Biomedical Device Cushions Vertebrae to Treat Chronic Back Pain

Artificial disc imitates the natural motion of the spine.
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  1. Spinal disc - Located in the spinal column, a spinal disc mainly acts as a shock absorber between two vertebrae, and is composed of two parts: a tough outer portion and a soft inner core. The human spine has 23 discs and 24 vertebrae.
  2. Compliant mechanism - Single-piece structures, like tweezers or nail clippers, that can change their size, shape, or both, in response to forces.