The size specifications of titanium alloys commonly used in spine joint trauma abroad are as follows:
1. Titanium plate
Thickness: 0.4-35mm
Maximum size: 2500mmx6000mm
International brand: Gr23 (corresponding to TC4 titanium alloy)
2. Titanium tube
Diameter: 0.8-219mm
Implementation standard: ASTM B337/338, AMS ESB337/338 .etc.
3. Titanium rod
Diameter: 6-1000mm
Length: customizable (common specifications such as L600mm, L1200mm
International brand: Gr23 (corresponding to TC4 titanium alloy)
Trauma (titanium plate)
Gr23 Gr4 Ti-6Al7Nb
1.0-6.0mm Ø6 Ø8 Ø4
Intramedullary nail
Ø14 Ø15 Ø16 Ø18
Spine: Ø5.5 (6.0) Ø 8 Ø10 Ø (10.2 10.5) Ø14 (14.28 14.5)
Joint: Ø20 Ø25 Ø35 Ø45 Ø50 Ø55 Ø60 Ø65, (customized Ø70 Ø80 Ø90)
Application scenarios:
Spinal fixation: Titanium plates are used for fracture reduction and fixation, with a thickness of usually 2-5mm and a length customized according to the vertebral segment.
Trauma repair: Titanium alloy screws (diameter 3.5-6.5mm) and intramedullary nails (diameter 8-12mm) are common choices.
Joint replacement: Titanium alloy femoral stems (diameter 12-28mm) and acetabular cups (diameter 40-60mm) need to match the patient's bone size.
Material properties:
TC4 (Ti-6AI-4V): The elastic modulus is close to that of bones, and the tensile strength is ≥895MPa, which is widely used in orthopedic implants.
TC4ELI (ultra-low gap type): It has better biocompatibility through the ISO5832-3 ELI standard and is suitable for long-term implants.
The above sizes and standards mainly refer to international general specifications (such as ASTM, F136, ISO5832-3, GBT-13810), and specific products need to be customized according to clinical needs.
