Cementation Protocol for Bonding Zirconia Crowns to Titanium Base CAD/CAM Abutments

Abbas Zahoui, Edmara T.P. Bergamo, Manoela M. Marun, Kimberly P. Silva, Paulo G. Coelho, Estevam A. Bonfante

Research output: Contribution to journalArticlepeer-review


Purpose: To establish the most effective cementation protocol for bonding zirconia crowns to Ti-Base CAD/CAM abutments in terms of abutment height, cement type, and surface pretreatment. Materials and Methods: Zirconia crowns were designed to fit abutments of 2.5-mm (short) and 4.0-mm (tall) height. The retention of conventional resin cement with a universal adhesive (RelyX Ultimate, 3M ESPE) was compared to self-adhesive resin cement (RelyX U200, 3M ESPE) following different surface pretreatments (n = 10/group): (1) no treatment (NT); (2) Ti-Base abutment surface blasting with alumina particles (SB); (3) zirconia crown tribochemical surface blasting with silica-coated alumina particles (TBS); and (4) a combination of SB + TBS. Pull-out testing was performed in a universal testing machine. Data were statistically evaluated using a linear mixed model following least significant difference post hoc test. Results: Pull-out data as a function of Ti-Base height demonstrated higher retention for tall compared to short abutments (P <.001). Ultimate outperformed U200 cement (data collapsed over height and pretreatment) (P <.001). Analysis of pretreatment depicted higher retention for SB + TBS, followed by SB, TBS, and NT (P <.04). The interaction between Ti-Base height and cement type highlighted the superior adhesive strength of Ultimate compared to U200 for both heights (P <.001). Irrespective of type of pretreatment, surface pretreatment improved the retention for U200 cement and short Ti-Base (P <.03 compared to NT). In contrast, higher retention was demonstrated for SB + TBS, followed by SB, TBS, and NT, for Ultimate cement combined with tall Ti-Base (P <.02) (data collapsed over height and cement, respectively). Conclusion: There was a direct relationship among Ti-Base height, micromechanical and/or chemical pretreatment, and conventional adhesive bonding in improving the retention of zirconia crowns. Int J Prosthodont 2020;33:527-535. doi: 10.11607/ijp.6696

Original languageEnglish (US)
Pages (from-to)527-535
Number of pages9
JournalInternational Journal of Prosthodontics
Issue number5
StatePublished - Sep 23 2020


  • Cementation
  • Computer-Aided Design
  • Crowns
  • Dental Abutments
  • Dental Stress Analysis
  • Materials Testing
  • Resin Cements
  • Titanium
  • Zirconium

ASJC Scopus subject areas

  • Oral Surgery


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