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Impact of air‐abrasion on fracture load and failure type of veneered anterior Y‐TZP crowns before and after chewing simulation
Author(s) -
Stawarczyk Bogna,
Özcan Mutlu,
Hallmann Lubica,
Roos Malgorzata,
Trottmann Albert,
Hämmerle Christoph H. F.
Publication year - 2012
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32737
Subject(s) - weibull modulus , materials science , cementation (geology) , weibull distribution , fracture (geology) , cubic zirconia , dentistry , abrasion (mechanical) , composite material , dental porcelain , ceramic , mathematics , medicine , statistics , cement
The purpose of this study was to determine the fracture load and failure types of veneered zirconia crowns that were air‐abraded on either the veneering or cementation surface. Fracture loads were determined before and after chewing simulation. Standardized Y‐TZP frameworks ( n = 360) for canines were fabricated and divided into one control group ( n = 72) and 12 test groups ( n = 24). The test groups were air‐abraded using alumina powder (10 s, 2 bar, distance: 10 mm) with particle size of 50 μm resp. 110 μm and veneered with one of the veneering ceramics: Triceram, Zirox, or VITA VM9. The crowns were cemented on their corresponding CoCr abutment. The initial fracture load was measured in one half of each group ( n = 12), and the other half ( n = 12) was subjected to chewing cycling. The data were analyzed using three‐way and one‐way ANOVA, a post‐hoc Scheffé test, two sample Student's t ‐test, and Weibull statistics ( p < 0.05). Thus, nonaged, air‐abraded groups of two veneering ceramics (Triceram, VITA VM9) showed higher mean fracture load compared to control groups. After chewing simulation, air‐abraded groups showed lower mean fracture load compared to control groups. Aging decreased the Weibull modulus of all tested groups, and air‐abraded groups showed lower Weibull moduli compared to control groups. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 100B: 1683–1690, 2012.