CN109998657B - Domino joint - Google Patents
Domino joint Download PDFInfo
- Publication number
- CN109998657B CN109998657B CN201910308243.4A CN201910308243A CN109998657B CN 109998657 B CN109998657 B CN 109998657B CN 201910308243 A CN201910308243 A CN 201910308243A CN 109998657 B CN109998657 B CN 109998657B
- Authority
- CN
- China
- Prior art keywords
- clamping block
- connector
- groove
- accommodating groove
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- 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
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
- A61B17/705—Connectors, not bearing on the vertebrae, for linking longitudinal elements together for linking adjacent ends of 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
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
- A61B17/7052—Connectors, not bearing on the vertebrae, for linking longitudinal elements together of variable angle or length
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a domino joint, which belongs to the field of internal fixation consumable materials of spinal column, and comprises the following components: the first connector is provided with a first clamping groove for accommodating a spinal column fixing rod, the inner side wall of the first connector is provided with an accommodating groove, and the bottom of the accommodating groove is provided with a through hole; the outer side wall of the second connector is provided with a connecting column movably penetrating through the communication hole, the top of the connecting column is provided with a clamping block movably arranged in the accommodating groove, and the clamping block is limited by the groove bottom of the accommodating groove; and the pushing mechanism is arranged on one side wall of the first connector and used for laminating and fixing the spine fixing rod and the clamping block in the first clamping groove. The spine fixing rod and the first connector and the second connector can be fixed only by one-time operation of the pushing mechanism, so that the unlocked rotating structure in the locking process is prevented from moving easily, and the relative position and angle of the newly-added spine fixing rod and the original fixed spine fixing rod are difficult to meet the expected requirement.
Description
Technical Field
The invention belongs to the field of internal fixation consumables of a spinal column, and particularly relates to a domino joint.
Background
In pedicle screw rod systems for internal fixation of the spine, spinal fixation rods are used to maintain the curvature of the spine, and in some cases require additional surgery to extend the original fixed spinal fixation rod to increase the fixation range, which requires the use of domino joints to increase the length of the spinal fixation rod.
The prior domino joint is generally provided with a plurality of rotating structures to ensure that the newly-added spine fixing rod and the original spine fixing rod can rotate relatively, the domino joint is respectively fixed with the newly-added spine fixing rod and the original spine fixing rod by utilizing the plurality of locking structures, and the newly-added spine fixing rod and the original spine fixing rod are fixedly connected at a proper angle by locking each rotating structure of the domino joint. In actual use, as doctors need to lock each locking structure in sequence, the operation is more complex, and the unlocked rotating structure is easy to move in the operation process, the relative positions of the newly-added spine fixing rods and the original fixed spine fixing rods are changed, so that the relative positions and angles of the newly-added spine fixing rods and the original fixed spine fixing rods are difficult to meet the expected requirements, and the operation effect is affected.
Disclosure of Invention
The invention aims to provide a domino joint, which solves the technical problems that the prior domino joint in the prior art needs to lock each locking structure in sequence, the operation is complex, and an unlocked rotating structure is easy to move in the operation process, so that the relative position and angle of a newly-added spine fixing rod and an original fixed spine fixing rod are difficult to meet the expected requirement, and the operation effect is influenced.
In order to achieve the above purpose, the invention adopts the following technical scheme: provided is a domino joint comprising:
the first connector is provided with a first clamping groove for accommodating a spinal column fixing rod, the inner side wall of the first connector is provided with an accommodating groove, and the bottom wall of the accommodating groove is provided with a communication hole penetrating through the bottom wall;
the second connector is used for being connected with another spine fixing rod, a connecting column movably penetrating through the communication hole is arranged on the outer side wall, a clamping block movably arranged in the accommodating groove is arranged at the end part of the connecting column, and the clamping block is limited in the accommodating groove by the bottom wall of the accommodating groove; and
the pushing mechanism is arranged on one side wall of the first connector and used for laminating and fixing the spine fixing rod and the clamping block in the first clamping groove.
Further, the pushing mechanism and the holding groove are respectively arranged on two opposite side walls of the first connecting head, and the pushing mechanism is used for sequentially laminating the spine fixing rod and the clamping block in the first clamping groove on the inner side wall, provided with the holding groove, of the first clamping groove.
Further, the pushing mechanism is a first jackscrew which is connected to the side wall of the first connector in a threaded mode.
Further, the outer end surface of the clamping block facing the bottom of the accommodating groove is a spherical surface, and the bottom of the accommodating groove is a spherical surface matched with the outer end surface of the clamping block; and anti-skid patterns are arranged on the outer end face of the clamping block and/or the bottom surface of the accommodating groove.
Further, the maximum distance between the inner end surface and the outer end surface of the clamping block is smaller than the spherical diameter of the outer end surface of the clamping block.
Further, the inner side wall of the opening of the accommodating groove is provided with a limiting ring for limiting the clamping block in the accommodating groove.
Further, the pushing mechanism is arranged on the bottom wall of the accommodating groove, and is used for extruding the clamping block on the limiting ring and enabling the clamping block and the spine fixing rod in the first clamping groove to be sequentially overlapped on the side wall of the first connecting head opposite to the side wall provided with the accommodating groove.
Further, the pushing mechanism is a third jackscrew which is connected to the bottom wall of the accommodating groove in a threaded mode.
Further, the inner end surface of the clamping block facing the limiting ring is a spherical surface, and the end surface of the limiting ring facing the clamping block is a spherical surface matched with the inner end surface of the clamping block; and anti-skid patterns are arranged on the inner end surface of the clamping block and/or the end surface of the limiting ring facing the clamping block.
Further, the second connector is provided with a second clamping groove for accommodating the spine fixing rod, a second jackscrew is connected to the side wall of the second connector in a threaded mode, and the second jackscrew is used for extruding the spine fixing rod in the second clamping groove to the other side wall of the second connector.
The domino joint provided by the invention has the beneficial effects that: compared with the prior art, when the domino joint is used, the first connecting head and the second connecting head are respectively fixed with the newly-added spine fixing rod and the spine fixing rod which is originally fixed, the second connecting head and the spine fixing rod are fixedly connected, the other spine fixing rod penetrates into the first clamping groove, the angle and the position of the first connecting head and the second connecting head are adjusted through the movement of the connecting post and the clamping block, and after the angle and the position of the two spine fixing rods are properly adjusted, the pushing mechanism is operated, the spine fixing rod in the first clamping groove and the clamping block are overlapped and fixed by the pushing mechanism and the other side wall of the first connecting head, so that the spine fixing rod in the first clamping groove is fixed with the first connecting head, and meanwhile the clamping block is fixed with the first connecting head, and the fixation of the first connecting head and the second connecting head is realized. The spine fixing rod and the first connector and the second connector can be fixed only by one-time operation of the pushing mechanism, the operation is simple, and the technical problem that the relative position and the angle of the newly-increased spine fixing rod and the original fixed spine fixing rod are difficult to meet expected requirements and influence the operation effect due to the fact that an unlocked rotating structure is easy to move in the locking process is avoided.
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 or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a domino joint provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the domino joint of FIG. 1 in a locked state;
FIG. 3 is a cross-sectional view of a domino joint according to another embodiment of the present invention;
fig. 4 is a cross-sectional view of the domino joint of fig. 3 in a locked state.
Wherein, each reference sign in the figure:
1-a first connector; 11-a first clamping groove; 12-a receiving groove; 121-a limiting ring; 13-communicating holes; 14-a first jackscrew; 2-a second connector; 21-a second jackscrew; 22-connecting columns; 23-clamping blocks; 24-a second clamping groove; 3-a third jackscrew; 4-spinal fixation rod.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, a description will now be given of a domino joint according to an embodiment of the present invention. The domino connector comprises a first connector 1, a second connector 2 and a pushing mechanism.
The first connector 1 is provided with a first clamping groove 11 for accommodating a spinal fixation rod 4, the inner side wall is provided with an accommodating groove 12, and the bottom wall of the accommodating groove 12 is provided with a communication hole 13 penetrating through the bottom wall. The second connector 2 is used for being connected with another spine fixing rod 4, the outer side wall is provided with a connecting column 22 movably penetrating through the communication hole 13, the end part of the connecting column 22 is provided with a clamping block 23 movably arranged in the accommodating groove 12, and the clamping block is limited in the accommodating groove 12 by the bottom wall of the accommodating groove 12. The pushing mechanism is arranged on one side wall of the first connector 1 and is used for laminating and fixing the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11.
Compared with the prior art, when the domino joint of the embodiment of the invention is used, the first connector 1 and the second connector 2 are respectively fixed with the newly added spine fixing rod and the spine fixing rod which is fixed originally, the second connector 2 is fixedly connected with one spine fixing rod 4, then the other spine fixing rod 4 penetrates into the first clamping groove 11, the angle and the position of the first connector 1 and the second connector 2 are changed through the movement of the connecting column 22 and the clamping block 23, the angle and the position of the two spine fixing rods 4 are properly adjusted, the pushing mechanism is operated, the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 are overlapped and fixed on the other side wall (the side wall is opposite to the side wall provided with the pushing mechanism) of the first connector 1, so that the spine fixing rod 4 in the first clamping groove 11 is fixed with the first connector 1, and the clamping block 23 is fixed with the first connector 1, and the fixing of the first connector 1 and the second connector 2 is realized. The spine fixing rod 4 and the first connector 1 and the second connector 2 can be fixed only by one-time operation of the pushing mechanism, the operation is simple, and the technical problems that the relative position and the angle of the newly-increased spine fixing rod and the original fixed spine fixing rod are difficult to meet expected requirements and the operation effect is influenced due to the fact that an unlocked rotating structure is easy to move in the locking process are avoided.
Specifically, the first connector 1 has a U-shaped cross section, and the groove in the middle forms the first clamping groove 11. The inner wall surface of one side wall of the first connector 1 is provided with a containing groove 12, and the bottom of the containing groove 12 is provided with a communication hole 13 penetrating through the side wall of the first connector 1. The second connector 2 can be fixedly connected with the spine fixing rod 4, the outer side of the second connector is provided with a connecting column 22 penetrating into the communication hole 13, one end of the connecting column 22 is positioned in the accommodating groove 12, and the other end of the connecting column is positioned outside the communication hole 13. The diameter of the connecting post 22 is smaller than that of the communication hole 13, and the length of the connecting post 22 is longer than that of the communication hole 13, so that the connecting post 22 can axially move, radially move and circumferentially rotate in the communication hole 13, and flexibly move. The top that spliced pole 22 is located the holding tank 12 is fixed with joint piece 23, and joint piece 23 can be the cake shape to with spliced pole 22 coaxial fastening, the size of joint piece 23 is less than the size of holding tank 12, makes joint piece 23 can axial displacement, radial displacement and circumferential rotation in holding tank 12, nimble activity. The diameter of the clamping block 23 is larger than that of the communication hole 13, so that the clamping block 23 is limited in the accommodating groove 12 by the groove bottom of the accommodating groove 12. The first connector 1 and the second connector 2 can relatively move through the movement of the connecting column 22 and the clamping block 23, so that the relative positions and angles of the two spinal fixing rods 4 can be adjusted. The inner end surface of the clamping block 23 for being connected with the spine fixing rod 4 protrudes out of the inner wall surface of the side wall of the first connecting head 1, so that the inner end surface of the clamping block 23 can be abutted with the spine fixing rod 4 in the first clamping groove 11. The outer end surface of the clamping block 23 is limited by the bottom wall of the accommodating groove 12, and the clamping block 23 is prevented from falling out of the communication hole 13. The pushing mechanism is arranged on one side wall of the first connector 1, and the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 are fixedly stacked by pushing the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 to the other side wall of the first connector 1.
Referring to fig. 1 and 2 together, as a specific embodiment of the domino connector provided by the present invention, a pushing mechanism and a receiving groove 12 are respectively disposed on two opposite sidewalls of the first connector 1, and the pushing mechanism is used for sequentially stacking the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 on the inner sidewall of the first clamping groove 11 provided with the receiving groove 12.
Specifically, the pressing mechanism is provided on one side wall of the first connector 1, and presses toward the inner wall surface of the other side wall of the first connector 1. The holding groove 12 is concavely arranged on the inner wall surface of the other side wall of the first connecting head 1, and the opening faces to the pushing mechanism, so that the pushing mechanism sequentially pushes the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 and presses the inner wall of the holding groove 12, and the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 are clamped by the pushing mechanism and the inner wall of the holding groove 12, so that the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 are laminated and fixed.
Referring to fig. 1 and 2 together, as an embodiment of the domino connector provided by the present invention, the pushing mechanism is a first jack screw 14 screwed on the sidewall of the first connector 1.
Specifically, the first jack 14 penetrates the side wall of the first connector 1, and the spinal fixation rod 4 in the first clamping groove 11 is pushed by rotating the first jack 14.
Referring to fig. 1 and fig. 2 together, as a specific embodiment of the domino joint provided by the present invention, the outer end surface of the clamping block 23 facing the bottom of the accommodating groove 12 is a spherical surface, and the bottom of the accommodating groove 12 is a spherical surface matching with the outer end surface of the clamping block 23; the outer end surface of the clamping block 23 and/or the bottom surface of the accommodating groove 12 are provided with anti-skid patterns. The outer end face of the clamping block 23 is a spherical surface, the bottom surface of the accommodating groove 12 is a spherical surface matched with the outer end face of the clamping block 23, so that the outer end face of the clamping block 23 and the inner wall surface of the accommodating groove 12 can slide relatively, and the relative movement of the first connector 1 and the second connector 2 is more flexible. After the clamping block 23 is pressed on the bottom surface of the accommodating groove 12 by the anti-skid pattern preventing pressing mechanism, the outer end surface of the clamping block 23 and the bottom surface of the accommodating groove 12 skid.
Specifically, the outer edge diameter of the outer end surface of the clamping block 23 is smaller than the outer edge diameter of the bottom surface of the accommodating groove 12, so that the outer end surface of the clamping block 23 can slide along the bottom surface of the accommodating groove 12 within a certain range. At least one of the outer end surface of the clamping block 23 and the bottom surface of the accommodating groove 12 is provided with anti-slip patterns, so that the outer end surface of the clamping block 23 and the bottom surface of the accommodating groove 12 are prevented from slipping after the clamping block 23 is pressed on the bottom surface of the accommodating groove 12 by the pushing mechanism.
Referring to fig. 1 and 2 together, as a specific embodiment of the domino joint provided by the present invention, a maximum distance between an inner end surface and an outer end surface of the clamping block 23 is smaller than a spherical diameter of the outer end surface of the clamping block 23. The maximum distance between the inner end surface and the outer end surface of the clamping block 23 is reduced, namely the thickness of the clamping block 23 is reduced, so that the volume of the first connector 1 can be reduced, and the device is convenient to install and use in a limited space at the vertebra of a human body.
Specifically, the inner end surface and the outer end surface of the clamping block 23 are spherical surfaces with the same radius, and the maximum distance between the inner end surface and the outer end surface of the clamping block 23 is smaller than the diameter of the outer end surface of the clamping block 23. More specifically, the inner end surface and the outer end surface of the clamping block 23 are two symmetrical spherical surfaces, the center of the inner end surface of the clamping block 23 to the center of the outer end surface of the clamping block 23 is the maximum distance between the inner end surface and the outer end surface of the clamping block 23, and the maximum distance between the inner end surface and the outer end surface of the clamping block 23 is smaller than the radius of the outer end surface of the clamping block 23.
Referring to fig. 1 to 4, as a specific embodiment of the domino connector provided by the present invention, a limiting ring 121 for limiting the clamping block 23 in the accommodating groove 12 is disposed on the inner sidewall of the opening of the accommodating groove 12. The stop collar 121 prevents the snap block 23 from partially entering the first clamping groove 11 from the opening of the receiving groove 12 and blocks insertion of the spinal fixation rod 4 into the first clamping groove 11.
Specifically, the opening of the accommodating groove 12 is circular, and the limiting ring 121 is a circular ring fixed on the inner sidewall at the opening of the accommodating groove 12.
Referring to fig. 3 and fig. 4 together, as a specific embodiment of the domino connector provided by the present invention, the pushing mechanism is disposed on the bottom wall of the accommodating groove 12, and is used to press the clamping block 23 onto the limiting ring 121 and sequentially stack the clamping block 23 and the spine fixing rod 4 in the first clamping groove 11 onto the side wall of the first connector 1 opposite to the side wall provided with the accommodating groove 12.
Specifically, the accommodation groove 12 is provided on the inner wall surface of one side wall of the first connector 1, with the opening facing the other side wall of the first connector 1. The pushing mechanism and the holding groove 12 are arranged on the same side wall of the first connector 1, and the pushing mechanism is arranged on the groove bottom of the holding groove 12 opposite to the outer end face of the clamping block 23, so that the pushing mechanism can push the outer end face of the clamping block 23, push the clamping block 23 into the first clamping groove 11, further enable the clamping block 23 and the spine fixing rod 4 in the first clamping groove 11 to be sequentially stacked on the side wall of the first connector 1 opposite to the holding groove 12, and the side wall of the pushing mechanism and the first connector 1 opposite to the side wall provided with the holding groove 12 is used for fixing the spine fixing rod 4 and the clamping block 23 in the first clamping groove 11 in a stacked mode.
Referring to fig. 3 and fig. 4 together, as an embodiment of the domino connector provided by the present invention, the pushing mechanism is a third jackscrew 3 screwed on the bottom of the accommodating groove 12.
Specifically, the third jack screw 3 penetrates the bottom of the accommodating groove 12, and the outer end surface of the inner clamping block 23 of the accommodating groove 12 is pushed by rotating the third jack screw 3.
Referring to fig. 3 and fig. 4 together, as a specific embodiment of the domino joint provided by the present invention, an inner end of the clamping block 23 facing the limiting ring 121 is a spherical surface, and an end surface of the limiting ring 121 facing the clamping block 23 is a spherical surface matching with an inner end surface of the clamping block 23; the inner end surface of the clamping block 23 and/or the end surface of the limiting ring 121 facing the clamping block 23 are provided with anti-skid patterns. The inner end surface of the clamping block 23 and the limiting ring 121 slide relatively conveniently, so that the relative movement of the first connector 1 and the second connector 2 is more flexible. After the clamping block 23 and the limiting ring 121 are pressed by the anti-skid pattern anti-pressing mechanism, the clamping block 23 and the limiting ring 121 are pressed and slipped.
Specifically, the diameter of the outer edge of the inner end surface of the click block 23 is larger than the diameter of the inner periphery of the stopper ring 121. At least one of the inner end surface of the clamping block 23 and the side surface of the limiting ring 121 facing the clamping block 23 is provided with anti-slip patterns, so that the clamping block 23 and the limiting ring 121 are prevented from slipping after the clamping block 23 and the limiting ring 121 are pressed tightly by the pushing mechanism.
Referring to fig. 3 and fig. 4 together, as a specific embodiment of the domino joint provided by the present invention, the outer surface of the clamping block 23 is a spherical surface, and the inner wall of the accommodating groove 12 is a spherical surface with an inner diameter larger than the outer diameter of the clamping block 23. The clamping block 23 rolls in the accommodating groove 12, so that the movable range of the clamping block 23 in the accommodating groove 12 is larger, and the relative movable ranges of the first connector 1 and the second connector 2 are larger.
Referring to fig. 1 to 4, as a specific embodiment of the domino connector provided by the present invention, the communication hole 13 is conical with a small end facing the clamping block 23, and the diameter of the small end of the communication hole 13 is larger than that of the connecting post 22, so that the limit of the inner end of the side wall of the communication hole 13 to the clamping block 23 is ensured, and the root of the connecting post 22 has a larger moving range at the outer end of the communication hole 13, so that the relative moving range of the first connector 1 and the second connector 2 is further increased.
Referring to fig. 1 to 4 together, as an embodiment of the domino joint provided by the present invention, the second connector 2 is provided with a second clamping groove 24 for accommodating the spinal rod 4, the side wall of the second connector 2 is connected with a second jackscrew 21 in a threaded manner, and the second jackscrew 21 is used for pressing the spinal rod 4 in the second clamping groove 24 onto the other side wall of the second connector 2.
Specifically, the section of the second connector 2 is U-shaped, and the groove in the middle forms the second clamping groove 24. The root of the connecting post 22 is fixed to the outside of one side wall of the second connector 2. The second jackscrew 21 is provided on one side wall of the second connector 2, and the second jackscrew 21 is rotated to push the spinal column fixing rod 4 in the second clamping groove 24, so that the spinal column fixing rod 4 is pressed against the inner wall surface of the other side wall (the side wall opposite to the side wall provided with the second jackscrew) of the second connector 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A domino joint, comprising:
the first connector (1) is provided with a first clamping groove (11) for accommodating a spinal column fixing rod (4), the inner side wall of the first connector is provided with an accommodating groove (12), and the bottom wall of the accommodating groove (12) is provided with a communication hole (13) penetrating through the bottom wall;
the second connector (2) is used for being connected with another spine fixing rod (4), a connecting column (22) which is movably arranged in the communication hole (13) in a penetrating way is arranged on the outer side wall, a clamping block (23) which is movably arranged in the accommodating groove (12) is arranged at the end part of the connecting column (22), and the clamping block is limited in the accommodating groove (12) by the bottom wall of the accommodating groove (12); and
the pushing mechanism is arranged on one side wall of the first connector (1) and used for laminating and fixing the spine fixing rod (4) and the clamping block (23) in the first clamping groove (11);
the pushing mechanism and the accommodating groove (12) are respectively arranged on two opposite side walls of the first connecting head (1), and the pushing mechanism is used for sequentially laminating the spine fixing rod (4) and the clamping block (23) in the first clamping groove (11) on the inner side wall, provided with the accommodating groove (12), of the first clamping groove (11).
2. The domino connector of claim 1, wherein: the pushing mechanism is a first jackscrew (14) which is connected to the side wall of the first connecting head (1) in a threaded mode.
3. The domino connector of claim 1, wherein: the outer end surface of the clamping block (23) facing the bottom of the accommodating groove (12) is a spherical surface, and the bottom of the accommodating groove (12) is a spherical surface matched with the outer end surface of the clamping block (23); the outer end face of the clamping block (23) and/or the groove bottom face of the accommodating groove (12) are provided with anti-skid patterns.
4. A domino joint as claimed in claim 3 wherein: the maximum distance between the inner end surface and the outer end surface of the clamping block (23) is smaller than the spherical diameter of the outer end surface of the clamping block (23).
5. The domino connector of claim 1, wherein: the inner side wall of the opening of the accommodating groove (12) is provided with a limiting ring (121) for limiting the clamping block (23) in the accommodating groove (12).
6. The domino connector of claim 5, wherein: the pushing mechanism is arranged on the bottom wall of the accommodating groove (12), and is used for extruding the clamping block (23) on the limiting ring (121) and enabling the clamping block (23) and the spine fixing rod (4) in the first clamping groove (11) to be sequentially overlapped on the side wall of the first connecting head (1) opposite to the side wall provided with the accommodating groove (12).
7. The domino connector of claim 6, wherein: the pushing mechanism is a third jackscrew (3) which is connected to the bottom wall of the accommodating groove (12) in a threaded mode.
8. The domino connector of claim 6, wherein: the inner end surface of the clamping block (23) facing the limiting ring (121) is a spherical surface, and the end surface of the limiting ring (121) facing the clamping block (23) is a spherical surface matched with the inner end surface of the clamping block (23); and anti-skid patterns are arranged on the inner end surface of the clamping block (23) and/or the end surface of the limiting ring (121) facing the clamping block (23).
9. The domino joint of any one of claims 1 to 8, wherein: the second connector (2) is provided with a second clamping groove (24) for accommodating the spine fixing rod (4), a second jackscrew (21) is connected to the side wall of the second connector (2) in a threaded mode, and the second jackscrew (21) is used for extruding the spine fixing rod (4) in the second clamping groove (24) to the other side wall of the second connector (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308243.4A CN109998657B (en) | 2019-04-17 | 2019-04-17 | Domino joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308243.4A CN109998657B (en) | 2019-04-17 | 2019-04-17 | Domino joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109998657A CN109998657A (en) | 2019-07-12 |
| CN109998657B true CN109998657B (en) | 2024-02-13 |
Family
ID=67172476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910308243.4A Active CN109998657B (en) | 2019-04-17 | 2019-04-17 | Domino joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109998657B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113440236A (en) * | 2021-06-22 | 2021-09-28 | 浙江德康医疗器械有限公司 | Domino connection system |
| GB2615886A (en) * | 2021-12-29 | 2023-08-23 | Zimmer Biomet Spine Inc | Rotating rod connectors for spine stabilization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006232403A (en) * | 2005-01-31 | 2006-09-07 | Furukawa Mfg Co Ltd | Method for supplying packing bag with zip fastener, and its apparatus |
| CN202892068U (en) * | 2012-10-26 | 2013-04-24 | 苏州点合医疗科技有限公司 | Superposition type full-height vertebrae former |
| CN107049455A (en) * | 2017-05-05 | 2017-08-18 | 兰州大学 | Easily join domino joint |
| CN108843669A (en) * | 2018-08-01 | 2018-11-20 | 上海斯潘威生物技术有限公司 | A kind of adjustable double tail screws for double stick connection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2967902A4 (en) * | 2013-03-15 | 2016-12-14 | Anand K Agarwal | Spinal rods formed from polymer and hybrid materials and growth rod distraction system including same |
-
2019
- 2019-04-17 CN CN201910308243.4A patent/CN109998657B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006232403A (en) * | 2005-01-31 | 2006-09-07 | Furukawa Mfg Co Ltd | Method for supplying packing bag with zip fastener, and its apparatus |
| CN202892068U (en) * | 2012-10-26 | 2013-04-24 | 苏州点合医疗科技有限公司 | Superposition type full-height vertebrae former |
| CN107049455A (en) * | 2017-05-05 | 2017-08-18 | 兰州大学 | Easily join domino joint |
| CN108843669A (en) * | 2018-08-01 | 2018-11-20 | 上海斯潘威生物技术有限公司 | A kind of adjustable double tail screws for double stick connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109998657A (en) | 2019-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109998657B (en) | Domino joint | |
| CN100553575C (en) | The two clamps that are used for the elastic atresia of external fixator | |
| EP3578264B1 (en) | Pipette tip coupling device | |
| US8636782B2 (en) | Receiving part for receiving a rod for coupling the rod to a bone anchoring element and bone anchoring device with such a receiving part | |
| AU747681B2 (en) | Backbone osteosynthesis system with collar and lock | |
| EP1680035B1 (en) | Linking transconnector for coupling spinal rods | |
| CN105025961B (en) | Lockable syringe assemblies and related apparatus and methods | |
| US9884177B2 (en) | Connector assembly, male connector, and female connector | |
| WO2017034965A1 (en) | Coupling devices for tube sets used with surgical gas delivery systems | |
| US10058356B2 (en) | Offset variable angle connection assembly | |
| US7014222B1 (en) | Tube connection system | |
| US10918418B2 (en) | Spinal implant | |
| US20230380876A1 (en) | Modular bone plate and member of such a modular bone plate | |
| JPH04211794A (en) | Nipple and diffusing and filtering device | |
| CN105042240A (en) | Genderless connector and method of fluid connection | |
| US20230024542A1 (en) | Dual locking polyaxial screw head | |
| US20130160502A1 (en) | Lock for electronic device | |
| US5876072A (en) | Tube connection in particular for connecting two tubular elements of the airframe of a missile | |
| JP2004079425A (en) | Coaxial connector and its component | |
| CN210170150U (en) | Domino joint | |
| CN216951179U (en) | Locking mechanism and endoscope sheath | |
| US20170153212A1 (en) | Compression fitting with coupled ferrule | |
| CN208506674U (en) | The lock solid structure of electronic device | |
| US12044263B2 (en) | Screw element and system for fastening a liquid-conducting line | |
| US10499959B2 (en) | Handling instrument for a bone anchor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |