The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 20 , ISSUE 3 ( March, 2019 ) > List of Articles


Analysis of Vertical Misfit of Crowns Fabricated with CAD/CAM Technology using Two Scanning Techniques: Direct and Indirect

Wilson M Junior, Cleuber R de S Bueno, José R de AC Filho, Luciane SA Osorio, Maria C Neves, Joel FS Junior, Hugo N Filho

Keywords : Computer-aided design/computer-aided manufacturing, Dental crown, Digital impression, Marginal gap

Citation Information : Junior WM, Bueno CR, Filho JR, Osorio LS, Neves MC, Junior JF, Filho HN. Analysis of Vertical Misfit of Crowns Fabricated with CAD/CAM Technology using Two Scanning Techniques: Direct and Indirect. J Contemp Dent Pract 2019; 20 (3):285-290.

DOI: 10.5005/jp-journals-10024-2511

License: CC BY-NC 4.0

Published Online: 01-04-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: The study evaluated the marginal vertical misfit of feldspathic ceramic crowns fabricated by the computer-aided design (CAD)/computer-aided manufacturing (CAM) technology and compared the two methods of scanning techniques: direct digital impression and indirect digital impression. Materials and methods: The titanium specimens were divided into two groups: scanning with the direct digital impression (DDI) at the milled prosthetic abutment level and indirect digital impression (IDI) at the cast model and after milled feldspathic ceramics blocks. Vertical marginal misfit was analyzed. The t-test was used for the analysis of the comparison factor between the groups and the one-way analysis of variance (ANOVA) test, and post hoc Tukey test was used to compare the variance of crown analysis regions within the group. A significance level of 5% was considered for the analyses. Results: There was no significant difference in vertical marginal misfit between the groups of DDI and IDI (p = 0.345). In relation to each region measured within the studied groups, it was observed the similarity between the six regions analyzed in the DDI group (p > 0.05) and IDI group, a significant difference between two areas. Conclusion: The vertical marginal adaptation was similar between digital scanning methods. Based on the data evaluated, vertical marginal adaptation indices were within acceptable clinical standards. Clinical significance: The direct digital scanning in unit bodies was reliable, pointing that the coating of titanium dioxide in the titanium abutment did not negatively influence the vertical marginal adaptation of the feldspathic ceramic crowns.

PDF Share
  1. Katsoulis J, Müller P, Mericske-Stern R, et al. CAD/CAM fabrication accuracy of long- vs. short-span implant-supported FDPs. Clin Oral Implants Res 2015;26(3):245-249.
  2. Mello C, Santiago Junior JF, et al. Analysis of Vertical Marginal Adaptation of Zirconia Fixed Dental Prosthesis Frameworks Fabricated by the CAD/CAM System: A Randomized, Double-Blind Study. Int J Prosthodont 2016;29(2): 157-160.
  3. de França DG, Morais MH, das Neves FD, et al. Precision Fit of Screw-Retained Implant-Supported Fixed Dental Prostheses Fabricated by CAD/CAM, Copy-Milling, and Conventional Methods. Int J Oral Maxillofac Implants 2017;32(3):507-513.
  4. Al-Fouzan AF, Al-Mejrad LA, Albarrag AM. Adherence of Candida to complete denture surfaces in vitro: A comparison of conventional and CAD/CAM complete dentures. J Adv Prosthodont 2017;9(5):402-408.
  5. Mounajjed R, Salinas TJ, Ingr T, et al. Effect of different resin luting cements on the marginal fit of lithium disilicate pressed crowns. J Prosthet Dent 2017.
  6. McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J 1971;131: 107-111.
  7. Boitelle P, Mawussi B, Tapie L, Fromentin O. A systematic review of CAD/CAM fit restoration evaluations. J Oral Rehabil 2014;41:853-874.
  8. Dauti R, Cvikl B, Franz A, et al. Comparison of marginal fit of cemented zirconia copings manufactured after digital impression with lava™ C.O.S and conventional impression technique. BMC Oral Health 2016;16(1):129.
  9. Haghi HR, Shiehzadeh M, Nakhaei M, et al. Effect of technique and impression material on the vertical misfit of a screw-retained, three-unit implant bridge: An in vitro study. J Indian Prosthodont Soc 2017;17(1):41-47.
  10. Imburgia M, Logozzo S, Hauschild U, et al. Accuracy of four intraoral scanners in oral implantology: a comparative in vitro study. BMC Oral Health 2017;17(1):92.
  11. Yuzbasioglu E, Kurt H, Turunc R, et al. Comparison of digital and conventional impression techniques: evaluation of patients’ perception, treatment comfort, effectiveness and clinical outcomes. BMC Oral Health 2014;14:10.
  12. Ahlholm P, Sipilä K, Vallittu P, et al. Digital Versus Conventional Impressions in Fixed Prosthodontics: A Review. Prosthodont 2016.
  13. Basaki K, Alkumru H, De Souza G, et al. Accuracy of Digital vs. Conventional Implant Impression Approach: A Three- Dimensional Comparative In Vitro Analysis. Int J Oral Maxillofac Implants 2017;32(4):792–799.
  14. Alikhasi M, Alsharbaty MHM, Moharrami M. Digital Implant Impression Technique Accuracy: A Systematic Review. Implant Dent 2017;26(6):929-935.
  15. Guess PC, Zavanelli RA, Silva NR, et al. Monolithic CAD/ CAM lithium disilicate versus veneered Y-TZP crowns: comparison of failure modes and reliability after fatigue. Int J Prosthodont 2010;23:434-442.
  16. Beuer F, Edelhoff D, Gernet W, et al. Effect of preparation angles on the precision of zirconia crown copings fabricated by CAD/CAM system. Dent Mater J 2008;27: 814-820.
  17. Patzelt SB, Bishti S, Stampf S, et al. Fit of CAD/CAM implant frameworks: a comprehensive review. J Am Dent Assoc 2014;145(11):1133-1140.
  18. Ribeiro IL, Campos F, Sousa RS, et al. Marginal and internal discrepancies of zirconia copings: effects of milling system and finish line design. Indian J Dent Res 2015;26(1):15-20.
  19. Contrepois M, Soenen A, Bartala M, et al. Marginal adaptation of ceramic crowns: a systematic review. J Prosthet Dent 2013;110:447-454.
  20. Shembesh M, Ali A, Finkelman M, et al. An In Vitro Comparison of the Marginal Adaptation Accuracy of CAD/CAM Restorations Using Different Impression Systems. J Prosthodont 2017;26(7):581-586.
  21. Abdel-Azim T, Rogers K, Elathamna E, et al. Assessing the Fit of Implant Fixed Prostheses: A Critical Review. Int J Oral Maxillofac Implants 2010;25:506-515.
  22. Ng J, Ruse D, Wyatt C. A comparison of the marginal fit of crowns fabricated with digital and conventional methods. J Prosthet Dent 2014;112(3):555-560.
  23. Holmes JR, Bayne SC, Holland GA, et al. Considerations in measurement of marginal fit. J Prosthet Dent 1989;62(4):405-408.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.