CN109199560B - Support capable of being spread and supporting bone grafting - Google Patents
Support capable of being spread and supporting bone grafting Download PDFInfo
- Publication number
- CN109199560B CN109199560B CN201811343189.9A CN201811343189A CN109199560B CN 109199560 B CN109199560 B CN 109199560B CN 201811343189 A CN201811343189 A CN 201811343189A CN 109199560 B CN109199560 B CN 109199560B
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- rivet
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- central screw
- rocker
- sliding block
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 118
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 230000035876 healing Effects 0.000 claims description 8
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000602 vitallium Substances 0.000 claims description 4
- 102000007350 Bone Morphogenetic Proteins Human genes 0.000 claims description 3
- 108010007726 Bone Morphogenetic Proteins Proteins 0.000 claims description 3
- 102000004127 Cytokines Human genes 0.000 claims description 3
- 108090000695 Cytokines Proteins 0.000 claims description 3
- 229940112869 bone morphogenetic protein Drugs 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 210000000130 stem cell Anatomy 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 4
- 238000002324 minimally invasive surgery Methods 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 208000010392 Bone Fractures Diseases 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 206010017076 Fracture Diseases 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 210000004446 longitudinal ligament Anatomy 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 239000002639 bone cement Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 206010041569 spinal fracture Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 210000000845 cartilage Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
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- 206010010214 Compression fracture Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010023509 Kyphosis Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 238000012274 Preoperative evaluation Methods 0.000 description 1
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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
- A61B17/7061—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- 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
- A61B17/7094—Solid vertebral fillers; devices for inserting such fillers
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/885—Tools for expanding or compacting bones or discs or cavities therein
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
-
- 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
- A61B2017/564—Methods for bone or joint treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The invention discloses a bracket capable of supporting bone grafting by stretching, which comprises a central screw rod, push plates, sliding blocks, nuts and a connecting component, wherein one end of the central screw rod is provided with threads matched with the nuts, the other end of the central screw rod is provided with a sealing head, the inner side of the sealing head is provided with a first rivet hole, the sliding blocks are sleeved in the central screw rod, the inner sides of the sliding blocks are provided with second rivet holes, the push plates are provided with a plurality of sliding devices, the plurality of push plates are respectively provided with sliding devices, the plurality of push plates form symmetrical states and are distributed in the peripheral direction of the central screw rod, the connecting component is respectively connected with the first rivet hole and the second rivet hole through the sliding devices, the nuts are in threaded connection with the central screw rod, and the sliding blocks can move along the central screw rod under the action of the nuts, and the sliding blocks and the connecting component drive the push plates to stretch outwards or fold inwards by taking the central screw rod as the center. The bone scaffold provided by the invention can realize the functions of opening and closing by utilizing the lever principle, and can meet the requirements in medical minimally invasive surgery.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a repairing device for bone injury, particularly vertebral fracture and bone fusion, and specifically relates to a bracket capable of being spread and supporting bone grafting.
Background
In the case of vertebral fractures, there are a number of ways in which vertebral fractures are currently treated: comprises the following steps of firstly, conservative treatment, absolute bed rest for patients with vertebral body compression less than 1/3, and bed leaving movement after fracture healing; second, percutaneous kyphoplasty is mainly used for patients with osteoporosis, the rear edge of which is not broken and of which is advanced; thirdly, open reset nail rod system internal fixation. The operation is the most common mode, and the operation process is as follows: pedicle screws are respectively placed at the head and tail ends of the injured vertebrae, then screws at the two sides are respectively connected by using longitudinal connecting rods, and screws at the two sides of the head and tail of the injured vertebrae are spread towards the head and tail ends by using a spreader so as to recover the height of the vertebrae and correct kyphosis deformity. Normally, anterior and posterior longitudinal ligaments are attached to the anterior and posterior vertebral bodies, respectively, and the two ligaments are continuous from the cephalad end to the caudal end and are attached to the anterior and posterior edges of all vertebral bodies. And fibrous rings and intervertebral disc tissues are arranged between two adjacent vertebral bodies, and the fibrous rings are attached to the upper and lower edges of the periphery of the vertebral bodies. The mechanism of distraction to restore the vertebral body height is mainly: when the head and tail screws are spread towards the two ends, the anterior longitudinal ligament, the posterior longitudinal ligament and the fibrous ring are also stretched, and the compressed centrum bone blocks are reset by the extrusion and traction forces. In addition, as the vertebral body is mainly cancellous bone, after the vertebral body is compressed and fractured, the cancellous bone is extruded, so that after the vertebral body is unfolded to recover the height of the vertebral body, the inside of the vertebral body is always in an empty state, and along with the progress of the illness state, the vertebral body is filled with scar tissues, so that the strength of the vertebral body is affected. After one year when the patient takes out the rod system there is a risk of fracture again due to insufficient strength.
The fracture with wedge deformation and loss of the vertebral body height is treated by a minimally invasive technical means, the shape and the height of the vertebral body are recovered and maintained in the operation, and the vertebral sequence is reconstructed. Currently, internal fixation devices such as spineJack, expandable cone stents (EVS), intravertebral expandable columns (I-VEP), and the like are implemented. spineJack is a vertebral body spreader, and is applied to spread from a pedicle tunnel to the inside of a vertebral body through an upper push plate and a lower push plate, so that the compressed vertebral body is restored to the shape and the height, and then bone cement is poured into the vertebral body for fixation. However, when the device is spread, the contact surface of the push plate and bone tissue is narrower, and a more uniform spreading and resetting force cannot be provided; in addition, the scaffold itself is not designed to provide bone grafting voids and needs to be fixed by means of bone cement. The expandable vertebral body support (EVS) is a multi-valve expanding vertebral body support made by means of memory alloy performance, and has the greatest advantages that after being implanted into a vertebral body, the support is expanded without external force pushing action, but the support is self-shaped, expanded and used for supporting a fractured vertebral body at the body temperature, so that the degree of the shape recovery of the expandable vertebral body support can be controlled difficultly due to the change of the body temperature, and in addition, the adopted hollowed-out design can be mutually clamped and pressed with cancellous bones in the vertebral body to be occluded when being expanded, and has a better contact surface, but can not provide more uniform supporting force. An inflatable column (I-VEP) in the vertebral body is implanted in the vertebral body through a pedicle tunnel, is expanded up and down through a head end to support the compressed vertebral body, and is injected with bone cement for fixation. However, the opening angle is easily limited by the depth of the vertebral body, the reduction effect is not satisfactory, in addition, the head end of the vertebral body is opened up and down, uneven and larger stress can be generated in the vertebral body due to smaller stress interface of bone tissues, and the effect of the provided supporting force is not good.
In addition, since spinal stability is also important to maintain normal function of the spine, spinal surgery often employs bone grafting fusion to achieve long-term stabilization. Spinal fusion may be defined as the formation of an bony connection between two or more spinal segments following an osteosynthesis procedure. In the case of interbody fusion, the general surgical procedure is divided into an exposure of the intervertebral space; secondly, treating the intervertebral space, in particular to treating the upper cartilage end plate and the lower cartilage end plate of the intervertebral space; thirdly, bone grafting fusion; fourth, intervertebral compression. At present, a general multi-purpose hollow square light-permeable intervertebral fusion device (Cage) containing broken bone blocks is used for bone grafting fusion. The intervertebral fusion can restore the height of the intervertebral space and the spinal column sequence, simultaneously provide the longitudinal support of the intervertebral, improve the stability of internal fixation, and more importantly, can obtain higher bone grafting fusion rate.
Therefore, a bracket which has a simple structure, is convenient to operate and use, can be implanted into a vertebral body or between vertebral bodies through a minimally invasive channel to provide uniform mechanical support for bone healing and bone fusion, can be used for bone grafting, reduces trauma, improves the mechanical strength of wound healing or intervertebral fusion, and improves the curative effect of an operation is needed.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides the bone support which has the advantages of simple structure, convenient operation, uniform expansion of percutaneous minimally invasive channel implantation, bone grafting and high safety, so as to meet the requirements in medical minimally invasive surgery, simplify the surgery operation and improve the surgery curative effect, and in particular relates to the bone support which can expand and support the bone grafting.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a can prop up and prop up support that plants bone, includes central screw rod, push pedal, sliding block, nut and coupling assembling the one end of central screw rod be equipped with nut assorted screw thread, the other end is equipped with the head the inboard of head is equipped with multiunit mutually perpendicular first rivet hole be equipped with the round hole in the sliding block, the sliding block is located through the round hole cover in the central screw rod the inboard of sliding block is equipped with first rivet hole assorted second rivet hole, the push pedal is equipped with a plurality of, is equipped with slider in a plurality of push pedals respectively, and a plurality of push pedals form symmetrical state and distribute in the peripheral direction of central screw rod, wherein coupling assembling passes through slider and is connected with first rivet hole and second rivet hole respectively, the nut passes through the screw thread spiro union in central screw rod, the sliding block can be followed under the effect of nut axial displacement, through the sliding block axial displacement, by coupling assembling drives the push pedal outwards struts or folds inwards with central screw rod as the center.
Further, the bracket capable of supporting the bone grafting is characterized in that two groups of first rivet holes are formed, two groups of second rivet holes matched with the first rivet holes are formed in the inner side of the sliding block, four pushing plates are arranged, sliding devices are respectively arranged in the four pushing plates, and the four pushing plates are symmetrically distributed in the upper direction, the lower direction, the left direction and the right direction of the periphery of the central screw rod.
Further, the support capable of being spread and supporting the bone grafting is characterized in that the sliding device is composed of a plurality of supporting sliding blocks respectively arranged in the inner side face of each push plate, and sliding groove holes matched with the connecting components are formed in the supporting sliding blocks and can enable the connecting components to slide freely.
Further, the support slide block is provided with four, the four support slide blocks are divided into two groups and are arranged in parallel along the length direction of the push plate, the number of the slide slot holes is the same as that of the support slide blocks, and the four slide slot holes longitudinally penetrate through the support slide blocks.
Further, the bracket capable of being spread and supporting the bone grafting comprises a left rivet, a left rocker rivet, a right rocker and a sliding block rivet, the left rivet, the left rocker rivet, the right rocker rivet and the sliding block rivet are all provided with four; the left rocker and the right rocker are identical in structure and are symmetrically distributed in the inner side face of the push plate, positioning grooves are formed in the middle ends of the left rocker and the right rocker, one rivet hole is formed in one end of each positioning groove, and two rivet holes are formed in the other end of each positioning groove; the four left rivets and the four sliding block rivets are equally divided into two groups and are respectively arranged in the corresponding first rivet hole and second rivet hole, the left rocker is connected with the left rivet through one end with one rivet hole, and the right rocker is connected with the sliding block rivet through one end with one rivet hole; the other ends of the left rocker and the right rocker penetrate through one of the rivet holes to be connected in a crossing manner through corresponding left rocker rivets and right rocker rivets respectively; the other rivet hole at the same end penetrates through the positioning groove through the left rocker rivet and the right rocker rivet to be fixedly connected and form a rotating fulcrum; the left rocker rivet and the right rocker rivet are respectively sleeved in a chute hole in the inner side surface of the corresponding push plate and can freely slide in the chute; the central screw rod, the push plate and the connecting assembly are connected with corresponding rocking bars through rivets to form an arm, so that a three-layer linkage structure which is unfolded or folded in the four directions of up, down, left and right by taking the central screw rod as the center is formed.
Furthermore, the support capable of supporting the bone grafting is characterized in that two concave grooves are formed in the outer side face of the sliding block, two limiting clamping blocks extending towards the direction of the sliding block are arranged in the nut, the limiting clamping blocks are matched with the concave grooves, and the nut is inserted into or separated from the concave grooves through the limiting clamping blocks, so that the nut and the sliding block are fixedly connected or separated.
Furthermore, the support capable of supporting the bone grafting is provided with a plurality of hollow bone grafting grooves in the push plate, bone grafting materials are filled into the bone grafting grooves and grow into surrounding bone tissues, the contact area is increased, and the healing of bones is promoted.
Further, the support capable of supporting the bone grafting is provided with three bone grafting grooves, the three bone grafting grooves are respectively distributed in the middle part and two ends of the push plate, the bone grafting grooves in the middle part are provided with strip-shaped through hole structures, and the bone grafting grooves in the two ends are symmetrically distributed and are provided with special-shaped hole structures.
Further, the invention provides a bracket capable of supporting bone grafting, wherein the central screw rod, the push plate, the sliding block, the nut and the connecting component can be made of medical titanium alloy or cobalt chromium molybdenum alloy materials or other materials to form the bone bracket, and when the bone bracket is used, bone morphogenetic proteins, stem cells or cytokines for promoting bone grafting growth can be soaked or injected.
Further, the support capable of supporting the bone grafting is characterized in that an axial through hole is formed in the center screw rod along the direction of the sealing head of the center screw rod, the bone grafting is conducted into the center screw rod through the axial through hole, and a plurality of material adding grooves communicated with the axial through hole are further formed in the side face of the center screw rod.
Compared with the prior art, the bracket capable of being spread and supporting the bone grafting has the beneficial effects that: firstly, eliminating surgical contraindications through full preoperative evaluation, and determining the model of a bracket required by a patient; in the operation process, a percutaneous transpedicular channel is established to reach the inside of the center of a fractured vertebral body, an undeployed bone bracket is implanted through the channel to reach a proper position in the vertebral body, the bone bracket is propped up by rotating a nut, the compressed fractured vertebral body is enabled to recover the height and the shape, and bone grafting can be carried out in the bracket after the bone bracket is propped up to realize the permanent bone fusion of the bone bracket and the vertebral body. The method is specifically characterized in that:
1. the minimally invasive implantation of the percutaneous minimally invasive channel can realize the treatment of the patient, the bone scaffold can be uniformly spread on the upper, lower, left and right sides after being implanted into the vertebral body through the minimally invasive channel, the contact surface between the surface of the scaffold and the bone tissue interface is enlarged, and the problems that the existing internal fixator cannot provide uniform spreading and the interface stress between the surface of the scaffold and the bone tissue is overlarge in application are solved;
2. the final stability of the fracture mainly aims at realizing bone healing, bone grafting can be carried out in a central screw rod and between pushing plates when the fracture is implanted into a vertebral body, so that conditions are created for healing the injured vertebrae, and normal form healing of the injured vertebrae is realized to the greatest extent;
3. the bone support adopts a thread adjusting principle, realizes push plate expansion in four directions in a spiral process, can realize fracture reduction on a compressed vertebral body and provide uniform supporting force, and has simple adjustment operation and simple tool;
4. the bone scaffold is made of medical titanium alloy or cobalt-chromium-molybdenum alloy material, can realize internal support of vertebral body and bone grafting, provides immediate stability after operation, is fused with vertebral body formation permanent bone and gives consideration to long-term stability.
In summary, the bracket capable of being spread and supporting the bone grafting is compact in structure, can meet the requirements in medical minimally invasive surgery, can greatly improve the working efficiency, and is suitable for popularization and application by skillfully utilizing the lever principle and realizing the functions of opening and folding in a very small space.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the center screw configuration of FIG. 1;
FIG. 3 is a schematic view of the push plate of FIG. 1;
FIG. 4 is a schematic view of the left and right rockers of FIG. 1;
FIG. 5 is a schematic view of the slider structure of FIG. 1;
FIG. 6 is a schematic view of the nut of FIG. 1;
FIG. 7 is a schematic view of the structure of the stent of the present invention when closed during use;
FIG. 8 is a schematic view of the stent of the present invention in a deployed configuration;
fig. 9 is a schematic flow chart of the stent of the present invention when applied.
The figure shows: 1-center screw, 101-threads, 102-end socket, 103-first rivet hole, 104-charging groove, 2-left rivet, 3-left rocker, 4-left rocker rivet, 5-left and right rocker rivet, 6-push plate, 601-supporting slide block, 602-slide groove hole, 603-bone grafting groove, 7-right rocker rivet, 8-right rocker, 9-slide block, 901-round hole, 902-second rivet hole, 903-concave groove, 10-slide block rivet, 11-nut, 1101-limit fixture block, 12-rivet hole and 13-positioning groove.
Detailed Description
As shown in fig. 1 to 6, the support capable of supporting bone grafting by spreading according to the present invention comprises a central screw 1, a push plate 6, a sliding block 9, a nut 11 and a connecting component, wherein one end of the central screw 1 is provided with threads 101 matched with the nut 11, the other end is provided with a sealing head 102, the inner side of the sealing head 102 is provided with a plurality of groups of mutually perpendicular first rivet holes 103, a round hole 901 is provided in the sliding block 9, the sliding block 9 is sleeved in the central screw 1 through the round hole 901, the inner side of the sliding block 9 is provided with a second rivet hole 902 matched with the first rivet hole 103, the push plate 6 is provided with a plurality of sliding devices, the push plates 6 are respectively provided with a plurality of push plates 6 to form a symmetrical state and distributed in the peripheral direction of the central screw 1, the connecting component is respectively connected with the first rivet holes 103 and the second rivet holes 902 through the sliding devices, the nut 11 is screwed in the central screw 1 through the threads 101, the sliding block 9 can move axially along the central screw 1 under the action of the nut 11, and the sliding block 9 can be spread axially or moved axially towards the center screw 1 through the push plate 6.
Further, the first rivet holes 103 are provided with two groups, the inner side of the sliding block 9 is provided with two groups of second rivet holes 902 matched with the first rivet holes 103, the number of the pushing plates 6 is four, sliding devices are respectively arranged in the four pushing plates 6, and the four pushing plates 6 are symmetrically distributed in the upper, lower, left and right directions of the periphery of the central screw 1.
Further, the support frame capable of supporting the bone grafting frame is characterized in that the sliding device is composed of a plurality of supporting blocks 601 respectively arranged in the inner side face of each push plate 6, and a sliding groove hole 602 matched with the connecting component is arranged in each supporting block 601, and the sliding groove hole 602 can enable the connecting component to slide freely.
Further, in the support frame capable of supporting bone grafting, the four support blocks 601 are arranged, the four support blocks 601 are divided into two groups and are arranged in parallel along the length direction of the push plate 6, the number of the sliding groove holes 602 is the same as that of the support blocks 601, and the four sliding groove holes 602 longitudinally penetrate through the support blocks 601.
Further, the bracket capable of being spread and supporting the bone grafting comprises a left rivet 2, a left rocker 3, a left rocker rivet 4, a left rocker rivet 5, a right rocker rivet 7, a right rocker 8 and a sliding block rivet 10, wherein four parts are arranged on the left rivet 2, the left rocker 3, the left rocker rivet 4, the left rocker rivet 5, the right rocker rivet 7, the right rocker 8 and the sliding block rivet 10; the left rocker 3 and the right rocker 8 have the same structure and are symmetrically distributed in the inner side surface of the push plate 6, positioning grooves 13 are formed in the middle ends of the left rocker 3 and the right rocker 8, one rivet hole 12 is formed in one end of each positioning groove, and two rivet holes 12 are formed in the other end of each positioning groove; the four left rivets 2 and the four slider rivets 10 are divided into two groups and are respectively arranged in the corresponding first rivet hole 103 and second rivet hole 902, the left rocker 3 is connected with the left rivet 2 through one end with one rivet hole 12, and the right rocker 8 is connected with the slider rivets 10 through one end with one rivet hole 12; the other ends of the left rocker 3 and the right rocker 8 respectively pass through one rivet hole 12 through the corresponding left rocker rivet 4 and the right rocker rivet 7 to be mutually and crosswise connected; the other rivet hole 12 at the same end is connected and fixed through the positioning groove 13 by the left rocker rivet 5 and the right rocker rivet 5 to form a rotating fulcrum; wherein the left rocker rivet 4 and the right rocker rivet 7 are respectively sleeved in a chute hole 602 in the inner side surface of the corresponding push plate 6 and can freely slide in the chute hole 602; the central screw 1, the push plate 6 and the connecting component are connected with corresponding rocking bars through rivets to form arms, so that a three-layer linkage structure which is unfolded or folded in the four directions of up, down, left and right by taking the central screw 1 as the center is formed.
Further, the bracket capable of supporting bone grafting in a spreading manner according to the present invention, wherein two concave grooves 903 are provided on the outer side surface of the sliding block 9, two limiting clamping blocks 1101 extending toward the sliding block 9 are provided in the nut 11, the limiting clamping blocks 1101 are matched with the concave grooves 903, and the nut 11 is inserted into or separated from the concave grooves 903 through the limiting clamping blocks 1101, so as to achieve a fixed connection or separation state between the nut 11 and the sliding block 9.
Further, the support capable of supporting bone grafting is provided with a plurality of hollow bone grafting grooves 603 in the push plate 6, and bone grafting materials are filled into the bone grafting grooves 603 and grow into surrounding bone tissues, so that the contact area is increased, and the healing of bones is promoted.
Further, according to the bracket capable of supporting bone grafting, three bone grafting grooves 603 are provided, and the three bone grafting grooves 603 are respectively distributed at the middle part and two ends of the push plate 6, wherein the bone grafting grooves 603 at the middle part are provided with a bar-shaped through hole structure, and the bone grafting grooves 603 at the two ends are symmetrically distributed and are provided with a special-shaped hole structure.
Further, the invention provides a bracket capable of supporting bone grafting, wherein the central screw 1, the push plate 6, the sliding block 9, the nut 11 and the connecting component can be made of medical titanium alloy or cobalt chromium molybdenum alloy materials or other materials to form the bone bracket, and when the bone bracket is used, bone morphogenetic proteins, stem cells or cytokines for promoting bone grafting growth can be soaked or injected.
Further, the support capable of supporting bone grafting is provided with an axial through hole in the center screw 1 along the direction of the sealing head 102, bone grafting is performed in the center screw 1 through the axial through hole, and a plurality of material increasing grooves 104 communicated with the axial through hole are further arranged on the side surface of the center screw 1.
As shown in fig. 7 to 9, in the practical application process, an axial through hole (not shown in the drawing) is provided in the central screw 1 along the direction of the sealing head 102, so that bone is planted in the central screw 1 through the axial through hole, a plurality of reinforcing grooves 104 communicated with the axial through hole are further provided on the side surface of the central screw 1, bone is planted in the central screw 1 through the axial through hole, and because the reinforcing grooves 104 are communicated with the bone planting grooves 603 in the push plate 6, the injected bone can permeate out to the surrounding through the bone planting grooves 603, the surface area and the contact area can be increased through the provided bone planting grooves 603, and bone tissues can grow into the bracket, so that the bone bracket and the vertebral body are permanently fused. The specific working principle is as follows: in the opening process, as shown by the arrow direction in fig. 7, the nut 11 is rotated to make the nut 11 rotate relative to the central screw 1, because the thread 101 matched with the nut 11 is arranged in the central screw 1, under the action of the thread 101, the nut 11 drives the sliding block 9 to slide on the central screw 1, because four right rockers 8 are fixed on the sliding block 9, when the sliding block 9 moves axially along the central screw 1, the sliding block 9 drives the right rockers 8 to move leftwards together, and because the other ends of the left rocker 3 and the right rocker 8 are respectively connected in a cross manner through one of the rivet holes 12 by corresponding left rocker rivets 4 and right rocker rivets 7; the other rivet hole 12 at the same end is connected and fixed through the positioning groove 13 by the left rocker rivet 5 and the right rocker rivet 5 to form a rotating fulcrum; wherein the left rocker rivet 4 and the right rocker rivet 7 are respectively sleeved in a chute hole 602 in the inner side surface of the corresponding push plate 6 and can freely slide in the chute 602; the central screw 1, the push plate 6 and the connecting component are connected with corresponding rocking bars through rivets to form arms, so that a three-layer linkage structure which is unfolded or folded in the four directions of up, down, left and right by taking the central screw 1 as the center is formed. Under the action of the right rocker 8 and the left rocker 3, the right rocker 8 and the left rocker 3 can move like scissors, and as the left rocker rivet 4 and the right rocker rivet 7 are respectively fixed on the left rocker 3 and the right rocker 8, the corresponding push plate 6 is supported to move outwards through the left rocker rivet 4 and the right rocker rivet 7, so that the push plate 6 is pushed open, and finally the aim of opening four sides is achieved. The recovery movement is opposite to the opening movement, and the nut 11 is reversed, as shown by the arrow direction in fig. 8, because two limit clamping blocks 1101 matched with the concave grooves 903 are arranged on the nut 11, the sliding block 9 can be pulled back through the limit clamping blocks 1101, so that the left rocker 3 and the right rocker 8 can return.
The specific operation process of the compression fracture is shown in fig. 9, and the model of the bracket required by the patient is determined by fully evaluating before operation and eliminating the operation contraindications; then in the operation process, a percutaneous transpedicular channel is established to reach the inside of the center of a fractured vertebral body, an undeployed bone bracket is implanted through the channel to reach a proper position in the vertebral body, the bone bracket is propped up by rotating a nut, the fractured vertebral body is compressed to recover the height and the shape, finally, a bone grafting tube is introduced, granular bone can be implanted in the bracket after the bone grafting tube is propped up, and bone grafting operation is carried out, so that the permanent bone fusion of the bracket and the vertebral body is realized.
In summary, the bone scaffold provided by the invention skillfully utilizes the lever principle to realize the functions of opening and closing in a very small space, has a compact structure, can meet the requirements in medical minimally invasive surgery, can greatly improve the working efficiency, and is suitable for popularization and application.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A support capable of being spread and supporting bone grafting, which is characterized in that: the nut comprises a central screw (1), a push plate (6), a sliding block (9), a nut (11) and a connecting component, wherein one end of the central screw (1) is provided with threads (101) matched with the nut (11), the other end of the central screw is provided with a sealing head (102), the inner side of the sealing head (102) is provided with a plurality of groups of mutually perpendicular first rivet holes (103), round holes (901) are formed in the sliding block (9), the sliding block (9) is sleeved in the central screw (1) through the round holes (901), the inner side of the sliding block (9) is provided with a second rivet hole (902) matched with the first rivet hole (103), the push plate (6) is provided with a plurality of sliding devices, the plurality of push plates (6) are distributed in the peripheral direction of the central screw (1) in a symmetrical state, the connecting component is respectively connected with the first rivet holes (103) and the second rivet holes (902) through the sliding devices, the nut (11) is screwed in the central screw (1) through the threads (101), the nut (11) can axially move under the action of the sliding block (9), the push plate (6) is driven by the connecting component to be opened outwards or closed inwards by taking the central screw rod (1) as the center;
the sliding block comprises a central screw rod (1), a first rivet hole (103) and a second rivet hole (902), wherein the first rivet hole (103) is provided with two groups, the inner side of the sliding block (9) is provided with two groups of second rivet holes (902) matched with the first rivet hole (103), four pushing plates (6) are provided, sliding devices are respectively arranged in the four pushing plates (6), and the four pushing plates (6) form a symmetrical state and are distributed in the upper and lower directions, the left and the right directions of the periphery of the central screw rod (1);
the sliding device consists of a plurality of supporting sliding blocks (601) which are respectively arranged in the inner side face of each push plate (6), and a sliding groove hole (602) matched with the connecting component is arranged in each supporting sliding block (601), and the sliding groove hole (602) can enable the connecting component to slide freely;
the four support slide blocks (601) are arranged, the four support slide blocks (601) are divided into two groups and are arranged in parallel along the length direction of the push plate (6), the number of the slide groove holes (602) is the same as that of the support slide blocks (601), and the four slide groove holes (602) longitudinally penetrate through the support slide blocks (601);
the connecting assembly comprises a left rivet (2), a left rocker (3), a left rocker rivet (4), a left rocker rivet (5), a right rocker rivet (7), a right rocker rivet (8) and a sliding block rivet (10), wherein the left rivet (2), the left rocker (3), the left rocker rivet (4), the left rocker rivet (5), the right rocker rivet (7), the right rocker rivet (8) and the sliding block rivet (10) are all provided with four parts; the left rocker (3) and the right rocker (8) are identical in structure and are symmetrically distributed in the inner side face of the push plate (6), positioning grooves (13) are formed in the middle ends of the left rocker (3) and the right rocker (8), one rivet hole (12) is formed in one end of each positioning groove, and two rivet holes (12) are formed in the other end of each positioning groove; the four left rivets (2) and the four sliding block rivets (10) are equally divided into two groups and are respectively arranged in the corresponding first rivet hole (103) and second rivet hole (902), the left rocker (3) is connected with the left rivets (2) through one end with one rivet hole (12), and the right rocker (8) is connected with the sliding block rivets (10) through one end with one rivet hole (12); the other ends of the left rocker (3) and the right rocker (8) are respectively connected with each other in a crossing way through one of the rivet holes (12) by corresponding left rocker rivets (4) and right rocker rivets (7); the other rivet hole (12) at the same end is connected and fixed through the left rocker rivet (5) and the right rocker rivet (5) passing through the positioning groove (13) to form a rotating fulcrum; the left rocker rivet (4) and the right rocker rivet (7) are respectively sleeved in a chute hole (602) in the inner side surface of the corresponding push plate (6) and can freely slide in the chute hole (602); the central screw (1), the push plate (6) and the connecting component are connected with corresponding rocking bars through rivets to form an arm, so that a three-layer linkage structure which is unfolded or folded in four directions of up, down, left and right by taking the central screw (1) as a center is formed.
2. A distractable bone graft supporting frame according to claim 1, wherein: the nut is characterized in that two concave grooves (903) are formed in the outer side face of the sliding block (9), two limiting clamping blocks (1101) extending towards the direction of the sliding block (9) are arranged in the nut (11), the limiting clamping blocks (1101) are matched with the concave grooves (903), and the nut (11) is inserted into or separated from the concave grooves (903) through the limiting clamping blocks (1101) to achieve a fixed connection or separation state between the nut (11) and the sliding block (9).
3. A distractable bone graft supporting frame according to claim 1, wherein: a plurality of hollow bone grafting grooves (603) are formed in the pushing plate (6), bone grafting materials are filled into the bone grafting grooves (603) and grow into surrounding bone tissues, the contact area is increased, and the healing of bones is promoted.
4. A distractable bone graft supporting frame according to claim 3, wherein: the bone grafting grooves (603) are arranged in three, the three bone grafting grooves (603) are respectively distributed in the middle part and two ends of the push plate (6), wherein the bone grafting grooves (603) located in the middle part are arranged in a strip-shaped through hole structure, and the bone grafting grooves (603) located at the two ends are symmetrically distributed and are arranged in a special-shaped hole structure.
5. A distractable bone graft supporting frame according to claim 1, wherein: the central screw (1), the push plate (6), the sliding block (9), the nut (11) and the connecting component can be made of medical titanium alloy or cobalt chromium molybdenum alloy materials to form the bracket, and bone morphogenetic protein, stem cells or cytokines for promoting bone grafting growth can be soaked or injected into the bracket when the bracket is used.
6. A distractable bone graft supporting frame according to claim 1, wherein: an axial through hole is formed in the center screw (1) along the direction of the sealing head (102), bone is planted in the center screw (1) through the axial through hole, and a plurality of material adding grooves (104) communicated with the axial through hole are further formed in the side face of the center screw (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811343189.9A CN109199560B (en) | 2018-11-13 | 2018-11-13 | Support capable of being spread and supporting bone grafting |
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| CN201811343189.9A CN109199560B (en) | 2018-11-13 | 2018-11-13 | Support capable of being spread and supporting bone grafting |
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| CN109199560B true CN109199560B (en) | 2023-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109820626B (en) * | 2019-03-15 | 2023-11-14 | 博能华医疗器械（北京）有限公司 | Four-way expansion interbody fusion cage |
| CN110495943A (en) * | 2019-09-19 | 2019-11-26 | 遵义医学院附属医院 | A kind of minimal invasion reduction of the fracture device |
| CN111839830B (en) * | 2020-07-23 | 2021-09-14 | 山东第一医科大学附属省立医院(山东省立医院) | Fixable intervertebral fusion cage under self-guiding distraction mirror |
| CN111759436B (en) * | 2020-07-23 | 2021-09-21 | 山东第一医科大学附属省立医院(山东省立医院) | Self-guiding four-side expandable under-mirror bone grafting interbody fusion cage |
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| CN104023675A (en) * | 2011-12-19 | 2014-09-03 | 华沙整形外科股份有限公司 | Expandable Interbody Implant And Methods Of Use |
| EP2777630A1 (en) * | 2013-03-13 | 2014-09-17 | Life Spine, Inc. | Expandable spinal interbody and intravertebral body devices |
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