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Article

Mechanical Behavior of Alkasite Posterior Restorations in Comparison to Polymeric Materials: A 3D-FEA Study

1
School of Dentistry, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
2
Academic Centre for Dentistry Amsterdam (ACTA), Department of Dental Materials, University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
3
Department of Bioscience Research, College of Dentistry—University of Tennessee Health Science Center, Memphis, TN 38163, USA
4
Department of Oral and Maxillofacial Sciences, La Sapienza University of Rome, 00161 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Haw-Ming Huang
Polymers 2022, 14(8), 1502; https://doi.org/10.3390/polym14081502
Received: 14 March 2022 / Revised: 31 March 2022 / Accepted: 5 April 2022 / Published: 7 April 2022
(This article belongs to the Special Issue Polymers Strategies in Dental Therapy)
The present investigation evaluated the effect of the combination of different dental filling materials in Class I cavities under occlusal loading using three-dimensional finite elements analysis (FEA). Six computer-generated and restored models of a lower molar were created in the CAD software and compared according to the biomechanical response during chewing load condition. Two adhesively bonded bulk restorative materials [bulk-fill resin composite (BF) or Alkasite (Alk)] were evaluated with or without the presence of a base material below (flowable resin composite or glass ionomer cement). A food bolus was placed on the occlusal surface mimicking the compressive occlusal load (600 N) during the static linear analysis. The maximum principal stress (tensile) was calculated as stress criteria in enamel, dentin and restoration. All models showed high stresses along the enamel/restoration margin with a similar stress trend for models restored with the same upper-layer material. Stress values up to 12.04 MPa (Alk) or up to 11.12 MPa (BF) were recorded at the enamel margins. The use of flexible polymeric or ionic base material in combination with bulk-fill resin composite or Alk did not reduce the stress magnitude in dentine and enamel. Class I cavities adhesively restored with bulk-fill resin composite showed lighter stress concentration as well as Alk. Therefore, adhesively bonded Alk restoration showed a promising mechanical behavior when used with different base materials or as a bulk restoration for posterior Class I cavity. View Full-Text
Keywords: dental restoration failure; resin composite; finite element analysis; dental materials dental restoration failure; resin composite; finite element analysis; dental materials
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MDPI and ACS Style

Ausiello, P.; Dal Piva, A.M.d.O.; di Lauro, A.E.; Garcia-Godoy, F.; Testarelli, L.; Tribst, J.P.M. Mechanical Behavior of Alkasite Posterior Restorations in Comparison to Polymeric Materials: A 3D-FEA Study. Polymers 2022, 14, 1502. https://doi.org/10.3390/polym14081502

AMA Style

Ausiello P, Dal Piva AMdO, di Lauro AE, Garcia-Godoy F, Testarelli L, Tribst JPM. Mechanical Behavior of Alkasite Posterior Restorations in Comparison to Polymeric Materials: A 3D-FEA Study. Polymers. 2022; 14(8):1502. https://doi.org/10.3390/polym14081502

Chicago/Turabian Style

Ausiello, Pietro, Amanda Maria de Oliveira Dal Piva, Alessandro Espedito di Lauro, Franklin Garcia-Godoy, Luca Testarelli, and João Paulo Mendes Tribst. 2022. "Mechanical Behavior of Alkasite Posterior Restorations in Comparison to Polymeric Materials: A 3D-FEA Study" Polymers 14, no. 8: 1502. https://doi.org/10.3390/polym14081502

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