Effect of amorphous calcium phosphate coatings on tribological properties of titanium grade 4 in protein-free artificial saliva

Progress in dental implant prosthetics largely depends on developing new biomaterials and understanding the complex processes of their tissue adaptation. The related tribological wear phenomena within the dental system determine the durability and quality of the newly developed dental biomaterials....

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Bibliographic Details
Published in:Biotribology (Oxford) 2022-12, Vol.32, p.100219, Article 100219
Main Authors: Osak, Patrycja, Maszybrocka, Joanna, Kubisztal, Julian, Łosiewicz, Bożena
Format: Article
Language:English
Subjects:
Amorphous calcium phosphate
Artificial saliva
Microstructure
Titanium
Tribological wear
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Summary:Progress in dental implant prosthetics largely depends on developing new biomaterials and understanding the complex processes of their tissue adaptation. The related tribological wear phenomena within the dental system determine the durability and quality of the newly developed dental biomaterials. This paper presents an assessment of the tribological wear of the amorphous calcium phosphate (ACP) coatings on the commercially pure titanium Grade 4 (CpTi G4) substrate subjected to sandblasting and autoclaving in artificial saliva. The ACP coatings were produced using electrochemically assisted deposition (ECAD). The tribological properties were studied in a reciprocating motion in the system of ball-on-disc in protein-free artificial saliva. The surface morphology and chemical composition was characterized using the SEM and EDS method, respectively. The surface wettability was tested using the sitting drop in the air. It was found that the presence of the ECAD-derived ACP coating increases surface roughness, local contact potential difference, surface wettability, and resistance to tribological wear of CpTi G4 substrate significantly improving its service life. The tribological wear of CpTi G4/ACP occurred according to the three-body abrasion wear mechanism, in which artificial saliva played a key role as a biological lubricant. [Display omitted] •Amorphous calcium phosphate coatings improve tribological properties of CpTi G4 in saliva.•Volumetric wear was reduced in a reciprocating motion in the ball-on-flat system.•Friction coefficient was reduced.•Hydrophilic properties were improved.•Artificial saliva plays a key role as a lubricant in the wear mechanism of CpTi G4/ACP.
ISSN:2352-5738
2352-5738
DOI:10.1016/j.biotri.2022.100219