Proposed is a spinal cage. The spinal cage includes a bone support portion configured to be disposed between a first vertebra at an upper side and a second vertebra at a lower side to support the first vertebra, a base portion positioned at a lower side of the bone support portion to come in contact with the second vertebra, and a sidewall portion which has an upper side end connected to an edge of the bone support portion and a lower side end connected to an edge of the base portion and includes an elastic band having elasticity and inelastic bands having relatively lower elasticity or no elasticity. Therefore, subsidence of the spinal cage into vertebrae can be suppressed.

A system and method for sharing and absorbing energy between body parts. In one particular aspect, the system facilitates absorbing energy between members forming a joint such as between articulating bones.