Abstract: An interspinous fusion device is described. The interspinous fusion device includes a spacer member and an anchor member. The spacer member has a ring with two or more anchor assemblies projecting laterally from substantially opposite sides of the spacer member ring. The spacer member further has a first zip lock flange and a second zip lock flange, each of the first and second zip lock flanges extends transversely from the spacer member ring wherein each of the first and second zip lock flanges each comprises a series of teeth protruding from it. The anchor member has a ring with two or more anchor assemblies projecting laterally from substantially opposite sides of the anchor member ring. The anchor member further has a barrel extending transversely from the anchor member ring. The barrel comprises a first column of recesses adapted to mate with the teeth of the first zip lock flange and a second column of recesses adapted to mate with the teeth of the second zip lock flange.

Abstract: A polyaxial interspinous fusion device is described. The polyaxial interspinous fusion device has a fixed anchor, a polyaxial anchor, and a bone spacer. The fixed anchor has a center ring, one or more fixed anchor arms projecting laterally from the center ring, and a barrel projecting transversely from the center ring. The polyaxial anchor has a socket ring and one or more polyaxial anchor arms projecting laterally from the socket ring, wherein the socket ring has a concave engagement surface. The bone spacer has a spacer head having a convex socket engagement surface that matches the concave engagement surface of the socket ring. The bone spacer also has one or more zip lock flanges extending transversely from the spacer head and one or more bone abutments extending transversely from the spacer head. The zip lock flanges and bone abutments of the bone spacer fit through the socket ring and the barrel of the fixed anchor fits through the socket ring.

Abstract: A height-adjustable vertebral spacer is described. The spacer has a superior member and an inferior member. The superior member has a superior vertebral interface and an inferior nesting interface. The superior vertebral interface includes angled teeth, and the inferior nesting interface has one or more lateral walls with one or more rows of slits formed therein. The inferior member has an inferior vertebral interface and one or more lateral walls with one or more rows of ridges protruding inwardly from the one or more lateral walls. Each of the ridges has an angled bottom side and a flat upper side that is perpendicular to the lateral wall from which it protrudes. When the superior member is mated with the inferior member the one or more ridges of the inferior member are oriented to mate with the one or more slits of the superior member.