title: Surface properties and biocompatibility of nitrided titanium for abrasion resistant implant materials.
abstract: Corrosion, other related properties and biocompatibility of surface nitrided titanium were investigated to examine its possible use as an abrasion resistant implant material. The nitrided layer about 2 microm thick composed of TiN and Ti2N was formed on titanium by a gas nitriding method. The dissolved amount of titanium ion in SBF was as low as the detection limit of ICP, and that in the 1% lactic acid showed no significant difference from titanium. The tissue reaction of the cylindrical implant in soft tissue of rats showed no inflammation, and fine particles of 1 microm induced phagocytosis, which was similar to titanium. The implantation in the femor showed the new bone formed in direct contact with implants. All the results suggested that the wettability, corrosion resistance, S. mutans adhesion and biocompatibility were nearly equivalent to those of titanium. The surface of nitrided titanium was promising, with biocompatibility comparable with titanium, as an implant material such as for an abutment part of a dental implant, which requires high abrasion resistance.
authors.affiliation: Division of Removable Prosthodontics and Stomatognathostatic Rehabilitation, Department of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University, Kita-13, Nishi-7, Kita-ku, Sapporo 060-8586, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Tamura
authors.forename: Atsuro
authors.initials: A
authors.lastname: Yokoyama
authors.forename: Fumio
authors.initials: F
authors.lastname: Watari
authors.forename: Takao
authors.initials: T
authors.lastname: Kawasaki
mesh_terms: D000818:Animals; D001422:Bacterial Adhesion; D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids / Q000737:chemistry; D001842:Bone and Bones / Q000473:pathology / Q000601:surgery; D003238:Connective Tissue / Q000473:pathology / Q000601:surgery; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry*; D015921:Dental Implants; D062109:Dermatologic Surgical Procedures; D019344:Lactic Acid / Q000737:chemistry; D008422:Materials Testing; D009584:Nitrogen / Q000737:chemistry; D016348:Osseointegration; D010012:Osteogenesis; D010316:Particle Size; D010587:Phagocytosis; D051381:Rats; D017208:Rats, Wistar; D012867:Skin / Q000473:pathology; D012995:Solubility; D018709:Statistics, Nonparametric; D013295:Streptococcus mutans / Q000502:physiology; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D017155:Wettability; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D003722:Dental Alloys; D015921:Dental Implants; D019344:Lactic Acid; C041500:titanium nitride; D014025:Titanium; D009584:Nitrogen