Author
Şimşek, Görkem Muttalip, Ipekoglu, M., Yapıcı, Güney Güven
Publication Date
2020-08-02
Publication Place
-
Springer Nature
Subject
NiTi, Coating, Hydroxyapatite, Corrosion, Cell viability, Surface wettability
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0947-8396
Record ID
d6c3ab6e-56a3-4803-9d7d-77aca109e532
Library Location
Mechanical Engineering
Date
2020-08-02
Notes
Ozyegin University
Sample Text
Successful short-term implementation of nickel-titanium (NiTi) alloys as implants has been a motivation for the development of long-term applications. However, rendering these as safe implant materials is challenging. The major problem associated with the use of NiTi for in-vivo applications is the potential risk of Ni release from the implant surface due to the corrosive environment of the body. Various methods including surface treatment techniques with acid and alkali solutions and application of biocompatible coatings have been used to overcome these difficulties. In particular, NaOH pre-treatment has been commonly performed for surface activation of the substrate material to enhance the adhesion properties of coatings. The present work investigates the effect of NaOH pre-treatment on the hydroxyapatite (HA) coating and the resulting corrosion behavior of and cell response to HA coated NiTi wires. Microstructural examinations showed that the coating integrity deteriorated with prior NaOH treatment which also increased the corrosion rate as evidenced by potentiodynamic measurements. XPS analysis revealed heightened Ni levels on the sample surfaces and cytotoxicity tests showed decreased cell viability for the samples with pre-treatment. Absence of NaOH pre-treatment led to lower contact angle values pointing to higher biocompatibility.
DOI
10.1007/s00339-020-03847-1
Cilt
126
