CN201216662Y

CN201216662Y - Open type memory alloy artificial corpus vertebrae

Info

Publication number: CN201216662Y
Application number: CNU2008201028381U
Authority: CN
Inventors: 刘晖; 丁真奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-24
Filing date: 2008-06-24
Publication date: 2009-04-08
Anticipated expiration: 2018-06-24

Abstract

The utility model discloses an open-type memory alloy artificial vertebral body, which relates to an artificial vertebral body used for the spinal reconstruction of a human body. An inner sleeve net woven with memory alloy wires is fixedly connected between an upper cover and a lower cover which are woven with memory alloy wires to form a tank body provided with a window and a grid-shaped surface; an outer sleeve net woven with memory alloy wires movably covers the window of the tank body. While physically providing a support, the open type memory alloy artificial vertebral body also provides supporting structural bone grafting biologically; in addition, the artificial vertebral body is implanted via the window of the spinal nerve root, so as to avoid the combination of anterior and posterior approaches.

Description

Open type memory alloy artificial vertebral body

Technical field

This utility model relates to the medical device that a kind of human body orthopaedics is used, and particularly relates to the artificial vertebral body that a kind of human spine of being used for rebuilds.

Background technology

War in the past, after the wound, the sick and wounded methods of front and rear combined approach that usually adopt of spinal column such as spinal fracture and kyphosis deformity, serious scoliosis, tumor of spine carry out rebuilding behind backbone correcting and the lesion resection.Artificial reconstruction vertebral body is adopted the place ahead operative approach usually and assists to strut patient's two ends vertebral body bone implantation up and down by means of other operating theater instruments.Its damage surface to body is big, and complicated operation, and operating time is long.For addressing the above problem, it is 91214925.6 that China utility model patent description CN 2102102U discloses number of patent application, name is called the technical scheme of " memory alloy artificial vertebral body ", the arc artificial vertebral body that proposition is made with memorial alloy, and two sides have profile of tooth; Both sides are shaped on reinforced hole, and the stiffener holder of memorial alloy system is sleeved in this vertebral body.This memory alloy artificial vertebral body is lower than through temperature that crooked back becomes straight the recovery rapidly between posterior approach implant into body vertebral body in 0 ℃ the environment under the effect of human body temperature, and with last hypocentrum applying, lower tooth embeds sclerotin naturally on the memory alloy artificial vertebral body both sides.Do not need other operating theater instruments to assist between implantable patient's the vertebral body during operation.Both shorten operating time, reduced intravital damage surface again.The stiffener holder has improved the anti-pressure ability of rebuilding vertebral body, has avoided loosening or fracture.Because human body temperature constant temperature is rebuild vertebral body and can be out of shape between the vertebral body of implanting the patient again.But it also has following shortcoming: this memory alloy artificial vertebral body is designed to implant through preceding road, and Area of bearing is little, does not hold together to gather the structural design from the broken bone of body, artificial vertebral body and little from body bone fusion interface.Supportive structure bone grafting often need carry out at anterior approach, to improve the support strength in the place ahead.Before and after road combined operative approach often bring more wound and postoperative complication, part patient even owing to can not accept or tolerate front and rear combined approach and abandon performing the operation.

The utility model content

This utility model aims to provide a kind of open type memory alloy artificial vertebral body, and it can provide the bone grafting of the supportive structure on the biological significance in the support on physics meaning is provided, and avoids front and rear combined approach.

The technical solution of the utility model is: the interior cover net that open type memory alloy artificial vertebral body, memory alloy wire are weaved into is fixedly connected between the lower cover that loam cake that memory alloy wire weaves into and memory alloy wire weave into and forms the tank body with latticed surface that leaves window; The overcoat net that memory alloy wire is weaved into hides the window of this tank body movably.This memory alloy artificial vertebral body compresses in low temperature environment and reduces volume, enter between vertebral body the back rewarming by nerve root spinal cord window and realize strutting between vertebral body, and by window implant the patient from the broken bone of body, close window and finish supportive structure bone grafting.

In a kind of enforcement structure of optimization: described loam cake and lower cover are respectively equipped with the annular skeleton that memorial alloy is made, and two skeleton facing surfaces are respectively equipped with chute; The top of overcoat net and bottom are inserted in respectively in the corresponding chute of two skeletons slidably.The overcoat net is inserted in the corresponding chute of two skeletons, can in operation, adjusts the overcoat net easily so that expose or hide the window of this tank body.

This utility model open type memory alloy artificial vertebral body adopts the tank structure with latticed surface that leaves window, is not only realizing the support on the physics meaning between vertebral body; By the window on the tank body implant the patient from the broken bone of body, the bone grafting of the supportive structure on the biological significance is provided.The operation that this memory alloy artificial vertebral body is set in patient's body need only be taked the posterior approach mode, enters between vertebral body by nerve root spinal cord window, and operation is simple, fast.Compare with existing vertebral body reconstruction technology, have and shortened operating time; Reduced intravital damage surface; Reduce or avoid the tension injury of nerve root or the complication of cut-out; Structural preceding road is supported and has been avoided the too much stress loading of rear internal fixation system, has reduced the loosening complication that fractures of internal fixation.The full vertebra excision of the simple way of escape (posterior vertebral column resection with recent rise, PVCR) modus operandi is an example, this modus operandi mainly is to combine tumor of spine excision mode, at first remove the back line structure, by stinging to both sides except that costotransverse joint and part rib near-end, carry out subperiosteum by both sides and peel off, appear the place ahead vertebral body and it is all stung and remove, realize that by the apparatus pressurization spinal column cripetura is orthopedic again.PVCR operation at present obtains Preliminary Applications in serious scoliosis, tumor of spine and severe kyphosis deformity.This technology is because merely in the way of escape operation that undergos surgery, in order to realize that thorough vertebral resection often needs to excise many breast Spinal nerve roots, there is the complication of radiculalgia in postoperative patient in thoracic vertebra is performed the operation.In lumbar surgery, if the lumbar vertebra nerve root just only can be carried out broken bone bar bone grafting can not excise the time forwardly, and even the cripetura spinal column, there is the supportive structure bone grafting of sufficient intensity in the place ahead with regard to shortage like this, rear internal fixation machinery will be taken too much stress, and risk loosening and fracture is arranged.Part patient even occur the complication of spinal cord injury owing to the excessive cripetura of spinal cord.And adopt open type memory alloy artificial vertebral body of the present utility model, root need not denervate during operation, the bone structure that grows into of supportive structure bone grafting can combine together with the vertebral body of upper and lower in the future, reach the purpose of rebuilding vertebral body, spinal cord can cripetura, and can not produce bad complication yet.

Description of drawings

Fig. 1 is an embodiment deployed configuration of this utility model exploitation formula memory alloy artificial vertebral body sketch map.

Fig. 2 is the structural representation of Fig. 1 embodiment in the window open mode.

Fig. 3 is the structural representation of Fig. 1 embodiment at the close state.

The specific embodiment

The deployed configuration of an embodiment of this utility model open type memory alloy artificial vertebral body, as shown in Figure 1.This memory alloy artificial vertebral body is used the Ultimum Ti manufacturing fully, and it comprises loam cake 1, lower cover 2, interior cover net 3 and overcoat net 4.

The periphery of loam cake 1 is provided with the annular upper skeleton 11 that memorial alloy is made, and the lower surface of upper skeleton 11 is provided with chute.The disk shape web plate 12 that memory alloy wire is weaved into is fixed on the upper skeleton 11.

The periphery of lower cover 2 is provided with the annular lower skeleton 21 that memorial alloy is made, and the upper surface of lower skeleton 21 is provided with chute 211.The disk shape web plate 22 that memory alloy wire is weaved into is fixed on the lower skeleton 21.

The interior cover net 3 that memory alloy wire is weaved into is rolled into tubular, and its middle part has a window 31.

The tile that overcoat net that memory alloy wire is weaved into 4 is curved.

Please referring to Fig. 2.Interior cover net 3 is fixedly connected between loam cake 1 and the lower cover 2, forms a tank body with latticed surface that leaves window 31.Overcoat net 4 applies the periphery outside at this tank body.The top of overcoat net 4 is inserted in the chute of loam cake 1 upper skeleton 11 slidably; The bottom of overcoat net 4 is inserted in the chute 211 of lower cover 2 lower skeletons 21 slidably.

Overcoat net 4 is moved in the chute of the upper and

lower skeleton

21,22 of this tank body, can expose or hide the window 31 of this tank body easily.Please referring to Fig. 3.

The diameter of loam cake 1, lower cover 2, and the height of interior cover net 3 and overcoat net 4 can be designed to plurality of specifications according to the spinal nerves root window anatomical data of human body Different Individual is so that select for use during operation.

In the operation, earlier this open type memory alloy artificial vertebral body is done at low temperatures compression and handled, to reduce volume.Then, this memory alloy artificial vertebral body that compressed is entered between vertebral body by patient's nerve root spinal cord window.This memory alloy artificial vertebral body rewarming under the effect of patient temperature is realized strutting between vertebral body afterwards.By window 31 implant take off when patient's nerve decompressions are handled from the broken bone of body.At last, rotary sleeve net 4 closes window and 31 finishes the supportive bone grafting.

The above only is this utility model preferred embodiment, does not limit the scope that this utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that this utility model is contained.

Claims

1. open type memory alloy artificial vertebral body is characterized in that: the interior cover net that memory alloy wire is weaved into is fixedly connected between the lower cover that loam cake that memory alloy wire weaves into and memory alloy wire weave into and forms the tank body with latticed surface that leaves window; The overcoat net that memory alloy wire is weaved into hides the window of this tank body movably.

2. open type memory alloy artificial vertebral body according to claim 1 is characterized in that: described loam cake and lower cover are respectively equipped with the annular skeleton that memorial alloy is made, and two skeleton facing surfaces are respectively equipped with chute; The top of overcoat net and bottom are inserted in respectively in the corresponding chute of two skeletons slidably.