CN2717398Y

CN2717398Y - T-shape reduction fixing device for spinal column

Info

Publication number: CN2717398Y
Application number: CN 200420023168
Authority: CN
Inventors: 罗亚平
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-05-28
Filing date: 2004-05-28
Publication date: 2005-08-17
Anticipated expiration: 2014-05-28

Abstract

The utility model discloses a T spine reduction fixation device, comprising three pairs of pedicle of vertebral arch screws, a pair of connecting rods, and a transverse connecting rod. The upper section of each of the connecting rods is an oblate thread; the midsection of each of the connecting rods is a longitudinal lifting hole which can be sliding up and down; the lower section of each of the connecting rods is a transverse hole. The tail end of each pair of the pedicle of vertebral arch screws has a U groove, and is connected with the oblate threaded rod of the upper part of each of the connecting rods by the embedding of sliding screw caps, and has reliable functions of anti rotation and anti hopping stick. The separation of axial direction or the condensation force can be caused by the tightening of the screw caps of the upper and the lower parts of each of the connecting rods and various fractures of thoracic and lumbar vertebrae can be cured, wherein, a lifting pedicle of vertebral arch screw is arranged in the longitudinal lifting hole of the midsection of each of the connecting rods, and the lumbar spondylolisthesis can be cured by the lifting effect. The top of the lifting pedicle of vertebral arch screw is connected with the transverse connecting rod. The structure of pairs of screw rods can be integrated. The intrinsic stability of the internal fixation device can be increased. The loosing of the connecting section of the internal fixation device which is caused by the rotary motion of the trunk can be effectively prevented. The T hole of the lower section of each of the connecting rods is convenient to position the connecting rods, and although one side of the pedicle of vertebral arch screws are not arranged on a shaft line, the connecting rods are simply positioned.

Description

T shape restoring backbone fixture

Technical field:

This utility model relates to medical apparatus and instruments, relates in particular to orthopedic instrument, particularly spinal column internal fixation device or regulator, and concrete is a kind of T shape restoring backbone fixture.

Background technology:

In the prior art, orthopaedics utilizes spinal fixation mechanotherapy spinal fracture, slippage, with resetting of impaired spinal fixation and slippage vertebral body, helps its healing.At present used spinal fixation apparatus mainly contains the short segment internal fixation inner fixer that resets, and as Steffee, RF and Dick internal fixation device, perhaps single-unit section inner fixer is as LSRF etc.The above-mentioned holder fixed forms that adopt two pairs of pedicle screws can not obtain enough bed knifes more, especially can not be used for centrum olisthe patient and osteoporotic patient; The spinal fixation apparatus that also has adopts the fixed form of three pairs of pedicle screws, but the not problem of conllinear of three pieces of pedicle screws takes place often, makes steel plate lay very difficulty, and its axially to strut power little, cause reset capability undesirable.

Summary of the invention:

The purpose of this utility model provides a kind of T shape restoring backbone fixture, the holder that described this T shape restoring backbone fixture will solve two pairs of pedicle screws of available technology adopting can not obtain the technical problem of enough bed knifes, also will solve the holder light plate that adopts three pairs of pedicle screws and lay difficulty, axially struts that power is little, the unfavorable technical problem of reset capability.

T shape restoring backbone fixture of the present utility model is by three pairs of pedicle screws, the connecting rod of a pair of fixing described pedicle screw and a horizontal connecting rod constitute, be provided with the capable slidably screw hole of cross-drilled hole at described horizontal connecting rod two ends, wherein, any one described connecting rod all has an end of thread and a T type end, axially being provided with one and vertically lifting the hole of stage casing, the body of rod upper edge connecting rod of the stage casing connecting rod between any one described end of thread and T type end, axially being provided with one and laterally lifting the hole on the body of rod of any one described T type end perpendicular to the stage casing connecting rod, it is oblate that the cross section of the body of rod of the described end of thread is, the surface of the body of rod of the described end of thread is provided with screw thread, include a pair of first pedicle screw in described three pairs of pedicle screws, a pair of second pedicle screw and a pair of the 3rd pedicle screw, all be connected with described first pedicle screw on the body of rod of any one described end of thread, any one described first pedicle screw all has a tail end that takes the shape of the letter U, have a cross section in the described tail end that takes the shape of the letter U and be oblate stern notch, the diameter of described stern notch matches with the diameter of the described end of thread body of rod, be provided with two nuts on any one described end of thread body of rod, described two nuts are separately positioned on the both sides of the tail end of described first pedicle screw, any one described vertically lifting is equipped with described second pedicle screw respectively in the hole, the rear of any one described second pedicle screw is provided with screw thread, be provided with nut on the rear of any one described second pedicle screw, the two ends of described horizontal connecting rod are provided with the screw hole of walking crosswise, in the screw hole of walking crosswise at described horizontal connecting rod two ends the screw that can walk crosswise slip can be set, the screw hole of walking crosswise at described horizontal connecting rod two ends is inserted in the rear of described a pair of second pedicle screw respectively, the Kong Zhongjun that laterally lifts of any one described T type end is equipped with described the 3rd pedicle screw, the rear of any one described the 3rd pedicle screw is provided with screw thread, and the rear of any one described the 3rd pedicle screw is provided with nut.

Further, any one described end of thread body of rod axially with the axial angles that become 174 degree of described stage casing connecting rod, described stage casing connecting rod axially become 174 angles of spending with described T type end body of rod plane.

Further, two nut profiles on any one described end of thread body of rod are all tapered, and described two nuts embed in the stern notch of first pedicle screw from the both sides of described first a pedicle screw tail end respectively.

This utility model work process is: with the treatment of waist 4 centrum olisthes is example, be screwed into first pedicle screw at pedicle of vertebral arch place, both sides, human body L3 position respectively, pedicle of vertebral arch place, both sides, human body L3 position is screwed into and indulges second pedicle screw that the hole is complementary that lifts of shape slip, and pedicle of vertebral arch place, L5 both sides is screwed into T shape end and laterally lifts the 3rd pedicle screw that the hole is complementary; Place connecting rod, tighten the below earlier and laterally lift the 3rd pedicle screw that the hole is complementary with T shape end, load onto first pedicle screw at connecting rod upper threaded end bar, tighten the nut up and down of embedding, regulate nut up and down as required, make it produce the powerful power that struts, make the broadening of slippage intervertebral space, the screw hole that horizontal connecting rod two ends are walked crosswise is inserted in the second pedicle screw afterbody then, produce the power of lifting by tightening the second pedicle screw afterbody nut again, the slippage vertebral body is promoted reset,, can increase its stability and improve bulk strength because laterally the connecting rod connection is integrated nail bar structure.

Compared with prior art, structure of the present utility model has the following advantages: it is easy and simple to handle for this utility model, even if occur a side pedicle screw not on an axis its device lay also very convenient; Can produce the powerful power that vertically struts; Can be effectively to resistance to axial compression; Can strengthen the slippage vertebral body is lifted the dynamics of resetting; Fix advantages such as more firm, simultaneously, the end of thread body of rod with oblate cross section cooperates with first pedicle screw with U type stern notch, can prevent that first pedicle screw from producing around the axial rotation of the end of thread body of rod, the nut that is arranged on the first pedicle screw both sides simultaneously can prevent the first pedicle screw jump stick.

Description of drawings:

Fig. 1 is the structural representation of the connecting rod in the T shape restoring backbone fixture of the present utility model.

Fig. 2 is the structural representation of first pedicle screw in the T shape restoring backbone fixture of the present utility model.

Fig. 3 is the structural representation of T shape restoring backbone fixture of the present utility model.

Fig. 4 is the sketch map of two nuts on the end of thread body of rod in the T shape restoring backbone fixture of the present utility model.

Fig. 5 is the sketch map of the horizontal connecting rod in the T shape restoring backbone fixture of utility model.

The specific embodiment:

As Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, this utility model T shape restoring backbone fixture, by three pairs, i.e. 6 pieces of pedicle screws, the connecting rod 1 of a pair of fixing described pedicle screw and a horizontal connecting rod constitute, wherein, any one described connecting rod 1 all has an end of thread 11 and a T type end 12, axially being provided with one and vertically lifting hole 2 of stage casing, the body of rod upper edge connecting rod 13 of the stage casing connecting rod 13 between any one described end of thread 11 and T type end 12, axially being provided with one and laterally lifting hole 3 on the body of rod of any one described T type end 12 perpendicular to stage casing connecting rod 13, it is oblate that the cross section of the body of rod of any one described end of thread 11 is, the surface of the body of rod of any one described end of thread 11 is provided with screw thread, include a pair of first pedicle screw in described three pairs of pedicle screws, a pair of second pedicle screw and a pair of the 3rd pedicle screw, all be connected with one first pedicle screw 4 on the body of rod of any one described end of thread 11, any one described first pedicle screw 4 all has a tail end that takes the shape of the letter U 41, have a cross section in the described tail end that takes the shape of the letter U 41 and be oblate stern notch 42, the diameter of described stern notch 42 matches with the diameter of the described end of thread 11 bodies of rod, be provided with two nuts 5 on any one the described end of thread 11 body of rod, described two nuts 5 are separately positioned on the both sides of the tail end 41 of described first pedicle screw 4, any one described vertically lifting all is equipped with one second pedicle screw 6 in the hole 2, the rear of any one described second pedicle screw 6 is provided with screw thread, be provided with nut on the rear of any one described second pedicle screw 6, laterally lifting of any one described T type end 12 all is equipped with one the 3rd pedicle screw 7 in the hole 3, the rear of any one described the 3rd pedicle screw 7 is provided with screw thread, is provided with nut on the rear of any one described the 3rd pedicle screw 7.Described horizontal connecting rod 43 two ends are respectively arranged with one and walk crosswise slidably screw hole 44, described horizontal connecting rod 43 vertically is positioned over above described connecting rod 1 stage casing, and described screw hole 44 is inserted in the rear of described a pair of second pedicle screw 6 respectively.

Further, any one the described end of thread 11 body of rod axially with the axial angles that become 174 degree of described stage casing connecting rod 13, any one described stage casing connecting rod 13 axially become 174 angles of spending with described T type end 12 body of rod planes.

Further, two nut 5 profiles on any one the described end of thread 11 body of rod are all tapered, and described two nuts 5 embed in the stern notch 42 of first pedicle screw 4 from the both sides of first pedicle screw, 4 tail ends 41 respectively.

Claims

1, a kind of T shape restoring backbone fixture, by three pairs of pedicle screws, the connecting rod of a pair of fixing described pedicle screw and a horizontal connecting rod constitute, it is characterized in that: any one described connecting rod all has an end of thread and a T type end, axially being provided with one and vertically lifting the hole of stage casing, the body of rod upper edge connecting rod of the stage casing connecting rod between any one described end of thread and T type end, axially being provided with one and laterally lifting the hole on the body of rod of any one described T type end perpendicular to the stage casing connecting rod, it is oblate that the cross section of the body of rod of the described end of thread is, the surface of the body of rod of the described end of thread is provided with screw thread, include a pair of first pedicle screw in described three pairs of pedicle screws, a pair of second pedicle screw and a pair of the 3rd pedicle screw, all be connected with described first pedicle screw on the body of rod of any one described end of thread, any one described first pedicle screw all has a tail end that takes the shape of the letter U, have a cross section in the described tail end that takes the shape of the letter U and be oblate stern notch, the diameter of described stern notch matches with the diameter of the described end of thread body of rod, be provided with two nuts on any one described end of thread body of rod, described two nuts are separately positioned on the both sides of the tail end of described first pedicle screw, any one described vertically lifting is equipped with described second pedicle screw respectively in the hole, the rear of any one described second pedicle screw is provided with screw thread, be provided with nut on the rear of any one described second pedicle screw, the two ends of described horizontal connecting rod are provided with the screw hole of walking crosswise, the screw hole of walking crosswise at described horizontal connecting rod two ends is inserted in the rear of described a pair of second pedicle screw respectively, the Kong Zhongjun that laterally lifts of any one described T type end is equipped with described the 3rd pedicle screw, the rear of any one described the 3rd pedicle screw is provided with screw thread, and the rear of any one described the 3rd pedicle screw is provided with nut.

2, T shape restoring backbone fixture as claimed in claim 1, it is characterized in that: any one described end of thread body of rod axially with the axial angles that become 174 degree of described stage casing connecting rod, described stage casing connecting rod axially become 174 angles of spending with described T type end body of rod plane.

3, T shape restoring backbone fixture as claimed in claim 1, it is characterized in that: two nut profiles on any one described end of thread body of rod are all tapered, and described two nuts embed in the stern notch of first pedicle screw from the both sides of described first a pedicle screw tail end respectively.