second spinous process can seat or otherwise engage in the first tissue seat the portions of the expandable support device in contact with the spinous processes can have soft areas at the expected locations or contact with the bone for example to reduce the subsidence and spinous process fracture e g stress reduction fig3 illustrates that the first tissue seat can have a soft and or resilient cushion e g spring under one or more teeth for example the teeth can be substantially hollow deformable resilient or soft and the cushion can be a resilient material e g metal and or polymer leaf spring foam or combinations thereof the teeth themselves can act as springs or cushions fig3 illustrates that the cushion can be a coating or a pad on the outside of the remainder of the expandable support device the cushion can be made from a soft metal or polymer e g silicone peek or other polymers described herein fig3 illustrates that the first tissue seat can have springs on one or either side of the tissue seat for example the tissue seat can have leaf springs on one or both sides of the tissue seat fig3 a illustrates that the expandable support device.