Common Used Orthopedic Implant Titanium Alloys

Size and Specifications and Parameters of Common Used Orthopedic Implant Titanium Alloys within China and Abroad:

International Common Used Specifications:

1. T-6Al-4V (ASTM F136)

Composition: T1-6Al-4V (aluminum 6%, vanadium 4%)

Elastic modulus: about 110 GPa

Tensile strength: 1100MPa (annealed state)

Application: skull prosthesis, knee prosthesis, bone plate, screws, etc.

2.T-12M0-6Zr-2Fe (TMZF)

Composition: T1-12Mo-6Zr-2Fe

Elastic modulus: 74 GPa

Tensile strength: 2980MPa (fracture toughness 298 MPa·m'/2)

Application: spinal fusion, long bone fracture fixation device.

3.T-13Nb-13Zr

Composition: T-13Nb-13Zr

Elastic modulus: 80GPa (after solution aging)

Tensile strength: 21100 MPa

Application: joint prosthesis stem, non-load-bearing parts.

4.T-29Nb-13Ta-4.6Zr

Composition: T1-29Nb-13Ta-4.6Zr

Elastic modulus: 55 GPa (after solution aging)

Tensile strength: 2850MPa

Application: spinal fusion, craniofacial implants.

2. Commonly used specifications in China

1. TC4 (Ti-6Al-4V)

Composition: TI-6Al-4V (6% aluminum, 4% vanadium)

Elastic modulus: about 110 GPa

Tensile strength: 21100MPa (annealed state)

Application: trauma internal fixation devices (bone plates, screws).

2.TB20 (T1-3.5A1-5Mo-4V-2Cr-2Zr-2Sn-1Fe)

Composition: T-3.5A1-5Mo-4V-2Cr-2Zr-2Sn-1Fe

Elastic modulus: 1300 MPa

Tensile strength: 21300 MPa

Application: high-strength orthopedic components (such as femoral stem)

3.Ti-15Mo-3Nb

Composition: T-15MO-3ND

Elastic modulus: about 80 GPa

Tsile strength: 21100 MPa

Application: spinal fixation system, non-load-bearing components.

4.TB8 (T1-22Nb-6Zr-2Sn)

Composition: T-22Nb-6Zr-2Sn

Elastic modulus: 60 GPa (after solution aging)

Tensile strength: 21000 MPa

Application: artificial joints, dental implants.

Comparison of key parameters:

Development trend

1. Low modulus: By adding elements such as Nb, Ta, and Zr, the elastic modulus is reduced to 55-80GPa, matching human bone tissue (10-40GPa).

2. Functional design: Add antibacterial elements such as Cu and Ag to inhibit bacterial infection Beams (such as T-5Cu alloy).

3. Additive manufacturing: Use metastable B titanium alloy (such as T-15Mo-5Zr-3A1) to manufacture complex structures through 3D printing technology.

The above parameters are synthesized from orthopedic titanium alloy research and standards at home and abroad. Specific applications need to be combined with clinical needs and material performance optimization.