Retention of zirconia crowns to ti-base abutments: Effect of luting protocol, abutment treatment and autoclave sterilization

Edmara T.P. Bergamo, Abbas Zahoui, Larissa Luri Amorin Ikejiri, Manoela Marun, Kimberly Peixoto da Silva, Paulo G. Coelho, Simone Soares, Estevam A. Bonfante

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To evaluate the influence of resin cement type, surface pretreatment and autoclave sterilization on the retention of Y-TZP crowns to Ti-base abutments. Methods: Y-TZP crowns were designed and milled to fit Ti-base abutments. Crowns were cemented using either a conventional resin cement (conventional) with a universal adhesive or a self-adhesive resin cement (self-adhesive), both following no surface pretreatment (No) or Ti-base abutment sandblasting (SB) (n=20/group). Half of the cemented samples were subjected to in-office autoclave sterilization. Pullout testing was performed in a universal testing machine at a speed of 1 mm/min until crown displacement. Data were statistically evaluated through a linear mixed model following post hoc comparisons by LSD test. Results: Pullout data as a function of cement type demonstrated higher retention for conventional relative to self-adhesive cement (p<0.001). Ti-base sandblasting (SB) favored crown retentiveness over No pretreatment (p<0.001). Sterilized crowns exhibited higher pullout values than non-sterile (p=0.036). All the two-and three-factor interaction analyses corroborated with the superior adhesive strength of conventional compared to self-adhesive cement (all, p<0.011), as well as, SB relative to No pretreatment (all, p<0.024). While autoclave sterilization maximized bond strength when self-adhesive cement (data collapsed over surface pretreatment, p<0.050) and No pretreatment were evaluated (data collapsed over surface pretreatment, p<0.013), no significant difference was observed for conventional resin cement (p=0.280) and SB (p=0.878) groups. Conclusions: Conventional resin cement and/or Ti-base sandblasting increased Y-TZP crown retentiveness, with no significant influence of autoclave sterilization. Autoclaving increased retentiveness when self-adhesive cement and/or no Ti-base pretreatment were used.

Original languageEnglish (US)
Pages (from-to)171-175
Number of pages5
JournalJournal of Prosthodontic Research
Volume65
Issue number2
DOIs
StatePublished - 2021

Keywords

  • Dental implants
  • Dental prosthesis
  • Dental prosthesis Retention
  • Resin cement
  • Sterilization

ASJC Scopus subject areas

  • Oral Surgery
  • Dentistry (miscellaneous)

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