Scanning electron microscopy assessment of the load-bearing capacity of cad/cam-fabricated molar crowns
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.
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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