Preprint Short Note Version 1 Preserved in Portico This version is not peer-reviewed

Di-Silicate Dental Ceramic Surface Preparation by 1070 nm Fiber Laser: Thermal and Ultrastructural Analysis

Carlo Fornaini
* ORCID logo ,
Federica Poli
,
Elisabetta Merigo
ORCID logo ,
Nathalie Brulat-Bouchard
,
Ahmed El Gamal
,
Jean-Paul Rocca
,
Stefano Selleri
ORCID logo ,
Annamaria Cucinotta
Version 1 : Received: 4 November 2017 / Approved: 5 November 2017 / Online: 5 November 2017 (11:47:29 CET)

A peer-reviewed article of this Preprint also exists.

Fornaini, C.; Poli, F.; Merigo, E.; Brulat-Bouchard, N.; El Gamal, A.; Rocca, J.-P.; Selleri, S.; Cucinotta, A. Disilicate Dental Ceramic Surface Preparation by 1070 nm Fiber Laser: Thermal and Ultrastructural Analysis. Bioengineering 2018, 5, 10. Fornaini, C.; Poli, F.; Merigo, E.; Brulat-Bouchard, N.; El Gamal, A.; Rocca, J.-P.; Selleri, S.; Cucinotta, A. Disilicate Dental Ceramic Surface Preparation by 1070 nm Fiber Laser: Thermal and Ultrastructural Analysis. Bioengineering 2018, 5, 10.

Abstract

Background: Lithium di-silicate dental ceramics bonding, realized by using different resins, is strictly dependent on micro-mechanical retention and chemical adhesion. The aim of this in vitro study was to investigate the capability of a 1070 nm fiber laser for their surface treatment. Methods: Samples were irradiated by a pulsed fiber laser at 1070 nm with different parameters (Peak Power from 5 kW to 5 kW, RR 20 kHz, speed from 10 to 50 mm/s, total Energy Density from 1.3 to 27 kW/cm2) and the thermal elevation during the experiment was recorded by a Fiber Bragg Grating (FBG) temperature sensor. Subsequently, the surface modifications were analysed by optical microscope, Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). Results: With a Peak Power of 5 kW, RR of 20 kHz and speed of 50 mm/s, the microscopic observation of the irradiated surface showed increased roughness with small areas of melting and carbonization. EDS analysis revealed that, with these parameters, there are no evident differences between laser-processed samples and controls. Thermal elevation during laser irradiation ranged between 5 °C and 9 °C. Conclusions: 1070 nm fiber laser can be considered as a good device to increase the adhesion of Lithium di-silicate ceramics.

Keywords

di-silicate ceramics; fiber lasers; Fiber Bragg Grating; Energy Dispersive X-ray Spectroscopy

Subject

Medicine and Pharmacology, Dentistry and Oral Surgery

Copyright: 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.

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