining damage on brittle materials. Proc R Soc Lond [Series A] 1993;385:461-75.
  15. Fuzzi M, Zaccheroni Z, Vallania G. Scanning electron microscopy and profilometer evalua tion of glazed and polished dental porcelain. Int J Prosthodont 1996;9:452-8
  16. Quirynen M, Bollen CML. The influence of surface roughness and surface-free energy on supra- and subgingival plaque formation in man. A review of the literature. J Clin PeriodontoI 1995;22:1-14
  17. Quirynen M, Marechal M, Busscher HJ, Weerkamp AH, Darius PL, van Steenberghe D. The influence of surface free energy and surface roughness on early plaque formation. J Clin Periodontol 1990;17:138-44 https://doi.org/10.1111/j.1600-051X.1990.tb01077.x
  18. Monasky GE, Taylor DF. Studies on the wear of porcelain, enamel and gold. J Prosthet Dent 1971;25:299-306 https://doi.org/10.1016/0022-3913(71)90191-0
  19. McLean JW, Hughes TH. The reinforcement of dental porcelain with ceramic oxides. Br Dent J 1965;119:251-67
  20. Levy H. Effects of laboratory finishing techniques on the mechanical properties of dental ceramics. Int Dent 1987;69:1039-45
  21. Brackett S, Leary J, Turner K. An evaluation of porcelain strength and the effect of surface treatment. J Prosthet Dent 1989;61:446-51 https://doi.org/10.1016/0022-3913(89)90012-7
  22. Rosenstiel SF, Baiker MA, Johnston WM. A comparison of glazed and polished dental porcelain. Int J Prosthodont 1989;2:524-9
  23. Fairhurst CW,. Lockwood PE, Ringle RD, Thompson WO. The effect of glaze on porcelain strength. Dent Mater 1992;8:203-7 https://doi.org/10.1016/0109-5641(92)90084-P
  24. Griggs JA, Thompson JY, Anusavice KJ. Effects of flaw size and auto-glaze treatment on porcelain strength. J Dent Res 1996;75(6):1414-7 https://doi.org/10.1177/00220345960750061301
  25. Williamson RT, Kovarik RE, Mitchell RJ. Effects of grinding, polishing and overglazing on the flexure strength of a high-Ieucite feldspathic porcelain. Int J Prosthodont 1996;9:30-7
  26. Ban S, Anusavice KJ. Influence of test method on failure stress of brittle dental materials. J Dent Res 1990;69:1791-9 https://doi.org/10.1177/00220345900690120201
  27. Wachtman JB, Capps W, Mandel J. Biaxial flexure tests of ceramic substrates. J Mater 1972;7:188-94
  28. Kirstein AF, Peil WH, Woolley RM, Davis LJ. Deflection of centrally loaded thin circular elastic plates on equally spaced point supports. J Res Natl Bur Stds 1966;70(C):227-44
  29. Shetty DK, Rosenfield AR, McGuire P, Bansal GK, Duckworth WH. Biaxial flexure tests for ceramics. Am Ceram Soc Bull 1980;59:1193-7
  30. Rosenstiel SF, Porter SS. Apparent fracture toughness of dental porcelain with a metal substructure. Dent Mater 1988;4:187-90 https://doi.org/10.1016/S0109-5641(88)80062-9
  31. Taira M, Nomura Y, Wakasa K, Yamaki M, Matsui A. Studies on fracture toughness of dental ceramics. J of Oral Rehab 1990;17:551-63 https://doi.org/10.1111/j.1365-2842.1990.tb01426.x
  32. Anstis GR, Chantikul P, Lawn BR, Marshall DB. A critical evaluation of indentation techniques for measuring fracture toughness: I . Direct crack measurements. J Am Ceram Soc 1981;64:533-8 https://doi.org/10.1111/j.1151-2916.1981.tb10320.x
  33. Al-Hiyasat AS, Saunders WP, Sharkey SW, Smith G, Gilmour WH. The abrasive effect of glazed, unglazed, and polished porcelain on the wear of human enamel, and the influence of carbonated soft drinks on the rate of wear. Int J Prosthodont 1997;10:269-82
  34. Clayton JA, Green E. Roughness of pontic materials and dental plaque. J Prosthet Dent 1970;23:407-11 https://doi.org/10.1016/0022-3913(70)90007-7
  35. Brewer JD, Garlapo DA, Chipps EA, Tedesco LA. Clinical discrimination between autoglazed and polished porcelain surfaces. J Prosthet Dent 1990; 64:631-5 https://doi.org/10.1016/0022-3913(90)90284-J
  36. Barghi N, King CJ, Draughn RA. A study of porcelain surfaces as utilized in fixed prosthodontics. J Prosthet Dent 1975;34:314-9 https://doi.org/10.1016/0022-3913(75)90109-2
  37. Marshall DB. An improved biaxial flexure test for ceramics. Ceram Bull 1980;59:551-3
  38. Wilshaw TR. Measurement of tensile strength of ceramics. J Am Ceram Soc 1968;51(2):111 https://doi.org/10.1111/j.1151-2916.1968.tb11849.x
  39. Darvell B. Review: Uniaxial compressive tests and the validity of indirect tensile strength. J Mater Sci 1990;25:757-80 https://doi.org/10.1007/BF03372161
  40. Seghi RR, Daher T, Caputo A. Relative flexural strength of dental restorative ceramics. Dent Mater 1990;6:181-4 https://doi.org/10.1016/0109-5641(90)90026-B
  41. Seghi RR, Sorensen JA. Relative flexural strength of six new ceramic materials. Int J Prosthodont 1995;8:239-46
  42. Kazuyuki H, Tomozawa M. Dynamic fatigue of treated high-silica glass: explanation by crack tip blunting. J Am Ceram Soc 1987;70:377-82 https://doi.org/10.1111/j.1151-2916.1987.tb05654.x
  43. Jones DW. The strength and strengthening mechanisms of dental ceramics. In: McLean JW(ed). Dental Ceramics-Proceedings of the First International Symposium on Ceramics. Chicago: Quintessence 1983:83-141
  44. Sherrill CA, O' Brien WJ. Transverse strength of aluminous and feldspathic porcelain. J Dent Res 1974;53:683-90 https://doi.org/10.1177/00220345740530032801
  45. Chu FCS, Frankel N, Smales RJ. Surface roughness and flexural strength of self-glazed, polished, and reglazed In-Ceram/Vitadur Alpha porcelain laminates. Int J Prosthodont 2000;13:66-71
  46. Davidge RW, Green TJ. The strength of two-phase ceramic/glass materials. J Mater Sci 1968;3:629-34 https://doi.org/10.1007/BF00757910
  47. Kelly JR. Perspectives on strength. Dent Mater 1995;11:103-10 https://doi.org/10.1016/0109-5641(95)80043-3
  48. Mecholsky JJ Jr. Fracture mechanics principles. Dent Mater 1995;11:111-2 https://doi.org/10.1016/0109-5641(95)80044-1
  49. Frechette VD. Failure Analysis of Brittle Materials. Advances in Ceramics. 1990 Vol.28 Westerville, OH: The American Ceramic Society
  50. Quinn GD, Morrell R. Design data for engineering ceramics: A review of the flexural test. J Am Ceram Soc 1991;74:2037-66 https://doi.org/10.1111/j.1151-2916.1991.tb08259.x
  51. Wiederhorn SM. Fracture surface energy of glass. J Am Ceram Soc 1969;52:99-105 https://doi.org/10.1111/j.1151-2916.1969.tb13350.x
  52. Morena R, Lockwood PE, Fairhurst CW. Fracture toughness of commercial dental porcelains. Dent Mater 1986;2:58-62 https://doi.org/10.1016/S0109-5641(86)80052-5
  53. Freiman SW. Fracture mechanics applied to brittle materials ASTM STP678. Philadelphia: ASTM Publishing, 1978
  54. Parmqvist S. Occurrence of crack formation during Vickers indentation as a measure of the toughness of hard metals. Arch Eisenhuttenwes 1962;33:629-33
  55. Anusavice KJ, Lee RB. Effect of firing temperature and water exposure on crack propagation in unglazed porcelain. J Dent Res 1989;68:1075-81 https://doi.org/10.1177/00220345890680060401
  56. Gupta PK, Jubb NJ. Post indentation slow growth of radial cracks in glasses. J Am Ceram Soc 1981;64:C112-C114
  57. Fairhurst CW, Anusavice KJ, Hashinger DT, Ringle RD, Twiggs SW. Thermal expansion of dental alloys and porcelains. J Biomed Mater Res 1980;14:43546
  58. Marckert JR Jr, Evans AL. Effect of cooling rate on leucite volume fraction in dental porcelains. J Dent Res 1991;70:137-9 https://doi.org/10.1177/00220345910700020801
  59. Marckert JR Jr, Rueggeberg FA, Lockwood PE, Evans AL, Thompson WO. Isothermal anneal effect on microcrack density around leucite particles in dental porcelain. J Dent Res 1994;73:1221-7 https://doi.org/10.1177/00220345940730061401
  60. Fairhurst CW, Morena R, Lockwood P, Ringle R. A study of flaw size in porcelain. J Dent Res 1994; 73:370, Abstr. No. 2144
  61. Anusavice KJ, DeHoff PH, Hoijatie B, Gray A. Influence of tempering and contraction mismatch on crack development in ceramic surfaces. J Dent Res 1989;70:131-6
  62. Rice RW, Mecholsky JJ. The science of ceramic machining and surface finishing Ill. National Bureau of Standards, US Printing Office 1977;562:352-60
  63. Johnson-Walls D, Evans AG, Marshall DB, James MR. Residual stress in machined ceramic surfaces. J Amer Ceram Soc 1986;69(1):44-7 https://doi.org/10.1111/j.1151-2916.1986.tb04691.x