CN113576594A - Aiming positioning device, pressure reducing device and bone grafting device - Google Patents

Aiming positioning device, pressure reducing device and bone grafting device Download PDF

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Publication number
CN113576594A
CN113576594A CN202110945601.XA CN202110945601A CN113576594A CN 113576594 A CN113576594 A CN 113576594A CN 202110945601 A CN202110945601 A CN 202110945601A CN 113576594 A CN113576594 A CN 113576594A
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China
Prior art keywords
positioning
aiming
bone
barrel
diameter portion
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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.)
Withdrawn
Application number
CN202110945601.XA
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Chinese (zh)
Inventor
刘飞
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First Hospital Of Qinhuangdao
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First Hospital Of Qinhuangdao
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Publication date
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Priority to CN202110945601.XA priority Critical patent/CN113576594A/en
Publication of CN113576594A publication Critical patent/CN113576594A/en
Withdrawn legal-status Critical Current

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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
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/164—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans intramedullary
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1742—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip
    • 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
    • A61F2/28—Bones
    • 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
    • A61F2/28—Bones
    • A61F2002/2825—Femur
    • 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
    • A61F2/28—Bones
    • A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Dentistry (AREA)
  • Cardiology (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

The invention relates to an aiming positioning device, a decompression device and a bone grafting device. The aiming positioning device comprises a positioning barrel and at least one positioning needle, wherein a plurality of positioning holes for the positioning needles to penetrate through are formed in the positioning barrel, the positioning holes are formed in the length direction of the positioning barrel, two ends of each positioning hole penetrate through two end faces of the positioning barrel, and two adjacent positioning holes are parallel to each other or are arranged in an angle mode. The pressure reduction device comprises the aiming positioning device and a drill bit. The bone grafting device comprises the aiming positioning device, a pressure reducing device, an implantation sleeve and an arthroscope. The aiming positioning device, the pressure reducing device and the bone grafting device. Can reduce the times of fluoroscopy, reduce the trauma of the operation and improve the efficiency and the reliability of the operation.

Description

Aiming positioning device, pressure reducing device and bone grafting device
Technical Field
The invention relates to the field of medical instruments, in particular to an aiming and positioning device, a decompression device and a bone grafting device.
Background
The femoral head is round, occupies about 2/3 parts of a sphere, is completely covered by articular cartilage, and has a small socket, called femoral head concavity, at the top of the socket, which is the femoral head ligament attachment part, so that the femoral head can obtain a small amount of blood supply.
At present, the treatment of femoral head necrosis is mainly hip protection treatment and is also the first choice treatment method. The hip protection treatment method comprises drug treatment, operation treatment, physical treatment and the like. The medical treatment comprises traditional Chinese medicine and western medicine, the physical treatment can relieve symptoms in the early stage of the disease, and the operation treatment comprises external shock wave, marrow core decompression, multiple drilling decompression, fibula graft with blood vessel, free fibula graft, femoral head inversion graft, iliac pedicle graft with blood vessel, osteotomy and tantalum rod implantation. The core decompression is one of the methods for treating femoral head necrosis, and is the basic treatment of other treatment methods, and the inner pressure is relieved by drilling the femoral head of an early patient, so that the aim of controlling the disease development is fulfilled.
The traditional core decompression method usually needs multiple times of fluoroscopy and multiple times of inserting kirschner wires for positioning so as to determine the position and the depth of a drilled hole. The number of times of fluoroscopy is large, the operation wound is large, and the time is long. The operation of the target area can not be carried out under direct vision, and the operation is blind and incomplete and inaccurate.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide an aiming fixture, a decompression device and a bone grafting device, which can reduce the number of fluoroscopy, reduce the trauma of the operation, and improve the efficiency and reliability of the operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
the aiming positioning device comprises a positioning barrel and at least one positioning needle, wherein a plurality of positioning holes for the positioning needles to penetrate through are formed in the positioning barrel, the positioning holes are formed in the length direction of the positioning barrel, two ends of each positioning hole penetrate through two end faces of the positioning barrel, and two adjacent positioning holes are mutually parallel and/or are arranged at a set angle.
Further, the positioning needle comprises two.
Furthermore, a handle is fixedly arranged on the positioning cylinder.
Furthermore, one of the positioning holes is located at the center of the positioning cylinder, and the axis of the positioning cylinder passes through the center of the positioning hole.
Furthermore, one end of the positioning cylinder is fixedly provided with a dial for measuring the rotating angle of the positioning cylinder.
A pressure reducing device comprises the aiming and positioning device and a drill bit, wherein the drill bit is a hollow trephine, and the drill bit is sleeved outside the positioning needle and used for drilling a hole in a bone to form a tunnel.
Further, the drill bit comprises a first diameter portion and a second diameter portion, the inner diameter of the first diameter portion is smaller than that of the second diameter portion, the first diameter portion is used for allowing the positioning needle to penetrate through and support the positioning needle, and the positioning needle penetrates through the first diameter portion and the second diameter portion in sequence.
The bone implantation device comprises the pressure reduction device, an implantation sleeve and a funnel, wherein the implantation sleeve is inserted into the tunnel, and one end of the funnel is inserted into the sleeve and used for conveying bone tissues.
Furthermore, a partition board is arranged in the sleeve, the partition board divides the sleeve into a working area and an observation area, the working area is used for inserting the funnel and conveying bone tissues, and the observation area is used for inserting the arthroscope.
Further, the partition is a transparent partition.
Due to the adoption of the technical scheme, the invention has the following advantages: the aiming positioning device, the decompression device and the bone grafting device provided by the invention can reduce the number of times of perspective, reduce the trauma of the operation and improve the efficiency and reliability of the operation.
Drawings
FIG. 1 is a schematic view of a femoral head and bone and the positioning of a bore in the bone;
FIG. 2 is a cross-sectional view of an aiming feature provided in accordance with an embodiment of the present invention;
FIG. 3 is a side view of the aiming fixture;
FIG. 4 is a perspective view of the positioning cylinder in the direction of the bone;
FIG. 5 is a view of the drill bit in use;
FIG. 6 is a view of the implant sleeve in use;
FIG. 7 is a cross-sectional view of an implant sleeve;
description of reference numerals:
1-positioning cylinder, 2-dial, 3-positioning hole, 4-first positioning needle, 5-handle, 6-hollow trephine, 7-second positioning needle, 8-implantation sleeve, 9-funnel, 10-bone tissue, 11-arthroscope, 12-clapboard, 81-working area, 82-observation area, 13-first positioning hole, 14-target hole, 31-first positioning hole, 32-third positioning hole, 33-second positioning hole and 34-fourth positioning hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a bone grafting device, which is mainly used for accurate neck positioning of a femoral head 100 and injection of a reduced pressure bone graft. It is to be understood that the bone grafting device provided by the invention is not limited to the use of femoral head neck position, and other bone position treatments are also applicable.
The bone grafting device comprises an aiming positioning device, a drill bit 6, an implantation sleeve 8 and a funnel 9. The aiming and positioning device is used for accurately aiming and positioning the part needing to be treated, and the drill bit 6 is used for drilling and reducing pressure after aiming the part needing to be treated. Finally, the bone tissue 10 is implanted into the part needing to be treated by inserting the funnel 9 and the implantation sleeve 8 into the drilling tunnel, thereby completing the treatment.
As a preferred embodiment, the aiming positioning device includes a positioning cylinder 1 and a positioning needle, a plurality of positioning holes 3 for the positioning needle to pass through are formed in the positioning cylinder 1, the positioning holes 3 are formed along the length direction of the positioning cylinder 1, two ends of each positioning hole 3 penetrate through two end surfaces of the positioning cylinder 1, and two adjacent positioning holes 3 are parallel to each other and/or form an included angle α.
When the aiming positioning device is used, a first positioning needle 4 is inserted into a bone 100, perspective is performed, and the distance and the angle between a target position and the insertion position of the first positioning needle 4 are calculated according to the perspective result; then, the positioning cylinder 1 is sleeved outside the first positioning needle 4, the first positioning needle 4 penetrates through one positioning hole, the positioning cylinder 1 is rotated by taking the first positioning hole as a center, so that the other positioning hole 3 on the positioning cylinder 1 is positioned at a target position, and the second positioning needle 4 is inserted into the target position through the other positioning hole 3, so that the aiming and the positioning of the part needing to be treated are completed.
As shown in fig. 1 and fig. 3, for example, four positioning holes 3 are formed in the positioning tube 1, a first positioning hole 31 is used for the first positioning needle 4 to be inserted through, and is located at the original position, a distance L between a second positioning hole 33 and the first positioning hole 31 is 2mm, and the two positioning holes are arranged in parallel, a distance L between a third positioning hole 32 and the first positioning hole 31 at one end of the positioning tube 1 facing the bone 100 is 4mm, and an included angle α ═ 10 ° is formed therebetween, a distance L between a fourth positioning hole 34 and the first positioning hole 31 at one end of the positioning sleeve facing the bone 100 is 4mm, and an included angle α ═ 5 ° is formed therebetween.
When the distance between the target drilling hole BB 'and the first drilling hole AA' is measured to be 2mm through perspective and the distance between the target drilling hole BB 'and the first drilling hole AA' is horizontal, only the first positioning needle 4 needs to be sleeved in the first positioning hole 31, then the positioning cylinder 1 is rotated by taking the first positioning needle 31 as the circle center, and after the second positioning hole 33 is aligned with the target position, the second positioning needle 7 is inserted into the second positioning hole 33 to complete drilling;
when the distance between the target drill hole CC 'and the first drill hole AA' is measured to be 4mm by perspective and an included angle of 10 ° is formed therebetween, the positioning cylinder 1 is rotated until the third positioning hole 32 is aligned with the target position, and then the second positioning pin 7 is inserted through the third positioning hole 32 to complete the drilling of the target hole, and the target hole and the first drill hole 31 form an included angle of 10 ° and the distance is 4 mm.
Similarly, when the distance between the target drilled hole and the first drilled hole is 4mm and an included angle of 5 ° is formed therebetween as measured by fluoroscopy, the positioning cylinder is rotated until the fourth positioning hole 34 is aligned with the target position, and then the second positioning pin is inserted through the fourth positioning hole 34 to complete the drilling of the target hole, and the target hole and the first drilled hole form an included angle of 5 ° and the distance is 4 mm.
As shown in fig. 4, preferably, one of the positioning holes is located at the center of the positioning cylinder 1 for the first positioning needle 4 to be inserted through, so that the origin coordinate is located at the center of the positioning cylinder 1. When the first positioning needle 4 passes through the positioning hole at the center of the circle, the positioning cylinder 1 is rotated around the center of the circle until the other positioning hole is rotated to be aligned with the target position, and the second positioning needle 7 is inserted into the other positioning hole and inserted into the bone, so that the positioning is completed.
As shown in fig. 4, further, when the first positioning hole is located at the center position, for better positioning, a dial 2 is fixedly installed at one end of the positioning cylinder 1 for measuring the rotation angle of the positioning cylinder 1. When the first positioning pin 4 is inserted into the first positioning hole 13 of the positioning cylinder 1, the distance between the target position and the central hole is measured by perspective to be 4mm, and meanwhile, when the lens measures an included angle beta of 45 degrees between the lens and the first positioning pin 4 in a projection plane, the position of the 45-degree angle on the dial is marked, and then the positioning cylinder 1 is rotated to enable the third positioning hole to be rotated to be aligned with the marked position, so that the positioning is completed.
In order to facilitate the rotating operation, a handle 5 is fixedly arranged on the positioning barrel 1.
As shown in fig. 5, the drill bit 6 is sleeved outside the second positioning pin 7 and is used for drilling a hole in the bone to form a tunnel. The drill bit 6 is preferably a hollow trephine. In the present invention, the drill bit 6 is preferably a hollow trephine for expanding a bone tunnel while retaining a portion of bone. The remaining bone mass may be used to fill the necrotic area.
According to the invention, after the second positioning needle 7 is used for accurate aiming and positioning, the hollow trephine 6 is sleeved on the second positioning needle 7, and drilling pressure reduction treatment is carried out along a target area. The bone reserved in the middle is used for filling the necrotic area, and the treatment effect is improved.
In order to make the drill bit 6 capable of performing forward reaming along a target direction and position during drilling, the drill bit 6 comprises a first diameter part 61 and a second diameter part 62, wherein the inner diameter of the first diameter part 61 is smaller than that of the second diameter part 62, the first diameter part 61 is used for allowing the second positioning needle 7 to pass through and supporting the second positioning needle 7, and the second positioning needle passes through the first diameter part 61 and the second diameter part 62 in sequence to perform drilling. Therefore, in the present invention, the diameter of the drill 6 is set to include different diameter portions, so that the second positioning pin 7 functions as a better positioning guide, thereby improving the reliability of the treatment.
As shown in fig. 6 and 7, in order to facilitate bone grafting treatment of the necrotic region of bone, the bone grafting device provided by the present invention further comprises an implantation sleeve 8 and a funnel 9, wherein the implantation sleeve 8 is inserted into the tunnel, and one end of the funnel 9 is inserted into the sleeve 8 for transporting bone tissue 10. When the drill bit is used, the drill bit 6 is pulled out after drilling, and a tunnel is formed in the bone; the sleeve 8 is inserted into the tunnel and the funnel 9 is inserted into the implantation sleeve 8 to push bone tissue 10 into the bone.
In order to observe the condition of the operation process conveniently and adjust the operation action at any time, a partition plate 12 is arranged in the sleeve 8, the sleeve 8 is divided into a working area 81 and an observation area 82 by the partition plate 12, the working area is used for inserting the funnel 9 and conveying bone tissues 10, the observation area 82 is used for inserting the arthroscope 11, the arthroscope 11 is inserted into the observation area 82 and used for detecting the internal condition of the bone, the detected result is transmitted to a computer for displaying, and the operation staff can adjust the operation action by observing the internal condition.
Preferably, the partition 12 is a transparent partition.
As another preferred embodiment of the present invention, there is also provided a reduced pressure bone grafting method including the steps of:
(1) inserting a first positioning needle 4 into the bone, then performing perspective and calculating the distance and the angle between the target position and the inserting position of the first positioning needle 4 according to the perspective result;
(2) sleeving the positioning cylinder 1 outside the first positioning needle 4, enabling the first positioning needle 4 to penetrate through one positioning hole 3, rotating the positioning cylinder 1 to enable the other positioning hole on the positioning cylinder 1 to be located at a target position, and inserting a second positioning needle 7 at the target position through the other positioning hole;
(3) pulling out the positioning cylinder 1 and the first positioning needle 4;
(4) sleeving the hollow trephine 6 outside the second positioning needle 7 and drilling into a bone for decompression;
(5) after drilling, pulling out the drill bit 6, and forming a tunnel in the bone;
(6) the implantation sleeve 8 is inserted into the tunnel, the funnel 9 is inserted into the working area 81, the bone is pushed into the bone through the funnel 9, meanwhile, the arthroscope 11 is inserted into the observation area 82 for detecting the internal condition of the bone, the detection result is transmitted to a computer for displaying, and an operation operator adjusts the operation action by observing the internal condition of the bone, so that the bone implantation process is accurately completed.
The invention can reduce the number of times of perspective, reduce the trauma of the operation and improve the efficiency and the reliability of the operation by the aiming and positioning device, the decompression device and the bone grafting device.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The aiming positioning device is characterized by comprising a positioning barrel and at least one positioning needle, wherein a plurality of positioning holes for the positioning needles to pass through are formed in the positioning barrel, the positioning holes are formed along the length direction of the positioning barrel, two ends of each positioning hole penetrate through two end faces of the positioning barrel, and two adjacent positioning holes are mutually parallel and/or are arranged at a set angle.
2. The aiming fixture of claim 1, wherein the locator pin includes two.
3. The aiming fixture as recited in claim 1, wherein a handle is further fixedly mounted to the positioning barrel.
4. The aiming device of claim 1, wherein one of the positioning holes is located at a center of the positioning barrel, and a shaft center of the positioning barrel passes through a center of the positioning hole.
5. The aiming fixture as recited in claim 4, wherein a dial is fixedly mounted at one end of the positioning cylinder for measuring the angle of rotation of the positioning cylinder.
6. A decompression device, comprising the aiming device as claimed in any one of claims 1 to 5 and a drill bit, wherein the drill bit is a hollow trephine, and the drill bit is sleeved outside the positioning pin and used for drilling a hole in a bone to form a tunnel.
7. The pressure relief device of claim 6, wherein the drill bit comprises a first diameter portion and a second diameter portion, the first diameter portion having an inner diameter smaller than an inner diameter of the second diameter portion, the first diameter portion being configured to pass the positioning pin therethrough and support the positioning pin, the positioning pin passing through the first diameter portion and the second diameter portion in sequence.
8. An osteosynthetic device comprising a pressure reduction device as claimed in claim 6, an implantation sleeve and a funnel, wherein said implantation sleeve is adapted to be inserted into said tunnel and wherein one end of said funnel is adapted to be inserted into said sleeve for transporting bone tissue.
9. The bone grafting device of claim 8, wherein a partition is provided in the sleeve, the partition divides the sleeve into a working area for insertion of the funnel and transport of bone tissue and a viewing area for insertion of an arthroscope.
10. A bone grafting device according to claim 8, wherein the spacer is a transparent spacer.
CN202110945601.XA 2021-08-13 2021-08-13 Aiming positioning device, pressure reducing device and bone grafting device Withdrawn CN113576594A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110945601.XA CN113576594A (en) 2021-08-13 2021-08-13 Aiming positioning device, pressure reducing device and bone grafting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110945601.XA CN113576594A (en) 2021-08-13 2021-08-13 Aiming positioning device, pressure reducing device and bone grafting device

Publications (1)

Publication Number Publication Date
CN113576594A true CN113576594A (en) 2021-11-02

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CN202110945601.XA Withdrawn CN113576594A (en) 2021-08-13 2021-08-13 Aiming positioning device, pressure reducing device and bone grafting device

Country Status (1)

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CN (1) CN113576594A (en)

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Application publication date: 20211102