Spinous process fusion implants

摘要

A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to translate and polyaxially rotate relative to the locking mechanism. A second plate includes at least one polyaxial element for connection with a fixation pad and a connection feature for non-rotatable connection with the locking mechanism. The locking mechanism allows translation and polyaxial adjustment of the first plate relative to the second plate and locks the first and second plates via a taper lock. The fixation pad includes a deflectable spacer configured to prevent premature locking of the pad. Methods for implantation of the bone plate assembly between two bone structures are disclosed. Instrumentation for implantation, compression and locking of the bone plate assembly is disclosed.

主权项

1. A bone plate assembly, comprising:
a first plate, wherein the first plate comprises an obverse side, a reverse side, and a first pivot element configured to allow the plate to pivot about an axis, wherein the reverse side is opposite the obverse side; a second plate comprising an obverse side and a reverse side, wherein the reverse side is opposite the obverse side; a locking mechanism disposed between the first and second plates, said locking mechanism defining a longitudinal axis; and at least one pad carried by the first plate and disposed along the first plate at an offset location with respect to the longitudinal axis, wherein the pad comprises a bearing face including a plurality of protrusions configured to contact a bone and a pad pivot element, wherein the bearing face is adjacent the obverse side, wherein the pad pivot element is configured to allow the at least one pad to pivot about at least one axis relative to the first plate, and wherein the pad pivot element is configured to lock into a fixed position upon receiving a compressive force between the first plate and a bone surface.