Fatigue failure mode of porcelain veneers with different preparation designs

Zlatanovska, Katerina and Longurova, Natasa and Zarkova-Atanasova, Julija and Proseva, Ljubica and Kovacevska, Ivona (2022) Fatigue failure mode of porcelain veneers with different preparation designs. In: Конгрес на македонско стоматолошко друштво со меѓународно учество (МСД) - Стоматологијата пред предизвиците на новото време: можности и ограничувања, 15-18 Sept 2022, Ohrid. (In Press)

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Abstract

Introduction: Due to high aesthetic qualities, proven biocompatibility and prognosis for long term durability, porcelain veneers have become a routine restorative procedure for treatment of frontal teeth. The aim of this in vitro study was to examine the influence of the preparation designs on the fatigue failure of porcelain veneers.
Materials and method: In this in vitro study porcelain veneers with three different types of preparation design – feather, bevel and incisal overlap – palatal chamfer were analyzed. The veneers were made on maxillary central incisor by refractory die technique. The samples from all three groups were loaded to failure in a testing machine TRITECH WF 10056. The force was applied at angle of 45° to the long axis of the tooth, with constant speed of 0,5 mm/min. The mode of failure was determined as debonding or fracture. The data were statistically analyzed using statistical program Statistica 7.1; SPSS17.0.
Results: In feather preparation as a consequence of mechanical strength, fracture is registered in 20.0% of samples and debonding at 80.0%. In bevel preparation fracture is register in 93.3% and debonding in 6.7%. In incisal overlap – palatal chamfer due to mechanical strength is registered fracture in 96.7% and debonding in 3.3%. The percentage difference between the registered mode of failure – fracture against debonding between the groups according to Difference test was statistically significant between group I against group II, and I against III group, for p<0.05 (p=0.0438).
Conclusion: The most common fatigue failure in porcelain veneers with feather preparation is debonding, while in other preparation designs fracture dominates.
Key words: fatigue failure, fracture resistance, porcelain veneers, preparation designs.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Medical and Health Sciences > Clinical medicine Medical and Health Sciences > Health sciences
Divisions:	Faculty of Medical Science
Depositing User:	Katerina Zlatanovska
Date Deposited:	13 Oct 2022 09:24
Last Modified:	13 Oct 2022 09:24
URI:	https://eprints.ugd.edu.mk/id/eprint/30199

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