Devices and methods for treating degenerative conditions of the spine or for alleviating pain or discomfort associated with the spinal column are disclosed. In particular, laminoplasty fixation devices and methods are disclosed. Also disclosed, is a vertebral implant comprising a first bone engaging portion configured for securing to a first cut portion of a vertebra and a second bone engaging portion configured for securing to a second cut portion of the vertebra. A body portion is provided for associating the first and second bone engaging portions at a preselected spacing from each other, wherein the implant is adjustable to select said spacing.

An implant device includes a connection bridge to cause retraction or distraction of first and second bone segments. The connection bridge overlaps a surface of the segments and exerts a force to one of the first and second bone segments by translation motion of connection bridge. The bridge includes a first insertion structure mountable to the first segment and has at least one rack. An internal repositioning tool has a pinion to engage the rack causing the motion. A locking mechanism selectively locks the motion of the repositioning tool. A second insertion structure mounts to the second segment or a third bone segment between the first and second segments. The second structure includes a housing to house at least one of the pinion and the lock mechanism and receive a portion of the at least one rack to engage the at least one the pinion and the lock mechanism.

A bone distraction device having a ratchet and pawl assembly such that incremental rotation is allowed in one direction and prevented in the other, and further having a quick release mechanism such that the ratchet and pawl mechanism can be released to allow free rotation in both directions. The device has a pawl housing mounted onto a rod housing, the pawl housing having a sloping transition shoulder diminishing to transition onto the outer surface of the rod housing. In other embodiments, the device has a sleeve housing with an enlarged end telescopically mounted onto a rod housing, the enlarged end having a sloping transition shoulder diminishing to transition onto the outer surface of the sleeve housing.

Devices and methods for treating degenerative conditions of the spine or for alleviating pain or discomfort associated with the spinal column are disclosed. In particular, laminoplasty fixation devices and methods are disclosed. Also disclosed, is a vertebral implant comprising a first bone engaging portion configured for securing to a first cut portion of a vertebra and a second bone engaging portion configured for securing to a second cut portion of the vertebra. A body portion is provided for associating the first and second bone engaging portions at a preselected spacing from each other, wherein the implant is adjustable to select said spacing.

A bone plate (1) with at least one receiving opening (2) for a bone screw (3) with a screw head (4), wherein the receiving opening (2) has a compression area (5) with a compression contour (6) and a blocking area (7) with a blocking contour (8). The compression contour is designed such that rotation of the bone screw in its one screwing-in direction (E) causes lateral movement of the bone screw toward the blocking area (7). The compression contour (6) is designed as an engagement contour (6), such that lateral movement is generated by engagement between the engagement contour (6) and a mating contour (9) on the screw head or tool. A surgical kit containing at least one such bone plate (1) and at least one bone screw with a screw head (4), which bone screw is insertable into the receiving openings of the bone plate (1) is also disclosed.

A dynamic subsidence plate is described having a first plate member and a second plate member in sliding engagement that may infinitely subside between a first and second assembled position. The plate includes a lock assembly associated with the first and second plate members. The lock assembly includes a ramp portion, an interference portion, and a bearing member situated between the ramp portion and the interference portion. The lock assembly of the plate is configured to allow movement of the first member with respect to the second member in a first direction in an infinite number of positions between a first assembled position and a second assembled position. Further, the lock assembly alternatively prevents movement of the first member with respect to the second member in an opposite second direction between the first and second assembled positions.

An implantable fixation device for rejoining opposed portions of a separated bone. The device including two corresponding plates that are configured to be aligned and coupled to a bone, such as a sternum, pre-resection of the bone or prior to cutting/separating the bone. The placement of the corresponding plates provides a gap between the edges of the plates that face one another allowing for and guiding a cutting tool for separating the bone. After the bone has been cut and the desired surgical procedure performed, the plates also assist in realigning and fixation of the bone portions. At least one plate includes a ratchet mechanism that is configured to tighten a locking element and draw the two plates together and into alignment with one another.

A ratcheting epiphysiodesis plate comprises a female base half having a ratchet arm and a male sliding half having a series of ratchet teeth, the male sliding half being slidably connected to the female base half with the ratchet arm engaging the ratchet teeth, one of the female and male sliding halves including a first fixation element receiving hole for receiving therethrough a fixation element for binding the plate to a bone.

The present disclosure relates to a system comprising a dynamic locking bone plate and screw that provide a plate and screw complex for fracture fixation. The plate comprises a plurality of screw holes, each screw hole adapted to receive a screw. The screw threads allow for insertion into bone with compression of the plate to bone and the four male components on the screw head allow for the screws to be locked into place in the plate once they interact with the female components of the plate. The screw locking heads will come in two form, one plush fit to the locking plate and the other offset to allow some movement in the screw plate complex. On the under surface of the plate, the plate comprises a raised area or protrusion defining the bone to plate contact surface. The area between adjacent screw holes is adapted to allow for customisation by the surgeon intra-operatively for optimal fracture fixation. The screw head comprises a tapered shoulder to allow for compression at the fracture site if placed in an eccentric position.

A ratcheted spinal device including a variable-length member including a ratchet mechanism that has an operative configuration that allows a change in length of the variable-length member in one direction and prevents a change in length of the variable-length member in an opposite direction, wherein the variable-length member includes polyaxial-joint attachment members for attachment to bone, which permit pivoting movement of the attachment members about more than one pivoting axis.