Merck

Reliability and failure modes of two Y-TZP abutment designs.

The International journal of prosthodontics (2015-01-15)
Miltiadis E Mitsias, Van P Thompson, Mitchel Pines, Nelson R F A Silva
ABSTRACT

Fracture strength and accelerated fatigue reliability of two zirconia abutment systems were tested. Thirty-six implants with a Morse taper (MT; n = 18) or cone (C; n = 18) design were restored with metallic crowns. Loads were applied as single load to failure (SLF) or mouth-motion cycles using a step-stress accelerated life testing (SALT) method. SLF mean values were 690 ± 430 N and 209 ± 25 for MT and C groups, respectively. In terms of the SALT results, 8 specimens survived (50,000 cycles) and 7 failed (maximum load 400 N) in the MT group; whereas for the C group all abutments failed before the maximum number of cycles. Failure mode was fracture of the Y-TZP abutments for both groups. Higher reliability for a mission of 50,000 cycles at 175 N for MT versus C designs was determined, and significant differences in fracture modes were observed.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Zirconium, sponge, ≥99% trace metals basis
Sigma-Aldrich
Yttrium, chips, 99.9% trace rare earth metals basis
Sigma-Aldrich
Zirconium, foil, thickness 0.1 mm, 99.98% trace metals basis
Sigma-Aldrich
Zirconium, rod, diam. 6.35 mm, ≥99% trace metals basis
Sigma-Aldrich
Zirconium, powder, −100 mesh
Sigma-Aldrich
Yttrium, powder, −40 mesh, 99.5% trace rare earth metals basis
Sigma-Aldrich
Yttrium, ingot, 99.9% trace rare earth metals basis
Yttrium, rod, 50mm, diameter 2.0mm, cast, 99%
Zirconium, rod, 100mm, diameter 19.0mm, centerless ground, 99.2%
Zirconium, rod, 1000mm, diameter 2.0mm, centerless ground, 99.2%
Zirconium, wire reel, 10m, diameter 0.28mm, annealed, 99.2%
Zirconium, rod, 500mm, diameter 3.0mm, centerless ground, 99.2%
Zirconium, rod, 1000mm, diameter 3.0mm, centerless ground, 99.2%
Zirconium, wire reel, 10m, diameter 0.5mm, as drawn, 99.2%
Zirconium, tube, 100mm, outside diameter 12.7mm, inside diameter 9.5mm, wall thickness 1.6mm, annealed, 99.2%
Zirconium, wire reel, 20m, diameter 0.28mm, annealed, 99.2%
Zirconium, rod, 1000mm, diameter 9.5mm, centerless ground, 99.2%
Zirconium, tube, 500mm, outside diameter 6.35mm, inside diameter 4.55mm, wall thickness 0.9mm, annealed, 99.2%
Zirconium, tube, 1000mm, outside diameter 12.7mm, inside diameter 9.5mm, wall thickness 1.6mm, annealed, 99.2%
Zirconium, rod, 200mm, diameter 2.0mm, centerless ground, 99.2%
Zirconium, wire reel, 20m, diameter 0.5mm, as drawn, 99.2%
Zirconium, wire reel, 2m, diameter 0.05mm, as drawn, 99.2%
Zirconium, sponge, 100g, max. size 25mm, 99.2%
Zirconium, wire reel, 0.5m, diameter 0.05mm, as drawn, 99.2%
Zirconium, rod, 200mm, diameter 19.0mm, centerless ground, 99.2%
Zirconium, rod, 200mm, diameter 3.0mm, centerless ground, 99.2%
Zirconium, rod, 500mm, diameter 9.5mm, centerless ground, 99.2%
Zirconium, rod, 100mm, diameter 3.0mm, centerless ground, 99.2%
Zirconium, tube, 500mm, outside diameter 12.7mm, inside diameter 9.5mm, wall thickness 1.6mm, annealed, 99.2%
Zirconium, rod, 100mm, diameter 50mm, centerless ground, 99.2%