| 摘要 |
<p>An implantable modular orthopedic prosthesis (10, 110), preferably for hip (10) or knee (110) arthroplasty, is disclosed which consists of three components (12, 20, 24; 112, 120, 124). A first component has an elongated stern (12, 112) with a free end (14, 114), configured to be situated within the intramedullary canal of a patient's bone, and an opposite end (16, 116) having an articulating portion such as a Morse-tapered member (18, 118). A second component (20, 120) has another articulating portion which can also be a corresponding Morse-tapered member (22, 122) that is matingly engageable with the articulating portion (18, 118) of the first component (12, 112). A third component (24, 124) has a body (26, 126) with a linearly-extruded channel (28, 128) through which the articulating portions (18, 22; 118, 122) are adjustably received, wherein at least one of the components (12, 20; 112, 120) is radially-expansible (32, 132) to pressure lock against an internal surface (30, 130) of the channel (28, 128) in a selected position and arrest the first (12, 112), second (20, 120) and third (24, 124) components together as the articulating portions (18, 22; 118, 122) are fully engaged with one another. The present modular orthopedic implant (10, 110) functions as a unitary biomechanical structure and is easy to use, as it is interoperatively adjustable to fit minute variations in a patient's given anatomy, while minimizing the inventory of component sizes needed on hand during surgery.</p> |
