worldwide sales at nearly $10 billion annually, there is a high demand for
spinal implants. These implants are subject to very specific and strict surface
finishing requirements to ensure longevity and fixation to bone.
Mass finishing and shot blasting play key roles in creating the right finish for spinal implants, not only for intermediate surface treatment after forging, casting, machining, additive manufacturing, etc., but also for placing the final surface finish before implantation.
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 ofMass 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
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