CN211131545U - Computer aided design individualized lumbar vertebra interbody fusion cage - Google Patents
Computer aided design individualized lumbar vertebra interbody fusion cage Download PDFInfo
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- CN211131545U CN211131545U CN201921114570.8U CN201921114570U CN211131545U CN 211131545 U CN211131545 U CN 211131545U CN 201921114570 U CN201921114570 U CN 201921114570U CN 211131545 U CN211131545 U CN 211131545U
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Abstract
The utility model belongs to the orthopedic ware field of bone surgery osteotomy, especially relate to individualized lumbar vertebrae interbody fusion cage of computer aided design, rebuild patient's lumbar vertebrae model, measure position parameter and fusion cage lower centrum parameter that need implant interbody fusion cage in patient's lumbar vertebrae model; designing the shape parameters of the main body of the interbody fusion cage by using modeling software and taking the shape of the normal vertebral body as reference and the measured interbody size parameters of the patient as standard; a positioning wing is designed on the fusion cage main body by combining the size parameters of the vertebral body under the position of the fusion cage; two nail holes are respectively designed on the main body and the positioning wings of the interbody fusion cage, and the fusion cage is fixed without notches; the main body adopts a reticular structure and a solid structure which are arranged in a staggered way; adopt 3D printing technique preparation the beneficial effects of the utility model are that: use the utility model discloses the lumbar vertebrae interbody fusion cage of preparation, the volume is moderate, and position and fixed mode are accurate reliable, have avoided the incision of way of escape pedicle of vertebral arch nail to put into, have realized that the wicresoft of operation changes, accurate, the expense is low, recovery time is short.
Description
Technical Field
The utility model belongs to the field of medical equipment, especially, relate to-individualized lumbar vertebrae interbody fusion cage of computer aided design.
Background
The good incidence parts of lumbar disc herniation are most common as L4-5 intervertebral discs, account for 58% -62%, L5-S1 times, account for 38% -44%, the rare part of lumbar disc herniation occurs in intervertebral discs above L3-4, 2 intervertebral disc patients account for 5% -10% at the same time, L5-S1 intervertebral discs are the 2 intervertebral discs at the lowest side of the whole spine, are the parts with most concentrated stress of the whole body, bear the largest pressure, have larger activity of lumbar vertebrae, have the largest traction force to the lower intervertebral discs and especially the fiber ring when the spine moves in various directions, because the sacral vertebrae are fixed and do not participate in the spinal motion, the sacral vertebrae do not generate corresponding coordination and buffering actions during the spinal motion, and the motion of each section on the spine is finally concentrated on the 2 lowest movable sections, therefore, L4-5 intervertebral disc injuries have the largest chance.
The lumbar vertebra fusion has appeared for nearly one hundred years, and methods of spinal posterior fusion are respectively reported by A L BEE and HIBBS in 1911. with continuous improvement and development of surgical approaches, instruments and bone grafting materials, the lumbar vertebra fusion is continuously developed and perfected, becomes a basic technology for treating diseases such as spinal degenerative diseases, deformity, trauma, tuberculosis, tumor and the like, and is generally considered to be satisfactory in curative effect at present through clinical verification for many years.
The fusion cage in clinical application at present is divided into a horizontal cylinder, a square, a vertical cylinder, a bullet head and the like according to the shape. The commonly used surgery includes posterior-lateral (transverse process) interbody fusion, posterior intervertebral fusion, transforaminal interbody fusion, anterior lumbar interbody fusion, 360 ° fusion, etc. Although the choice of the fusion type and fusion device is various, the ideal lumbar fusion should meet the following requirements as much as possible: the approach is simple, and the operative field is well exposed; the fusion rate is high, the intervertebral height is easy to recover, and the physiological curvature of the spine is kept; the internal fixation is convenient, stable and reliable; the operation effect is good.
However, most of the existing commonly used interbody fusion cages have the distraction function, and after the intervertebral fusion cages are implanted, the pedicle screws are required to be placed in the posterior direction to complete fixation, so that the physiological curvature of the spine cannot be kept; the fixation is inconvenient, and the stability and reliability are poor; in addition, the vertebral canal contains a plurality of nerve vessels, so that the fixation risk is extremely high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of placing the interbody fusion cage in the front way in the prior art and the size fixation of the existing general lumbar interbody fusion cage, the existing lumbar interbody fusion cage needs to be fixed by a pedicle screw during implantation, the wound is large, and the recovery is slow. The utility model provides an individualized lumbar vertebrae interbody fusion cage through the three-dimensional reconstruction to patient's lumbar vertebrae CT data, through measuring intervertebral length, width and the height of implanting the fusion cage position to and length, width and the height of the normal centrum of fusion cage upper end or lower extreme. The operation range is determined according to the specific disease characteristics, and a personalized intervertebral fusion cage is designed. Aiming at the anatomical characteristics of the lumbar vertebra and surrounding soft tissues of a patient, the lumbar interbody fusion cage completely consistent with the size and the shape of an individual patient is designed by combining computer aided design and a 3D printing technology, and the guide holes are reserved in the fusion cage for placing nails for fixation, so that the risk of damaging the vertebral canal and the posterior pedicle fixed incision are avoided, and minimally invasive accurate treatment is realized.
The technical scheme of the utility model: the computer-aided design individualized lumbar interbody fusion cage is characterized by comprising an interbody fusion cage main body and positioning wings, wherein the upper ends of the positioning wings are connected with the lower end of the fusion cage main body, and the lower ends of the positioning wings are attached to the surface of a lower vertebral body; two nail holes are respectively designed on the main body and the positioning wings of the intervertebral fusion device, and the two nail holes are respectively arranged in a crossed mode.
Preferably, the center of the fusion cage main body adopts a hollow structure, and the outer surface of the fusion cage main body adopts a reticular structure and a solid structure which are arranged in a staggered way;
preferably, the mesh structure adopts a polygonal mesh.
Preferably, the polygonal mesh is an even-numbered mesh;
preferably, the solid structures are respectively arranged at two sides and the upper and lower ends of the fusion cage main body;
preferably, the nail cap position of the nail hole adopts a non-notch structure, and the non-notch structure adopts a counter bore;
preferably, one or more pairs of nail holes are arranged on the intervertebral fusion device body and the positioning wings;
preferably, the interbody cage body is provided with auxiliary fixing holes;
preferably, the positioning wing is provided with an auxiliary fixing hole.
The utility model has the advantages that: use the utility model discloses the lumbar vertebrae interbody fusion cage of preparation, the volume is moderate, and position and fixed mode are accurate reliable, and the incision of having avoided back way pedicle of vertebral arch nail is put into, has realized the wicresoft of operation, and the expense is low, recovery time is short, and the complication is relatively less, and the surface adopts network structure and the crisscross design entity of entity structure to guarantee the intensity of fusing the ware, and network structure is convenient for bone tissue's length goes into, strengthens the fixed of fusing the ware.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of the computer-aided design personalized lumbar interbody fusion cage of the present invention;
FIG. 2 is a rear view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a right side view of FIG. 1;
fig. 5 is a schematic structural diagram of the computer-aided design personalized lumbar interbody fusion cage of embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of the computer-aided design personalized lumbar interbody fusion cage of embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of the computer-aided design personalized lumbar interbody fusion cage of embodiment 4 of the present invention;
fig. 8 is a schematic structural diagram of the computer-aided design personalized lumbar interbody fusion cage of embodiment 5 of the present invention;
fig. 9 is a right side view of fig. 8.
In the figure, 1, an intervertebral fusion cage main body, 2, a positioning wing, 3, a nail hole, 4, a through hole, 5, a net structure, 6, a solid structure, 7 and an auxiliary fixing hole.
Detailed Description
An embodiment of the present invention will be described with reference to the accompanying drawings. The computer aided design method for designing and making individualized lumbar intervertebral fusion device includes the following steps:
step 1: reconstructing a lumbar vertebra model of a patient, which comprises an abnormal vertebral body and vertebral body models at the upper end and the lower end;
step 2: measuring the position parameters of the interbody fusion cage to be implanted in the lumbar model of the patient and the parameters of the lower vertebral body of the fusion cage;
and step 3: designing the shape parameters of the main body of the interbody fusion cage by using modeling software and taking the shape of the normal vertebral body as reference and the measured interbody size parameters of the patient as standard;
and 4, step 4: designing a positioning wing on the fusion cage main body by combining the size parameters of the vertebral body under the position of the fusion cage;
and 5: two nail holes are respectively designed on the main body and the positioning wings of the intervertebral fusion cage, and the two nail holes are respectively arranged in a crossed manner;
step 6: the fusion cage is fixed in a non-incisional design mode, so that damage to surrounding soft tissues is avoided;
and 7: the fusion cage main body is designed in a mesh structure and a solid structure in a staggered mode;
and 8: the manufacturing process adopts a 3D printing technology, and the material is metal.
In the step 1, reconstructing the patient lumbar model further comprises a sacrum model, specifically, collecting tomography CT data of the complete lumbar of the patient, storing the data in a DICOM image format, and establishing a three-dimensional lumbar model through three-dimensional reconstruction software.
The reconstruction of the patient lumbar model in step 1 also includes a sacral model.
Measuring the position parameters of the intervertebral fusion device to be implanted in the lumbar model of the patient, including the length, the width and the height of the intervertebral;
parameters of the intervertebral fusion cage to be implanted in the lumbar model of the patient comprise the length, the width and the height of the lower vertebral body of the fusion cage.
And 3, adopting the mimics reconstruction software for the modeling software in the step 3.
In the step 3, the overall parameters of the interbody fusion cage body are designed, specifically, the length and the width of the interbody fusion cage body are respectively 5-10 mm smaller than the length and the width of the interbody, and the height range of the high fusion cage body can float up and down for 3mm on the basis of the measured height.
And 8, adopting titanium alloy as the metal.
The computer-aided design individualized lumbar interbody fusion cage is characterized by comprising an interbody fusion cage body 1 and a positioning wing 2, wherein the interbody fusion cage body 1 and the positioning wing 2 are integrally formed, the upper end of the positioning wing 2 is connected with the lower end of the fusion cage body 1, and the lower end of the positioning wing 2 is attached to the surface of a lower vertebral body; nail holes 3 are arranged on the intervertebral fusion device main body 1 and the positioning wings 2.
The center of the fusion cage body 1 adopts a hollow structure, and the center of the fusion cage body 1 is provided with a through hole 4.
The outer surface of the fusion cage body adopts a reticular structure 5 and a solid structure 6 which are arranged in a staggered way.
The nail holes 3 are arranged in pairs, and the nail holes 3 in the pairs are arranged in a crossing manner.
The net structure 5 adopts polygonal meshes;
the polygonal mesh is an even-numbered mesh.
The solid structures 6 are respectively arranged at two sides and the upper end and the lower end of the fusion cage main body.
The nail cap position of the nail hole 3 adopts a non-notch structure, and the non-notch structure adopts a counter bore.
The main body 1 and the positioning wings 2 of the intervertebral fusion device are provided with 1 pair or a plurality of pairs of nail holes.
The interbody fusion cage body 1 is provided with auxiliary fixing holes 7, and the auxiliary fixing holes 7 are used for assisting the fixation of the interbody fusion cage body 1.
The positioning wing 1 is provided with an auxiliary fixing hole 7 which is used for fixing the positioning wing 1 and the lower vertebral body.
Example 1
The method for designing and manufacturing the personalized lumbar interbody fusion cage by computer-aided design is characterized by comprising the following steps of:
step 1: reconstructing a lumbar vertebra model of a patient, which comprises an abnormal vertebral body, upper and lower vertebral bodies and a sacrum if necessary;
step 2: measuring position parameters of the intervertebral fusion device to be implanted in the model, including the length, width and height of the intervertebral, and measuring the length, width and height of the lower vertebral body of the fusion device;
and step 3: designing the shape of the main body of the intervertebral fusion cage by using modeling software, taking the shape of a normal vertebral body as a reference and taking the measured intervertebral size parameters of a patient as a standard, wherein the length and the width of the fusion cage are respectively 5-10 mm smaller than the length and the width of the intervertebral, and the height range can float up and down for 3mm on the basis of the measured height size;
and 4, step 4: designing a positioning wing of the fusion cage according to the size parameters of the lower vertebral body at the position of the fusion cage to realize the position fixation when the vertebral body is implanted, wherein the upper end of the positioning wing is connected with the fusion cage, and the lower end is attached to the surface of the lower vertebral body;
and 5: two nail holes are respectively designed on the main body and the positioning wings of the intervertebral fusion device in a crossed mode, and the nail holes are required to penetrate into vertebral pedicle and can not damage the vertebral canal;
step 6: the fusion cage is fixed in a non-incisional design mode, so that damage to surrounding soft tissues is avoided;
and 7: the main body of the fusion cage is designed in a staggered way by a mesh structure and a solid structure, the solid ensures the strength of the fusion cage, and the mesh structure is convenient for bone tissues to grow in and enhances the fixation of the fusion cage.
And 8: and 3D printing technology is adopted during processing, and the material is metal titanium alloy.
The computer-aided design individualized lumbar interbody fusion cage is characterized by comprising an interbody fusion cage body 1 and a positioning wing 2, wherein the interbody fusion cage body 1 and the positioning wing 2 are integrally formed, the upper end of the positioning wing 2 is connected with the lower end of the fusion cage body 1, and the lower end of the positioning wing 2 is attached to the surface of a lower vertebral body; nail holes 3 are arranged on the intervertebral fusion device main body 1 and the positioning wings 2.
The center of the fusion cage body 1 adopts a hollow structure, and the center of the fusion cage body 1 is provided with a through hole 4.
Example 2
The technical scheme of the embodiment 1 also comprises the following technical scheme:
the outer surface of the fusion cage body adopts a reticular structure 5 and a solid structure 6 which are arranged in a staggered way.
The nail holes 3 are arranged in pairs, and the nail holes 3 in the pairs are arranged in a crossing manner.
The net structure 5 adopts polygonal meshes;
the polygonal mesh is an even-numbered mesh.
The solid structures 6 are respectively arranged at two sides and the upper end and the lower end of the fusion cage main body.
Example 3
Besides the technical scheme of the embodiment 2, the method also comprises the following technical scheme:
the nail cap position of the nail hole 3 adopts a non-incisional structure, and the non-incisional structure adopts a counter bore, so that the damage to surrounding soft tissues is avoided.
The intervertebral fusion device main body 1 and the positioning wings 2 are both provided with 1 pair of nail holes.
The positioning wing 2 is provided with 1 pair of auxiliary fixing holes 7.
Example 4
Besides the technical scheme of the embodiment 2, the method also comprises the following technical scheme:
the nail cap position of the nail hole 3 adopts a non-notch structure, and the non-notch structure adopts a counter bore.
The interbody fusion cage body 1 is provided with auxiliary fixing holes 7, and the auxiliary fixing holes 7 are used for assisting the fixation of the interbody fusion cage body 1.
The positioning wing 1 is provided with an auxiliary fixing hole 7 which is used for fixing the positioning wing 1 and the lower vertebral body.
Example 5
The embodiment relates to a design and a manufacturing method of a personalized lumbar interbody fusion cage applied to a lumbosacral tuberculosis case.
1. Reconstructing a lumbosacral model between the waist 4 and the sacrum by using mimics reconstruction software;
2. measuring parameters of the waist 5 of tuberculosis disease erosion, namely the sizes of the sacral upper end plate and the residual vertebral body of the waist 5, wherein the length of the sacral upper end plate is 42mm, the width of the sacral upper end plate is 28mm, the height of the sacral upper end plate is 27mm at the front side, and the height of the sacral upper end plate is 19mm at the rear side;
3. the length of the contact surface of the fusion device main body and the sacrum is designed to be 32mm, and the two ends of the fusion device main body are respectively provided with a 5mm gap compared with the upper end plate of the sacrum; the width is designed to be 22mm, namely the front side is flush with the front side of the upper sacral endplate, and the rear side is set aside by 5 mm; the height is designed according to the actual height of the gap between the waist 5 and the sacrum, namely the height of the front side is 27mm, and the height of the back side is 19 mm;
4. the upper end of the positioning wing of the fusion cage is connected with the main body, the inner side of the positioning wing is attached to the front surface of the sacrum, the length is 27mm, and the thickness is 2 mm;
5. two screw holes are designed on the fusion cage main body, and the hole channel avoids the position of the taper hole, so that screws are inserted into the holes in a crossed manner and are implanted into vertebral pedicles respectively; two nail holes are designed on the positioning wing to assist in fixation, and the screws are implanted into the vertebral pedicle;
6. the position of the nail cap adopts a non-incisional design, so that the nail cap is prevented from protruding to abrade soft tissues;
7. the center of the fusion cage main body adopts a hollow design, the outer surface adopts a mesh structure and a solid structure which are designed in a staggered way to ensure the strength of the fusion cage, the mesh structure is convenient for bone tissues to grow in, and the fixation of the fusion cage is enhanced.
8. And 3D printing technology is adopted during processing, and the material is metal titanium alloy.
The computer-aided design individualized lumbar interbody fusion cage is characterized by comprising an interbody fusion cage body 1 and a positioning wing 2, wherein the interbody fusion cage body 1 and the positioning wing 2 are integrally formed, the upper end of the positioning wing 2 is connected with the lower end of the fusion cage body 1, and the lower end of the positioning wing 2 is attached to the surface of a lower vertebral body; nail holes 3 are arranged on the intervertebral fusion device main body 1 and the positioning wings 2.
The center of the fusion cage body 1 adopts a hollow structure, and the center of the fusion cage body 1 is provided with a through hole 4.
The outer surface of the fusion cage body adopts a reticular structure 5 and a solid structure 6 which are arranged in a staggered way. The mesh structure and the solid structure are designed in a staggered mode, the solid structure guarantees the strength of the fusion cage, the mesh structure facilitates the bone tissue to grow in, and the fixation of the fusion cage is strengthened.
The nail holes 3 are arranged in pairs, and the nail holes 3 in the pairs are arranged in a crossing manner.
The net structure 5 adopts polygonal meshes;
the polygonal mesh is an even-numbered mesh.
The solid structures 6 are respectively arranged at two sides and the upper end and the lower end of the fusion cage main body.
The nail cap position of the nail hole 3 adopts a non-notch structure, and the non-notch structure adopts a counter bore.
The intervertebral fusion device main body 1 and the positioning wings 2 are both provided with 1 pair of nail holes.
The interbody cage body 1 is provided with auxiliary fixing holes 7.
The positioning wings 2 are provided with auxiliary fixing holes.
The material is a metallic titanium alloy.
Compared with the prior art, use the utility model discloses a lumbar vertebrae interbody fusion cage of preparation, the volume is moderate, and position and fixed mode are accurate reliable, and the incision of having avoided back way pedicle of vertebral arch nail is put into, has realized the wicresoft of operation, and the expense is low, recovery time is short, and the complication is relatively less, and the surface adopts network structure and the crisscross design entity of solid structure to guarantee the intensity of fusing the ware, and network structure is convenient for bone tissue's length goes into, strengthens the fixed of fusing the ware.
Claims (10)
1. The computer-aided design individualized lumbar interbody fusion cage is characterized by comprising an interbody fusion cage main body and positioning wings, wherein the upper ends of the positioning wings are connected with the lower end of the fusion cage main body, and the lower ends of the positioning wings are attached to the surface of a lower vertebral body; two nail holes are respectively designed on the main body and the positioning wings of the intervertebral fusion device, and the two nail holes are respectively arranged in a crossing mode.
2. The computer-aided design personalized lumbar interbody fusion cage of claim 1, wherein the center of the cage body adopts a hollow structure, and the outer surface of the cage body adopts a mesh structure and a solid structure which are staggered.
3. The computer-aided design personalized lumbar interbody fusion cage of claim 2, wherein the nail holes are arranged in pairs, the pairs of nail holes being arranged in a crossing manner.
4. The computer-aided design personalized lumbar interbody fusion cage of claim 3, wherein the mesh structure employs a polygonal mesh.
5. The computer-aided design personalized lumbar interbody cage of claim 4, wherein the polygonal mesh is an even-numbered mesh.
6. The computer-aided design personalized lumbar interbody fusion cage of claim 5, wherein the solid structures are respectively disposed on both sides and upper and lower ends of the cage body.
7. The computer-aided design personalized lumbar interbody fusion cage of claim 1 or 2, wherein the nail cap position of the nail hole adopts a non-incisional structure, and the non-incisional structure adopts a counter bore.
8. The computer-aided design personalized lumbar interbody fusion cage of claim 1 or 2, wherein a plurality of pairs of nail holes are formed on the interbody fusion cage body and the positioning wings.
9. The computer-aided design personalized lumbar interbody cage of claim 8, wherein the interbody cage body is provided with auxiliary fixation holes.
10. The computer-aided design personalized lumbar interbody fusion cage of claim 9, wherein the positioning wings are provided with auxiliary fixation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921114570.8U CN211131545U (en) | 2019-07-16 | 2019-07-16 | Computer aided design individualized lumbar vertebra interbody fusion cage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921114570.8U CN211131545U (en) | 2019-07-16 | 2019-07-16 | Computer aided design individualized lumbar vertebra interbody fusion cage |
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| CN211131545U true CN211131545U (en) | 2020-07-31 |
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