CN113143549A - Lateral approach fusion device - Google Patents
Lateral approach fusion device Download PDFInfo
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- CN113143549A CN113143549A CN202110455429.XA CN202110455429A CN113143549A CN 113143549 A CN113143549 A CN 113143549A CN 202110455429 A CN202110455429 A CN 202110455429A CN 113143549 A CN113143549 A CN 113143549A
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- 230000004927 fusion Effects 0.000 title claims abstract description 77
- 238000013459 approach Methods 0.000 title claims description 44
- 238000010586 diagram Methods 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- 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
- A61F2/447—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 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7083—Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B2017/7073—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant with intervertebral connecting element crossing an imaginary spinal median surface
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a side access fusion cage, comprising: the device comprises an upper cover plate, a lower cover plate, a supporting block, a driving rod, a left wedge-shaped block and a right wedge-shaped block; the lower surface of the upper cover plate comprises an upper cover left inclined plane, an upper cover lower plane and an upper cover right inclined plane which are sequentially connected from left to right; the upper surface of the lower cover plate comprises a lower cover left inclined plane, a lower cover upper plane and a lower cover right inclined plane which are sequentially connected from left to right; the upper cover plate and the lower cover plate are arranged oppositely; the supporting block is inserted into the accommodating cavity, and the rear part of the upper cover plate and the rear part of the lower cover plate are hinged with the rear part of the supporting block; the left thread part of the driving rod is positioned in the left channel, and the right thread part of the driving rod is positioned in the right channel; the thread turning direction of the left thread part is opposite to that of the right thread part; the left wedge-shaped block is arranged in the left channel; the right wedge block is arranged in the right channel. The height of the front part of the side access fusion cage is adjusted under the condition that the height of the rear part of the side access fusion cage is constant.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a lateral approach fusion device.
Background
In spinal fusion surgery, there are a variety of surgical approaches, with the lateral approach being simpler. Most of the lateral approach fusion devices in the market are fixed in height, the height of the front part of the lateral approach fusion device is not adjustable, the degree of matching with the physiological radian of the spine is not high, and the bone grafting fusion rate is influenced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a lateral access fusion cage with an adjustable front height, which solves the above-mentioned problems of the prior art.
To achieve the above and other related objects, the present invention provides a lateral access fusion cage, comprising: the device comprises an upper cover plate, a lower cover plate, a supporting block, a driving rod, a left wedge-shaped block and a right wedge-shaped block;
the lower surface of the upper cover plate comprises an upper cover left inclined plane, an upper cover lower plane and an upper cover right inclined plane which are sequentially connected from left to right; the upper cover left inclined plane and the upper cover right inclined plane are both provided with an upper cover guide groove; an upper cover accommodating groove is formed in the lower plane of the upper cover;
the upper surface of the lower cover plate comprises a lower cover left inclined plane, a lower cover upper plane and a lower cover right inclined plane which are sequentially connected from left to right; the lower cover left inclined plane and the lower cover right inclined plane are both provided with a lower cover guide groove; a lower cover accommodating groove is formed in the upper plane of the lower cover;
the upper cover plate and the lower cover plate are oppositely arranged, a left channel which is folded from left to right is formed between the upper cover left inclined surface and the lower cover left inclined surface, and a right channel which is folded from right to left is formed between the upper cover right inclined surface and the lower cover right inclined surface; the upper cover accommodating groove and the lower cover accommodating groove form an accommodating chamber;
the supporting block is inserted into the accommodating cavity, and the rear part of the upper cover plate and the rear part of the lower cover plate are hinged with the rear part of the supporting block;
the driving rod is provided with a left threaded part and a right threaded part, the left threaded part is positioned in the left channel, and the right threaded part is positioned in the right channel; the thread turning direction of the left thread part is opposite to that of the right thread part;
the left wedge block is arranged in the left channel; the size of the cross section of the left wedge-shaped block is sequentially reduced from front to back along the front-back direction of the side access fusion device; along the left and right directions of the lateral approach fusion cage, the size of the cross section of the left wedge-shaped block is sequentially reduced from left to right; the upper surface of the left wedge-shaped block is provided with a left block upper guide piece, and the lower surface of the left wedge-shaped block is provided with a left block lower guide piece; the left block upper guide piece is inserted into an upper cover guide groove of the upper cover left inclined plane, and the left block lower guide piece is inserted into a lower cover guide groove of the lower cover left inclined plane; a left wedge block is provided with a left block threaded hole, and the left block threaded hole is connected with the left threaded part;
the right wedge block is arranged in the right channel; the size of the cross section of the right wedge-shaped block is sequentially reduced from front to back along the front-back direction of the side access fusion device; along the left and right directions of the lateral approach fusion cage, the size of the cross section of the right wedge-shaped block is sequentially increased from left to right; the upper surface of the right wedge-shaped block is provided with a right block upper guide piece, and the lower surface of the right wedge-shaped block is provided with a right block lower guide piece; the right block upper guide piece is inserted into an upper cover guide groove of the upper cover right inclined plane, and the right block lower guide piece is inserted into a lower cover guide groove of the lower cover right inclined plane; and a right block threaded hole is formed in the right wedge block, and the right block threaded hole is connected with the right threaded part.
Preferably, a positioning boss is sleeved on the driving rod, penetrates through the supporting block and is positioned in the accommodating cavity; work as the front portion of upper cover plate with the front portion of lower cover plate struts when the biggest angle, the left side wall in groove is accomodate to the upper cover with the left side wall in groove is accomodate to the lower cover blocks the left side portion of location boss stretches into in the left side passageway, the right side wall in groove is accomodate to the upper cover with the right side wall in groove is accomodate to the lower cover blocks the right side portion of location boss stretches into in the right side passageway.
Preferably, a left side wall of the lower cover receiving groove is parallel to a right side wall of the lower cover receiving groove; a vertical plane which is parallel to the left side wall of the lower cover accommodating groove and has equal distance with the left side wall of the lower cover accommodating groove and the right side wall of the lower cover accommodating groove is a lower cover middle vertical plane; the upper surface of the lower cover plate is symmetrically arranged by taking a middle vertical plane of the lower cover as a middle axial plane; the left side wall of the upper cover accommodating groove is parallel to the right side wall of the upper cover accommodating groove; a vertical plane which is parallel to the left side wall of the upper cover accommodating groove and has equal distance with the left side wall of the upper cover accommodating groove and the right side wall of the upper cover accommodating groove is a middle vertical plane of the upper cover; the lower surface of the upper cover plate is symmetrically arranged by taking the middle vertical plane of the upper cover as a middle axial plane.
Preferably, each of the upper cover guide grooves is located at a front side edge of the lower surface of the upper cover plate, and each of the lower cover guide grooves is located at a front side edge of the upper surface of the lower cover plate.
Preferably, the upper cover left inclined plane and the upper cover right inclined plane are both provided with an upper rod piece receiving groove for inserting the driving rod; each upper rod piece accommodating groove is communicated with the accommodating chamber; the lower cover left inclined plane and the lower cover right inclined plane are respectively provided with a lower rod piece accommodating groove for inserting the driving rod; each lower rod piece accommodating groove is communicated with the accommodating chamber.
Preferably, at least one end face of the driving rod is provided with a driving hole.
Preferably, an upper cover part through hole is formed in the upper surface of the upper cover plate, an upper cover middle supporting structure is arranged in the upper cover part through hole, and the upper cover middle supporting structure is a hollow structure; the lower cover plate is characterized in that a lower cover through hole is formed in the lower surface of the lower cover plate, a lower cover middle supporting structure is arranged in the lower cover through hole, and the lower cover middle supporting structure is of a hollow structure.
Preferably, the left block upper guide part, the left block lower guide part, the right block upper guide part and the right block lower guide part are of the same structure, and the left block upper guide part, the left block lower guide part, the right block upper guide part and the right block lower guide part are of spherical structures.
As described above, the side entry combiner according to the present invention has the following advantageous effects:
when the lateral approach fusion cage is used, the driving rod is rotated, so that the driving rod drives the left wedge-shaped block and the right wedge-shaped block to move back to outward limit positions, the upper cover plate and the lower cover plate are folded, and the lateral approach fusion cage is in an initial state; after the lateral approach fusion cage is implanted between the vertebral bodies, the driving rod is rotated, so that the driving rod drives the left wedge-shaped block and the right wedge-shaped block to move to inward limit positions in opposite directions, the front part of the upper cover plate and the front part of the lower cover plate are gradually expanded in the process that the left wedge-shaped block and the right wedge-shaped block move in opposite directions, when the front part of the upper cover plate and the front part of the lower cover plate are expanded to a maximum angle, the upper cover left inclined plane of the upper cover plate and the lower cover left inclined plane of the lower cover plate are both contacted with the left wedge-shaped block, and the upper cover right inclined plane of the upper cover plate and the lower cover right inclined plane of the lower cover plate are both contacted with the right wedge-shaped block; because the front part of the upper cover plate and the front part of the lower cover plate can be unfolded, under the condition that the height of the rear part of the side access fusion device is fixed, the height of the front part of the side access fusion device can be adjusted, the different height requirements of the front part of the side access fusion device are met, the fusion rate is provided, and the physiological curve of a human body is recovered.
Drawings
Fig. 1 is a schematic front-side three-dimensional structure diagram of the lateral approach fusion cage of the present embodiment in an initial state.
Fig. 2 is a schematic top perspective view of the lateral approach fusion cage of the present embodiment without an upper cover plate.
Fig. 3 is a schematic structural diagram of the lower cover plate of the lateral access fusion cage of the present embodiment.
Fig. 4 is a schematic bottom perspective view of the lateral approach fusion cage of the present embodiment without a lower cover plate.
Fig. 5 is a schematic structural diagram of the upper cover plate of the lateral access fusion cage of the present embodiment.
Fig. 6 is a schematic view showing a rear side three-dimensional structure of the lateral approach fusion cage of the present embodiment in an initial state.
Fig. 7 is a schematic rear plane view of the lateral access fusion cage of the present embodiment in an initial state.
Fig. 8 is a perspective view of the driving rod of the lateral access fusion device according to the present embodiment.
Fig. 9 is a schematic perspective view of the right wedge of the lateral approach fusion cage of the present embodiment.
Fig. 10 is a schematic perspective view of the left wedge of the lateral approach fusion cage of this embodiment.
Fig. 11 is a schematic front side three-dimensional structure diagram of the lateral approach fusion cage of the present embodiment in the expanded state.
Fig. 12 is a schematic rear side perspective view showing the upper cover plate having the upper cover through hole and the lower cover plate having the lower cover through hole in the initial state of the lateral approach fusion cage according to the present embodiment.
Fig. 13 is a front side perspective view of the side access fusion cage of the present embodiment in the expanded state, in which the upper cover plate is provided with an upper cover through hole and the lower cover plate is provided with a lower cover through hole.
Fig. 14 is a schematic left side perspective view illustrating the side entry fusion cage of the present embodiment in an expanded state, in which the upper cover plate has no upper cover through hole and the lower cover plate has no lower cover through hole.
Description of the reference numerals
100 upper cover plate
110 left inclined plane of upper cover
120 upper cover lower plane
130 right inclined plane of upper cover
140 upper cover guide groove
150 upper cover accommodating groove
151 left side wall of upper cover receiving groove
152 upper cover receiving groove right side wall
160 upper rod receiving groove
170 upper cover part through hole
180 middle supporting structure of upper cover
200 lower cover plate
210 lower cover left inclined plane
220 lower cover upper plane
230 lower cover right inclined plane
240 lower cover guide groove
250 lower cover accommodating groove
251 left side wall of lower cover receiving groove
252 right side wall of lower cover receiving groove
260 lower rod receiving groove
270 lower cover part through hole
280 middle support structure of lower cover
300 support block
400 driving rod
410 left side screw thread part
420 right side screw thread part
430 positioning boss
440 drive aperture
500 left wedge block
510 left block upper guide
520 left block lower guide
530 left block body threaded hole
600 right wedge block
610 right block upper guide
620 right block lower guide
630 right block threaded hole
710 left channel
720 right channel
730 containing chamber
810 hollow unit
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
In the following description, the upper side of the side entry combiner refers to the upper side with respect to the paper of fig. 7, the lower side of the side entry combiner refers to the lower side with respect to the paper of fig. 7, the left side of the side entry combiner refers to the left side with respect to the paper of fig. 7, the right side of the side entry combiner refers to the right side with respect to the paper of fig. 7, the front side of the side entry combiner refers to the back side with respect to the paper of fig. 7, and the rear side of the side entry combiner refers to the front side with respect to the paper of fig. 7.
As shown in fig. 1 to 14, the lateral access fusion cage of the present embodiment includes: the upper cover plate 100, the lower cover plate 200, the supporting block 300, the driving rod 400, the left wedge block 500 and the right wedge block 600;
the lower surface of the upper cover plate 100 comprises an upper cover left inclined plane 110, an upper cover lower plane 120 and an upper cover right inclined plane 130 which are sequentially connected from left to right; the upper cover left inclined plane 110 and the upper cover right inclined plane 130 are both provided with an upper cover guide groove 140; an upper cover receiving groove 150 is formed on the upper cover lower plane 120;
the upper surface of the lower cover plate 200 comprises a lower cover left inclined plane 210, a lower cover upper plane 220 and a lower cover right inclined plane 230 which are sequentially connected from left to right; the lower cover left inclined plane 210 and the lower cover right inclined plane 230 are both provided with a lower cover guide groove 240; a lower cover receiving groove 250 is formed on the lower cover upper plane 220;
the upper cover plate 100 and the lower cover plate 200 are oppositely arranged, a left channel 710 which is closed from left to right is formed between the upper cover left inclined surface 110 and the lower cover left inclined surface 210, and a right channel 720 which is closed from right to left is formed between the upper cover right inclined surface 130 and the lower cover right inclined surface 230; the upper cover receiving groove 150 and the lower cover receiving groove 250 form a receiving chamber 730;
the supporting block 300 is inserted into the receiving chamber 730, the rear portion of the upper cover plate 100 is hinged with the rear portion of the supporting block 300, and the rear portion of the lower cover plate 200 is hinged with the rear portion of the supporting block 300;
the driving rod 400 is provided with a left threaded part 410 and a right threaded part 420, the left threaded part 410 is positioned in the left channel 710, and the right threaded part 420 is positioned in the right channel 720; the thread direction of the left thread part 410 is opposite to that of the right thread part 420;
a left wedge block 500 disposed in the left channel 710; the size of the cross section of the left wedge-shaped block 500 is sequentially reduced from front to back along the front-back direction of the side entry fusion cage; along the left-right direction of the lateral approach fusion cage, the size of the cross section of the left wedge-shaped block 500 is reduced from left to right in sequence; a left block upper guide 510 is arranged on the upper surface of the left wedge-shaped block 500, and a left block lower guide 520 is arranged on the lower surface of the left wedge-shaped block 500; the left block upper guide 510 is inserted into the upper cover guide groove 140 of the upper cover left inclined plane 110, and the left block lower guide 520 is inserted into the lower cover guide groove 240 of the lower cover left inclined plane 210; a left block threaded hole 530 is formed in the left wedge block 500, and the left block threaded hole 530 is connected with the left threaded portion 410;
a right wedge block 600 disposed in the right channel 720; the size of the cross section of the right wedge-shaped block 600 is sequentially reduced from front to back along the front-back direction of the side entry fusion cage; along the left and right directions of the lateral approach fusion cage, the size of the cross section of the right wedge-shaped block 600 is sequentially increased from left to right; a right block upper guide 610 is arranged on the upper surface of the right wedge block 600, and a right block lower guide 620 is arranged on the lower surface of the right wedge block 600; the right block upper guide 610 is inserted into the upper cover guide groove 140 of the upper cover right inclined plane 130, and the right block lower guide 620 is inserted into the lower cover guide groove 240 of the lower cover right inclined plane 230; the right wedge block 600 is provided with a right block threaded hole 630, and the right block threaded hole 630 is connected with the right threaded portion 420.
When the lateral approach fusion cage is used, the driving rod 400 is rotated, so that the driving rod 400 drives the left wedge-shaped block 500 and the right wedge-shaped block 600 to move back to the outward limit position, the upper cover plate 100 and the lower cover plate 200 are folded, and the lateral approach fusion cage is in an initial state; after the lateral approach fusion cage is implanted between the vertebral bodies, the driving rod 400 is rotated, so that the driving rod 400 drives the left wedge-shaped block 500 and the right wedge-shaped block 600 to move to the inward limit position oppositely; in the process that the left wedge block 500 and the right wedge block 600 move towards each other, the left block upper guide 510 of the left wedge block 500 moves downwards in the upper cover guide groove 140 of the upper cover left inclined surface 110, the left block lower guide 520 of the left wedge block 500 moves upwards in the lower cover guide groove 240 of the lower cover left inclined surface 210, the right block upper guide 610 of the right wedge block 600 moves downwards in the upper cover guide groove 140 of the upper cover right inclined surface 130, and the right block lower guide 620 of the right wedge block 600 moves upwards in the lower cover guide groove 240 of the lower cover right inclined surface 230, so that the front part of the upper cover plate 100 and the front part of the lower cover plate 200 are gradually spread; when the front portions of the upper and lower cover plates 100 and 200 are spread to the maximum angle, the upper cover left inclined surface 110 of the upper cover plate 100 and the lower cover left inclined surface 210 of the lower cover plate 200 are both in contact with the left wedge block 500, and the upper cover right inclined surface 130 of the upper cover plate 100 and the lower cover right inclined surface 230 of the lower cover plate 200 are both in contact with the right wedge block 600; because the front part of the upper cover plate 100 and the front part of the lower cover plate 200 can be opened, the height of the front part of the lateral approach fusion cage can be adjusted under the condition that the height of the rear part of the lateral approach fusion cage is fixed, the different height requirements of the front part of the lateral approach fusion cage can be met, the fusion rate is provided, and the physiological curve of a human body is recovered.
When the driving rod 400 is rotated, the driving rod 400 is easy to move along the axial direction thereof, that is, the driving rod 400 is easy to move along the left and right directions of the side entry fusion cage, the driving rod 400 is sleeved with a positioning boss 430, the positioning boss 430 penetrates through the supporting block 300, and the positioning boss 430 is located in the accommodating chamber 730; when the front of the upper cover plate 100 and the front of the lower cover plate 200 are spread to the maximum angle, the left sidewall 151 of the upper cover receiving groove and the left sidewall 251 of the lower cover receiving groove block the left portion of the positioning boss 430 from protruding into the left passage 710, and the right sidewall 152 of the upper cover receiving groove and the right sidewall 252 of the lower cover receiving groove block the right portion of the positioning boss 430 from protruding into the right passage 720. The supporting block 300 is provided with an insertion hole for inserting the positioning boss 430, the positioning boss 430 is cylindrical, and the insertion hole is a circular hole.
The driving rod 400 is sleeved with a positioning boss 430, and the positioning boss 430 protrudes out of the driving rod 400; when the front portion of the upper cover 100 and the front portion of the lower cover 200 are spread to a maximum angle or when the upper cover 100 and the lower cover 200 are in the initial state after the driving lever 400 is rotated, the positioning boss 430 is restricted in the receiving chamber 730, which can restrict the driving lever 400 from moving left and right.
The left sidewall 251 of the lower cover receiving groove is parallel to the right sidewall 252 of the lower cover receiving groove; a vertical plane parallel to the left sidewall 251 of the lower cover accommodating groove and having equal distances to both the left sidewall 251 of the lower cover accommodating groove and the right sidewall 252 of the lower cover accommodating groove is a lower cover middle vertical plane; the upper surface of the lower cover plate 200 is symmetrically arranged by taking a lower cover middle vertical plane as a middle axial plane; the left sidewall 151 of the upper cover receiving groove is parallel to the right sidewall 152 of the upper cover receiving groove; a vertical plane parallel to the left sidewall 151 of the upper cover accommodating groove and having equal distances to both the left sidewall 151 of the upper cover accommodating groove and the right sidewall 152 of the upper cover accommodating groove is an upper cover middle vertical plane; the lower surface of the upper cover plate 100 is symmetrically arranged by taking the vertical plane in the middle of the upper cover as a middle axial plane. According to the structure, when the front part of the upper cover plate 100 and the front part of the lower cover plate 200 are opened, the rotation angles of the left side part of the upper cover plate 100 and the right side part of the upper cover plate 100 are the same, and the rotation angles of the left side part of the lower cover plate 200 and the right side part of the lower cover plate 200 are the same, so that the upper surface of the upper cover plate 100 and the lower surface of the lower cover plate 200 can better fit with the endplates of adjacent vertebral bodies.
For convenience of processing, in this embodiment, the left wedge block 500 and the right wedge block 600 have the same structure, the left wedge block 500 is a hexahedron, among six outer side surfaces of the left wedge block 500, the upper surface of the left wedge block 500 and the lower surface of the left wedge block 500 are rectangles, and the remaining four outer side surfaces of the left wedge block 500 are trapezoidal. The middle vertical plane of the upper cover and the middle vertical plane of the lower cover are coplanar, and the upper cover middle vertical plane of the left wedge-shaped block 500 and the upper cover middle vertical plane of the right wedge-shaped block 600 are used as a middle axial plane and are symmetrically arranged. The upper cover plate 100 has the same structure as the lower cover plate 200. The upper-cover left inclined plane 110, the upper-cover right inclined plane 130, the lower-cover left inclined plane 210, and the lower-cover right inclined plane 230 are all flat planes.
Each of the upper cover guide grooves 140 is formed at a front side edge of the lower surface of the upper cover plate 100, and each of the lower cover guide grooves 240 is formed at a front side edge of the upper surface of the lower cover plate 200. This structure facilitates quick expansion of the front portions of the upper cover plate 100 and the lower cover plate 200.
In order to make the structure of the side entry fusion cage more compact, the upper cover left inclined plane 110 and the upper cover right inclined plane 130 are both provided with an upper rod piece accommodating groove 160 for inserting the driving rod 400; each upper rod receiving slot 160 is in communication with a receiving chamber 730; the lower cover left inclined plane 210 and the lower cover right inclined plane 230 are both provided with a lower rod piece accommodating groove 260 for inserting the driving rod 400; each lower rod receiving slot 260 communicates with a receiving chamber 730. This configuration allows the upper cover lower plane 120 to be parallel to the lower cover upper plane 220 when the lateral approach fusion cage is in the initial state.
In order to facilitate the rotation control of the driving rod 400, at least one end surface of the driving rod 400 is provided with a driving hole 440, and the driving hole 440 is used for inserting a tool. In this embodiment, the driving hole 440 has a hexagonal shape. The drive aperture 440 is on an end face of the drive rod 400.
An upper cover part through hole 170 is formed in the upper surface of the upper cover plate 100, an upper cover middle supporting structure 180 is arranged in the upper cover part through hole 170, and the upper cover middle supporting structure 180 is a hollow structure; the lower cover plate 200 has a lower cover through hole 270 on the lower surface thereof, a lower cover middle support structure 280 is disposed in the lower cover through hole 270, and the lower cover middle support structure 280 is a hollow structure. The hollow structure comprises a plurality of hollow units 810 which are connected, each hollow unit 810 comprises a plurality of trabeculae, the first ends of all the trabeculae in each hollow unit 810 are connected, and the trabeculae of two adjacent hollow units 810 are connected. This structure makes all fretwork units 810 can have stable holding power, and can further promote bone blood to fuse.
The left block upper guide part 510, the left block lower guide part 520, the right block upper guide part 610 and the right block lower guide part 620 are of the same structure, and the left block upper guide part 510, the left block lower guide part 520, the right block upper guide part 610 and the right block lower guide part 620 are of spherical structures. This structure facilitates the movement of the left block upper guide 510 of the left wedge block 500 in the upper cover guide groove 140 of the upper cover left inclined surface 110, the left block lower guide 520 of the left wedge block 500 in the lower cover guide groove 240 of the lower cover left inclined surface 210, the right block upper guide 610 of the right wedge block 600 in the upper cover guide groove 140 of the upper cover right inclined surface 130, and the right block lower guide 620 of the right wedge block 600 in the lower cover guide groove 240 of the lower cover right inclined surface 230.
In this embodiment, the upper cover plate 100 is hinged to the support block 300, and the lower cover plate 200 is hinged to the support block 300; the lateral approach fusion cage is integrally formed through 3D printing, and after the lateral approach fusion cage is implanted into a gap of a vertebral body, when the front portion of the upper cover plate 100 and the front portion of the lower cover plate 200 are spread to a maximum angle as viewed from the right side of the lateral approach fusion cage, the upper cover plate 100 rotates 5 ° counterclockwise, and the lower cover plate 200 rotates 5 ° clockwise. The left block upper guide 510 and the left block lower guide 520 are integrally formed with the left wedge 500 by 3D printing; guide 610 and right block down guide 620 all adopt 3D to print integrated into one piece with right wedge 600 on the right block.
The left block upper guide 510 of the left wedge block 500 is embedded into the upper cover guide groove 140 of the upper cover left inclined surface 110, the left block lower guide 520 of the left wedge block 500 is embedded into the lower cover guide groove 240 of the lower cover left inclined surface 210, the right block upper guide 610 of the right wedge block 600 is embedded into the upper cover guide groove 140 of the upper cover right inclined surface 130, and the right block lower guide 620 of the right wedge block 600 is embedded into the lower cover guide groove 240 of the lower cover right inclined surface 230; before the lateral approach fusion cage is implanted into the interbody space, the left block upper guide 510 is positioned at the leftmost side of the upper cover guide groove 140 of the upper cover left inclined plane 110, the left block lower guide 520 is positioned at the leftmost side of the lower cover guide groove 240 of the lower cover left inclined plane 210, the right block upper guide 610 is positioned at the rightmost side of the upper cover guide groove 140 of the upper cover right inclined plane 130, and the right block lower guide 620 is positioned at the rightmost side of the lower cover guide groove 240 of the lower cover right inclined plane 230; the left wedge block 500 blocks the left sides of the upper and lower cover plates 100 and 200, and the right wedge block 600 blocks the right sides of the upper and lower cover plates 100 and 200.
In this embodiment, the thread direction of the left thread portion 410 is left-handed, and the thread direction of the right thread portion 420 is right-handed; the end surface of the right end of the driving rod 400 is provided with a hexagon socket head cap driving hole 440, and the driving rod 400 can be rotated after a medical instrument tool is inserted into the hexagon socket head cap driving hole 440. When the driving lever 400 is rotated counterclockwise, the left and right wedge blocks 500 and 600 approach to the middle, and the included angle between the upper cover plate 100 and the lower cover plate 200 gradually increases to 10 °.
The use method of the lateral approach fusion cage of the embodiment comprises the following steps:
before the side approach fusion device is implanted, the upper cover plate 100 and the lower cover plate 200 are rotated by a certain angle, the driving rod 400 passes through the circular hole of the supporting block 300, the driving rod 400 is screwed into the left wedge block 500 and the right wedge block 600 until the left block upper guide 510 of the left wedge block 500 is embedded into the upper cover guide groove 140 of the upper cover left inclined plane 110, the left block lower guide 520 of the left wedge block 500 is embedded into the lower cover guide groove 240 of the lower cover left inclined plane 210, the right block upper guide 610 of the right wedge block 600 is embedded into the upper cover guide groove 140 of the upper cover right inclined plane 130, the right block lower guide 620 of the right wedge block 600 is embedded into the lower cover guide groove 240 of the lower cover right inclined plane 230, then the positioning boss 430 of the driving rod 400 is received in the receiving chamber 730, the upper cover plate 100 falls, the two upper cover guide grooves 140 of the upper cover plate 100 respectively clamp the left block upper guide 510 of the left wedge block 500 and the right block upper guide 610 of the right wedge block 600, then, the driving rod 400 is rotated clockwise, the driving rod 400 drives the left wedge block 500 and the right wedge block 600 to move back to the outward limit position, at the moment, the left wedge block 500 clamps the left sides of the upper cover plate 100 and the lower cover plate 200, the right wedge block 600 clamps the right sides of the upper cover plate 100 and the lower cover plate 200, and the upper cover plate 100, the lower cover plate 200, the supporting block 300, the driving rod 400, the left wedge block 500 and the right wedge block 600 are assembled into a whole;
after the lateral approach fusion cage is implanted into a gap between adjacent vertebral bodies, the driving rod 400 is rotated counterclockwise, the left wedge block 500 and the right wedge block 600 gradually get close to the middle, when the driving rod 400 drives the left wedge block 500 and the right wedge block 600 to move towards the inward limit position, the left block upper guide 510 is positioned at the rightmost side of the upper cover guide groove 140 of the upper cover left inclined plane 110, the left block lower guide 520 is positioned at the rightmost side of the lower cover guide groove 240 of the lower cover left inclined plane 210, the right block lower guide 620 is positioned at the leftmost side of the upper cover guide groove 140 of the upper cover right inclined plane 130, and the right block lower guide 620 is positioned at the leftmost side of the lower cover guide groove 240 of the lower cover right inclined plane 230; the upper cover left inclined surface 110 of the upper cover plate 100 and the lower cover left inclined surface 210 of the lower cover plate 200 are both in contact with the left wedge block 500, and the upper cover right inclined surface 130 of the upper cover plate 100 and the lower cover right inclined surface 230 of the lower cover plate 200 are both in contact with the right wedge block 600; at this time, the upper cover plate 100 is rotated counterclockwise by 5 °, the lower cover plate 200 is rotated clockwise by 5 °, and the angle between the upper cover plate 100 and the lower cover plate 200 is gradually increased to 10 °.
The lateral approach fusion cage has the function of adjusting the height of the front part of the lateral approach fusion cage after being implanted, namely the lateral approach fusion cage is expanded again at the front part of the lateral approach fusion cage after being implanted into the gap of the vertebral body, so that the lateral approach fusion cage is tightly contacted with the end plate of the upper vertebral body and the end plate of the lower vertebral body, and the bone grafting fusion rate is improved.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A side entry fusion cage, comprising: the device comprises an upper cover plate (100), a lower cover plate (200), a supporting block (300), a driving rod (400), a left wedge-shaped block (500) and a right wedge-shaped block (600);
the lower surface of the upper cover plate (100) comprises an upper cover left inclined surface (110), an upper cover lower plane (120) and an upper cover right inclined surface (130) which are sequentially connected from left to right; the upper cover left inclined plane (110) and the upper cover right inclined plane (130) are both provided with an upper cover guide groove (140); an upper cover accommodating groove (150) is formed in the upper cover lower plane (120);
the upper surface of the lower cover plate (200) comprises a lower cover left inclined surface (210), a lower cover upper plane (220) and a lower cover right inclined surface (230) which are sequentially connected from left to right; the lower cover left inclined plane (210) and the lower cover right inclined plane (230) are both provided with a lower cover guide groove (240); a lower cover accommodating groove (250) is formed on the lower cover upper plane (220);
the upper cover plate (100) and the lower cover plate (200) are arranged oppositely, a left channel (710) which is folded from left to right is formed between the upper cover left inclined surface (110) and the lower cover left inclined surface (210), and a right channel (720) which is folded from right to left is formed between the upper cover right inclined surface (130) and the lower cover right inclined surface (230); the upper cover receiving groove (150) and the lower cover receiving groove (250) form a receiving chamber (730);
the supporting block (300) is inserted into the receiving chamber (730), and the rear portion of the upper cover plate (100) and the rear portion of the lower cover plate (200) are hinged with the rear portion of the supporting block (300);
a left threaded part (410) and a right threaded part (420) are arranged on the driving rod (400), the left threaded part (410) is positioned in the left channel (710), and the right threaded part (420) is positioned in the right channel (720); the thread direction of the left thread part (410) is opposite to that of the right thread part (420);
a left wedge block (500) disposed in the left channel (710); the size of the cross section of the left wedge-shaped block (500) is sequentially reduced from front to back along the front-back direction of the side access fusion device; along the left and right directions of the lateral approach fusion cage, the size of the cross section of the left wedge-shaped block (500) is reduced from left to right in sequence; a left block upper guide (510) is arranged on the upper surface of the left wedge-shaped block (500), and a left block lower guide (520) is arranged on the lower surface of the left wedge-shaped block (500); the left block upper guide (510) is inserted into the upper cover guide groove (140) of the upper cover left inclined plane (110), and the left block lower guide (520) is inserted into the lower cover guide groove (240) of the lower cover left inclined plane (210); a left block threaded hole (530) is formed in the left wedge block (500), and the left block threaded hole (530) is connected with the left threaded portion (410);
a right wedge block (600) disposed in the right channel (720); the size of the cross section of the right wedge-shaped block (600) is sequentially reduced from front to back along the front-back direction of the side access fusion device; the size of the cross section of the right wedge-shaped block (600) is sequentially increased from left to right along the left-right direction of the lateral approach fusion cage; a right block upper guide (610) is arranged on the upper surface of the right wedge-shaped block (600), and a right block lower guide (620) is arranged on the lower surface of the right wedge-shaped block (600); the right block upper guide (610) is inserted into an upper cover guide groove (140) of the upper cover right inclined plane (130), and the right block lower guide (620) is inserted into a lower cover guide groove (240) of the lower cover right inclined plane (230); and a right block threaded hole (630) is formed in the right wedge block (600), and the right block threaded hole (630) is connected with the right threaded part (420).
2. The side access fusion cage of claim 1, wherein:
a positioning boss (430) is sleeved on the driving rod (400), the positioning boss (430) penetrates through the supporting block (300), and the positioning boss (430) is located in the accommodating cavity (730);
when the front part of the upper cover plate (100) and the front part of the lower cover plate (200) are spread to the maximum angle, the left side wall (151) of the upper cover accommodating groove and the left side wall (251) of the lower cover accommodating groove block that the left side part of the positioning boss (430) extends into the left side channel (710), and the right side wall (152) of the upper cover accommodating groove and the right side wall (252) of the lower cover accommodating groove block that the right side part of the positioning boss (430) extends into the right side channel (720).
3. The side access fusion cage of claim 1, wherein:
a left side wall (251) of the lower cover receiving groove is parallel to a right side wall (252) of the lower cover receiving groove; a vertical plane parallel to the left side wall (251) of the lower cover accommodating groove and having equal distances to both the left side wall (251) of the lower cover accommodating groove and the right side wall (252) of the lower cover accommodating groove is a lower cover middle vertical plane; the upper surface of the lower cover plate (200) is symmetrically arranged by taking a middle vertical plane of the lower cover as a middle axial plane;
a left side wall (151) of the upper cover receiving groove is parallel to a right side wall (152) of the upper cover receiving groove; a vertical plane which is parallel to the left side wall (151) of the upper cover accommodating groove and has equal distances with the left side wall (151) of the upper cover accommodating groove and the right side wall (152) of the upper cover accommodating groove is an upper cover middle vertical plane; the lower surface of the upper cover plate (100) is symmetrically arranged by taking the middle vertical plane of the upper cover as a middle axial plane.
4. The side access fusion cage of claim 1, wherein:
each of the upper cover guide grooves (140) is located at a front side edge of a lower surface of the upper cover plate (100), and each of the lower cover guide grooves (240) is located at a front side edge of an upper surface of the lower cover plate (200).
5. The side access fusion cage of claim 1, wherein:
the upper cover left inclined plane (110) and the upper cover right inclined plane (130) are respectively provided with an upper rod piece accommodating groove (160) for inserting the driving rod (400); each of the upper rod-receiving slots (160) communicating with the receiving chamber (730);
the lower cover left inclined plane (210) and the lower cover right inclined plane (230) are respectively provided with a lower rod piece receiving groove (260) for inserting the driving rod (400); each of the lower rod receiving grooves (260) communicates with the receiving chamber (730).
6. The side access fusion cage of claim 1, wherein:
at least one end face of the driving rod (400) is provided with a driving hole (440).
7. The side access fusion cage of claim 1, wherein:
an upper cover part through hole (170) is formed in the upper surface of the upper cover plate (100), an upper cover middle supporting structure (180) is arranged in the upper cover part through hole (170), and the upper cover middle supporting structure (180) is of a hollow structure;
the lower cover plate is characterized in that a lower cover part through hole (270) is formed in the lower surface of the lower cover plate (200), a lower cover middle supporting structure (280) is arranged in the lower cover part through hole (270), and the lower cover middle supporting structure (280) is of a hollow structure.
8. The side access fusion cage of claim 1, wherein: guide (510) on the left side block body under guide (520) the right side block body on guide (610) and guide (620) structure is the same under the right side block body, guide (510) on the left side block body under guide (520) the right side block body on guide (610) and guide (620) are spherical structure under the right side block body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455429.XA CN113143549A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
| CN202211287957.XA CN115531054A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455429.XA CN113143549A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211287957.XA Division CN115531054A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
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| CN113143549A true CN113143549A (en) | 2021-07-23 |
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| CN202110455429.XA Pending CN113143549A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
| CN202211287957.XA Pending CN115531054A (en) | 2021-04-26 | 2021-04-26 | Lateral approach fusion device |
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| CN215130941U (en) * | 2021-04-26 | 2021-12-14 | 上海三友医疗器械股份有限公司 | Lateral approach fusion device |
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2021
- 2021-04-26 CN CN202110455429.XA patent/CN113143549A/en active Pending
- 2021-04-26 CN CN202211287957.XA patent/CN115531054A/en active Pending
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| CN105326587A (en) * | 2015-12-09 | 2016-02-17 | 北京市富乐科技开发有限公司 | Opening type interbody fusion cage |
| TW201825058A (en) * | 2017-01-06 | 2018-07-16 | 克菱生技有限公司 | Expandable spinal interbody cage |
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| CN115531054A (en) | 2022-12-30 |
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