CN201558198U

CN201558198U - Memory alloy anterior lumbar interbody fusion device

Info

Publication number: CN201558198U
Application number: CN2009201443302U
Authority: CN
Inventors: 孙正义; 达国祖
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-24
Filing date: 2009-11-24
Publication date: 2010-08-25
Anticipated expiration: 2019-11-24

Abstract

The utility model provides a memory alloy anterior lumbar interbody fusion device which comprises a main body and anti-fall ratchets, wherein the main body is a streamlined flat round hollow cylinder, the front end of the main body is the front support part, the rear end of the main body is the rear support part, the upper and the lower surfaces of the main body are streamlined obtuse-angle rectangles, rectangular bone-grafting holes are arranged on the upper and the lower surfaces respectively and benefit the bone graft fusion, the anti-fall ratchets are arranged on the two sides of the upper and the lower surfaces and at the two margins of the bone-grafting holes, and a holding hole is arranged at the front end of the main body. The memory alloy anterior lumbar interbody fusion device takes full advantage of the recoverable shape deformation characteristic of the memory alloy, is made from a tube material or made by bending a plate material with simple process, is easy to be placed in the intervertebral space as the streamlined cylindrical structure is liable to deform, and provides strong support force after shape recovery. During the surgery, the memory alloy anterior lumbar interbody fusion device is convenient to use and fixed firmly. With the reliability of bone fusion, the memory alloy anterior lumbar interbody fusion device is widely applied to the surgery of the patients with lumbar spine instability and spondylolisthesis after lumbar discectomy, and has good economic and social benefits.

Description

The preceding road of memorial alloy lumbar vertebra fusion device

Technical field

This utility model relates to a kind of medical apparatus and instruments, particularly surgery, orthopaedics, spinal surgery is used to implant the preceding road of Intrapyramidal a kind of memorial alloy lumbar vertebra fusion device.

Background technology

Invasive lumbar fusion device on the market has the cylindric Invasive lumbar fusion device SMA-cage of memorial alloy, fusion device between the box lumbar vertebra of metal species Invasive lumbar fusion device: walkman at present; Cylindric screw thread Invasive lumbar fusion device; And fusion device etc. between the inflatable lumbar vertebra; Non-metal kind Invasive lumbar fusion device: HCLF cage; The PLA fusion device; The preceding road of Solis lumbar vertebra fusion device etc.The problem that above fusion device exists: the biodegradable person of nonmetallic materials class fusion device, volume is big, the bone grafting amount is few, and the alternative speed heterogeneity of degraded may cause support strength to descend and merge and fail; Nonmetal non-degradable material is similar to the moulding of metal material fusion device, function is close, is box or the cylindrical thread structure, and support force is powerful, and plasticity is little, implants need enlarge intervertebral space often.The bone grafting hole is less, and the bone grafting amount is few, can cause merging failure and cause pseudarthrosis.

The utility model content

This utility model will solve above-mentioned problems of the prior art exactly, make full use of the warpage of memorial alloy---recoverable characteristics, help SMA cage in conventional and Minimally Invasive Surgery, the Invasive lumbar fusion device under the prerequisite of less destruction terminal plate of vertebral body is inserted operation; Provide a kind of profile to meet human body intervertebral concave-concave shape facility, the bone grafting hole is bigger, helps increasing the bone grafting amount, makes firm bone fusion become the possible preceding road of a kind of memorial alloy lumbar vertebra Invasive lumbar fusion device.

Technical problem of the present utility model adopts following technical proposals to solve:

The preceding road of a kind of memorial alloy lumbar vertebra fusion device, comprise main body and the anti-ratchet of pouring out, described main body is the oblate hollow tubular of a streamlined, body front end is preceding support portion, body rear is the support portion, back, and the above and below of main body is streamlined obtuse angle rectangle, is respectively equipped with the rectangle bone grafting hole that is beneficial to bone-graft fusion on the above and below, the two edges in the both sides of above and below and bone grafting hole are provided with prevents pouring out ratchet, and body front end is established one and grasped the hole.

Adopt described main body and preceding support portion thereof and support portion, back has the temperature memory function, and the memory alloy material that has excellent biological compatibility is simultaneously made.

Described memory alloy material is the Ti-Ni marmem material.

This utility model makes full use of the warpage of memorial alloy---recoverable characteristics, help SMAcage in conventional and Minimally Invasive Surgery, and the Invasive lumbar fusion device under the prerequisite of less destruction terminal plate of vertebral body is inserted operation; Anatomical SMA cage profile meets human body intervertebral concave-concave shape facility, and the anti-ratchet of pouring out that it is distributed in the streamlined edge helps fusion device and closely contacts and fix with interpyramidal; This fusion device uses tubing to be made into the oblate hollow cylinder main body of streamlined, and the rectangle bone grafting hole of its above and below is bigger, helps increasing the bone grafting amount, makes firm bone fusion become possibility.This utility model is selected the memory alloy material that has the temperature memory function in the prior art, has excellent biological compatibility simultaneously for use, as Ti-Ni marmem, and safe in vivo, nontoxic, nothing rejection.The art shapes of making or bending with sheet material with tubing is simple, the easily deformable intervertebral space of inserting of streamlined tubular structure, and support force is powerful after the complex.Easy to use in operation, fixation.Bone merges reliable, can be widely used in: in lumbar vertebra instability person, the slight slippage of lumbar vertebra, unstable patient's the operation, have good economic and social benefit behind the lumbar diskectomy.

Description of drawings

Fig. 1 is this utility model structural representation;

Fig. 2 is this utility model vertical view;

Fig. 3 is this utility model left view.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is described in further detail:

The preceding road of a kind of memorial alloy lumbar vertebra fusion device, comprise main body 1 and the anti-ratchet 5 of pouring out, main body 1 by tubing make the oblate hollow tubular distortion of streamlined----the complex main body, main body 1 front end is preceding support portion 3, main body 1 rear end is support portion 6, back, on the main body 1, below 4 be streamlined obtuse angle rectangle, last, below be respectively equipped with the rectangle bone grafting hole 2 that is beneficial to bone-graft fusion on 4, on, below have on the two edges in 4 both sides and bone grafting hole 2 and meet the anti-ratchet 5 of pouring out that concave-concave is dissected between vertebral body, main body 1 front end is provided with the perforate that a bone grafting is used, and the double simultaneously instrument of doing when inserting fusion device grasps hole 7.Adopt main body 1 and preceding support portion 3 thereof and support portion, back 6 has the temperature memory function, the memory alloy material that has excellent biological compatibility simultaneously, as: the Ti-Ni marmem material, have distortion and be beneficial to insert enough supporting roles after intervertebral space and the complex, its bone grafting hole is beneficial to bone-graft fusion more greatly.

Manufactured materials of the present utility model is selected for use has the temperature memory function in the prior art, the material that has excellent biological compatibility simultaneously, and as Ti-Ni marmem, safe in human body, nontoxic in the clinical practice, nothing rejection.

Claims

1. the preceding road of memorial alloy lumbar vertebra fusion device, comprise main body and the anti-ratchet of pouring out, it is characterized in that described main body (1) is the oblate hollow tubular of a streamlined, main body (1) front end is preceding support portion (3), main body (1) rear end is support portion (6), back, the above and below (4) of main body (1) is streamlined obtuse angle rectangle, on above and below (4), be respectively equipped with the rectangle bone grafting hole (2) that is beneficial to bone-graft fusion, the two edges of the both sides of above and below (4) and bone grafting hole (2) are provided with prevents pouring out ratchet (5), and main body (1) front end is established one and grasped hole (7).

2. the preceding road of a kind of memorial alloy lumbar vertebra according to claim 1 fusion device, it is characterized in that described main body (1) and preceding support portion (3) thereof and support portion, back (6) employing have the temperature memory function, the memory alloy material that has excellent biological compatibility is simultaneously made.

3. the preceding road of a kind of memorial alloy lumbar vertebra according to claim 2 fusion device is characterized in that described memory alloy material is the Ti-Ni marmem material.