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- Title
CAD/CAM Materials for Endocrown Restorations: Evaluation of Microhardness, Flexural Strength, and Surface Characterization.
- Authors
Martins Raimundo, Ágatha Christie; Luiz Silva, Clarisse Maria; da Silva Souza, Taynara Franciele; Tôrres Neto, Antonio José; Vieira Grangeiro, Manassés Tércio; Gonçalves de Figueiredo, Viviane Maria
- Abstract
Endocrowns have emerged as a promising option for restoring endodontically treated teeth, offeringa restorable fracture scenario. However, regarding the choice of material and its fracture resistance, there are gaps in the literature regarding the best indication. The objective of this research was to evaluate and compare the effect of restorative materials for CAD-CAM in the manufacture of endocrown restorations, through an in Vitro study on hardness and fracture resistance. For the study, CAD-CAM blocks were transformed into discs 12 mm in diameter and 1.2 mm thick (specimens). Three restorative materials were evaluated and distributed into experimental groups (N=12 specimens): Leucita-Reinforced Ceramic/IPS Empress CAD (MRleu), Lithium Disilicate/IPS Emax CAD (MRdis) and Nanoceramic Resin/Lava Ultimate (MRres). These restorative materials were evaluated for morphology (N=1) by Scanning Electron Microscopy (SEM) and surface chemistry (N=1) by dispersive energy spectroscopy (EDS). The specimens were evaluated when the Vikers micro hardness (N=1) with a load of 1kg and 10 indentations, as well as the resistance to biaxial flexion (N=10) at a test speed of 0.5 mm/min. After the fracture occurred, the fragments were examined under a stereomicroscope. The results were tabulated and analyzed using the Minitab statistical program. The results showed that the MRdis material demonstrated superior results in relation to hardness (P=0.000) and biaxial bending resistance (P=0.000), followed by MRleu andfinally the MRres. The presence of inorganic particles on an organic matrix and the presence of Zirconium (Zr) stands out in Lava Ultimate. It was concluded that restorative materials for CAD-CAM in the manufacture of Endocrowns restorations have a significant effect on hardness and mechanical strength.
- Subjects
ENDODONTICS; MATERIALS testing; IN vitro studies; COMPUTER-aided design; SURFACE properties; DENTAL materials; SYNTHETIC gums &; resins; DENTAL crowns; DENTAL metallurgy; SILICATES; LITHIUM; TENSILE strength; PHYSIOLOGIC strain; SCANNING electron microscopy; SPECTRUM analysis; TOOTH fractures; DATA analysis software
- Publication
Journal of Health Sciences (2447-8938), 2024, Vol 26, Issue 1, p9
- ISSN
2447-8938
- Publication type
Article
- DOI
10.17921/2447-8938.2024v26n1p09-16