title: Highly wear-resistant and biocompatible carbon nanocomposite coatings for dental implants.
abstract: Diamond-like carbon coatings are increasingly used as wear-protective coatings for dental implants, artificial joints, etc. Despite their advantages, they may have several weak points such as high internal stress, poor adhesive properties or high sensitivity to ambient conditions. These weak points could be overcome in the case of a new carbon nanocomposite coating (CNC) deposited by using a C60 ion beam on a Co/Cr alloy. The structure of the coatings was investigated by Raman and XPS spectroscopy. The wear resistance was assessed by using a reciprocating tribotester under the loads up to 0.4 N in both dry and wet sliding conditions. Biocompatibility of the dental implants was tested in vivo on rabbits. Biocompatibility, bioactivity and mechanical durability of the CNC deposited on a Co/Cr alloy were investigated and compared with those of bulk Co/Cr and Ti alloys. The wear resistance of the CNC was found to be 250-650 fold higher compared to the Co/Cr and Ti alloys. Also, the CNC demonstrated much better biological properties with respect to formation of new tissues and absence of negative morphological parameters such as necrosis and demineralization. Development of the CNC is expected to aid in significant improvement of lifetime and quality of implants for dental applications.
authors.affiliation: Center for Nano-Wear, Yonsei University, 120-749, Seoul, South Korea.
authors.forename: Oleksiy V
authors.initials: OV
authors.lastname: Penkov
authors.affiliation: The Institute of Problems of Chemical Physics of the Russian Academy of Sciences, 142432, Chernogolovka, Russian Federation.
authors.forename: Vladimir E
authors.initials: VE
authors.lastname: Pukha
authors.affiliation: Kharkiv Medical Academy of Postgraduate Education, 61176, Kharkiv, Ukraine.
authors.forename: Svetlana L
authors.initials: SL
authors.lastname: Starikova
authors.affiliation: Center for Nano-Wear, Yonsei University, 120-749, Seoul, South Korea; Department of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Khadem
authors.affiliation: National Technical University, "Kharkiv Polytechnic Institute", 61002, Kharkiv, Ukraine.
authors.forename: Vadym V
authors.initials: VV
authors.lastname: Starikov
authors.affiliation: National Technical University, "Kharkiv Polytechnic Institute", 61002, Kharkiv, Ukraine.
authors.forename: Maxim V
authors.initials: MV
authors.lastname: Maleev
authors.affiliation: Center for Nano-Wear, Yonsei University, 120-749, Seoul, South Korea; Department of Mechanical Engineering, Yonsei University, 120-749, Seoul, South Korea. Electronic address: kimde@yonsei.ac.kr.
authors.forename: Dae-Eun
authors.initials: DE
authors.lastname: Kim
mesh_terms: D000497:Alloys / Q000737:chemistry; D000818:Animals; D002244:Carbon / Q000737:chemistry*; D002858:Chromium Alloys / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D015921:Dental Implants; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry*; D011817:Rabbits; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000497:Alloys; D002858:Chromium Alloys; D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D002244:Carbon; D014025:Titanium
keywords: Biocompatibility; Carbon nanocomposite; Dental implants; In vivo; Wear resistance