アブストラクト（26巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Behavior of Titanium in Biological Systems
Subtitle　： BKDC CLINICAL AND RESEARCH TOPICS : Bioadaptives of Dental Materials
Authors　： Takao Hanawa
Authors（kana）　：
Organization　： Biomaterials Research Team, National Research Institute for Metals
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 26
Number　： 2
Page　： 121-127
Year/Month　： 1998 / 9
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] Electrochemical properties, especially passivity, should be understood to discuss ion release from titanium materials in the human body. The behavior of the released metallic ions into biofluid is also governed by electrochemical laws. Electrochemical properties of titanium, the generation and structure of surface oxide film on titanium, the release of metallic ions from titanium and its alloys, the repassivation of titanium, behavior of released titanium ions, and methods of prevention of ion release from titanium, are discussed in this paper. Titanium ions are released by abrasion, fretting, and biological factors in biological systems. However, it is apparent that a released titanium ion will immediately combine with a water molecule or an anion near the titanium ion to form an oxide, hydroxide, or inorganic salt, because the titanium ion is very active according to thermodynamic theory. Titanium ions can not exist for long in a biofluid in the ionic state. Thus, there is only a small chance that the ion will combine with biomolecules to cause toxicity, allergy, and other biological influences.
Practice　： Dentistry
Keywords　： Titanium, Surface oxide, Ion release, Surface treatment