Tensile fatigue of 4-META cement bonding three base metal alloys to enamel and comparison to other resin cements

Academic Article

Abstract

  • The tensile median fatigue limits and fracture mode of 4-META cement wereevaluated after bonding Ni-Cr, Ni-Cr-Be, and Co-Cr alloys to enamel. Alloy surfaces, 6 mm in diameter, were grit blasted with 50 μm Al2O3 and cemented to etched bovine enamel under a 2 kg load. Samples were cycled in tension to failure or 106 cycles at 5 Hz in Ringer's solution at 37°C. Two-point strategy was used to determine median fatigue limits (Ŝ50). Fracture modes were evaluated by SEM on samples failing before 106 cycles. Results indicated differences between all sample groups where Ŝ50 (Ni-Cr-Be)>Ŝ50 (Co-Cr)>Ŝ50 (Ni-Cr). Failure analysis revealed mixed cohesive fractures near both interfaces with small areas of delamination within the cement. Comparison to reported median fatigue limits of two commercially available cements were discussed. © 1995 The Editorial Council of The Journal of Prosthetic Dentistry.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Lang BR; Givan DA; Fitchie JG; Anderson L; Zardiackas LD
  • Start Page

  • 377
  • End Page

  • 385
  • Volume

  • 73
  • Issue

  • 4