CN110141406B - Thoracolumbar implant and artificial vertebral body for thoracolumbar - Google Patents
Thoracolumbar implant and artificial vertebral body for thoracolumbar Download PDFInfo
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- CN110141406B CN110141406B CN201910544195.9A CN201910544195A CN110141406B CN 110141406 B CN110141406 B CN 110141406B CN 201910544195 A CN201910544195 A CN 201910544195A CN 110141406 B CN110141406 B CN 110141406B
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- 239000007943 implant Substances 0.000 title claims abstract description 106
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 210000001951 dura mater Anatomy 0.000 claims abstract description 9
- 210000005036 nerve Anatomy 0.000 claims abstract description 9
- 210000000278 spinal cord Anatomy 0.000 claims abstract description 9
- 238000002513 implantation Methods 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 2
- 210000000988 bone and bone Anatomy 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 208000019505 Deglutition disease Diseases 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 210000000115 thoracic cavity Anatomy 0.000 description 3
- 208000028389 Nerve injury Diseases 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008764 nerve damage Effects 0.000 description 2
- 230000036262 stenosis Effects 0.000 description 2
- 208000037804 stenosis Diseases 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000002008 hemorrhagic effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 208000005198 spinal stenosis Diseases 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The embodiment of the invention provides a thoracolumbar implant and an artificial vertebral body of the thoracolumbar, wherein the thoracolumbar implant comprises an implant plate, the implant plate is provided with a concave part for avoiding spinal cord, dura mater sac and nerves in a vertebral canal of a human body and a fixing hole for implanting a fixing screw, and the concave part is positioned on the peripheral wall of the implant plate. The artificial vertebral body of thoracolumbar comprises a telescopic connecting component and two thoracolumbar implants. The thoracolumbar implant and the thoracolumbar artificial vertebral body have the advantages of simple and reasonable structure, firm fixation, high success rate of operation and the like.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a thoracolumbar implant and an artificial thoracolumbar vertebral body.
Background
The existing artificial vertebral body can replace a damaged vertebral body, the requirement of reconstructing height in different spine defect areas is met through a self-expandable mechanism, fusion between the artificial vertebral body and upper and lower adjacent vertebral bodies is achieved through middle bone grafting, and the auxiliary fixation of an anterior way or a posterior way is combined, so that firm fixation is achieved, and a satisfactory fusion effect is achieved.
The research shows that the existing thoracolumbar artificial vertebral body has the following defects in the using process:
The artificial vertebral body of thoracolumbar vertebra needs to be implanted with the help of an additional auxiliary fixing device, so that the operation difficulty and the operation risk are increased.
Disclosure of Invention
The invention aims at providing a thoracolumbar implant and a thoracolumbar artificial vertebral body, which can avoid spinal cord, dura mater sac and nerves in a vertebral canal of a human body, avoid pressing the spinal cord, dura mater sac and nerves in the vertebral canal of the human body, reduce the risk of spinal stenosis, nerve injury and paralysis, simultaneously, do not need additional anterior steel plate fixation, reduce the operation difficulty, save the operation time and avoid the stimulation of anterior steel plate to the anterior soft tissues after the anterior steel plate is used.
Embodiments of the invention may be implemented as follows:
embodiments of the present invention provide a thoracolumbar implant comprising:
the implant plate is provided with a concave part for avoiding spinal cord, dura mater sac and nerves in the spinal canal of the human body and a fixing hole for implanting a fixing screw, and the concave part is positioned on the peripheral wall of the implant plate.
Optionally, the recess is an arc-shaped groove.
Optionally, the implantation plate has relative first face and second face along its thickness direction, and first face is used for cooperating with chest lumbar vertebrae butt, is provided with the lug on the second face, and the fixed orifices runs through lug and implantation plate, and the axis of fixed orifices is inclined for first face or second face.
Optionally, the thoracolumbar implant further comprises an anti-falling member, wherein the anti-falling member can be connected with the protruding block and is used for preventing the fixing screw penetrating into the fixing hole from falling off from the fixing hole.
Optionally, the bump is provided with a screw hole, the anti-falling piece comprises a rod part with a hollow structure and an end cap connected with one end of the rod part, the rod part is screwed in the screw hole, one end of the rod part far away from the end cap can be turned outwards to form a folded edge, so that the bump is clamped between the end cap and the folded edge; the end cap is used for preventing the fixing screw penetrating through the fixing hole from falling off from the fixing hole.
Optionally, the thoracolumbar implant further includes a second vertebral body and a telescopic connection assembly, the telescopic connection assembly includes a first fixing piece, a second fixing piece and an adjusting piece, the first fixing piece and the second fixing piece are in sliding fit along a preset direction, the first fixing piece and the second fixing piece are relatively fixed along a direction around a preset axis, the preset axis extends along the preset direction, the adjusting piece is in threaded connection with the first fixing piece, the adjusting piece is rotationally connected with the second fixing piece, and the adjusting piece and the second fixing piece are relatively fixed along the preset direction; one end of the first fixing piece far away from the second fixing piece is connected with the implantation plate, and one end of the second fixing piece far away from the first fixing piece is connected with the second vertebral body.
Optionally, the first fixing piece comprises a first fixing barrel, and an external thread is arranged on the peripheral wall of the first fixing barrel; the first fixing cylinder comprises a first cylinder body and a plurality of first convex strips, the first convex strips are connected to one end of the first cylinder body and are distributed at intervals along the circumferential direction of the first cylinder body, and adjacent first convex strips and the first cylinder body form clamping grooves together; the second fixing piece comprises a second fixing barrel, the second fixing barrel comprises a second barrel body and a plurality of second raised strips, the second raised strips are connected to one end of the second barrel body and are distributed at intervals along the circumferential direction of the second barrel body, and the adjacent second raised strips and the second barrel body form a second clamping groove together; the first fixed cylinder is inserted into the second fixed cylinder, the first protruding strip is clamped in the second clamping groove, and the second protruding strip is clamped in the clamping groove.
Optionally, one end of the first barrel body far away from the first raised strip is provided with a plurality of first adjusting holes which are arranged at intervals along the circumferential direction of the first barrel body, and the implantation plate is provided with a limiting hole; the artificial vertebral body of thoracolumbar vertebra also comprises a locking piece, wherein the locking piece can be inserted into the limiting hole and the first adjusting hole so as to fix the implantation plate on the first cylinder body.
Optionally, a plurality of joint protruding of arranging along its circumference interval are provided with to the one end of regulating part, and the spiro union has the gag lever post on the second fixed section of thick bamboo, and the gag lever post can the joint between adjacent joint protruding.
The embodiment of the invention also provides a thoracolumbar artificial vertebral body, which comprises:
set screw and foretell chest lumbar vertebrae implant, set screw can wear to establish in the fixed orifices.
The thoracolumbar implant and the artificial vertebral body of the thoracolumbar according to the embodiment of the invention have the beneficial effects that:
The thoracolumbar implant provided by the embodiment comprises an implant plate, wherein the implant plate is provided with a concave part and a fixing hole. When the thoracolumbar implant is implanted into a human body, the implant plate is in butt fit with the lower surface of the upper human body vertebral body, after the position installation of the implant plate is completed, the concave part on the implant plate can avoid spinal cord, dura mater sac and nerves in the human body vertebral canal, so that the implant plate is prevented from pressing the human body vertebral canal, and the incidence rate of the vertebral canal stenosis is reduced. Simultaneously, be provided with the fixed orifices on the implantation board, can utilize set screw to pass the fixed orifices and fix implantation board and human centrum, need not use the anterior approach steel sheet, have can shorten operation time, reduce the wound of operation to the human body, reduce the hemorrhagic volume of operation process, reduce stress shelter from and avoid advantages such as postoperative dysphagia.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a thoracolumbar implant according to an embodiment of the present invention;
Fig. 2 is an exploded view of a thoracolumbar implant according to an embodiment of the present invention;
FIG. 3 is a schematic view of an implant plate according to an embodiment of the present invention;
Fig. 4 is a schematic structural view of an anti-falling member according to an embodiment of the present invention;
Fig. 5 is a schematic structural view of an artificial vertebral body for thoracolumbar according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of an artificial vertebral body for thoracolumbar according to an embodiment of the present invention;
Fig. 7 is an exploded view of an artificial vertebral body for thoracolumbar according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a deformed structure of an artificial vertebral body for thoracolumbar according to an embodiment of the present invention.
Icon: 1-thoracic and lumbar vertebrae artificial vertebral body; 10-thoracolumbar implant; 100-implanting a plate; 101-upper implant plate; 102-lower implant plate; 103-a depression; 103 a-arcuate surfaces; 104-fixing holes; 105-a first panel; 106-a second plate surface; 106 a-a protrusion; 107-bone grafting window; 108-clamping holes; 108 a-limit protrusions; 109-limiting holes; 110-bump; 111-screw holes; 120-anti-falling pieces; 121-end caps; 121 a-an adjustment slot; 122-a stem; 20-a telescopic connection assembly; 200-a first fixing piece; 201-a first fixed cylinder; 201 a-a first cartridge body; 201 b-first ridge; 201 c-a first card slot; 201 d-a first plug end; 201 e-a first adjustment aperture; 201 f-limiting concave grooves; 210-a second securing member; 211-a second fixed cylinder; 211 a-a second cartridge body; 211 b-second ribs; 211 c-a second card slot; 211 d-a second plug end; 211 e-annular projection; 220-an adjusting member; 221-a clamping protrusion; 222-an annular groove; 30-fixing screws; 40-locking member; 50-limiting rods; 60-limit posts.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The present embodiment provides a thoracolumbar implant for implantation into a human body, and has replaced a damaged thoracolumbar portion in the human body, and it should be noted that the implantation position of the thoracolumbar implant is selected as required, and the damaged human thoracolumbar portion can be replaced and supported between two thoracolumbar segments, which is not specifically described herein. After the thoracolumbar implant is implanted into a human body, the thoracolumbar implant can not press the vertebral canal of the human body, and has a stable fixing mechanism, so that the use of an auxiliary fixing device is avoided, the operation time is shorter, and the operation success rate is higher.
Referring to fig. 1-3, the thoracolumbar implant 10 provided in this embodiment includes an implant plate 100, wherein the implant plate 100 is provided with a recess 103 for avoiding spinal cord, dura mater sac and nerves in a spinal canal of a human body and a fixing hole 104 for implanting a fixing screw 30, and the recess 103 is located on an outer peripheral wall of the implant plate 100.
In the thoracolumbar implant 10 provided in this embodiment, when the thoracolumbar implant 10 is implanted into a human body, the implant plate 100 is in abutting fit with the lower surface of the upper human body vertebral body, after the position installation of the implant plate 100 is completed, the recess 103 on the implant plate 100 can avoid the spinal cord, the dura mater sac and the nerve in the spinal canal of the human body, so that the implant plate 100 is prevented from pressing the spinal cord, the dura mater sac and the nerve in the spinal canal of the human body, and the occurrence probability of spinal canal stenosis, nerve injury and paralysis is reduced. Meanwhile, the fixing holes 104 are formed in the implant plate 100, the implant plate 100 can be fixed with the vertebral body of the human body by penetrating the fixing holes 104 through the fixing screws 30, and a front steel plate is not needed, so that the surgical time can be shortened, the trauma of the operation to the human body can be reduced, the bleeding amount in the surgical process can be reduced, the stress shielding can be reduced, the dysphagia after the operation can be avoided, and the like.
It should be noted that, the thoracolumbar implant provided in this embodiment may be applied to cervical vertebrae, thoracic vertebrae, lumbar vertebrae, etc., and when applied to cervical vertebrae, reduces the risks of dysphagia, foreign body sensation, esophageal adhesion, and crushing; when applied to the thoracolumbar vertebrae, the risk of injury to the anterior large blood vessels, intestinal tracts and organs is reduced.
Referring to fig. 1 and 3, in the present embodiment, the implant plate 100 may be a plate, further, the implant plate 100 is a substantially waist-shaped plate, the implant plate 100 has a first plate surface 105 and a second plate surface 106 opposite to each other along a thickness direction thereof, and an outer peripheral wall connected to the first plate surface 105 and the second plate surface 106, and the outer peripheral wall may be an arc surface. The peripheral wall is provided with a recess 103, and the recess 103 is a groove with an arc-shaped wall 103a, and obviously, in other embodiments, the groove wall of the recess 103 may further include a first plane, a second plane, and a third plane that are sequentially connected, where the first plane and the third plane are disposed opposite to each other, that is, a cross-sectional profile of the recess 103 along a direction perpendicular to a thickness direction of the implant plate 100 is approximately in a "U" shape. The fixing hole 104 of the implant plate 100 may be a cylindrical hole, and the fixing hole 104 penetrates the implant plate 100 in the thickness direction of the implant plate 100. Optionally, the extending direction of the fixing hole 104 has an acute included angle with the thickness direction of the implant plate 100, and the port of the fixing hole 104 on the first plate surface 105 is closer to the middle of the implant plate 100 than the other port of the fixing hole 104, i.e. the fixing hole 104 is inclined toward the middle of the implant plate 100, so that the fixing screw 30 for fixing the implant plate 100 is conveniently inserted into the fixing hole 104. It should be understood that the number of the fixing holes 104 may be one or more as needed, for example, in this embodiment, the number of the fixing holes 104 is two, and the extending directions of the two fixing holes 104 are arranged substantially in parallel, and the two fixing holes 104 are near one side of the implantation plate 100 in the length direction.
Further, the first plate surface 105 of the implant plate 100 is provided with a plurality of protruding portions 106a, the plurality of protruding portions 106a are arranged at intervals, each protruding portion 106a may be a triangular pyramid with a spike shape, and the spike end of the protruding portion 106a faces away from the first plate surface 105. By providing a plurality of protrusions 106a, the initial positioning of the implant plate 100 and the human vertebral body is achieved, so that the implant plate 100 can be conveniently fixed on the human vertebral body subsequently. Meanwhile, the contact area with the vertebral body of the human body is increased, and the degree of operative fusion is improved.
Optionally, the implant plate 100 is provided with a bone grafting window 107, a clamping hole 108 and a limiting hole 109, where the bone grafting window 107 is located approximately in the middle of the implant plate 100, and the bone grafting window 107 may be a cylindrical hole. The limiting hole 109 may be a threaded hole for screwing the locking member 40. It should be noted that, the number of the limiting holes 109 is set as required, for example, in this embodiment, the number of the limiting holes 109 is two, the two limiting holes 109 are arranged at intervals in a direction around the central axis of the bone grafting window 107, and each limiting hole 109 is screwed with one locking member 40. Optionally, the clamping hole 108 is communicated with the bone grafting window 107 and coaxially arranged, the outer diameter of the clamping hole 108 is larger than the outer diameter of the bone grafting window 107, and the clamping hole 108 is located on the second plate surface 106. The hole wall of the clamping hole 108 is provided with a plurality of limit protrusions 108a which are uniformly distributed at intervals along the circumferential direction of the clamping hole 108, a connecting line of a preset point on the limit protrusions 108a and the central point of the clamping hole 108 is set to be a datum line, an included angle formed by two adjacent datum lines is 10-20 degrees, and the datum line is perpendicular to the extending direction of the clamping hole 108.
In other embodiments, the second plate surface 106 of the implant plate 100 is provided with the bump 110, and the protruding direction of the bump 110 is away from the second plate surface 106 along the thickness direction of the implant plate 100. Two fixation holes 104 extend through both the bump 110 and the implant plate 100. The projection of the bump 110 along the direction perpendicular to the second plate surface 106 and on the second plate surface 106 does not block the bone grafting window 107, and does not affect the bone grafting from the bone grafting window 107. By adding the protruding blocks 110, the length of the fixing hole 104 is increased, the contact area with the fixing screw 30 is increased, the fixing screw 30 is more firm and reliable, and the fixing effect is good. Further, the bump 110 is provided with a screw hole 111, the screw hole 111 is located between the two fixing holes 104, the screw hole 111 penetrates through the bump 110, one end of the screw hole 111 is located at the outer side of the implant plate 100, and the other end of the screw hole 111 is close to the inner side where the bone grafting window 107 is located.
Referring to fig. 2, optionally, the artificial thoracic and lumbar vertebra 1 further includes an anti-falling member 120, where the anti-falling member 120 can be connected to the bump 110, so as to prevent the fixing screw 30 penetrating into the fixing hole 104 from falling out of the fixing hole 104. Further, the anti-falling member 120 includes a rod 122 and an end cap 121 connected to one end of the rod 122, and the rod 122 may be a screw capable of being screw-coupled with the screw hole 111. The end cap 121 may be plate-shaped, the periphery of the end cap 121 protrudes radially outward from the outer circumferential surface of the stem 122, and an adjusting groove 121a is provided on the end surface of the end cap 121 away from the stem 122, the adjusting groove 121a being used for insertion engagement of a tool for rotating the anti-drop member 120, the tool may be a wrench or a screwdriver, etc. In the use process, after the rod 122 is screwed onto the bump 110, one end of the rod 122 away from the end cap 121 extends out of the bump 110, one end of the rod 122 extending out of the bump 110 can be deformed, the deformed portion abuts against the bump 110 to prevent the anti-falling member 120 from falling off the bump 110, for example, one end of the bump 110 extending out of the rod 122 can be turned outwards to form a folded edge (not shown in the figure), further, the rod 122 is hollow, one end of the rod 122 extending out of the bump 110 is turned outwards with the middle part as the center to form an annular folded edge, so that the bump 110 and the fixing screw 30 are clamped between the end cap 121 and the folded edge, the turned-out folded edge can limit the anti-falling member 120 from the screw hole 111 after loosening, and the end cap 121 can prevent the fixing screw 30 penetrating into the fixing hole 104 from falling off from the fixing hole 104.
The thoracolumbar implant 10 provided by the embodiment has a simple and reasonable structure, high degree of cooperation with a human body and high success rate of operation.
Referring to fig. 5-8, the present embodiment further provides a thoracolumbar artificial vertebral body 1, which includes a set screw 30, a telescopic connection assembly 20, and two thoracolumbar implants 10. Both implant plates 100 of the two thoracolumbar implants 10 are mounted on the telescopic connection assembly 20, and the implant plates 100 are fixed in the human body after the fixing screws 30 pass through the fixing holes 104 of the corresponding implant plates 100. After the artificial vertebral body 1 for thoracolumbar is implanted, the artificial vertebral body moves in a telescopic way along a preset direction so as to change the distance between the two implantation plates 100, so that the two implantation plates 100 are respectively propped against the corresponding positions of the human body cone.
Referring to fig. 8, in the present embodiment, the number of the fixing screws 30 is set as required, for example, the number of the fixing screws 30 may be four, two fixing screws 30 are set, and one fixing screw 30 is respectively inserted into two fixing holes 104 on each implant plate 100. Obviously, after the fixing screw 30 is inserted into the fixing hole 104, the angle of the fixing screw 30 can be finely adjusted, so as to improve the flexibility in installation and facilitate better fixing of the implant plate 100 in a human body.
Referring to fig. 5, in the present embodiment, the telescopic connecting assembly 20 includes a first fixing member 200, a second fixing member 210 and an adjusting member 220, wherein the first fixing member 200 and the second fixing member 210 are slidably engaged along a predetermined direction, the first fixing member 200 and the second fixing member 210 are relatively fixed along a direction around a predetermined axis, the predetermined axis extends along the predetermined direction, the adjusting member 220 is in threaded connection with the first fixing member 200, the adjusting member 220 is rotatably connected with the second fixing member 210, and the adjusting member 220 and the second fixing member 210 are relatively fixed along the predetermined direction; one end of the first fixation member 200 distal from the second fixation member 210 is coupled to the implant plate 100, and one end of the second fixation member 210 distal from the first fixation member 200 is coupled to the second vertebral body.
Referring to fig. 7, alternatively, the first fixing member 200 includes a first fixing cylinder 201, an outer circumferential wall of the first fixing cylinder 201 is substantially cylindrical, and an outer circumferential wall of the first fixing cylinder 201 is provided with an external thread. Further, the first fixing cylinder 201 includes a first cylinder body 201a having a substantially circular cross section and a plurality of first ribs 201b having a substantially rectangular parallelepiped shape, the plurality of first ribs 201b are connected to one end of the first cylinder body 201a and are arranged at intervals along the circumferential direction of the first cylinder body 201a, and adjacent first ribs 201b and the first cylinder body 201a together form a first clamping groove 201c.
In addition, one end of the first barrel body 201a far away from the first protruding strip 201b is set as a first inserting end 201d, the outer peripheral surface of the first inserting end 201d is provided with a plurality of limiting concave grooves 201f which are uniformly distributed at intervals, a connecting line between a preset point on the limiting concave groove 201f and a central point of the first barrel body 201a is set as a datum line, an included angle formed by two adjacent datum lines is 10 degrees to 20 degrees, wherein the datum line is perpendicular to the extending direction of the first barrel body 201a, the first inserting end 201d is provided with a plurality of first adjusting holes 201e which are distributed along the circumferential direction of the first barrel body 201a at intervals, each first adjusting hole 201e can be a threaded hole for being in threaded connection with a locking piece 40, and the locking piece 40 can penetrate through the limiting hole 109 on the implant plate 100 and be in threaded connection in the corresponding first adjusting hole 201e so as to achieve fixed connection of the implant plate 100 and the first barrel body 201 a.
Referring to fig. 7, optionally, the second fixing member 210 includes a second fixing cylinder 211, the second fixing cylinder 211 includes a second cylinder body 211a and a plurality of second protruding ribs 211b, the plurality of second protruding ribs 211b are connected to one end of the second cylinder body 211a and are arranged at intervals along the circumferential direction of the second cylinder body 211a, and the adjacent second protruding ribs 211b and the second cylinder body 211a together form a second clamping groove 211c. When the fixing device is installed, the first fixing cylinder 201 is inserted into the second fixing cylinder 211, the first protruding strip 201b is clamped in the second clamping groove 211c, and the second protruding strip 211b is clamped in the first clamping groove 201c, so that the first fixing cylinder 201 and the second fixing cylinder 211 are limited to rotate relatively in the direction around the preset axis. The first fixing cylinder 201 and the second fixing cylinder 211 are simple and reliable in assembly structure, are mutually clamped and meshed, are firm and reliable in position, and are safe and reliable to use.
In addition, one end of the second cylinder body 211a far away from the second raised line 211b is set as a second inserting end 211d, the outer peripheral surface of the second inserting end 211d is provided with a plurality of limiting concave grooves 201f which are uniformly distributed at intervals, a connecting line between a preset point on the limiting concave groove 201f and a central point of the second cylinder body 211a is set as a datum line, an included angle formed by two adjacent datum lines is 10 degrees to 20 degrees, wherein the datum line is perpendicular to the extending direction of the second cylinder body 211a, the second inserting end 211d is provided with a plurality of second adjusting holes which are distributed along the circumferential direction of the second cylinder body 211a at intervals, each second adjusting hole can be a threaded hole for being in threaded connection with a locking piece 40, and the locking piece 40 can penetrate through the limiting hole 109 on the implant plate 100 and be in threaded connection with the corresponding second adjusting hole so as to realize fixed connection of the implant plate 100 and the second cylinder body 211 a.
Referring to fig. 7, alternatively, the adjusting member 220 is a ring, and an inner wall of the adjusting member 220 is provided with an internal thread matching with an external thread provided on an outer peripheral wall of the first fixing barrel 201. The adjusting piece 220 is sleeved on the first fixing cylinder 201 and the second fixing cylinder 211, the adjusting piece 220 is in threaded connection with the first fixing cylinder 201 and is in rotational connection with the second fixing cylinder 211, the second fixing cylinder 211 and the adjusting piece 220 are limited to relatively slide along a preset direction, and the adjusting piece 220 and the second fixing cylinder 211 can be connected through a bearing; referring to fig. 6, or the adjusting member 220 is connected to the second fixing cylinder 211 by a concave-convex structure, for example, a hole wall of the adjusting member 220 has an annular groove 222, an end portion of the second protruding strip 211b away from the second cylinder body 211a has an annular protrusion 211e protruding outwards, the annular protrusion 211e is clamped in the annular groove 222, the adjusting member 220 can rotate relative to the second fixing cylinder 211, and meanwhile, the adjusting member 220 cannot slide relative to the second fixing cylinder 211 along a preset direction, it is obvious that in other embodiments, a structure for realizing rotation and axial limitation of the adjusting member 220 and the second fixing cylinder 211 may be other structures, which are not illustrated herein. The end of the adjusting member 220, which is far away from the first fixed cylinder 201, is provided with a plurality of clamping protrusions 221 which are circumferentially arranged at intervals, and the second protruding strips 211b are in threaded connection with the limiting rods 50, so that the limiting rods 50 can be clamped between the adjacent clamping protrusions 221. In actual operation, when the adjusting member 220 needs to be rotated to enable the first fixing cylinder 201 and the second fixing cylinder 211 to relatively slide along the preset direction to adjust the overall length, the limiting rod 50 can be operated to enable the end parts of the limiting rod 50 to be separated from the two adjacent clamping protrusions 221, and at this time, the adjusting member 220 can freely rotate without being limited by the limiting rod 50; when the length of the combined structure of the first fixing cylinder 201 and the second fixing cylinder 211 reaches the set length, the adjusting piece 220 does not need to be rotated, at this time, the limiting rod 50 can be operated to enable the end part of the limiting rod 50 to extend into the space between the two adjacent clamping protrusions 221, the limiting rod 50 plays a role in limiting the rotation of the adjusting piece 220, the positions of the first fixing cylinder 201 and the second fixing cylinder 211 are firm and reliable, the positions between the two implantation plates 100 are firm and reliable, and after the two implantation plates are in abutting fit with a cone of a human body, the two implantation plates are not easy to loosen, and the success rate of an operation is improved.
In other embodiments, the artificial vertebral body 1 for thoracolumbar vertebra further includes a limiting post 60, the limiting post 60 is mounted on the first protruding strip 201b, the limiting post 60 protrudes out of the outer side surface of the first protruding strip 201b, and the limiting post 60 is located between the adjusting member 220 and the second cylinder body 211a, so as to prevent the first fixing cylinder 201 from falling off from the second fixing cylinder 211. Further, the limiting post 60 is screwed on the first protruding strip 201b, and the limiting post 60 can be retracted to a position where the end of the limiting post 60 is not blocked by the adjusting member 220 by rotating the limiting post 60, for example, the end of the limiting post 60 is not protruded out of the outer side surface of the first protruding strip 201b, and the first fixing cylinder 201 and the second fixing cylinder 211 can be separated, so that installation and adjustment are facilitated.
The assembly structure of the thoracolumbar artificial vertebral body 1 provided in this embodiment is as follows:
For convenience of description, the two implant plates 100 are the upper implant plate 101 and the lower implant plate 102, the upper implant plate 101 is buckled on the first inserting end 201d of the first cylinder body 201a through the clamping hole 108 thereof, the hole wall of the clamping hole 108 is matched with the outer circumferential surface of the first inserting end 201d, the limit protrusion 108a formed on the hole wall of the clamping hole 108 is clamped in the corresponding limit concave groove 201f on the outer circumferential surface of the first inserting end 201d, so that the upper implant plate 101 and the first cylinder body 201a are relatively fixed along the circumferential direction of the first cylinder body 201a, and the upper implant plate 101 and the first cylinder body 201a are fixed by utilizing the locking piece 40 to pass through the limit hole 109 and then be screwed in the corresponding first adjusting hole 201 e. In the process of installing the implant plate 101, the angle can be adjusted according to the body cone to be supported, so that the method is more flexible and convenient. The mounting mode of the lower implantation plate 102 is the same as that of the upper implantation plate 101, namely, the lower implantation plate 102 is buckled at the second plugging end 211d by using the clamping hole 108, the limiting protrusion 108a on the lower implantation plate 102 is clamped in the corresponding limiting concave groove 201f of the second cylinder body 211a, the two parts realize circumferential limiting, and then the locking piece 40 is screwed in the corresponding second adjusting hole by penetrating through the limiting hole 109. The upper implantation plate 101 and the lower implantation plate 102 are independently arranged, the angles of the upper implantation plate and the lower implantation plate can be respectively adjusted, and the operation is convenient.
In addition, after the artificial vertebral body 1 for thoracolumbar is implanted into the human body, the adjusting member 220 is operated to make the upper implant plate 101 and the lower implant plate 102 respectively abut on the corresponding human body cones, and then the adjusting member 220 is locked. The fixing screws 30 are inserted into the corresponding fixing holes 104 of the upper implant plate 101 and the lower implant plate 102, and the fixing screws 30 are screwed and fixed with the body cone. Then, the anti-falling part 120 is in the screw connection hole 111 of the protruding block 110, after the end part of the anti-falling part 120 extends out of the protruding block 110, and after the end cap 121 is abutted against the corresponding end part of the fixing screw 30, the end part extending out of the anti-falling part 120 is deformed in a riveting mode to form a folded edge to be abutted against the protruding block 110, so that the fixing of the anti-falling part 120 and the protruding block 110 is realized, the anti-falling part 120 cannot fall off from the protruding block 110, and further the fixing screw 30 cannot fall off from the upper implanting plate 101 and the lower implanting plate 102, the connection between the fixing screw 30 and a human body cone is firm and reliable, and the position is firm and reliable after the thoracic lumbar artificial vertebral body 1 is implanted into a human body.
The artificial vertebral body 1 for thoracolumbar vertebra provided by the embodiment is convenient to install and fix, has high success rate of operation and little damage to patients.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A thoracolumbar implant, comprising:
the implant plate is provided with a concave part for avoiding spinal cord, dura mater sac and nerves in the spinal canal of a human body and a fixing hole for implanting a fixing screw, and the concave part is positioned on the peripheral wall of the implant plate;
The implant plate is provided with a first plate surface and a second plate surface which are opposite to each other along the thickness direction of the implant plate, the first plate surface is used for being in abutting fit with the thoracolumbar vertebrae, the second plate surface is provided with a protruding block, the fixing hole penetrates through the protruding block and the implant plate, and an included angle formed by an acute angle is formed between the extending direction of the fixing hole and the thickness direction of the implant plate;
The thoracolumbar implant also comprises an anti-falling part, wherein the anti-falling part can be connected with the convex block and is used for preventing the fixing screw penetrating into the fixing hole from falling out of the fixing hole;
The anti-falling piece comprises an end cap and a rod part which are connected, the rod part can be in threaded connection with the protruding block, and when the rod part is in threaded connection with the protruding block, one end, far away from the end cap, of the rod part can be deformed so as to prevent the anti-falling piece from falling off from the protruding block; the end cap is used for preventing the fixing screw penetrating through the fixing hole from withdrawing from the fixing hole and falling off.
2. The thoracolumbar implant of claim 1, wherein:
The inner wall of the concave part is an arc-shaped surface.
3. An artificial vertebral body for thoracolumbar vertebrae, comprising:
A telescopic connection assembly and two thoracolumbar implants according to any of claims 1-2, both of the implant plates of both thoracolumbar implants being mounted on the telescopic connection assembly for adjusting the distance between the two implant plates.
4. The artificial thoracolumbar vertebral body of claim 3, wherein: the telescopic connecting assembly comprises a first fixing piece, a second fixing piece and an adjusting piece, wherein the first fixing piece is in sliding fit with the second fixing piece along a preset direction, the first fixing piece and the second fixing piece are relatively fixed in a direction around a preset axis, the preset axis extends along the preset direction, the adjusting piece is in threaded connection with the first fixing piece, the adjusting piece is in rotary connection with the second fixing piece, and the adjusting piece and the second fixing piece are relatively fixed along the preset direction; one end of the first fixing piece far away from the second fixing piece is connected with one implantation plate, and one end of the second fixing piece far away from the first fixing piece is connected with the other implantation plate.
5. The artificial thoracolumbar vertebral body of claim 4, wherein:
The first fixing piece comprises a first fixing barrel, and an external thread is arranged on the peripheral wall of the first fixing barrel; the first fixing cylinder comprises a first cylinder body and a plurality of first convex strips, the first convex strips are connected to one end of the first cylinder body and are distributed at intervals along the circumferential direction of the first cylinder body, and a first clamping groove is formed between the adjacent first convex strips and the first cylinder body; the second fixing piece comprises a second fixing barrel, the second fixing barrel comprises a second barrel body and a plurality of second raised strips, the second raised strips are connected to one end of the second barrel body and are distributed at intervals along the circumferential direction of the second barrel body, and adjacent second raised strips and the second barrel body form a second clamping groove together; the first fixed cylinder is inserted into the second fixed cylinder, the first protruding strips are clamped in the second clamping grooves, and the second protruding strips are clamped in the first clamping grooves.
6. The artificial thoracolumbar vertebral body of claim 5, wherein:
one end of the first cylinder body, which is far away from the first raised strips, is provided with a plurality of first adjusting holes which are arranged at intervals along the circumferential direction of the first cylinder body, and the implantation plate is provided with a limiting hole; the artificial vertebral body of thoracolumbar vertebra also comprises a locking piece, wherein the locking piece can be inserted into the limiting hole and the first adjusting hole, so that the implantation plate is fixed on the first cylinder body.
7. The artificial thoracolumbar vertebral body of claim 6, wherein:
One end of the adjusting piece is provided with a plurality of clamping bulges which are distributed along the circumferential direction at intervals, the second convex strips are connected with limiting rods in a threaded mode, and the limiting rods can be clamped between the adjacent clamping bulges.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910544195.9A CN110141406B (en) | 2019-06-21 | 2019-06-21 | Thoracolumbar implant and artificial vertebral body for thoracolumbar |
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| CN201910544195.9A CN110141406B (en) | 2019-06-21 | 2019-06-21 | Thoracolumbar implant and artificial vertebral body for thoracolumbar |
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| CN115670758B (en) * | 2022-12-28 | 2023-04-18 | 北京爱康宜诚医疗器材有限公司 | Adjustable artificial vertebral body |
| CN117481878B (en) * | 2023-11-16 | 2024-06-21 | 上海三友医疗器械股份有限公司 | Vertebral implant |
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