Journal of Prosthetic Dentistry
Volume 87, Issue 3 , Pages 248-255 , March 2002

Influence of different convergence angles and tooth preparation heights on the internal adaptation of Cerec crowns

References 

  1. Calamia JR. Advances in computer-aided design and computer-aided manufacture technology. In: 2nd ed.  Golub-Evans J editors. Current opinion cosmetic dentistry. Philadephia: : Current Science; 1994;p. 67–73
  2. Hickel R, Dasch W, Mehl A, Kremers L. CAD/CAM—fillings of the future?. Int Dent J. 1997;47:247–258
  3. Siervo S, Pampalone A, Siervo P, Siervo R. Where is the gap? Machinable ceramic systems and conventional laboratory restorations at a glance. Quintessence Int. 1994;25:773–779
  4. Hass M, Arnetzi G, Pertl C, Polansky R, Smetan M. Cerec and dental technicians. CAD/CIM in aesthetic dentistry—Cerec 10-year anniversary symposium. In: Berlin, Germany: : Quintessence Publishing Co; 1996;p. 293–298
  5. Magne P, Dietschi D, Holz J. An in vitro evaluation of the internal seals of CEREC overlays. Quintessence Int. 1991;22:425–441
  6. Schmalz G, Reich E, Federlin M. Gap dimension and marginal quality of Cerec inlays in vitro. In:  Mörmann WH editors. International symposium on computer restorations. Proceedings. Chicago: : Quintessence Publishing Co; 1991;p. 441–452
  7. Mörmann WH, Krejci I. Clinical and SEM evaluation of Cerec inlays after 5 years in situ. In:  Mörmann WH editors. International symposium on computer restorations. Proceedings. Chicago: : Quintessence Publishing Co; 1991;p. 25–32
  8. Mörmann WH, Bindl A, Luthy H, Rathke A. Effects of preparation and luting system on all-ceramic computer-generated crowns. Int J Prosthodont. 1998;11:333–339
  9. Molin MK, Karlsson SL, Kristiansen MS. Influence of film thickness on joint bend strength of a ceramic/resin composite joint. Dent Mater. 1996;12:245–249
  10. Leinfelder KF, Isenberg BP, Essig ME. A new method for generating ceramic restorations: a CAD-CAM system. J Am Dent Assoc. 1989;118:703–707
  11. Sjögren G. Marginal and internal fit of four different types of ceramic inlays after luting. An in vitro study. Acta Odontol Scand. 1995;53:24–28
  12. Feilzer AJ, De Gee AJ, Davidson CL. Increased wall-to-wall curing contraction in thin bonded resin layers. J Dent Res. 1989;68:48–50
  13. Rees JS, Jacobsen PH. Stresses generated by luting resins during cementation of composite and ceramic inlays. J Oral Rehabil. 1992;19:115–122
  14. Mörmann WH, Brandestini M. The fundamental inventive principles of Cerec CAD/CAM and other CAD/CAM methods. CAD/CIM in aesthetic dentistry—Cerec 10-year anniversary symposium. In: Berlin, Germany: : Quintessence Publishing Co; 1996;p. 81–110
  15. Mörmann WH, Bindl A, Richter B, Apholt W, Toth RT. In: CEREC computer aided design/computer integrated manufacturing. Vol. 2:Zurich, Switzerland: : Foundation for the Advancement of Computer-Assisted Dentistry Publishers; 1999;p. 21
  16. Mörmann WH, Schug J. Grinding precision and accuracy of fit of CEREC 2 CAD-CIM inlays. J Am Dent Assoc. 1997;128:47–53
  17. Mörmann W. The right step to Cerec 3. Int J Comput Dent. 2000;3:3–4
  18. Bindl A, Windisch S, Mörmann WH. Full-ceramic CAD/CIM anterior crowns and copings. Int J Comput Dent. 1999;2:97–111
  19. Dodge WW, Weed RM, Baez RJ, Buchanan RN. The effect of convergence angle on retention and resistance form. Quintessence Int. 1985;16:191–194
  20. Eames WB, O'Neal SJ, Monteiro J, Miller C, Roan JD, Cohen KS. Techniques to improve the seating of castings. J Am Dent Assoc. 1978;96:432–437
  21. Ohm E, Silness J. The convergence angle in teeth prepared for artificial crowns. J Oral Rehabil. 1978;5:371–375
  22. Mack PJ. A theoretical and clinical investigation into the taper achieved on crown and inlay preparations. J Oral Rehabil. 1980;7:255–265
  23. Nordlander J, Weir D, Stoffer W, Ochi S. The taper of clinical preparations for fixed prosthodontics. J Prosthet Dent. 1988;60:148–151
  24. Sarafianou A, Kafandaris NM. Effect of convergence angle on retention of resin-bonded retainers cemented with resinous cements. J Prosthet Dent. 1997;77:475–481
  25. Doyle MG, Goodacre CJ, Munoz CA, Andres CJ. The effect of tooth preparation design on the breaking strength of Dicor crowns: 3. Int J Prosthodont. 1990;3:327–340
  26. Hembree JH. Comparisons of fit of CAD-CAM restorations using three imaging surfaces. Quintessence Int. 1995;26:145–147
  27. Wiedhahn K. The optical Cerec impression—electronic model production. Int J Comput Dent. 1998;1:41–54
  28. May KB, Russel MM, Razzoog ME, Lang BR. Precision of fit: the Procera AllCeram crown. J Prosthet Dent. 1998;80:394–404
  29. Boening KW, Wolf BH, Schmidt AE, Kastner K, Walter MH. Clinical fit of Procera AllCeram crowns. J Prosthet Dent. 2000;84:419–424
  30. Kelly JR, Davis SH, Campbell SD. Nondestructive, three-dimensional internal fit mapping of fixed prostheses. J Prosthet Dent. 1989;61:368–373
  31. McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J. 1971;131:107–111
  32. Harris IR, Wickens JL. A comparison of the fit of spark-eroded titanium copings and cast gold alloy copings. Int J Prosthodont. 1994;7:348–355
  33. Wang CJ, Millstein PL, Nanthanson D. Effects of cement, cement space, marginal design, seating aid materials, and seating force on crown cementation. J Prosthet Dent. 1992;67:786–790

 This study was supported by the National Taiwan University Hospital (Grant No. NTUH.S90-1500-70).

☆☆ aGraduate student, Department of Prosthodontics.

 bAssistant Professor, Department of Prosthodontics.

★★ cAssociate Professor and Chairman, Department of Prosthodontics.

 dProfessor, Department of Prosthodontics.

♢♢ Reprint requests to: Dr Yuh-Yuan Shiau, Department of Prosthodontics, School of Dentistry, National Taiwan University, No. 1 Chang-Te St, Taipei, Taiwan, Fax: (886)2-2389-3211, E-mail: yyshiau@ha.mc.ntu.edu.tw

PII: S0022-3913(02)72737-6

doi: 10.1067/mpr.2002.122011

Journal of Prosthetic Dentistry
Volume 87, Issue 3 , Pages 248-255 , March 2002