To evaluate the tensile bond strength of zirconia primer on the retention of zirconium oxide ceramic crowns - An in vitrostudy

Rani, Shraddha; Shankar, Mahadevan Shiva; Jacob, P. C.; Rai, Nitesh; Jagadeesh, KN

doi:10.4103/0976-6944.171077

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“…The effective zirconia bonding was thought to be due to the good chemical interaction between the 6-MHPA or 6-MHPP (- P(=O)(OH)2) phosphonic acid group and metal oxides on the zirconia surface. [ 17 ] Sato[ 18 ] found that commercial metal primers (AZ Primer, Shofu), containing the 6-MHPA monomer of phosphonic acid, were successful in maintaining a strong bond between dual-curing luting cement, ResiCem (Shofu), and all-ceramic prostheses based on alumina and zirconia. [ 19 ]…”

Section: Discussionmentioning

confidence: 99%

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Comparison of the bond strength of composite resin to zirconia and composite resin to polyether ether ketone: An in vitro study

et al. 2020

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A BSTRACT Aim: The aim of the study was to compare the shear bond strength of composite resin bonded to polyether ether ketone (PEEK) and zirconia, and also to evaluate the effect of thermocycling on the shear bond strength. Materials and Methods: A total of 22 zirconia (Group 1) and 22 PEEK (Group 2) specimens (disks of 10 mm in diameter and 10 mm in thickness) were machine milled using computer-aided design (CAD)/computer-aided manufacturing (CAM) from commercially available zirconia and PEEK. These specimens were air abraded with 110-μm aluminum oxide. Following which these two groups were subdivided into four groups, that is, Group 1A: 11 zirconia specimens before thermocycling, Group 1B: 11 zirconia specimens after thermocycling, Group 2A: 11 PEEK specimens before thermocycling, and Group 2B: 11 PEEK specimens after thermocycling. These four groups of specimens were embedded in an acrylic block, and bonding agent was applied over the upper surfaces of the disks of each of these specimens. Composite resin was then cured, and then Group 1B and group 2B were thermocycled under a standard temperature. The bond strength of the specimen was tested using universal testing machine. Result: The result showed that there was no significant difference in shear bond strength between the groups, although higher shear bond strength was observed in the PEEK group. Conclusion: Shear bond strength of PEEK is similar to zirconia. The results suggest that the pretreatment method and primers used were effective in improving the bonding of resin cements to zirconia ceramic and the bonding properties of the veneering resin to the PEEK surface.

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Section: Discussionmentioning

confidence: 99%

“…In addition, the phosphonate monomers of the primer can develop a bond with the oxides in the substrate and have resin terminal end groups, which can enable cohesive bonding. [ 17 ]…”

Section: Discussionmentioning

confidence: 99%