CN2075949U - Internal fixator for radix arcus vertebrae spinal column - Google Patents
Internal fixator for radix arcus vertebrae spinal column Download PDFInfo
- Publication number
- CN2075949U CN2075949U CN 90218983 CN90218983U CN2075949U CN 2075949 U CN2075949 U CN 2075949U CN 90218983 CN90218983 CN 90218983 CN 90218983 U CN90218983 U CN 90218983U CN 2075949 U CN2075949 U CN 2075949U
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- screw
- spinal column
- internal fixation
- drift bolt
- ratchet
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Abstract
The utility model relates to a device that flat-headed cylinder screws (1), (2) which are provided with screw threads and are respectively matched with T-shaped blocks (4), (5) which are provided with screw-thread holes with positive and negative teeth, locking type screw nuts (6), (7) which are provided with positive and negative teeth and a couple of ratchet washers (8). T-shaped threaded rods (12) are respectively matched with screw threading blocks (9) provided with vertebral arch pedicle screws (10). On the occasion of the surgical operation, four screws are inserted into the vertebral body on the upper and lower vertebrae of the injured vertebral-column to control the three-column composite structures of the front, the middle and the rear vertebrae, and three-dimension fixation is achieved by a fixture for internal fixation of the vertebral-column; as a result, the diseases such as the thoracic and lumbar vertebra fracture, the vertebral-column malformation, the excision for the bone tumor, etc., can be effectively treated.
Description
This utility model relates to a kind of medical apparatus and instruments of orthopaedics, and it is specially adapted to the internal fixation of spinal column.
In recent years, to the treatment of spinal injury, advocating the early recovery sagittal canal diameter both at home and abroad, remove the compressing to spinal cord, implement the internal fixation of spine reattachment surgery, is to prevent one of important channel that spinal cord damages again.
Since 1973, be used for the fixed apparatus of spinal column, the Haller's organ tool is arranged, Knott rod, Weiss spring, Merigue-Williams steel plate, Jacobs latch hook spinal rod, Lugue or Ha Shi segmental spinal instrumentation.Use these apparatuses, operation wound is big, expose that vertebra is many, easily to influence canalis spinalis be to cause Spinal Cord, and complication is many, the poor stability of holder, shortcoming such as it is undesirable to reset.
Nineteen eighty-two, Switzerland Dick designs a kind of pedicle of vertebral arch internal fixation device, has solved the problems referred to above basically.
Dick spinal column internal fixation device according to the SYNTHES trade mark that provides of Switzerland internal fixation research association (ASIF) in 1987, " three posts " composite construction of vertebra before, during and after the SchanZ screw may command, it is fixing to reach completely " three-dimensional " with holder, improved the stability of holder greatly, but through clinical practice, also there is following point in the Dick apparatus.
1, the oblate post screw rod of Dick spinal column internal fixation device is the unidirectional screw rod of full thread, must regulate a pair of slide block during operation, could correctly carry out, promptly strut or compress the distance of two slide blocks on screw rod being damaged resetting of vertebra, complicated operation prolongs operating time.
2, the Dick apparatus adopts slide block, pressure plate structure, and the SchanZ screw embeds the pressing plate that semicylindrical opening is arranged, and relies on the fixing of slide block, could hold-down screw, have looseningly slightly in case slide block is fixing, and screw presents unstability.
3, long-armed SchanZ screw is convenient in operation process the resetting of vertebral body, but surplus arm must clip after resetting, and has both wasted metal material, increases the difficulty that screw takes out again.
This utility model is the improvement to the Dick spinal column internal fixation device.
The technical solution of the utility model is the reverse-flighted screw that positive and negative pitch thread is arranged for hexagonal cylinder two in the middle of the unidirectional screw rod of the full thread of holder is made into; The fixing pressing plate of SchanZ screw is changed into the drift bolt piece; Slide block has the T-shaped piece in positive and negative pitch thread hole instead; Long-armed SchanZ screw is changed into the pedicle of vertebral arch short screw.
Major advantage of the present utility model is simple to operate, and wound is little, and complication is few; The satisfaction that resets, fixing reliable, help union of fracture, promote to merge, deformity is corrected, and alleviates canalis spinalis pressure effectively, and the activity of postoperative spinal column is not placed restrictions on, and helps rehabilitation.
Fig. 1 is a pedicle of vertebral arch spinal column internal fixation device front view
Fig. 2 is a pedicle of vertebral arch spinal column internal fixation device left view
Fig. 3 is a T-shaped piece three-face view
Fig. 4 is two views of piece of threading a needle
Fig. 5 is the pedicle screw sketch map
Below in conjunction with accompanying drawing this utility model is further described.
Pedicle of vertebral arch spinal column internal fixation device: be T-shaped piece (4), (5) that are equipped with positive and negative pitch thread hole on the oblate post screw rod (1) of positive and negative pitch thread, (2) respectively having; The locking-type nut (6) of positive and negative pitch thread, (7); A pair of ratchet washer (8); Be equipped with drift bolt piece (9) respectively on T-shaped piece screw rod (12), pedicle screw (10) is arranged on the drift bolt piece, this apparatus is made with Ultra-low carbon chromium nickel molybdenum austenitic stainless steel.
During operation,, four screw pedicles are inserted vertebral body being damaged on the upper and lower vertebra of vertebra, " three posts " composite construction of vertebra before, during and after the control, it is fixing to reach " three-dimensional " with the spinal fixation device, thereby treats disease such as lumbar vertebra compression fracture effectively.
The reverse-flighted screw of positive and negative pitch thread of the present utility model (1), (2) are an integral body, and there is hexagonal cylinder regulating block (3) centre.To being damaged resetting of spinal column, as long as both forward and reverse directions is stirred the hexagonal cylinder (3) of screw rod, a pair of T-shaped piece (4), (5) of both sides are strutted on screw rod or compress, regulate the distance between vertebra, reach satisfied and reset, and fix by two pairs of positive and negative tooth locking-type nuts (6), (7), the locking-type nut is to have the axle collar on nut, can press from both sides flatly on oblate post screw rod, have locking effect.
T-shaped piece of the present utility model (4), (5) have positive and negative pitch thread hole, can do 360 ° of rotations around holder screw rod (1), (2).When operation, rotational fixation device screw rod just can be adjusted in spinal column distance and position longitudinally arbitrarily; T-shaped piece screw rod (12) is arranged on the T-shaped piece, and locking-type nut (6) can connect and fixing drift bolt piece (9), and the T-shaped piece has radial ratchet (13), (14) respectively on the axial plane of holder screw rod and T-shaped piece screw rod.
Drift bolt piece of the present utility model (9), can do 360 ° of rotations around T-shaped piece screw rod (12), spinal column vertically on adjusting position arbitrarily, make the screw afterbody (21) of inserting vertebral body be inserted in drift bolt hole (17), put release link and reset, again the orientation of scalable pedicle screw (10), reach satisfied resetting, drift bolt piece (9) is characterised in that drift bolt hole (17), and the afterbody of screw (10) (21) after drift bolt hole (17), directly is fixed on the drift bolt piece.Like this, in case that the nut (6) on the T-shaped piece screw rod has slightly is loosening, screw (10) still keeps steadiness on the drift bolt piece.
Radial ratchet (13), (14) of this utility model on two axial planes of T-shaped piece are mutually vertical engaging structure with ratchet washer (8) and drift bolt piece ratchet (15), to increase the degree of freedom that the T-shaped piece is vertically regulated at spinal column at the degree of freedom and the drift bolt piece of spinal column lateral adjustments, fix by ratchet location and locking-type nut, improve the stability of inner fixer.
Pedicle screw of the present utility model (10) has two kinds of patterns of A, B, and they all have a threaded portion (18), is symmetrical spongiosa screw thread, ridge wedge angle degree little (about 25 °), and screw thread is dark, and wide flat pressure support surface (16) is arranged; (18) have a circular cone post (19) with shoulder (20) centre to the A screw in the threaded portion, prevent bending to improve screw intensity, screw afterbody (21) has regular screw threads, be convenient to common hex nut (11) screw is fixed on the drift bolt piece, the end face of screw afterbody (21) has groove (22), makes things convenient for inserting and taking out of screw, screw afterbody (21) but the socket release link, to increase the arm of force, take off after the satisfaction of waiting to reset, wait until the back and use.The difference of A, Type B screw thread portion (18) is: the A type is half pitch thread, and Type B is conical full pitch thread.
The pedicle of vertebral arch spinal column internal fixation device generally is applicable to lumbar vertebra compression fracture, sacral fracture, ligament rapture and vertebrae plate resection, spinal column reach and kyphosis deformity, various disc degeneration diseases, the internal fixation of spine in the operation such as bone tumour resection.
Claims (6)
1, a kind of spinal column internal fixation device is made up of nut, screw rod, slide block, pressing plate, screw, it is characterized in that having reverse-flighted screw (1), (2) of positive and negative pitch thread, the T-shaped piece (4) in positive and negative pitch thread hole, (5), drift bolt piece (9); Pedicle screw (10).
2, spinal column internal fixation device according to claim 1, reverse-flighted screw (1), (2) that it is characterized in that positive and negative pitch thread are an integral body, there is hexagonal cylinder regulating block (3) centre.
3, spinal column internal fixation device according to claim 1 and 2 is characterized in that drift bolt piece (9) has drift bolt hole (17), and pedicle screw (10) directly is fixed on the drift bolt piece through nail hole (17), and ratchet (15) is arranged on the drift bolt piece.
4, spinal column internal fixation device according to claim 1 and 2 is characterized in that T-shaped piece (3), (4) have radial ratchet (13), (14) respectively on the axial plane of holder screw rod and T-shaped piece screw rod.
5,, it is characterized in that the ratchet (13), 14 on two axial planes of T-shaped piece (4), (5) according to claim 3 or 4 described spinal column internal fixation devices), form vertical engaging structure with ratchet washer (8) and drift bolt piece ratchet (15).
6, spinal column internal fixation device according to claim 1, it is characterized in that pedicle screw (10) has two kinds of patterns of A, B, they all have a threaded portion (18), be symmetrical spongiosa screw thread, ridge wedge angle degree is little, screw thread is dark, wide flat pressure support surface (23) is arranged: A type screw has a circular cone post (19) between threaded portion (18) and shoulder (20), screw afterbody (21) has regular screw threads, groove (22) is arranged on the end face, the difference of the threaded portion of A, Type B screw (18) is: the A type is half pitch thread, and Type B is the full pitch thread of circular cone post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90218983 CN2075949U (en) | 1990-09-03 | 1990-09-03 | Internal fixator for radix arcus vertebrae spinal column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90218983 CN2075949U (en) | 1990-09-03 | 1990-09-03 | Internal fixator for radix arcus vertebrae spinal column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2075949U true CN2075949U (en) | 1991-05-01 |
Family
ID=4897719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90218983 Withdrawn CN2075949U (en) | 1990-09-03 | 1990-09-03 | Internal fixator for radix arcus vertebrae spinal column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2075949U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374470B (en) * | 2006-01-24 | 2011-01-05 | 纽卡迪亚6有限责任公司 | Methods for determining pedicle base circumference, pedicle isthmus and center of the pedicle isthmus |
| CN102440832A (en) * | 2010-10-08 | 2012-05-09 | 宝楠生技股份有限公司 | Device for fastening and fixing spinous process of spine |
| CN103519874A (en) * | 2013-10-22 | 2014-01-22 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
| CN103800059A (en) * | 2014-01-07 | 2014-05-21 | 创生医疗器械（中国）有限公司 | Spine internal fixation adjustable transverse connecting device |
| CN107080581A (en) * | 2016-02-16 | 2017-08-22 | 宋若怡 | Elastic internal fixation system and pressure-adjustable hold-down bars |
| CN107080582A (en) * | 2016-02-16 | 2017-08-22 | 宋若怡 | Flexible spinal fixed system and pressure-adjustable hold-down bars |
| CN115568921A (en) * | 2022-09-01 | 2023-01-06 | 广东施泰宝医疗科技有限公司 | A spinal distraction device |
-
1990
- 1990-09-03 CN CN 90218983 patent/CN2075949U/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374470B (en) * | 2006-01-24 | 2011-01-05 | 纽卡迪亚6有限责任公司 | Methods for determining pedicle base circumference, pedicle isthmus and center of the pedicle isthmus |
| CN102440832A (en) * | 2010-10-08 | 2012-05-09 | 宝楠生技股份有限公司 | Device for fastening and fixing spinous process of spine |
| CN103519874A (en) * | 2013-10-22 | 2014-01-22 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
| CN103519874B (en) * | 2013-10-22 | 2017-02-08 | 宋西正 | External fixing device for minimally invasive spine leverage reduction |
| CN103800059A (en) * | 2014-01-07 | 2014-05-21 | 创生医疗器械（中国）有限公司 | Spine internal fixation adjustable transverse connecting device |
| CN103800059B (en) * | 2014-01-07 | 2016-01-20 | 创生医疗器械（中国）有限公司 | Internal fixation of spine is adjustable horizontal connect device |
| CN107080581A (en) * | 2016-02-16 | 2017-08-22 | 宋若怡 | Elastic internal fixation system and pressure-adjustable hold-down bars |
| CN107080582A (en) * | 2016-02-16 | 2017-08-22 | 宋若怡 | Flexible spinal fixed system and pressure-adjustable hold-down bars |
| CN115568921A (en) * | 2022-09-01 | 2023-01-06 | 广东施泰宝医疗科技有限公司 | A spinal distraction device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |