Titanium implantation materials for the living body

A titanium implant for the living body comprising a dental or orthopedic implant made of titanium having a corrosion resistant oxide film on the surface thereof formed by anodizing, thermal oxidation, or molten salt oxidation and having the total amount of first ingredients selected from the group consisting of oxygen, hydrogen, nitrogen and carbon (excluding the oxygen contained in the surface oxide film) controlled to 10 to 4000 ppm, and the upper limit of second ingredients including Fe other than said first ingredients set to 100 ppm for purity to promote formation and regeneration of a corrosion-resistant film, the balance being titanium, so that said corrosion resistant oxide film may be promptly regenerated, even if destroyed, in vivo, wherein the implant has a tensile strength (TS) of 175 MPa or more and an elongation (El) of 10% or more.

A wire for implanting in the living body comprising a titanium fixation wire in which the upper limits of the amounts of first ingredients contained therein are 300 ppm for oxygen, 50 ppm for hydrogen, 200 ppm for nitrogen, and 400 ppm for carbon, to give an elongation necessary for fixation;

• and in which the upper limit of the amounts of second ingredients other than said first ingredients is 100 ppm for purity, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more, and an elongation (El) of 30% or more and an average crystal grain diameter of 2 to 150 .mu.m.

A wire for implanting in the living body comprising a titanium fixation wire in which the upper limits of the amounts of first ingredients contained therein are 200 ppm for oxygen, 50 ppm for hydrogen, 200 ppm for nitrogen, and 400 ppm for carbon, to give an elongation necessary for fixation;

• and in which the upper limit of the amounts of second ingredients other than said first ingredients is 100 ppm for purity, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more, and an elongation (El) of 30% or more and an average crystal grain diameter of 2 to 150 .mu.m.

A wire for implanting in the living body comprising a titanium fixation wire in which the upper limits of the amounts of first ingredients contained therein are 100 ppm for oxygen, 50 ppm for hydrogen, 200 ppm for nitrogen, and 400 ppm for carbon, to give an elongation necessary for fixation;

• and in which the upper limit of the amounts of second ingredients other than said first ingredients is 100 ppm for purity, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more, and an elongation (El) of 30% or more and an average crystal grain diameter of 2 to 150 .mu.m.

A wire for implanting in the living body comprising a titanium fixation wire in which the upper limits of the amounts of first ingredients contained therein are 100 ppm for oxygen, 30 ppm for hydrogen, 100 ppm for nitrogen, and 200 ppm for carbon, to give an elongation necessary for fixation;

• and in which the upper limit of the amounts of second ingredients other than said first ingredients is 50 ppm for purity, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more, and an elongation (El) of 30% or more and an average crystal grain diameter of 2 to 150 .mu.m.

A wire for implanting in the living body comprising a titanium fixation wire in which the iron content is from 100 to 1000 ppm so as to enhance strength;

• the upper limits of the amounts of first ingredients contained are 250 ppm for oxygen, 50 ppm for hydrogen, 170 ppm for nitrogen, and 340 ppm for carbon;
• and in which the upper limit of the amounts of second ingredients other than iron and said first ingredients is 100 ppm, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more and an elongation (El) of 30% or more.

A wire for implanting in the living body comprising a titanium fixation wire in which the iron content is from 100 to 800 ppm so as to enhance strength;

• the upper limits of the amounts of first ingredients contained are 250 ppm for oxygen, 50 ppm for hydrogen, 170 ppm for nitrogen, and 340 ppm for carbon;
• and in which the upper limit of the amounts of second ingredients other than iron and said first ingredients is 100 ppm, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more and an elongation (El) of 30% or more.

A wire for implanting in the living body comprising a titanium fixation wire in which the iron content is from 100 to 600 ppm so as to enhance strength;

• the upper limits of the amounts of first ingredients contained are 250 ppm for oxygen, 50 ppm for hydrogen, 170 ppm for nitrogen, and 340 ppm for carbon;
• and in which the upper limit of the amounts of second ingredients other than iron and said first ingredients is 100 ppm, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more and an elongation (El) of 30% or more.

A wire for implanting in the living body comprising a titanium fixation wire in which the iron content is from 100 to 600 ppm so as to enhance strength;

• the upper limits of the amounts of first ingredients contained are 200 ppm for oxygen, 30 ppm for hydrogen, 100 ppm for nitrogen, and 200 ppm for carbon;
• and in which the upper limit of the amounts of second ingredients other than iron and said first ingredients is 100 ppm, the balance being titanium, the wire having a tensile strength (TS) of 175 MPa or more and an elongation (El) of 30% or more.