| 摘要 |
An apparatus includes an elongate member having a portion configured to be deformed from a first configuration to a second configuration. In one variation, the apparatus includes an outer body, having a collapsed configuration and an expanded configuration, and an inner body. A portion of the outer body is configured to be disposed between adjacent spinous processes. The inner body is disposed within the interior region of the outer body. The inner body has an outer surface in slidable contact with an inner surface of the outer body.
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