The Effect of Cement Type on the Retention of Polymer Infiltrated Ceramic Network Restorations to Prefabricated Titanium Alloy Abutments
Abstract
Introduction: Polymer-infiltrated ceramic network (PICN) is a recently introduced material that shows promise to overcome some limitations of traditional ceramics, particularly for implant restorations. The attachment of the titanium abutment to the overlying restoration is typically accomplished through the use of an adhesive cement. Purpose: To examine the tensile bond strength of three cements on the PICN abutment block to an idealized machined prefabricated titanium base abutment. Methods: 30 unmilled PICN implant abutment blocks were cemented to 30 micro-abraded prefabricated titanium stock implant abutments using 3 resin cements (10 samples for each cement): dual cured self-adhesive cement (Rely-X Unicem 2), dual-cured adhesive cement (Multilink Automix), and self-cured adhesive cement (Panavia 21). After artificial aging with 36,500 thermocycles, the peak failure load was measured using a crown pull-off test. Material fracture patterns and failure modes were examined. Statistical analyses were performed using a Kruskal-Wallis test and Dunn Test. Results: The median retention values were 358N for Multilink Automix, 547N for Panavia 21, and 738N for Rely-X Unicem. A significant difference of values between Rely-X Unicem and Multilink Automix was found. There were no significant differences between the other cement types. Failure between Multilink Automix and Panavia 21 occurred primarily at the PICN-cement interface, whereas failure in the Rely-X Unicem group was seen at the titanium-cement interface. For Rely-X Unicem alone, the bond to PICN was greater than that to the micro-abraded titanium alloy. Conclusions: Rely-X Unicem dual cured self-adhesive resin cement displayed the highest bond strength of the tested cements to the PICN material. However, all 3 testedresin cements displayed acceptable retention values between PICN and titanium alloy abutments required for typical clinical conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2019
- Accession Number
- AD1127774
Entities
People
- Richard D. Iii Bartol