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Based on both anthropometric measurements and kinematic
studies in our simulator, we have developed with Wright Medical Technologies a
radial head replacement which is based on the concept of modularity. We are
currently working on a wrist implant, designed to improve the kinematics of the
joint and reduce loads on the implant-bone structure.
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The "Evolve" radial head implant was developed in our
laboratory in conjunction with Wright Medical Technology. Five head sizes can be
matched with any of the five stems to achieve a more anatomically correct
implant. A morse-taper is used to achieve fixation between the two
components. |
We have also explored the efficacy of custom-made
implants, based on the concept of "reverse-engineering" of an implant from an
image. Using an MRI image of the radial head, a machine code is automatically
generated that machines an identical match of the bone surface from either
plastic or metal. Thus, it is possible to produce an exact match of the patients
joint, which we postulate will result in a more anatomical fit, improving wear
and reducing joint stresses.
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