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
摘要

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.

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锆, powder, −100 mesh
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钇, powder, −40 mesh, 99.5% trace rare earth metals basis
Sigma-Aldrich
锆, foil, thickness 0.1 mm, 99.98% trace metals basis
Sigma-Aldrich
钇, chips, 99.9% trace rare earth metals basis
Sigma-Aldrich
锆, sponge, ≥99% trace 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)
钇, foil, 50x50mm, thickness 0.125mm, as rolled, 99%
钇, rod, 100mm, diameter 6.35mm, cast, 99%
钇, rod, 50mm, diameter 12.5mm, cast, 99%
钇, rod, 50mm, diameter 2.0mm, cast, 99%
钇, rod, 50mm, diameter 6.35mm, cast, 99%
钇, wire reel, 0.05m, diameter 0.5mm, 99.9%
钇, wire reel, 0.05m, diameter 1.0mm, 99.9%
钇, wire reel, 0.05m, diameter 1.0mm, square section, 99.9%
钇, wire reel, 0.1m, diameter 0.5mm, 99.9%
钇, wire reel, 0.1m, diameter 1.0mm, 99.9%
钇, wire reel, 0.2m, diameter 0.5mm, 99.9%
钇, wire reel, 0.2m, diameter 1.0mm, 99.9%
锆, foil, not light tested, 50x50mm, thickness 0.006mm, 99.2%
锆, rod, 1000mm, diameter 1.5mm, 99.2%
锆, rod, 1000mm, diameter 12.7mm, centerless ground, 99.2%
锆, rod, 1000mm, diameter 2.0mm, centerless ground, 99.2%
锆, rod, 1000mm, diameter 3.0mm, centerless ground, 99.2%
锆, rod, 1000mm, diameter 5.0mm, centerless ground, 99.2%
锆, rod, 1000mm, diameter 6.0mm, centerless ground, 99.2%
锆, rod, 1000mm, diameter 9.5mm, centerless ground, 99.2%
锆, rod, 100mm, diameter 1.5mm, 99.2%
锆, rod, 100mm, diameter 12.7mm, centerless ground, 99.2%

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