Device for anterior fixation of vertebrae

 

The invention relates to medicine, namely to traumatology and neurosurgery. The invention provides reliable fixation of the bodies supporting the vertebrae at different values of diastasis between them with saving a preset angle correction of the spine. The device contains two adapted to the anterolateral surfaces of the vertebral bodies lining with two or three conical end-to-end and Central screw holes, the bone screws with the heads conical entered into through holes in the plates, the plate with two apertures at the ends and fixing screws. The lining is made grooves of rectangular cross-section, deaf in one and end-to-end to another, matching the dimensions of the end portions of the plates. One of the through holes in the end portion of the plate is made of an oval. On the surface of the end portion of the plate from the side of the oval holes and on the surface of the through groove of one of the plates is made parallel to the teeth perpendicular to the sidewalls. 8 Il.

The invention relates to medicine, namely to traumatology and orthopedics.

A device for fixation of the thoracolumbar spine, soderjasimi rods with conical heads, United threaded tails.

The disadvantages of this device is that the end part of the plate is not adapted to the anterolateral curvature tel supporting vertebrae, after installation of the plate it is impossible to adjust the degree of compression of the interbody graft. In addition, the necessary plates of different sizes for a more precise adaptation at different values of diastasis between the base of the vertebrae.

A device for fixation of the spine that contains two pads with a through threaded and through holes arranged perpendicular screw, bone screws with tapered heads of the United threaded tails entered in through the screw holes in the plates, the axial rods entered through holes in the plates, the axial stopper rods in the form of screws, entered into additional screw holes in the plates and blocking axial rods through the holes.

A disadvantage of the known device is that it is difficult to adapt the axial rod in the through holes of the plates when they are nparalleled, which in turn requires them to bend and fit, set screws do not provide reliable fixation of the rods through the holes nadopasana spine, containing two adapted to the anterolateral surfaces of the vertebral bodies lining with two or three conical end-to-end and Central screw holes, bone screws with conical heads entered into through holes in the plates, the plate with two apertures at the ends and fixing screws.

The disadvantages of the known device is that the difficult adaptation of leaf plates with radial teeth to overlap at intermediate angles of rotation about the Central threaded hole and different lengths of diastasis between the pads. Forced their fixation leads to excessive kyphotic or lordotic deformity of the operated segment of the spine. When this occurs or excessive compression of the interbody graft, or instability between the vertebral bodies, which leads to the redistribution of loads between the graft and bone screws. In addition, when a cyclic load in the postoperative period, the weakening of the fixing end of the departments of the plates relative to the Central threaded hole pads with their subsequent angular offset.

The aim of the present invention is obespechenie angle correction of the spine.

This goal is achieved by the fact that in the known device, containing two adapted to the anterolateral surfaces of the vertebral bodies lining with two or three conical end-to-end and Central screw holes, the bone screws with the heads conical entered into through holes in the plates, the plate with two apertures at the ends and fixing screws, plates made grooves of rectangular cross-section, deaf in one and end-to-end to another, matching the dimensions of the end portions of the plates, one of the through holes in the end portion of the plate is made oval, and on the surface of the end portion of the plate from the side of the oval holes and on the surface of the through groove of one of the plates is made parallel to the teeth perpendicular to the side walls.

In Fig. 1 shows a device for anterior fixation of vertebrae in the collection;

in Fig. 2 - plate, rear view;

in Fig. 3 - plate, side view;

in Fig. 4 - plate with a through groove, side view;

in Fig. 5 - plate with a through groove, front view;

in Fig. 6 - cover with a blind groove, side view;

in Fig. 7 - plate with a hollow groove - front view;

in Fig. 8 - cross section a-a in Fig. 1.

Device for prednosone, a hollow groove 4 of rectangular cross section on plate 1 and through the slot 5 in the plate 2, with parallel teeth 6 on the surface of the through groove 5, perpendicular to the side walls 7, through conical holes 8 and a Central threaded hole 9 in the plates 1 and 2, the bone screws 10 entered into through holes 8 in the plates 1 and 2, plate 11 with a through hole 12 in one part and through the oval 13 in the other, parallel with the teeth 14 on the surface side through the oval holes 13, perpendicular to the side walls 15, the fixing screws 16, introduced into the through hole 12 and through the oval hole 13 of the plate 11 and the Central threaded hole 9 of the plates 1 and 2.

The proposed device for anterior fixation of vertebrae is used as follows.

Under General anesthesia is performed surgical access to the anterolateral surface of the bodies of the affected segment of the spine, is localized vertebra, is the complete or partial removal. Perform front corporates auto - or allograft to restore the physiological curvature of the spine. Device for fixation of vertebrae collected previously without bone screws with ostavliaut deep in the groove 4 of the plates 1 and fixed by a screw 16 through the through hole 12 to the plate 1 in the Central threaded hole 7, the other end plate 11 through the oval opening 13 and parallel teeth 14, perpendicular to the side walls 15, is inserted into the through groove 5, and move on parallel teeth 6, perpendicular to the side walls 7, to the installation size is fixed by the screw 16 into the Central threaded hole 7 of the lining 2. Put the device to anterolateral departments of the vertebral bodies adapted surface 3, by selecting the position of the best adaptation linings, mark a token of their position, then Unscrew the ring fixing screws 16, take out the plate 11 from the grooves 4 and 5 of the plates 1 and 2. In the mentioned provisions of the lining is fixed to the vertebral bodies using a template guiding equipment through conical holes 8 of the bone screws 10. Re-insert the plate 11 in the grooves 4 and 5 of the plates 1 and 2, respectively, the initial position and after the compression of the vertebral bodies is fixed by screws 16 into the Central threaded hole 9 of the plates 1 and 2. Ensuring the rigidity of fixation collected by the device bodies supporting the vertebrae postoperative wound is sutured.

The application of this device will ensure a secure fit bodies supporting the vertebrae at different values of diastasis between saisto for anterior fixation of vertebrae, containing two adapted to the anterior-lateral surfaces of the vertebral bodies lining with two or three conical end-to-end and Central screw holes, the bone screws with the heads conical entered into through holes in the plates, the plate with two apertures at the ends and fixing screws, characterized in that the lining is made grooves of rectangular cross-section, deaf in one and end-to-end to another, matching the dimensions of the end portions of the plates, one of the through holes in the end portion of the plate is made oval, and on the surface of the end portion of the plate from the side of the oval holes and on the surface of the through groove of one of the plates is made parallel to the teeth perpendicular to the sidewalls.

 

Same patents:

The invention relates to medicine, namely to oral and maxillofacial surgery, dental surgery

The invention relates to medicine, namely to traumatology and orthopedics

The invention relates to surgery, in particular for traumatology and orthopedics for the treatment of fractures of the distal radial metaphysis of the bone in children and adolescents

The invention relates to medicine, namely to traumatology, orthopedics, and can be used as a means of treatment of plate osteosynthesis of fractures, necroshine, false joints and deformities of the femur

The invention relates to medicine, namely to traumatology and orthopedics

The invention relates to medicine, namely to traumatology and can be used as a means of osteosynthesis of fractures of the tibia

The invention relates to medicine, namely to traumatology, orthopedics and neurosurgery

The invention relates to medicine, namely to traumatology and orthopedics

The invention relates to medicine, namely to traumatology and neurosurgery

The invention relates to medicine, namely to traumatology and orthopedics, and can be used in the treatment of comminuted, intra - and periarticular fractures

The invention relates to medical equipment, namely to devices used for surgical correction and stabilization of the spine at its diseases and injuries

The invention relates to medical equipment, namely to devices used for surgical correction and stabilization of the spine at its diseases and injuries

The invention relates to medical equipment, namely to devices used for surgical correction and stabilization of the spine at its diseases and injuries

The invention relates to medicine, namely to traumatology, orthopedics and neurosurgery

The invention relates to medical equipment, namely to the device used in spine surgery

The invention relates to medicine, namely to traumatology and neurosurgery

The invention relates to medicine, namely to traumatology and neurosurgery

The invention relates to medicine, namely to vertebrology

Distractor // 2212205
The invention relates to medicine, namely to devices for the surgical correction of spinal curvature

The invention relates to medicine, namely to orthopedics

FIELD: medical engineering.

SUBSTANCE: device has two elastic plates and unit for fastening the plates to vertebral arches by means of two hooks placed under the arches on both sides of spinous process, two pins attached to corresponding hook with threaded connection and thrown over the hook with support given by its thrust journal for fastening arches in corresponding hook. The pins have restricting rest means. Connection strap is manufactured as a whole with elastic plate holders building U-shaped clamp having locking protrusions at pedicle ends turned inward. Plate holders are formed by clamp pedicles and locking protrusions. Elongated slot is available in clamp crossbar. The clamp is put over the pins via the elongated slot of the crossbar thrusting against restricting rest means of pins and connected to the pins by means of two nuts screwed over the corresponding pin from the external clamp side. Catching cells are produced in thrust journal of each hook for making additional fixation of the pins.

EFFECT: increased rigidity; fixation stability; accelerated operation process; reduced risk of traumatic complications.

2 cl, 3 dwg

Up!