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Scanning electron microscopy assessment of the load-bearing capacity of cad/cam-fabricated molar crowns
Basaran, Emine Göncü; Aktas, Güliz; Vallittu, Pekka; Lassila, Lippo; Tuncer, Mehmet Cudi.
  • Basaran, Emine Göncü; University of Dicle. Faculty of Dentistry. Department of Prosthetic Dentistry. Diyarbakir. TR
  • Aktas, Güliz; University of Hacettepe. Faculty of Dentistry. Department of Prosthetic Dentistry. Ankara. TR
  • Vallittu, Pekka; University of Turku. Institute of Dentistry. Department of Biomaterials Science. Turku. FI
  • Lassila, Lippo; University of Turku. Institute of Dentistry. Department of Biomaterials Science. Turku. FI
  • Tuncer, Mehmet Cudi; Dicle University. Faculty of Medical Science. Department of Anatomy. Diyarbakir. TR
Braz. oral res. (Online) ; 34: e035, 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1100934
ABSTRACT
Abstract Although fiber-reinforced composites are commonly used in dental practice, whether fiber-reinforced crowns and fixed partial dentures can be used as definitive prostheses remains to be determined. This study used scanning electron microscopy to evaluate the load-bearing capacity of non-reinforced and fiber-reinforced composite (FRC) molar crowns prepared by computer-aided design/computer-aided manufacturing (CAD/CAM). The crowns were fabricated from three empirical FRC blocks, one empirical composite block, and one commercial ceramic block. The FRC resin was prepared by mixing BaO silicate particles, E-glass fiber, and dimethacrylate resin. Specimens were divided into five groups (n = 10), differing in the amounts of filler, resin, and fiber. Crowns were statically loaded until fracture. One-way analysis of variance and Tukey's post hoc multiple comparison tests were used for statistical analyses. The groups showed significant differences in load-bearing capacity; empirical bidirectional FRC resin blocks had the highest capacity, while commercial ceramic blocks had the lowest capacity. Molar crowns formed from FRC resin blocks had higher load-bearing capacity compared to non-reinforced composite resin and ceramic blocks. These results show that fiber reinforcement increased the load-bearing capacity of molar crowns.
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Full text: Available Index: LILACS (Americas) Main subject: Weight-Bearing / Computer-Aided Design / Composite Resins / Crowns Limits: Humans Language: English Journal: Braz. oral res. (Online) Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Finland / Turkey Institution/Affiliation country: Dicle University/TR / University of Dicle/TR / University of Hacettepe/TR / University of Turku/FI

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Full text: Available Index: LILACS (Americas) Main subject: Weight-Bearing / Computer-Aided Design / Composite Resins / Crowns Limits: Humans Language: English Journal: Braz. oral res. (Online) Journal subject: Dentistry Year: 2020 Type: Article Affiliation country: Finland / Turkey Institution/Affiliation country: Dicle University/TR / University of Dicle/TR / University of Hacettepe/TR / University of Turku/FI