The company has a group of cooperation teams engaged in the Porous Metal Cups industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.
BACKGROUND: A total hip replacement has two components, the acetabular (cup) and the femoral implants (thigh bone and ball). Early attempts at hip replacement were made as far back as 1891 using ivory, and the first hip replacement using metal components was in 1940. These early attempts at hip replacement only replaced the femoral head (ball) and did nothing to the arthritic acetabulum (socket). As biomaterials, technology, surgical techniques, and our understanding of the arthritic process have evolved, total hip replacement surgery has become one of the most successful operative procedures in all of medicine.
INTRODUCTION: During the early evolution of the modern hip replacement, implants were fixed to the bone by using surgical cement. And though this cement fixation worked well over the short term, too many patients experienced implant failure due to early cement loosening. A significant technological breakthrough occurred in the 1980s with the early development of “cement-less” implants. It was found that if implants were coated with a special surface, bone would grow and heal directly to the metal itself without the need for cement fixation. This direct healing of bone to the implant created a much more durable and longer lasting bond. As a result, modern hip replacement designs far outperform and outlast their cemented counterparts of the past. However, longevity is not the only goal of hip replacement surgery. The restoration of natural anatomy is vital to the success of the operation.
POLARSTEM Design
RESTORATION OF NATURAL HIP ANATOMY
• BONE INGROWTH: In order for a cement-less hip implant to survive the rigors of daily use, a bond must be created between the implant and the bone. While this used to be accomplished
with cement, we now have the technology to stimulate the native bone to grow into the metal implant, leading to a much more durable construct. The POLARSTEM is a pure titanium stem at its core. Then, small titanium particles are melted to create a plasmic liquid which is sprayed onto the base stem. This “roughens” the smooth metal surface, leaving increased surface area and texture for bony ingrowth. Additionally, the plasma spray is then coated with hydroxyapatite (HA) molecules, a substance well known to stimulate bone growth.
R3 Acetabular Shell
STIKTITE POROUS COATING: The inner core of the R3 Cup is
constructed of pure solid titanium. However, where the titanium contacts
the bone it is covered with a thin layer of highly textured titanium spray,
similar to the POLARSTEM’s plasma spray. This coating is specifically
engineered to maximize bony ingrowth and increase the longevity of the
bond. This highly specialized coating allows the shell to “grip” the bone for
the first 4-6 weeks (through friction) while the bone bonds to the metal.
VERILAST Technology (For Hip & Knee Replacements)
Verilast technology is the strategic development combination of a new type of metal ball that is smoother with
reduced frictional characteristics articulating with a new stronger plastic socket that is much more resistant to
wear. This combination has produced a hip that is much more durable than past
implants.
• REDUCED WEAR: As the hip joint moves and bears the weight of the body, the
metallic ball rubs against and into the plastic liner of the cup. Over time, this
friction causes wear of the plastic that can cause the hip to fail. The perfect hip
replacement would be made of a material that allows for frictionless and wear-free
motion. While no such material exists, the Oxinium (zirconium) femoral head has
the lowest frictional properties of any material on the market.
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