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Materials 2018, 11(4), 504; https://doi.org/10.3390/ma11040504

Mechanical and Thermal Properties of Dental Composites Cured with CAD/CAM Assisted Solid-State Laser

1
Institute of Polymers, Composites and Biomaterials—National Research Council of Italy, V.le J.F. Kennedy 54—Mostra d’Oltremare Pad. 20, 80125 Naples, Italy
2
Department of Industrial Engineering, Fraunhofer JL IDEAS—University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
3
Department of Industrial and Information Engineering, University of Campania “Luigi Vanvitelli”, via Roma 29, 81031 Aversa, Italy
4
Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Via Pansini, 5, 80125 Naples, Italy
*
Author to whom correspondence should be addressed.
Received: 18 February 2018 / Revised: 16 March 2018 / Accepted: 23 March 2018 / Published: 27 March 2018
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Abstract

Over the last three decades, it has been frequently reported that the properties of dental restorative composites cured with argon laser are similar or superior to those achieved with conventional halogen and light emitting diode (LED) curing units. Whereas laser curing is not dependent on the distance between the curing unit and the material, such distance represents a drawback for conventional curing units. However, a widespread clinical application of this kind of laser remains difficult due to cost, heavy weight, and bulky size. Recently, with regard to the radiation in the blue region of the spectrum, powerful solid-state lasers have been commercialized. In the current research, CAD (computer-aided design)/CAM (computer-aided manufacturing) assisted solid-state lasers were employed for curing of different dental restorative composites consisting of micro- and nanoparticle-reinforced materials based on acrylic resins. Commercial LED curing units were used as a control. Temperature rise during the photopolymerisation process and bending properties were measured. By providing similar light energy dose, no significant difference in temperature rise was observed when the two light sources provided similar intensity. In addition, after 7 days since curing, bending properties of composites cured with laser and LED were similar. The results suggested that this kind of laser would be suitable for curing dental composites, and the curing process does not suffer from the tip-to-tooth distance. View Full-Text
Keywords: computer-aided design/computer-aided systems; dental materials; composites; mechanical properties; thermal properties; laser computer-aided design/computer-aided systems; dental materials; composites; mechanical properties; thermal properties; laser
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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De Santis, R.; Gloria, A.; Maietta, S.; Martorelli, M.; De Luca, A.; Spagnuolo, G.; Riccitiello, F.; Rengo, S. Mechanical and Thermal Properties of Dental Composites Cured with CAD/CAM Assisted Solid-State Laser. Materials 2018, 11, 504.

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