Durom™ Hip Resurfacing
Product Information
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A Solution for young and active* patients Since 1988 Metasul® has been successfully used for total hip replacement. Today's metal on metal technology is the result of over one and a half decades of intense development, research and clinical evaluation. This has formed the foundation for the latest evolutionary development -- the Durom™ Hip Resurfacing. * Please refer to the implant's instructions to define the overall scope of activities for each patient. |
Advanced engineering and materials technology coupled with Swiss precision
manufacturing has resulted in this exceptional total hip prosthesis.
Developed for the younger and more active patient, it is designed to provide
high levels of joint stability whilst removing as little bone as possible.
The articulating components are made of Metasul® alloy Protasul™-21 WF, the
first wrought-forged CoCr resurfacing prostheses, which is the same material
used to restore mobility of over 250,000 patients.
Learning as
expressed in design
In designing the femoral component, many
important factors needed to be considered. Bone conservation, precise
positioning and an optimum cementing technique were of utmost importance.
The femoral component has a unique set of properties. The slim-line stem
allows precise positioning and the recesses offer an optimal cementing
technique.
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Minimal thickness, maximum strength The acetabular cup is a flattened hemisphere, offering a greater range and freedom of movement. With a constant wall thickness of 4 mm throughout all sizes, the cup maintains an inner diameter as large as possible, whilst maintaining maximum implant strength and minimum bone resection. A coating of pure titanium using a plasma spray under vacuum and static load is applied to the outer surface, called Porolock™ Ti VPS. As shown in laboratory tensile tests the adhesive strength of the titanium coating of 66.2--76.5 MPa, significantly exceeding the FDA requirements of 22 MPa. |
Reduction of the bearing surface roughness.
The high carbon
CoCr alloy is produced by a forging rather than casting process. This means
that the size of block carbides is up to eight-times smaller compared to
cast CoCr prostheses. The resulting lower surface roughness subsequently
leads to a lower wear rate when compared with cast CoCr alloys. Co-28Cr-6
Mo-0,2C/Protasul™-21 WF (ISO 5832-12): a carbide-containing and therefore
low-wear cobalt chrome alloy was chosen for Metasul™.
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Experience and innovation benefit the patient As with almost any joint replacement system, precise and easy-to-use instruments is the key to the successful restoration of the patient's anatomy and function. In developing of the Durom™ Hip Resurfacing the engineers not only focused on implant design and material technology. At the core was the surgical procedure, which had to address the specific needs and considerations of how to best resurface of the hip. As a result, an ingenious method to accurately and precisely position the components in the optimum position, was created. |
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Not just a resurfacing The option of the Metasul® LDH™ Large Diameter Heads offers the advantage of a low wear solution whilst providing greater joint stability and high range of motion. This facility is available in combination with the extensive range of cemented and uncemented femoral implants from Europe's largest manufacturer of joint prostheses -- Zimmer Gmbh. Confidence and choice -- even if you have to revise a resurfacing femoral component! |
