The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Fitting accuracy of ceramic veneered Co-Cr crowns produced by different manufacturing processes

  • Received : 2019.12.19
  • Accepted : 2020.02.25
  • Published : 2020.04.30
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Abstract

PURPOSE. The purpose of this in vitro study was to evaluate the fitting accuracy of single crowns made from a novel presintered Co-Cr alloy prepared with a computer-aided design and computer-aided manufacturing (CAD/CAM) technique, as compared with crowns manufactured by other digital and the conventional casting technique. Additionally, the influence of oxide layer on the fitting accuracy of specimens was tested. MATERIALS AND METHODS. A total of 40 test specimens made from Co-Cr alloy were investigated according to the fitting accuracy using a replica technique. Four different methods processing different materials were used for the manufacture of the crown copings (milling of presintered (Ceramill Sintron-group_cer_sin) or rigid alloy (Tizian NEM-group_ti_nem), selective laser melting (Ceramill NPL-group_cer_npl), and casting (Girobond NB-group_gir_nb)). The specimens were adapted to a resin model and the outer surfaces were airborne-particle abraded with aluminum oxide. After the veneering process, the fitting accuracy (absolute marginal discrepancy and internal gap) was evaluated by the replica technique in 2 steps, before removing the oxide layer from the intaglio surface of the crowns, and after removing the layer with aluminum oxide airborne-particle abrasion. Statistical analysis was performed by multifactorial analysis of variance (ANOVA) (α=.05). RESULTS. Mean absolute marginal discrepancy ranged between 20 ㎛ (group_cer_npl for specimens of Ceramill NPL) and 43 ㎛ (group_cer_sin for crowns of Ceramill Sintron) with the oxide layer and between 19 ㎛ and 28 ㎛ without the oxide layer. The internal gap varied between 33 ㎛ (group_ti_nem for test samples of Tizian NEM) and 75 ㎛ (group_gir_nb for the base material Girobond NB) with the oxide layer and between 30 ㎛ and 76 ㎛ without the oxide layer. The absolute marginal discrepancy and the internal gap were significantly influenced by the fabrication method used (P<.05). CONCLUSION. Different manufacturing techniques had a significant influence on the fitting accuracy of single crowns made from Co-Cr alloys. However, all tested crowns showed a clinically acceptable absolute marginal discrepancy and internal gap with and without oxide layer and could be recommended under clinical considerations. Especially, the new system Ceramill Sintron showed acceptable values of fitting accuracy so it can be suggested in routine clinical work.

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References

  1. Hunter AJ, Hunter AR. Gingival margins for crowns: a review and discussion. Part II: Discrepancies and configurations. J Prosthet Dent 1990;64:636-42. https://doi.org/10.1016/0022-3913(90)90286-L
  2. Fusayama T. Factors and technique of precision casting part II. J Prosthet Dent 1959;9:486-97. https://doi.org/10.1016/0022-3913(59)90081-2
  3. Quante K, Ludwig K, Kern M. Marginal and internal fit of metal-ceramic crowns fabricated with a new laser melting technology. Dent Mater 2008;24:1311-5. https://doi.org/10.1016/j.dental.2008.02.011
  4. Beuer F, Aggstaller H, Edelhoff D, Gernet W, Sorensen J. Marginal and internal fits of fixed dental prostheses zirconia retainers. Dent Mater 2009;25:94-102. https://doi.org/10.1016/j.dental.2008.04.018
  5. Quintas AF, Oliveira F, Bottino MA. Vertical marginal discrepancy of ceramic copings with different ceramic materials, finish lines, and luting agents: an in vitro evaluation. J Prosthet Dent 2004;92:250-7. https://doi.org/10.1016/j.prosdent.2004.06.023
  6. Rai R, Kumar SA, Prabhu R, Govindan RT, Tanveer FM. Evaluation of marginal and internal gaps of metal ceramic crowns obtained from conventional impressions and casting techniques with those obtained from digital techniques. Indian J Dent Res 2017;28:291-7. https://doi.org/10.4103/ijdr.IJDR_81_17
  7. Rekow D, Thompson VP. Near-surface damage--a persistent problem in crowns obtained by computer-aided design and manufacturing. Proc Inst Mech Eng H 2005;219:233-43. https://doi.org/10.1243/095441105X9363
  8. Ortengren U, Elgh U, Spasenoska V, Milleding P, Haasum J, Karlsson S. Water sorption and flexural properties of a composite resin cement. Int J Prosthodont 2000;13:141-7.
  9. Silva NR, de Souza GM, Coelho PG, Stappert CF, Clark EA, Rekow ED, Thompson VP. Effect of water storage time and composite cement thickness on fatigue of a glass-ceramic trilayer system. J Biomed Mater Res B Appl Biomater 2008;84:117-23.
  10. Oysaed H, Ruyter IE. Composites for use in posterior teeth: mechanical properties tested under dry and wet conditions. J Biomed Mater Res 1986;20:261-71. https://doi.org/10.1002/jbm.820200214
  11. Siadat H, Alikhasi M, Mirfazaelian A, Zade MM. Scanning electron microscope evaluation of vertical and horizontal discrepancy in cast copings for single-tooth implant-supported prostheses. Implant Dent 2008;17:299-308. https://doi.org/10.1097/ID.0b013e318183621d
  12. McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J 1971;131:107-11. https://doi.org/10.1038/sj.bdj.4802708
  13. Iglesias A, Powers JM, Pierpont HP. Accuracy of wax, autopolymerized, and light-polymerized resin pattern materials. J Prosthodont 1996;5:201-5. https://doi.org/10.1111/j.1532-849x.1996.tb00297.x
  14. Kohorst P, Junghanns J, Dittmer MP, Borchers L, Stiesch M. Different CAD/CAM-processing routes for zirconia restorations: influence on fitting accuracy. Clin Oral Investig 2011;15:527-36. https://doi.org/10.1007/s00784-010-0415-9
  15. Tjan AH, Li T, Logan GI, Baum L. Marginal accuracy of complete crowns made from alternative casting alloys. J Prosthet Dent 1991;66:157-64. https://doi.org/10.1016/S0022-3913(05)80041-1
  16. Wassell RW, Walls AW, Steele JG. Crowns and extra-coronal restorations: materials selection. Br Dent J 2002;192:199-202, 205-11. https://doi.org/10.1038/sj.bdj.4801334
  17. Nesse H, Ulstein DM, Vaage MM, Oilo M. Internal and marginal fit of cobalt-chromium fixed dental prostheses fabricated with 3 different techniques. J Prosthet Dent 2015;114:686-92. https://doi.org/10.1016/j.prosdent.2015.05.007
  18. Mai HN, Kwon TY, Hong MH, Lee DH. Comparative study of the fit accuracy of full-arch bar frameworks fabricated with different presintered cobalt-chromium alloys. Biomed Res Int 2018;2018:1962514. https://doi.org/10.1155/2018/1962514
  19. Vojdani M, Torabi K, Atashkar B, Heidari H, Torabi Ardakani M. A Comparison of the marginal and internal fit of cobaltchromium copings fabricated by two different CAD/CAM systems (CAD/ Milling, CAD/ Ceramill Sintron). J Dent (Shiraz) 2016;17:301-8. https://doi.org/10.1016/0300-5712(89)90047-X
  20. Kane LM, Chronaios D, Sierraalta M, George FM. Marginal and internal adaptation of milled cobalt-chromium copings. J Prosthet Dent 2015;114:680-5. https://doi.org/10.1016/j.prosdent.2015.04.020
  21. Tamac E, Toksavul S, Toman M. Clinical marginal and internal adaptation of CAD/CAM milling, laser sintering, and cast metal ceramic crowns. J Prosthet Dent 2014;112:909-13. https://doi.org/10.1016/j.prosdent.2013.12.020
  22. Ucar Y, Akova T, Akyil MS, Brantley WA. Internal fit evaluation of crowns prepared using a new dental crown fabrication technique: laser-sintered Co-Cr crowns. J Prosthet Dent 2009;102:253-9. https://doi.org/10.1016/S0022-3913(09)60165-7
  23. Holmes JR, Sulik WD, Holland GA, Bayne SC. Marginal fit of castable ceramic crowns. J Prosthet Dent 1992;67:594-9. https://doi.org/10.1016/0022-3913(92)90153-2
  24. Kohorst P, Brinkmann H, Li J, Borchers L, Stiesch M. Marginal accuracy of four-unit zirconia fixed dental prostheses fabricated using different computer-aided design/computer-aided manufacturing systems. Eur J Oral Sci 2009;117:319-25. https://doi.org/10.1111/j.1600-0722.2009.00622.x
  25. Mously HA, Finkelman M, Zandparsa R, Hirayama H. Marginal and internal adaptation of ceramic crown restorations fabricated with CAD/CAM technology and the heatpress technique. J Prosthet Dent 2014;112:249-56. https://doi.org/10.1016/j.prosdent.2014.03.017
  26. Nawafleh NA, Mack F, Evans J, Mackay J, Hatamleh MM. Accuracy and reliability of methods to measure marginal adaptation of crowns and FDPs: a literature review. J Prosthodont 2013;22:419-28. https://doi.org/10.1111/jopr.12006
  27. Boening KW, Wolf BH, Schmidt AE, Kastner K, Walter MH. Clinical fit of Procera AllCeram crowns. J Prosthet Dent 2000;84:419-24. https://doi.org/10.1067/mpr.2000.109125
  28. Praca L, Pekam FC, Rego RO, Radermacher K, Wolfart S, Marotti J. Accuracy of single crowns fabricated from ultrasound digital impressions. Dent Mater 2018;34:e280-8. https://doi.org/10.1016/j.dental.2018.08.301
  29. Al Hamad KQ, Al Rashdan BA, Al Omari WM, Baba NZ. Comparison of the fit of lithium disilicate crowns made from conventional, digital, or conventional/digital techniques. J Prosthodont 2019;28:e580-6. https://doi.org/10.1111/jopr.12961
  30. Harris IR, Wickens JL. A comparison of the fit of sparkeroded titanium copings and cast gold alloy copings. Int J Prosthodont 1994;7:348-55.
  31. Zimmermann M, Valcanaia A, Neiva G, Mehl A, Fasbinder D. Digital evaluation of the fit of zirconia-reinforced lithium silicate crowns with a new three-dimensional approach. Quintessence Int 2018;49:9-15.
  32. Abduo J, Lyons K, Swain M. Fit of zirconia fixed partial denture: a systematic review. J Oral Rehabil 2010;37:866-76. https://doi.org/10.1111/j.1365-2842.2010.02113.x
  33. Laurent M, Scheer P, Dejou J, Laborde G. Clinical evaluation of the marginal fit of cast crowns-validation of the silicone replica method. J Oral Rehabil 2008;35:116-22. https://doi.org/10.1111/j.1365-2842.2003.01203.x
  34. Rahme HY, Tehini GE, Adib SM, Ardo AS, Rifai KT. In vitro evaluation of the "replica technique" in the measurement of the fit of Procera crowns. J Contemp Dent Pract 2008;9:25-32.
  35. Holmes JR, Bayne SC, Holland GA, Sulik WD. Considerations in measurement of marginal fit. J Prosthet Dent 1989;62:405-8. https://doi.org/10.1016/0022-3913(89)90170-4
  36. Hung SH, Hung KS, Eick JD, Chappell RP. Marginal fit of porcelain-fused-to-metal and two types of ceramic crown. J Prosthet Dent 1990;63:26-31. https://doi.org/10.1016/0022-3913(90)90260-J
  37. Goldman M, Laosonthorn P, White RR. Microleakage-full crowns and the dental pulp. J Endod 1992;18:473-5. https://doi.org/10.1016/S0099-2399(06)81345-2
  38. Bhaskaran E, Azhagarasan NS, Miglani S, Ilango T, Krishna GP, Gajapathi B. Comparative evaluation of marginal and internal gap of Co-Cr copings fabricated from conventional wax pattern, 3D printed resin pattern and DMLS tech: An in vitro study. J Indian Prosthodont Soc 2013;13:189-95.
  39. Vojdani M, Torabi K, Farjood E, Khaledi A. Comparison the marginal and internal fit of metal copings cast from wax patterns fabricated by CAD/CAM and conventional wax up techniques. J Dent (Shiraz) 2013;14:118-29.
  40. Striezel R, Lahl C. CAD/CAM-systems in laboratory and practice. The name of publisher is double, so that we can delete one. Verlag Neuer Merkur, Munchen; 2007.
  41. Rosel M. Investigations of the retention of cast crowns as a function of the cement gap width and type of cement. Halle-Wittenberg; 2004.
  42. Gonzalo E, Suarez MJ, Serrano B, Lozano JF. A comparison of the marginal vertical discrepancies of zirconium and metal ceramic posterior fixed dental prostheses before and after cementation. J Prosthet Dent 2009;102:378-84. https://doi.org/10.1016/S0022-3913(09)60198-0