Orthopedic Implants, Part 2 – Required Component Characteristics Define Finish

Joint reconstruction implants are subject to the same zero-defect performance and reliability standards as any other implant. However, because two components are always interacting with each other, dimensional accuracy is of particu­lar importance.

Within the medical industry, surface finishing experts such as Rosler assist implant manufacturers in achieving the exact finish needed for each surface of the joint.

In addition to increasing product popularity and demand for the manufacturer and providing medical professionals with safe and dependable joint replacements, ensuring that orthopedic implants have the exact finishing required enables the joint to function longer and more comfortably for the patient.

Implant Characteristics

The finish of orthopedic implants must meet a variety of characteristics for successful surgical outcomes.

  • Biocompatibility – Implants must be compatible with the living tissue by being non-toxic and not injuri­ous, physiologically reactive, or capable of causing immunological rejection. This includes corrosion resistance to prevent reaction with bodily fluids.
  • High-tensile strength and long-life span – Joint reconstruction implants are exposed to considerable static and dynamic loads. They must withstand these loads for a lifetime without ever breaking.
  • Low friction at the joint contact areas – Very smooth, polished surfaces of joint areas that move against each other is required. For example, between femoral and tibia or femoral head and lining of the acetabular cup.
  • No sharp edges – All edges must be rounded. Sharp edges must be avoided to prevent ruptured blood vessels and blood clots during insertion and the healing process.
  • High osseointegration at surface areas, which are implanted into the bone – A somewhat textured, rougher surface is required to allow bone tissue to at­tach itself to the implant.
  • Low dimensional tolerances – Implant components must be very precise so that the fit and function of the joint is not compromised.
Femur implants in various stages of mass finishing

The Rosler Way

Providing precise, repeatable surface finishing requires understanding what the manufacturer hopes to achieve and how the component will be utilized. We take great pride in our work within the medical industry worldwide and our role in supplying safe, effective orthopedic implants.

Contact Rosler to put our decades of experience to the test.

The complete Orthopedic Implant Series began with Part 1 – “Surface Finishing Enhances Component Life, Function.”

Future posts in the series will include:

  • Part 3 – “Materials Must Provide Strength, Safety.”
  • Part 4 – “Finishers Meet Standards, Face New Challenges.”
  • Part 5 – “Mass Finishing Offers Medical-Grade Polishing.”
  • Part 6 – “Shot Blasting Improves Longevity.”
  • Part 7 – “Processing Technology Evolves with Industry Advancements.”

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