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Pre-oxidation of selective-laser-melted titanium dental alloy : effects on surface characteristics and porcelain bonding
ID
Antanasova, Maja
(
Author
),
ID
Kocjan, Andraž
(
Author
),
ID
Abram, Anže
(
Author
),
ID
Kovač, Janez
(
Author
),
ID
Jevnikar, Peter
(
Author
)
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https://www.tandfonline.com/doi/full/10.1080/01694243.2021.1877003
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Abstract
The heat treatment of dental alloys prior to porcelain application/veneering has been proposed as a way to ensure sufficient oxide scale and to promote the porcelain's adherence in porcelain-fused-to-metal (PFM) fixed dental prostheses. The present study investigates the relationship between the bond strength of the dental porcelain to selective-laser-melted (SLM) titanium and the temperature of the titanium's pre-oxidation. The SLM Ti-6Al-4V substrates were airborne-particle abraded and either left to passivate in air at room temperature (control) or pre-oxidized in a furnace under vacuum conditions (10kPa) at temperatures of 300, 600, 750, or 800 °C. The surface characteristics were determined using contact profilometry to measure the profile roughness (R$_a$), atomic force microscopy for the surface roughness (S$_a$) and Auger electron spectroscopy for the thickness of the oxide scale. Dental porcelain was applied to the metal substrates and the titanium-ceramic bond was assessed according to the ISO standard 9693-1:2012. The metal-ceramic interfaces were analyzed with scanning electron microscopy and energy-dispersive spectroscopy. The R$_a$ and S$_a$ values showed a strong positive correlation with the pre-oxidation temperature. The oxide scales covering the titanium surfaces thickened markedly at temperatures of 750 °C and above. However, the bond strength was negatively correlated with the pre-oxidation temperature. Room-temperature passivation in air following the airborne-particle abrasion of the SLM titanium resulted in a titanium-ceramic bond that is well above the ISO 9693-1:2012 recommended minimum value for metal-ceramic systems. Thus, no pre-oxidation of SLM titanium frameworks is necessary prior to the application/firing of porcelain.
Language:
English
Keywords:
prosthetic dentistry
,
bond strength
,
titanium
,
metal-ceramic
,
selective laser melting
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
MF - Faculty of Medicine
Publication status:
Published
Publication version:
Version of Record
Year:
2021
Number of pages:
Str. 2094-2109
Numbering:
Vol. 35, no. 19
PID:
20.500.12556/RUL-141219
UDC:
616.31
ISSN on article:
0169-4243
DOI:
10.1080/01694243.2021.1877003
COBISS.SI-ID:
50192131
Publication date in RUL:
26.09.2022
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566
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67
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Record is a part of a journal
Title:
Journal of adhesion science and technology
Shortened title:
J. adhes. sci. technol.
Publisher:
Taylor & Francis
ISSN:
0169-4243
COBISS.SI-ID:
34942720
Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Secondary language
Language:
Slovenian
Keywords:
protetično zobozdravstvo
,
trdnost vezi
,
titan
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0087
Name:
Keramični in komplementarni materiali za napredne inženirske in biomedicinske aplikacije
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