International Journal of Prosthodontics and Restorative Dentistry

Register      Login

VOLUME 8 , ISSUE 3 ( July-September, 2018 ) > List of Articles


Computer-aided Design/Computer-aided Manufacturing Generated Ceramic Post and Core

Delsaz Sultan, Robert L Engelmeier, Thomas Kunkel, Mohsen Azarbal

Keywords : Computer-aided Design/Computer-aided Manufacturing, Clinical restorative dentistry, Dental prosthodontics, Restoration

Citation Information : Sultan D, Engelmeier RL, Kunkel T, Azarbal M. Computer-aided Design/Computer-aided Manufacturing Generated Ceramic Post and Core. Int J Prosthodont Restor Dent 2018; 8 (3):72-78.

DOI: 10.5005/jp-journals-10019-1209

License: CC BY-NC 4.0

Published Online: 05-05-2022

Copyright Statement:  Copyright © 2018; Jaypee Brothers Medical Publishers (P) Ltd.


Purpose: To evaluate the efficacy of computer-aided design/computer-aided manufacturing (CAD/CAM) technology to fabricate an all-ceramic post and core restoration. Materials and methods: Two master dies fabricated from a polymer material were used in this study (Acadental T Endo TM series RT_AE 401_0®8). The coronal portion of the die simulated an ideal core preparation with a 1.5 mm to 2.0 mm ferrule. The intracanal space for the first and second dies were prepared for a post length of 10 mm and 14 mm respectively. Each die was scanned 20 times. A total of 40 e.max® CAD/CAM post and core restorations were milled. The restorations were evaluated for a precision of fit by measuring marginal gap for each post and core restoration using scanning electron microscopy and by taking radiograph to determine the post length. Results: Results revealed that: (a) Chairside CAD/CAM Technology (Sirona CEREC BlueCam®) could produce directly all ceramic post and core restorations up to 10.0 mm of canal depth. (b) There was no pattern of relationship between the marginal gap and post lengths when comparing the two test groups. Conclusion: The least detectable gap was 5 microns, and the greatest was 100 microns. The marginal gap results found in this study met clinically acceptable standards.

PDF Share
  1. Cheung WA. Review of the management of endodontically treated teeth. Post, core and the final restoration. J Am Dent Assoc 2005;136:611-619.
  2. Liu P, Deng XL, Wang XZ. Use of a CAD/CAM-fabricated glass fiber post and core to restore fractured anterior teeth: A clinical report. The Journal of prosthetic dentistry. 2010 Jun 1;103(6):330-333.
  3. Albers HF. Core build-ups and posts, ADEPT Report 1993;4: 25-35.
  4. Carossa S, Lombardo S, Pera P, Corsalini M, Rastello ML, Preti PG. Influence of posts and cores on light transmission through different all-ceramic crowns: spectrophotometric and clinical evaluation. Int J Prosthodont 2001;14:9-14.
  5. Vichi A, Ferrari M, Davidson CL. Influence of ceramic and cement thickness on the masking of various types of opaque posts. J Prosthet Dent 2000;83:412-17.
  6. Sadek FT, Monticelli F, Goracci C, Tay FR, Cardoso PE, Ferrari M. Bond strength performance of different resin composites used as core materials around fiber posts. Dent Mater 2007;23:95-99.
  7. Plotino G, Grande NM, Bedini R, Pameijer CH, Somma F. Flexural properties of endodontic posts and human root dentin. Dent Mater 2007;23:1129-1135.
  8. Plasmans PJ, Visseren LG, Vrijhoef MM, Kayser AF. In vitro comparison of dowel and core techniques forendodontically treated molars. J Endod 1986;12:382-387.
  9. Bittner N, Hill T, Randi A. Evaluation of a one-piece milled zirconia post and core with different post and core systems: An in vitro study. J Prosthet Dent 2010;103:369-379.
  10. Falcao Spina DR, Goulart da Costa R, Farias IC, da Cunha LG, Ritter AV, Gonzaga CC, et al. CAD/CAM post-and core using different esthetic materials: Fracture resistanceand bond strengths. Am J Dent 2017;6:299-304.
  11. Vano M, Goracci C, Monticelli F, Tognini F, Gabriele M, Tay FR, et al. The adhesion between fiber posts and composite resin cores: the evaluation of microtensile bond strength following various surface chemical treatments to posts. Int Endo J 2006;39:31-39.
  12. Tsintsadze N, Juloski J, Carrabba M, Tricarico M, Goracci C, Vichi A, et al. Performance of CAD/CAM fabricated fiber posts in oval-shaped root canals: An in vitro study. Am J Dent 2017;5:248-254.
  13. Balkenhol M, Wostmann B, Rein C, Ferger P. Survival time of cast post and cores: a 10-year retrospective study. J Dent 2007;35:50-58.
  14. Ferrari M, Cagidiaco MC, Goracci C, Vichi A, Mason PN, Radovic I, et al. Long-term retrospective study of the clinical performance of fiber posts. Am J Dent 2007;20:287-291.
  15. Assif D, Gorfil C. Biomechanical considerations in restoring endodontically treated teeth. J Prosthet Dent 1994;71: 565-567.
  16. Fraga RC, Chaves BT, Mello GS, Siqueira JF Jr. Fracture resistance of endodontically treated roots after restoration. J Oral Rehab 1998;25:809-813.
  17. Passos L, Barino B, Laxe L, Street A. Fracture resistance of single-rooted pulpless teeth using hybrid CAD/CAM blocks for post and core restoration. Int J Comput Dent 2017;20: 287-301.
  18. Falcao Spina DR, da Costa RG, Correr GM, Rached RN. Scanning of root canal impression for the fabrication of a resin CAD/CAM customized post and core. J Prosthet Dent 2018; 120:242-245.
  19. Zhou TF, Wang XZ. Clinical observation of the restoration of computer aided designed and manufactured one-piece zirconia posts and cores: a 5-year prospective follow-up study. Beijing Da Xue Xue Bao Yi Xue Ban. 2018;50(4):680-684.
  20. Bex RT, Parker MW, Judkins JT, Pelleu GB Jr. Effect of dentinal bonded resin post-core preparations on resistance to vertical root fracture. J Prosthet Dent 1992;67:768-772.
  21. Saupe WA, Gluskin AH, Radke RA Jr. A comparative study of fracture resistance between morphologic dowel and cores and a resin-reinforced dowel system in the intraradicular restoration of structurally compromised roots. Quintessence Int 1996;27:483491.
  22. Fasbinder D. Computerized technology for restorative dentistry. Am J Dent 2013; 26:3:115-120.
  23. Patzelt SBM, Lamprinos C, Strub JR, Att W. The efficacy of different intraoral scanners. J Dent Res 2013;92 (Sp Is A): Abstr464.
  24. Givan DA, Burgess JO, O'Neal SJ, Aponte AA. Prospective evaluation of ceramic crowns by digital and conventional impressions. J Dent Res 2011;90(Sp Is A): Abstr 380.
  25. Seelbach P, Brueckel C, Wostmann B. Accuracy of digital and conventional impression techniques and workflow. Clin Oral Investig 2013;17:1759-1764.
  26. Fasbinder DJ. Chairside CAD/CAM: an overview of restorative material options. Compend. Contin Edu Dent 2012; 33:52-58.
  27. Ellingsen LA, Fasbinder DJ. In vitro evaluation of CAD/CAM ceramic crowns. J Dent Res 2002;81(Sp Is A): Abstr 2640.
  28. Personal communication with Dr. Richard Fox Sirona clinical advisor USA and Mr Adam Busch CEREC product manager Sirona USA.
  29. American Dental Association: ANSI/ADA Specification No. 8 for zinc phosphate cement. Guide to Dental Materials and Devices (ed 5). Chicago, American Dental Association, 1970-1971.
  30. Christensen G. Clinical and research advancements in castgold restorations. J Prosthet Dent 1971;25:62-68.
  31. Lofstrom LH, Barakat MM. Scanning electron microscopic evaluation of clinically cemented cast gold restorations. J Prosthet Dent 1989;61:664-669.
  32. Bindl A, Mormann WH. Fit of all-ceramic posterior fixed partial denture frameworks in vitro. Int J Periodontics Restorative Dent 2007;27:567-575.
  33. 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.
  34. Beuer F, Naumann M, Gernet W, Sorensen JA. Precision of fit: zirconia three-unit fixed dental prostheses. Clin Oral Invest 2010;141: suppl 2:5S-9S.
  35. Gonzalo E, Suarez MJ, Serrano B, Lozano JF. Marginal fit of zirconia posterior fixed partial dentures. Int J Prosthodont 2008;21:398-399.
  36. Coli P, Karlsson S. Precision of a CAD/CAM technique for the production of zirconium dioxide copings. Int J Prosthodont 2004;17:577-580.
  37. Poticny DJ, Klim J. CAD/CAM in-office technology: innovations after 25 years for predictable, esthetic outcomes. J Am Dent Assoc 2010;141: suppl 2:5S-9S.
  38. Birnbaum NS, Aaronson HB, Stevens C, Cohen B. 3D digital scanners: a high-tech approach to more accurate dental impressions. Inside Dent 2009;5:70-74.
  39. Torabinejad M, Fouad A, Walton R. Endodontics Principles and Practices, ed 5. Saunders, 2014.
  40. Fan B, Wu MK, Wessenlink PR. Coronal leakage along apical root fillings after immediate and delayed post space preparation. Endo Dent Traumatol 1999;15:124-126.
  41. Goodacre CJ, Spolnik KJ. The prosthodontic management of endodontically treated teeth: a literature review Part II. Maintaining the apical seal. J Prosthodont 1995;4:51-53.
  42. Abou-Rass M, Jann JM, Jobe D, Tsutsui F. Preparation of space for posting: effect of thickness of canal walls and incidence of perforation in molars. J Am Dent Assoc 1982;104:834-837.
  43. Shillingburg HT, Kcssler JC, Wilson EL. Root dimensions and dowel size. Cal Dent Assoc J 1982;10:43-49.
  44. Zillich RM, Corcoran JF. Average maximum post lengths in endodontically treated teeth. J Prosthet Dent 1984;52: 489-491.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.