| 摘要 |
Systems and methods for providing a cavity in an interior body region are described. In one described method, a spring disposed between a first plate and a second plate is compressed. The compressed spring is inserted into a cannula comprising a cannula distal end. The spring is decompressed, at least in part, once at least one of the first and second plates is inserted beyond the cannula distal end to a treatment area adjacent a tissue. The decompression of the spring increases a distance between the first and second plates.
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