45 results about "Laminoplasty" patented technology

PCT No. PCT/NZ96/00096 Sec. 371 Date Sep. 25, 1998 Sec. 102(e) Date Sep. 25, 1998 PCT Filed Sep. 11, 1996 PCT Pub. No. WO97/09940 PCT Pub. Date Mar. 20, 1997A device for dynamically stabilizing the lamina after a laminoplasty includes spacer which is shaped to engage between the severed edges of the lamina. The device also includes a retainer attached to the spacer which is adapted to maintain the spacer in an operative position. A method of dynamically stabilizing the lamina after a laminoplasty is also provided, which includes the steps of positioning the spacer between the severed edges of the lamina, and positioning the retainer to maintain the spacer in the operative position.

A medical implant device for use in spinal surgery, and more preferably for use in laminoplasty surgery is provided. The implant is a cage-like member having a generally hollow, elongate body with open ends. The implant is formed from a generally hollow, elongate body having four sides: opposed cephalad and caudal sides, and opposed posterior and anterior sides adjacent to the cephalad and caudal sides. The four sides extend along a longitudinal axis, and define an inner lumen extending between opposed first and second open ends.

A vertebral implant comprising a first base configured for securing to a first cut portion of a vertebra, and second base configured for securing to a second cut portion of the vertebra. A connecting member is configured to associate the first and second bases at a preselected spacing from each other, and the implant is preferable adjustable to select the spacing.

In one embodiment, the present invention is a system for use in a laminoplasty procedure, the system including an implant comprising a first body and a second body, the first and second bodies adapted to slide relative to one another; and an implantation instrument including: a shaft having a longitudinal length, a proximal end, a distal end and a hollow throughbore along at least a portion of its length; a handle positioned on the proximal end of the shaft; an actuator rod having a proximal portion and a distal portion, the actuator rod being positioned within the hollow throughbore of the shaft; a knob adapted to engage the proximal portion of the actuator rod; a first connector adapted to engage the distal portion of the actuator rod; and a second connector fixedly secured to the distal end of the shaft.

A laminoplasty rod and rod system that allows for variable angulation, translation (distraction and/or compression) and rotation of a spinal lamina bone portion associated with a laminoplasty, prior to fixation thereof. The laminoplasty rod is configured for use with a polyaxial spinal rod bone screw assembly that is adapted to be anchored to the vertebra associated with the laminoplasty, and is attachable to the spinal lamina bone portion. The laminoplasty rod system provides positional attachment of the laminoplasty rod to the spinal components associated with the laminoplasty and fixation thereof in various orientations. The laminoplasty rod system is characterized by a configured laminoplasty rod that fits into or onto the head of a polyaxial spinal rod bone screw assembly. A bone screw boss, defining a bone screw attachment configuration, is formed at one end of the laminoplasty rod. Preferably, but not necessarily, the bone screw boss is situated at an angled end of the rod having a pre-defined bend that provides for greater variation in rod orientation.

The invention relates to devices, implants, systems, techniques and methods for addressing certain conditions of the spine, including devices, implants, systems and methods for performing spinal laminoplasty or other expansion of the spinal canal. The devices of the invention are expandable in situ, providing greater versatility for surgeons performing various procedures where expansion of the spinal canal is desired.

Fixation devices and methods for stabilization of the lamina after laminoplasty are described. The device comprises of a plate with several holes that receive bone fasteners. The plate is curved at the ends to contour to the vertebral structure and has appendages to engage the displaced lamina in a fixed position. Alternatively, the plate has a bone fusion spacer in the middle to engage and fuse the lamina in the displaced position. Several methods of dynamically stabilizing the lamina after either the open door, double door or expansive laminoplasty technique are provided.

The invention discloses a universal omni-posterior-double lateral mass bridging board for cervical vertebra. The bridging board is in an arched whole made of a narrow and long metal plate, and comprises two lateral mass fixing plates, two vertebral lamina fixing plates, a spinous platform fixing plate and a bone grafting fixing plate. The bridging board is mainly used for reconstructing a vertebral canal structure after posterior expansive laminoplasty of cervical spine, can simultaneously fulfill fixation of open door side and hinge side in the expansive laminoplasty, the length of each fixing plate and angles among the fixing plates are in accordance with the characteristics of human cervical vertebra dissection; the bridging board has strong biological attachment and can furthest resist posterior pressure, so that the expansive laminoplasty failure caused by crack reclosing at the vertebral open door side and hinge fracture is avoided; the whole structure adapts to the posterior anatomy structure of human cervical vertebra and the characteristics of biological mechanics; and the bridging board can be pre-bent properly in use. The universal omni-posterior-double lateral mass bridging board for cervical vertebra is expected to replace the conventional posterior cervical single open door fixing plate to become a clinical standard postoperative physiology and stability reconstructing method after the posterior cervical single open door expansive laminoplasty.

A portal for accessing a desired lamina portion of a desired cervical vertebra to perform a laminoplasty. In one aspect, a laminoplasty portal is presented that defines an interior conduit and has a first sidewall section and a second sidewall section.

A laminoplasty plate for securing a separated lamina portion of a desired cervical vertebra in a relief position and a method of using the same to perform a laminoplasty. In one aspect, a lamina setting tool is presented for positioning the lamina portion of the desired cervical vertebra in the relief position. In one aspect, the tool has a rotatable threaded shaft with an adjustable stop and a guide having a body portion and a first support arm

A laminoplasty plate for securing a separated lamina portion of a desired cervical vertebra in a relief position and a method of using the same to perform a laminoplasty. In one aspect, a lamina setting tool is presented for positioning the lamina portion of the desired cervical vertebra in the relief position. In one aspect, the tool has a first sidewall section that slides in longitudinal relation to a second sidewall section.

The invention discloses a spinal column vertebral plate open-door fixing system. The spinal column vertebral plate open-door fixing system comprises a fixing plate body, a development needle, a short bone nail and a long bone nail, wherein the fixing plate body is a Z-shaped structure integrally and comprises an upper body fixing end and a lower body fixing end, the upper body fixing end is provided with an upper body fixing end vertical through hole, the lower body fixing end is provided with a lower body fixing end transverse through hole, a hollow sinking bone grafting groove is between the upper body fixing end and the lower body fixing end, the development needle is inserted into the hollow sinking bone grafting groove of the fixing plate body, and the short bone nail and the long bone nail are respectively provided with a short bone nail thread starting point self-tapping cutting edge and a long bone nail thread starting point self-tapping cutting edge. The system is convenient and simple for bone grafting, is simple to operate and is practical, reliable, safe and effective, spinal canal expansion can be instantly realized during operation to protect the back structure, and door re-closing after single open-door spinal canal expansion laminoplasty is prevented. A polyether ether ketone material is selected, so excellent biological compatibility, small side effect and good long-term effect are realized.

The invention relates to a vertebral plate measuring instrument used for determining a grooving position in the single-door laminoplasty. The instrument includes a hand shank, a positioning needle andpositioning arms; the hand shank is provided with a slide groove arranged in the axial direction, and a slider is installed in the slide groove and slidingly cooperated with the slide groove; the middle portions of the two positioning arms are hinged through a hinge pin, and the hinge pin is installed on the hand shank; the rear ends of the positioning arms are hinged to connection rods, one endof each connection rod is hinged to the corresponding positioning arm, the other end of each connection rod is hinged to the corresponding slider, the front ends of the positioning arms are provided with palm parts, and operation windows used for grooving are formed in the palm parts; the front end of the positioning needle is provided with a tapered tip and installed on the hand shank and can slide front and back relative to the hand shank. The vertebral plate measuring instrument can rapidly and accurately determine the grooving position, when near to the outside, the instrument avoids the injury of the vertebral artery, and when near to the inside, the instrument avoids the injury of the dural sac and even medulla spinalis. The instrument is rapid and convenient to operate, the groovingdistance can be ensured, and the optimal decompression effect is achieved; the difficulty of a surgery can be reduced, the surgical operation errors are reduced, the surgery quality is improved, andthe learning curves of young surgeons can be shortened.

A special stabilizing anchor is disclosed which is secured to the spinous process, in addition to anchors which are stabilized against the lateral masses. These anchors couple with the spinous process anchor and upon coupling, the connecting stabilizing element is configured such that this element can be actuated, elevating the spinolaminar arch and thus expanding the canal, relieving the stenosis and completing the surgical procedure. A unique aspect of this system is that the lateral mass anchors of different levels can be secured to each other, stabilizing one or more target motion segments. Augmenting this is a system for identifying and extirpating the facet joints and replacing them with graft material to encourage a posterior/facet fusion.

A spacer for laminoplasty is provided, the spacer including: a first spacer fixed to an upper lamina plate in a state in which an incision surface of the upper laminate plate of a lamina plate of an incised cervical vertebrae is seated on and supported by the first spacer; and a second spacer fixed to a lower lamina plate so that an incision surface of the lower lamina plate of the lamina plate of the incised cervical vertebrae is in contact with and supported by the second spacer, wherein the first spacer and the second spacer are in a coupled state in which they are not separated from each other by a fixed bar, while having expandable lengths with respect to each other.