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

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

锆, powder, −100 mesh

Sigma-Aldrich

锆, foil, thickness 0.1 mm, 99.98% trace metals basis

Sigma-Aldrich

锆, sponge, ≥99% trace metals basis

Sigma-Aldrich

钇, chips, 99.9% trace rare earth metals basis

Sigma-Aldrich

锆, rod, diam. 6.35 mm, ≥99% trace metals basis

锆, rod, 100mm, diameter 50mm, centerless ground, 99.2%

Sigma-Aldrich

锆, powder, in water, -325 mesh, 99.5% trace metals basis (excluding Hf)

锆, wire reel, 10m, diameter 0.28mm, annealed, 99.2%

Sigma-Aldrich

钇, diam. × thickness 2.00 in. × 0.25 in., 99.9% trace metals basis

锆, rod, 100mm, diameter 1.5mm, 99.2%

锆, sponge, 100g, max. size 25mm, 99.2%

锆, sponge, 500g, max. size 25mm, 99.2%

锆, foil, light tested, 25x25mm, thickness 0.01mm, 99.2%

钇, wire reel, 0.05m, diameter 1.0mm, 99.9%

锆, rod, 500mm, diameter 1.5mm, 99.2%

锆, sponge, 200g, max. size 25mm, 99.2%

锆, foil, 100x100mm, thickness 0.1mm, annealed, 99.2%

锆, rod, 1000mm, diameter 5.0mm, centerless ground, 99.2%

锆, wire reel, 5m, diameter 0.28mm, annealed, 99.2%

锆, foil, 0.5m coil, thickness 0.075mm, annealed, 99.2%

锆, foil, light tested, 25x25mm, thickness 0.02mm, 99.2%

锆, rod, 100mm, diameter 9.5mm, centerless ground, 99.2%

锆, tube, 100mm, outside diameter 6.35mm, inside diameter 4.55mm, wall thickness 0.9mm, annealed, 99.2%

锆, foil, 25x25mm, thickness 0.25mm, annealed, 99.2%

锆, foil, 0.5m coil, thickness 0.1mm, annealed, 99.2%

钇, foil, 25x25mm, thickness 0.15mm, as rolled, 99%

锆, foil, not light tested, 150x150mm, thickness 0.009mm, 99.2%

锆, rod, 1000mm, diameter 1.5mm, 99.2%

锆, rod, 500mm, diameter 2.0mm, centerless ground, 99.2%

锆, foil, 200x300mm, thickness 0.1mm, annealed, 99.2%