CN203280475U

CN203280475U - Spine spondylolysis internal fixation device

Info

Publication number: CN203280475U
Application number: CN2013203221153U
Authority: CN
Inventors: 肖嵩华; 毛克亚
Original assignee: Individual
Current assignee: Beijing Zhongnuo Hengkang Biotechnology Co ltd
Priority date: 2013-06-05
Filing date: 2013-06-05
Publication date: 2013-11-13
Anticipated expiration: 2023-06-05

Abstract

The utility model discloses a spine spondylolysis internal fixation device used for spine spondylolysis internal fixation. The spine spondylolysis internal fixation device comprises a pedicle screw and a vertebral plate hook. A screw plug is arranged on the top of the pedicle screw, a connecting arm is arranged between the pedicle screw and the screw plug, the vertebral plate hook is arranged in the connecting arm and provided with an indication module, and the connecting arm is provided with a fastening nail. A limiting block is arranged in the bottom end of the connecting arm and located on the bottom of the vertebral plate hook in the connecting arm, and a cushion block is arranged in an opening of the top end of the connecting arm. The connecting arm is provided with a sliding groove which is provided with scales. A clamping block is arranged on the vertebral plate hook outside the connecting arm, and the indication module is arranged on the sliding groove outside the connecting arm. Fastening force of the vertebral plate hook can be adjusted without replacing the vertebral plate hook, the indication module and the clamping block on the vertebral plate hook enable fastening pressurization of the spine spondylolysis internal fixation device to become more convenient and easy to quantize, and thus a spine spondylolysis internal fixation surgery is more convenient, faster and more accurate to operate.

Description

A kind of spondylolysis inner fixing device

Technical field

This utility model relates to a kind of internal fixation of spine device, especially a kind of spondylolysis inner fixing device.

Background technology

spondylolysis and spondylolithesis of the lumbar spine is that on the vertebral arch of lumbar vertebra one or both sides, the isthmus bony defect between inferior articular process is discontinuous, also claim spondylolysis or isthmus not to connect, existing internal fixation of spine device, its general structure is the Universal vertebra arch root screw top with the fixing vertebral lamina hook of plug screw, vertebral lamina hook is that regular length can only be by the degree of tightness of regulating plug screw and then the flexible length of regulating vertebral lamina hook, thereby regulate the fastening dynamics that isthmus splits, regulative mode is loaded down with trivial details, yet because vertebral lamina hook length is fixed, excessively regulate vertebral lamina hook by plug screw and can enlarge operative region, therefore when isthmus split need fastening oversize or too small, all need change vertebral lamina hook, the fastening distance of general vertebral lamina hook can only judge and can't quantize according to doctor's experience.

The utility model content

For the problem that existing loaded down with trivial details, the fastening distance of internal fixation of spine device regulative mode can't quantize, this utility model provide a kind of regulate easy, need not to change the spondylolysis inner fixing device that vertebral lamina hook, fastening convenience and fastening distance are easy to quantize.

Technical problem to be solved in the utility model is achieved through the following technical solutions:

A kind of spondylolysis inner fixing device, comprise pedicle nail and vertebral lamina hook, and described pedicle nail top is provided with plug screw, be provided with linking arm between described pedicle nail and plug screw, be provided with vertebral lamina hook in described linking arm, described vertebral lamina hook is provided with the indication slide block, and described linking arm is provided with clench nail.

Described linking arm is provided with limited block in bottom, and described limited block is located at the bottom of vertebral lamina hook in linking arm, is provided with cushion block in the port of described linking arm top.

Described linking arm is provided with chute, and described chute is provided with graduation mark.

The outer vertebral lamina hook of described linking arm is provided with clamp, and described indication slide block is located on the outer chute of linking arm.

Described cushion block place also is provided with binding groove, is provided with female thread and clench nail engagement in described binding groove.

Described clench nail one end penetrates cushion block, and expose outside cushion block other end end, and after tightening clench nail, clench nail compresses vertebral lamina hook.

The beneficial effects of the utility model are:

The vertebral lamina hook of this spondylolysis inner fixing device is fixed on the top of Universal vertebra arch root screw, self arranges telescoping mechanism vertebral lamina hook, need not to change the fastening dynamics that vertebral lamina hook is the scalable vertebral lamina hook, thereby and the indication slide block that arranges on vertebral lamina hook and clamp make the fastening pressurization of this device become convenient, also be easy to quantize to make the operation of spondylolysis internal fixation operation more convenient, accurate.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Fig. 1 is this utility model front view;

Fig. 2 is linking arm and vertebral lamina hook cutaway view partly in Fig. 1;

Fig. 3 is this utility model top view;

In figure, 1. pedicle nail, 2. vertebral lamina hook, 3. plug screw, 4. linking arm, 5. indication slide block, 6. clench nail, 7. cushion block, 8. clamp, 9. limited block.

The specific embodiment

As shown in Figure 1-Figure 3, this spondylolysis inner fixing device consists of pedicle nail 1, plug screw 3, linking arm 4, vertebral lamina hook 2, indication slide block 5, clench nail 6, clamp 8 and limited block 9.Pedicle nail 1 is preferably Universal vertebra arch root screw.

As shown in Figure 1, linking arm 4 is installed on Universal vertebra arch root screw, its top is tightened with plug screw 3, linking arm 4 inside arrange vertebral lamina hook 2, vertebral lamina hook 2 exposes in the outside end end of linking arm 4 and is fixed with clamp 8, clamp 8 is convenient to be arranged for fastening this device of pressurization, and its cross sectional shape is preferably rectangle, and the upside of linking arm 4 has indication slide block 5 to expose.

as Fig. 2-shown in Figure 3, the internal structure of linking arm 4 and vertebral lamina hook 2, linking arm 4 inner bottom are provided with limited block 9, limited block 9 matches with vertebral lamina hook 2 bottom protrusion, advance in linking arm 4 for preventing the excessive retraction of vertebral lamina hook 2, the bottom protrusion partial cross section diameter of vertebral lamina hook 2 should guarantee to contact with limited block 9, vertebral lamina hook 2 upper ends, bottom are provided with indication slide block 5, indication slide block 5 exposes and linking arm 4 upsides, indication slide block 5 is used to indicate the extension elongation of vertebral lamina hook 2, linking arm 4 inner tip ports arrange cushion block 7, cushion block 7 is used for keeping the extended position of vertebral lamina hook 2, and prevent that vertebral lamina hook 2 and linking arm 4 break away from.

The upside of linking arm 4 also offers chute, indication slide block 5 slides in chute, the both sides of chute are provided with scale, this scale can be expressed intuitively, the distance of stretch out and draw back of vertebral lamina hook 2, be provided with binding groove at cushion block 7 places of linking arm 4, machining internal thread in binding groove, be screwed into afterwards clench nail 6, clench nail 6 is used for the vertebral lamina hook 2 that locking is stretched out.

Binding groove penetrates the cushion block of linking arm 47, and be screwed into the clench nail corresponding with its shape 6 within it, when clench nail 6 is not tightened, clench nail 6 is exposed to linking arm 4 outsides, clench nail 6 bottoms do not contact with vertebral lamina hook 2 in cushion block 7, when clench nail 6 was tightened, clench nail 6 compressed vertebral lamina hook 2, and then made vertebral lamina hook 2 fixing.

Should be understood that, the above-mentioned specific embodiment of the present utility model only is used for exemplary illustration or explains principle of the present utility model, and does not form restriction of the present utility model.Therefore, in the situation that do not depart from any modification that spirit and scope of the present utility model make, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.In addition, this utility model claims are intended to contain whole variations and the modification in the equivalents that falls into claims scope and border or this scope and border.

Claims

1. spondylolysis inner fixing device, comprise pedicle nail (1) and vertebral lamina hook (2), it is characterized in that: described pedicle nail (1) top is provided with plug screw (3), be provided with linking arm (4) between described pedicle nail (1) and plug screw (3), be provided with vertebral lamina hook (2) in described linking arm (4), described vertebral lamina hook (2) is provided with indication slide block (5), and described linking arm (4) is provided with clench nail (6).

2. spondylolysis inner fixing device according to claim 1, it is characterized in that: described linking arm (4) is provided with limited block (9) in bottom, described limited block (9) is located at the bottom of the interior vertebral lamina hook of linking arm (4) (2), is provided with cushion block (7) in the port of described linking arm (4) top.

3. spondylolysis inner fixing device according to claim 1, it is characterized in that: described linking arm (4) is provided with chute, and described chute is provided with graduation mark.

4. spondylolysis inner fixing device according to claim 3 is characterized in that: the outer vertebral lamina hook (2) of described linking arm (4) is provided with clamp (8), and described indication slide block (5) is located on the outer chute of linking arm (4).

5. spondylolysis inner fixing device according to claim 2, it is characterized in that: described cushion block (7) locates also to be provided with binding groove, is provided with female thread and clench nail (6) engagement in described binding groove.

6. spondylolysis inner fixing device according to claim 5, it is characterized in that: described clench nail (6) one ends penetrate cushion block (7), expose outside cushion block (7) other end end, and after tightening clench nail (6), clench nail (6) compresses vertebral lamina hook (2).