CN2088851U

CN2088851U - Frame type fixator for vertabral column reduction

Info

Publication number: CN2088851U
Application number: CN 91215385
Authority: CN
Inventors: 汤华丰
Original assignee: SHANGHAI BONE FRACTURE RESEARCH INST
Current assignee: SHANGHAI BONE FRACTURE RESEARCH INST
Priority date: 1991-04-24
Filing date: 1991-04-24
Publication date: 1991-11-20

Abstract

The utility model provides a frame type fixture for spine reposition, which is mainly composed of vertebral arch pedicle screws, connectors, fixing plates, regulating rods and limiting devices. The utility model has the same axis with every vertebral arch pedicle screw, and the upper end of the utility model is provided with the connectors. Both ends of the regulating rod are matched with connector-holes and are provided with the limiting devices for adjusting the length. Two parallel regulating rods are arranged along the longitudinal direction of the spine, and two parallel fixing plates which are connected to the connectors by screwing mode are arranged along the latitudinal direction of the spine, a frame structure being formed. Owing to that the vertebral arch pedicle screws are screwed in the third-column of the spine and the spine can be reduced and fixed through longitudinal and latitudinal regulation, the utility model has the advantages of simple structure, convenient operation and stabilization of reposition and fixation.

Description

Frame type fixator for vertabral column reduction

This utility model relates to the internal fixation medical apparatus and instruments that resets behind a kind of human body lumbar vertebra compression fracture, particularly a kind of frame-type restoring backbone holder.

At orthopaedics clinically, for the treatment of lumbar vertebra compression fracture, it is generally acknowledged now Ha Shi rod (Harrington rod) internal fixation make patient activity early, union of fracture early, malformation correction is good.But Ha Shi rod two ends collude upper little joint and the next vertebral plate that the shape adapter has just caught on the fracture vertebra respectively, therefore fixing strong inadequately, and fixed sections is long, the localized immobilization of the sections of can not accomplishing to fracture is often excellently colluded phenomenon with taking off with disconnected.Dick (Dick) nail apparatus has been fixed with very big development for resetting of spinal column, it is by three posts of LOCATION OF PEDICLE SCREW FIXATION vertebra, each screw upper side is connected to adapter, be provided with the threaded bar of regulating the length effect between per two screws, and link to each other with adapter, played few, safer, the fixed effect that resets reliably of fixed-segment, but it is when operation, each junction point, there have four primary screws to regulate to be fixing, and it is fixing that promptly per two threaded bar will have 16 primary screws to regulate, therefore, operation is comparatively complicated, and operating time is long.

The purpose of this utility model is to provide that a kind of simple in structure, operation technique is convenient, fixed-segment is few, the horizontal and vertical fixing safe and reliable frame-type restoring backbone holder that resets of spinal column.

Task of the present utility model is finished like this: the main adapter that joins by pedicle screws, with pedicle screw, and the restoring backbone holder of the regulating rod that is connected with two adapters composition, be provided with the adapter of regulating rod installing hole, be positioned at the upper end of each pedicle screw, and with the same axis of pedicle screw, the regulating rod that cooperates with the adapter installing hole is provided with stopping means.At spinal column two parallel regulating rods are arranged vertically, every regulating rod two ends cooperate by the hole, be connected with the adapter on two pedicle screws, the fixing head that two parallel band installing holes are laterally arranged at spinal column, every fixing head two ends are fixed as screw thread with the adapter that is positioned at two parallel regulating rod ends by installing hole, constitute frame-type restoring backbone holder with this.

The frame-type restoring backbone holder that this utility model provides, carrying out vertebra three posts respectively with four pedicle screws fixes, regulating rod only need carry out the hole and cooperate and can carry out contact with adapter and be connected, after adjusting required regulating rod length of restoring backbone and corresponding fixing head length, carrying out the regulating rod extension position with stopping means on regulating rod fixes, fixing head has just been finished the fixing operation that resets after fixing with screw thread, therefore, apparatus simple in structure, regulate flexibly, operation technique is convenient, be the strongest reset fixing.

Below in conjunction with the accompanying drawings concrete structure of the present utility model is described in any further with embodiment:

Fig. 1 is the front view of a kind of frame-type restoring backbone holder of providing of this utility model.

Fig. 2 is the three-dimensional view of Fig. 1 structure.

Fig. 3 is the front view of frame-type restoring backbone holder another embodiment.

Fig. 4 is the three-dimensional view of Fig. 3 structure.

The frame-type restoring backbone holder shown in Figure 2 as Fig. 1, its pedicle screw 1 that screws in vertebra three posts has four, adapter 2 and pedicle screw 1 that every pedicle screw top joins are integral machine-shaping, two symmetrical sides of adapter 2, be provided with the cross installing hole, top one section screw rod in addition of adapter, the top of screw rod is a four directions, so that use box spanner, screw is screwed in pedicle of vertebral arch.The regulating rod that between two pedicle screws, cooperates with adapter, adopt Ha Shi rod (Harrington rod) structure 3, its shouldered end cooperates with installing hole on the adapter, the other end is the cone pole, cooperate with the installing hole on another adapter, the matched in clearance precision of utilization cone great circle and adapter installing hole, make when cooperating, as long as adjust the axiality of regulating rod and adapter, make the segment of cone rod end can insert the adapter installing hole smoothly, when spinal column needs reduction by traction, with specific purpose tool (strutting pincers), and the conical surface guidance quality when utilizing the cone pole to withdraw from, the cone pole is fallen back on the required sections of the length that resets, and the site error of stressed back of utilization regulating rod and adapter installing hole, make the cone great circle of regulating rod cone pole be stuck in adapter 2 installing hole places, the unlikely repetition inserted, and other has an elastic opening circle 4, be stuck on the regulating rod cone pole at adapter installing hole place as stopping means, guaranteed the length that resets reliably of regulating rod.Vertical along spinal column, regulating rod has two, and the spinal column both sides are respectively established one, corresponding with it, pedicle screw 1 has four, and other has two fixing heads 5, there is an installing hole at the two ends of every fixing head, and installing hole is bar shaped, to regulate the distance between horizontal two pedicle screw 1 upper ends of spinal column.Two fixing heads 5 are enclosed within respectively in one section screw rod above regulating rod two terminal adapters by installing hole, and it is fastening with nut to adjust the distance back, has promptly finished the restoring backbone fixing operation.

According to the technical solution of the utility model also as shown in Figure 3, Figure 4 structure implement: pedicle screw 1 and adapter 2 adopts isolating constructions.Longly in the middle of regulating rod adopts hang tight the bolt 6 that nut 7 and two ends thereof are threaded with it and form, the connecting thread rotation direction at two ends is opposite.The end of bolts at two ends 6 is vertical respectively a through hole that supplies pedicle screw 1 to pass, and has a nut 8 to make stopping means.The installing hole that a regulating rod bolt 6 is vertically arranged of each adapter, vertical have a through hole that cooperates with pedicle screw 1, the regulating rod bolt is with after adapter cooperates, pedicle screw 1 top that screws in vertebra three posts and adapter 2 and bolt 6 installing holes that are engaged in the adapter thereof cooperate, realized pedicle screw, adapter, and regulating rod three's connection, spinal column vertically has two regulating rods, four pedicle screws equally.Rotation regulating rod intermediary length hangs tight nut 7, i.e. the length that resets of 1 of vertical two pedicle screw of scalable, and the nut of regulating on the bolt 68 can play length qualification effect again.Two fixing heads 5 that laterally have equally of spinal column are enclosed within the upper end of regulating rod two ends pedicle screw 1, regulate the distance that resets on top between two pedicle screws after, with nut fixing head is fixed on above the adapter, promptly finished reset operation.

Claims

1, a kind of frame-type restoring backbone holder, mainly by pedicle screw 1, reach the regulating rod composition that is connected with two adapters with the adapter 2 that pedicle screw joins, the adapter 2 that it is characterized in that being provided with the regulating rod installing hole is positioned at the upper end of each pedicle screw 1, and with the same axis of pedicle screw, at spinal column two parallel regulating rods are arranged vertically, the two ends of every regulating rod cooperate with adapter 2 on two pedicle screws by the hole and are connected, and be provided with stopping means, at the fixing head 5 that two parallel band installing holes are laterally arranged of spinal column, every fixing head is fixedly connected on the adapter 2 of horizontal two pedicle screws by installing hole.

2, frame-type restoring backbone holder according to claim 1 is characterized in that adapter 2 and pedicle screw are one, the top screw rod that also has one section mounting plate of adapter, and the top of this screw rod is a four directions.

3, frame-type restoring backbone holder according to claim 1 and 2, it is characterized in that regulating rod adopts Ha Shi bar structure 3, the one end is a cylinder, cooperate with the installing hole of adapter, and a spacing convex shoulder arranged, the other end is the cone pole, cooperates with another adapter installing hole, and the stopping means after having an elastic opening circle 4 as regulating rod upper cone pole end length adjustment.

4, frame-type restoring backbone holder according to claim 1 is characterized in that the vertical of adapter 2 also has a through hole to match with pedicle screw 1.

5, according to claim 1 or 4 described restoring backbone holders, it is characterized in that regulating rod, by a long nut 7 that hangs tight, and the bolt 6 that two ends are threaded is with it formed, the connecting thread rotation direction at two ends is opposite, bolt 6 ends at two ends cooperate with vertical installing hole of adapter, and also there is a vertical through hole that passes for pedicle screw the bolt end, and bolts at two ends respectively has a nut 8 as stopping means.