Mohammed Hamed  Ghazy,Shaban Mohammed Takerza,Shaimaa Ahmed Abo-Elfarag,
Influence of Luting Material types on the Microleakage and Retention of Pressable Ceramic Crowns Cemented to Zirconia Implant Abutments
Dental Oral Biology and Craniofacial Research
2018
2613-4950
http://dx.doi.org/10.31487/j.DOCR.2018.10.005
https://www.sciencerepository.org/influence-of-luting-material-types-on-the-microleakage-and-retention-of-pressable-ceramic-crowns-cemented-to-zirconia-implant-abutments_DOCR-1-105 
Abstract: Objective: To compare microleakage and retention of all-ceramic crowns cemented to zirconia implant
abutments using three different luting agents.
Material and Methods: 42 internal hex zirconia abutments were assembled on 42 Implant Directs Legacy
then lithium disilicate ceramic crowns with overhanging margins were fabricated and cemented to their
corresponding assembly. All specimens were stored in water at 37°C for 24 hours then subjected to 3500
thermocycling. The all-ceramic crowns were pulled off to accomplish the retention test. The microleakage
between all crowns and zirconia abutments was measured after immersed in 2% basic red fuchsine dye then
were assessed using binocular stereomicroscope at each margin.
Results: Descriptive statistics showed that the highest mean value retentive strength of Rely-x cement
(383.44±19.69 N), then Ketac-Cem (130.57±9.37N) and lowest mean value of Temp-Bond luting cement
was (74.67±9.57 N). Rely-x demonstrated the least microleakage while Tembond was the worst
microleakage value.
Conclusion: Resin modified glass ionomer Rely-x demonstrated the highest mean retentive strength. Resin
modified glass ionomer Rely-x had the best sealing properties. The temporary cements Tempbond NE
showed more microleakage than those Rely-x and Ketac-Cem. 
Keywords: Zirconia, Rely-x, Ketac-Cem