Description of Cobalt Chrome Alloy Stem
Cobalt Chrome Alloy Stem is a component typically made from a cobalt-chromium (CoCr) alloy and is used in various applications, particularly in medical, aerospace, and industrial fields where high strength, corrosion resistance, and biocompatibility are critical.
Features of Cobalt Chrome Alloy Stems
Strength: In the context of cobalt chrome alloy, its properties allow us to further refine joint replacement surgery due to the stem's strength. Serving as a biologically compatible "substitute metal" for human bones, its durability allows it to withstand the wear and tear of walking and running daily. Its remarkable force-resistant properties, far surpassing those of standard stainless steel, enable its bone substitute to survive over a decade of use while maintaining stability and structural integrity.
Corrosion Resistance: The cobalt-chromium alloy stems showcase remarkable strength surpassing that of standard stainless steel, but its sustained performance is made possible through their corrosion resistance. Its stem alloys possess a unique feature of developing an oxide shield with outstanding corrosion-resistant properties, rivaling platinum's corrosion resistance. Active surface treatments such as electrolytic polishing and passivation further improve protective capabilities while lowering the risk of corrosion. Clinical data shows that 90% of the protective film remains intact after a decade post-surgery, with the releasable amount of hazardous heavy metal ions being only 1/20th of the permissible limit, assuring valuable reliability. This unmatched corrosion resistance is what makes cobalt-chromium alloys preferred candidates for joint replacement.
Biocompatibility: Perhaps its most distinguishing characteristic is its remarkable biocompatibility. The body accepts it almost like natural bone and does not activate rejection mechanisms once implanted. It does not rust or degrade over long exposure to bodily fluids, guaranteeing sustained safety and reliability.
Wear Resistance: The material is also wear-resistant, which is important for the lifespan of the joint prosthesis as the stem rotates against the acetabular cup during hip replacement or against the tibial component in knee replacement.
Applications of Cobalt Chrome Alloy Stem
1. Medical Applications
Cobalt-chromium alloy stems are mostly known in the medical domain for orthopedic implants such as hip and knee prostheses. These stems form part of the implant that is inserted into the femur for hip replacements or into both tibia and femur in case of knee replacements.
- Hip Replacement Stems: These stems are inserted into the femur to enable the artificial hip joint to have a firm anchor. They are crafted with utmost strength and durability to withstand when walking, running, or engaging in other activities.
- Knee Replacement Stems: The stems might be utilized to retain the proximal tibial component of the total knee replacement to the bone. In other cases, the stems add more stability and support to the implant.
2 Aerospace and Industrial Applications
Beyond medical use, cobalt-chromium alloy stems are also employed in high-stress fields such as aerospace and industrial applications.
- Aerospace: In aerospace, cobalt-chromium alloy stems are used in landing gear components due to their high strength and resistance to wear caused by repeated takeoffs and landings.
- Industrial: In industrial applications, these stems are incorporated into mechanical parts that require high strength, wear resistance, and corrosion resistance.
Standard and type of Cobalt Chrome Alloy Stem
|
Specification |
Product Type |
|
UNS R30006 |
Rod, Casting parts |
|
UNS R30106 |
P/M Parts |
|
UNS W73006 |
Electrode |
|
UNS W73036 |
Wire |
|
AMS 5387, AMS 5373 |
Castings |
|
AMS 5788 |
Rod, Wire |
|
AMS 7239 |
P/M Parts |
Standard and type of Cobalt Chrome Alloy Stem
FAQ for Cobalt Chrome Alloy Stem
What is the MOQ?
A: Depends on quantity, generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days, which depends on the quantity and production.
What is the package?
A: cartoon case or plywood case.
What is the lead time?
A: From the order placed to cargo receiving will take around 10-25 days.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL, or FedEx. Also, we can send by sea to a seaport or by air to the closest airport.
How long does a cobalt chrome alloy stem typically last?
A: Clinical studies show these stems maintain excellent function for 15-20 years in 90%+ of patients - that's equivalent to walking over 5 million steps without significant wear!
Is the metal detectable during airport security scans?
A: While detectable, most modern security systems recognize medical implants. We provide an implant ID card to simplify travel.
Can I have MRI scans after receiving this implant?
A: Yes! Our latest alloy formulation reduces MRI interference by 40% compared to older models. However, always inform your radiologist about your implant.
What makes cobalt chrome more durable than titanium?
Key advantages:
✓ 3x more wear-resistant
✓ Withstands higher impact loads
✓ Better maintains shape under stress
(Though slightly heavier than titanium)
Are there activity restrictions with this implant?
A: Most patients return to:
Walking/hiking (unlimited)
Swimming/cycling (recommended)
Golf/tennis (after healing)
Only high-impact sports like running marathons may require caution.
How does the surface polishing improve performance?
A: Our mirror-like finish (0.05μm) provides:
• 60% less friction than rough surfaces
• Better fluid film retention
• Reduced particulate wear debris
What if I'm allergic to metals?
A: While rare (<0.3% incidence), we offer:
Pre-op allergy testing
Alternative ceramic-coated options
Special hypoallergenic formulations
Why choose cobalt chrome over newer polymers?
Proven advantages:
• 30+ years of clinical success
• 10x longer lifespan than plastic joints
• No risk of plastic particle disease
• More natural joint kinematics
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