Category Archives: Medical

Joint Reconstruction, Part 6 – Shot Blasting for Surface Finishing, Coating Preparation, and Increased Component Life Span

Like mass finishing, shot blasting is an exceptionally versatile surface treatment technology. Its applications range from general cleaning after casting and forging to shot peening and, even, cosmetic blasting for placing a fine, matte finish on the work pieces.

For shot blasting of orthopedic implants Rosler Metal Finishing recommends mainly air and occasionally wet blasting systems. The blast media is accelerated by compressed air and thrown at the work pieces through a blast nozzle, creating an extremely precise blast pattern compared to turbine blasting. Another advantage of air blasting is that it can be used with metallic, mineral as well as organic blast media.

These attributes and many more make this surface finishing method particularly useful in the medical industry

Continue reading Joint Reconstruction, Part 6 – Shot Blasting for Surface Finishing, Coating Preparation, and Increased Component Life Span

Joint Reconstruction, Part 5 – Mass Finishing for Smooth, polished surfaces

Mass finishing is a highly versatile finishing technology that can be used for a wide variety of different surface treatment operations including those in the medical industry. Therefore, it is no surprise that mass finishing processes are utilized at practically every manufacturing stage for all kinds of orthopedic implants.

Rosler Metal Finishing has decades of experience in mass finishing. In this installment of the Joint Reconstruction Series, we will compare the various machines used to provide precise finishing for endoprosthetic manufacturers.

Examples of Mass Finishing

Mass finishing is used for a variety of joint replacement work pieces including:

  • Descaling and edge radiusing of hip stems, knee femorals, and other implants after forging or casting, e.g. lost wax or investment casting. 
  • Deburring and surface smoothing of various implants after belt or CNC grinding.
  • Final polishing of knee femorals, femoral heads, and the inside of acetabular cups to Ra = 0.8 micro inches as the last finishing stage before implantation.
Continue reading Joint Reconstruction, Part 5 – Mass Finishing for Smooth, polished surfaces

Joint Reconstruction, Part 4 – Comparing Surface Finishing Methods

Shot blasting and mass finishing have become indispensable technologies for surface preparation and finishing of joint reconstruction implants. Their applications range from surface cleaning, deburring, edge radiusing after forging, casting, additive manufacturing, and machining to surface preparation for different kinds of coatings, shot peening for increasing the longevity of an implant, and placing an extremely smooth, high-gloss finish on the implants before they are inserted into the body.

Rosler Metal Finishing leverages its extensive experience in the medical industry to create customized solutions and equipment for the treatment of joint reconstruction implants.

This installment of the Joint Reconstruction Series will compare the working principles and features of utilizing shot blasting and mass finishing technologies for endoprosthetic implants.

Continue reading Joint Reconstruction, Part 4 – Comparing Surface Finishing Methods

Joint Reconstruction, Part 1 – Expertise for Endoprosthetics

With more than $18 billion in annual worldwide sales, implants for joint reconstruction make up nearly 40 percent of all orthopedic product sales. More active lifestyles and increased life expectation continue to contribute to the rapid growth of this market segment.

Thanks to significant advancements on the material side and enhanced surface finishing technologies, artificial hips and knees can last more than 20 years before they must be replaced. Rosler Metal Finishing’s shot blasting and mass finishing capabilities are examples of processes and equipment that have and continue to evolve to accommodate the demand for increased endoprosthetics which are also known as orthopedic joint reconstruction implants.

These techniques play a key role in intermediate processing steps including cleaning, deburring/edge radiusing, surface smoothing, and surface preparation for coatings after casting, forging, machining, CNC grinding as well as placing the final finish on the implants before they are inserted.

Continue reading Joint Reconstruction, Part 1 – Expertise for Endoprosthetics