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Scientific article
English

Comparative in vitro wear resistance of CAD/CAM composite resin and ceramic materials

Published inThe journal of prosthetic dentistry, vol. 115, no. 2, p. 199-202
Publication date2016-02
First online date2015-10-14
Abstract

Composite resin is a promising option in computer-aided design and computer-aided manufacturing (CAD/CAM) dentistry; however, the wear resistance of composite resin remains a primary concern.

The purpose of this in vitro study was to evaluate the wear resistance of 5 CAD/CAM materials (n=10), consisting of 4 composite resins (3M Lava Ultimate, Kerr experimental composite resin material, Vita Enamic, 3M Paradigm MZ100) and 1 ceramic (Vita Mark II) in contact with natural human enamel cusps.

Specimens were loaded into a computer-controlled mastication simulator and subjected to 200000 mechanical cycles (49 N) against natural human enamel simultaneously with 500 thermal cycles (5°C to 50°C to 5°C). The wear resistance was analyzed by measuring the vertical substance loss (the maximum depth of the worn area) in the contact point area of the specimen. The worn surfaces were observed by scanning electron microscopy to determine the wear patterns.

Vita Mark II exhibited the best wear resistance among the tested materials, followed by 3M Lava Ultimate, Vita Enamic, and 3M Paradigm MZ100. The Kerr experimental material exhibited the lowest wear resistance, yet its results were not significantly different from those of the 3 other composite resin blocks (P>.05).

Within the limitations of this in vitro study, the wear resistance of composite resin blocks in contact with enamel cusps was significantly lower than that of a ceramic block.

eng
Keywords
  • Ceramics
  • Composite Resins / chemistry
  • Computer-Aided Design
  • Dental Enamel
  • Dental Porcelain / chemistry
  • Humans
  • In Vitro Techniques
  • Materials Testing
  • Surface Properties
Citation (ISO format)
ZHI, Li, BORTOLOTTO IBARRA, Tissiana, KREJCI, Ivo. Comparative in vitro wear resistance of CAD/CAM composite resin and ceramic materials. In: The journal of prosthetic dentistry, 2016, vol. 115, n° 2, p. 199–202. doi: 10.1016/j.prosdent.2015.07.011
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Identifiers
ISSN of the journal0022-3913
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