Dental and Medical Problems

Dent Med Probl
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ISSN 1644-387X (print)
ISSN 2300-9020 (online)
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Dental and Medical Problems

2020, vol. 57, nr 3, July-September, p. 261–267

doi: 10.17219/dmp/118642

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Effect of artificial saliva on the mechanical properties of a polymer material reinforced with fiber, used in esthetic tooth restorations

Wpływ sztucznej śliny na właściwości mechaniczne materiału polimerowego wzmocnionego włóknem, stosowanego w estetycznych rekonstrukcjach zębów

Rafał Brożek1,A,B,C,D, Krzysztof Pałka2,B, Ryszard Koczorowski1,A,E, Barbara Dorocka-Bobkowska1,F

1 Department of Gerodontology and Oral Pathology, Poznan University of Medical Sciences, Poland

2 Mechanical Engineering Faculty, Lublin University of Technology, Poland

Abstract

Background. The oral environment can negatively affect the physical properties of fiber-reinforced composite (FRC) materials, which can lead to the deterioration of mechanical stability and reduce the span of their clinical usefulness.
Objectives. The aim of this study was to determine the influence of artificial saliva on the selected mechanical properties of FRC.
Material and Methods. The core of the polymer material selected for the study was a bundle of ultrahighmolecular-weight polyethylene (UHMWPE) fibers. Fourteen samples were stored in an incubator at 37°C, in 20 mL of artificial saliva solution, and weighed on days 1 and 28. At the same time, mechanical tests were performed, including the measurements of Young’s modulus, tensile stress, maximum tensile force, and tensile deformation.
Results. The analysis of basic statistics together with the results of the Shapiro–Wilk test and the distribution of Spearman’s rho coefficient showed a strong negative relationship between the pair of variables – tensile deformation and the sorption of synthetic saliva. The results related to Young’s modulus of elasticity and tensile stress were not statistically significant.
Conclusion. Water penetration into the space between the fibers does not adversely affect the mechanical properties of the material tested. In the static tensile test, high and desired mechanical strength was observed, which may justify the effective use of this type of material in clinical practice and may be a good alternative to prosthetic restorations, whose retention is obtained only through a mechanical connection with the abutment tooth.

Key words

absorption, artificial saliva, mechanical stresses, composite materials

Słowa kluczowe

absorpcja, sztuczna ślina, naprężenia mechaniczne, materiały kompozytowe

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