Devices and methods to restore the disc height between adjacent vertebral members. The methods use a variety of different spacers that are each positionable between a first orientation having a reduced height and a second orientation having an enlarged height. The spacer is initially placed within the disc space in the first orientation. The spacer is then expanded to the second enlarged orientation to restore the disc height. While the spacer is expanded or while it is expanding, the material is inserted into the disc space. In one embodiment, the material is initially in a first flowable form that fills the disc space. After the material is inserted, it becomes more viscous to support the vertebral members. At this time, the spacer is returned to the first orientation and removed from the disc space. The material remains within the disc space to permanently maintain the disc height.