PSI - Issue 42

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 42 (2022) 1520–1528

23 European Conference on Fracture - ECF23 Experimental investigation of adhesion strength of dental ceramic to Ti6Al4V alloy fabricated by milling and selective laser melting Tsanka Dikova a *, Angel Anchev b , Vladimir Dunchev b , Dzhendo Dzhendov a , Yavor Gagov a a b b a a a

a Faculty of Dental Medicine, Medical University “Prof. Dr Paraskev Stoyanov” -Varna, Varna 9000, Bulgaria b Faculty of Mechanical Engineering, Technical University of Gabrovo, 4 Hadji Dimitar Str, Gabrovo 5300, Bulgaria

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 do not meet the required 25 MPa of the standard. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Ti6Al4V; CAD/CAM milling; selective laser melting; dental ceramic; adhesion strength Abstract The aim of the present paper is to investigate the bond strength of dental ceramic to Ti6Al4V alloy fabricated by milling and selective laser melting (SLM). The adhesion strength is studied by 3-point flexural test of samples with porcelain coating. Two groups of specimens are manufactured by milling and SLM. Four different surface treatments are used before porcelain application - no surface treatment (control), sandblasting and application of bonding agent on untreated and sandblasted surfaces. The coating of leucite-reinforced glass-ceramic is manufactured on the one side of the samples. It is found that the adhesion strength of the porcelain coating to the titanium alloy produced by both methods has close values: 17.63 – 30.89 MPa for the milled and 22.12 – 31.04 MPa for the SLM alloy. The surface treatments of the metal substrate have different effect on the adhesion strength. Sandblasting and combined treatment increase the adhesion strength of the porcelain to the milled samples, but decrease that in the SLM ones. The application of the given bonding agent decreases the adhesion strength of the ceramic to the Ti6Al4V alloy produced by both technologies. In the milled alloy, the highest adhesion strength is in the sandblasted samples, followed by these with combined treatment, while for the SLM samples, the adhesion strength in the control group is the highest, followed by the sandblasted samples. Milled samples treated with the given bonding agent, and SLM specimens with combined surface treatment

* Corresponding author. Tel.: +359-899-833-125; fax:. E-mail address: tsanka.dikova@mu-varna.bg

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 2452-3216 © 2020 The Authors. Published by Elsevier B.V.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.193