Crossbar spinal prosthesis having a modular design and related implantation methods
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[0074] The crossbar 105, in a first embodiment, has a first end 110 and a second end 115. In the illustrated embodiment the crossbar 105 is a two piece bar where the first end 110 is attached to a threaded male portion 104 having threads 109. The crossbar second end 115 is attached to a threaded female portion 106 sized to receive the threads 109. As will be described in greater detail below, the threaded ends allow for the width of the crossbar to be adjusted to mate with the width between caudal bearings 150 (FIG. 9). Additional alternative embodiments of the crossbar 105 could include a series of solid crossbars of varying widths and / or thicknesses, or an adjustable crossbar having some form of locking or biasing mechanism (such as a spring-loaded tensioner or detent mechanism, etc.).
[0075] A pair of cephalad prosthesis elements 120 are also illustrated in the exemplary embodiment of the configurable and adaptable spinal prosthesis 100 of the present invention. Each cephalad pro...
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