| 摘要 |
Instrumentation for implanting an artificial intervertebral disc includes a dynamic trial for distracting an intervertebral space and/or determining the appropriate size of disc to be implanted, which dynamic trial includes a shaft, at least two distal extensions coupled to the shaft, a bifurcated trial having a first trial half of the bifurcated trial coupled to a first of the extensions and having a second trial half of the bifurcated trial coupled to a second of the extensions, and a pin located between the extensions, wherein movement of the pin in a distal direction increases a separation between the extensions, and wherein varying the separation between the extensions varies a separation between the trial halves.
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