CN111631778A - Bone surface cortical bone breaking device in vertebral bone surgery - Google Patents
Bone surface cortical bone breaking device in vertebral bone surgery Download PDFInfo
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- CN111631778A CN111631778A CN202010300320.4A CN202010300320A CN111631778A CN 111631778 A CN111631778 A CN 111631778A CN 202010300320 A CN202010300320 A CN 202010300320A CN 111631778 A CN111631778 A CN 111631778A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 95
- 230000001054 cortical effect Effects 0.000 title claims abstract description 27
- 238000001356 surgical procedure Methods 0.000 title claims description 14
- 239000002184 metal Substances 0.000 claims abstract description 20
- 230000010354 integration Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 230000002980 postoperative effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 206010049816 Muscle tightness Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000000642 iatrogenic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
- A61B17/1604—Chisels; Rongeurs; Punches; Stamps
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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
- A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1671—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the spine
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a bone surface cortical bone breaking device in a vertebra operation, which comprises a motor, a driving shaft and a puncturing head, wherein the motor rotates to drive the driving shaft to rotate, the puncturing head comprises a main shaft, a rotating wheel is arranged at the side part of the main shaft, a metal sharp spine is arranged on the rotating wheel, a group of bevel gear sets which are mutually meshed are fixed at the tail ends of the main shaft and the driving shaft, at least one end of the main shaft is erected on a main shaft bearing in a shell, the front end of the shell is provided with an exposure opening of the metal sharp spine, and the metal sharp spine protrudes outwards from the exposure opening. This breaking device sets up the motor in the afterbody, and through drive shaft drive main shaft, it rotates to drive the runner by the main shaft, when the user presses the exposure of breaking device to vertebra skeleton surface, quick pivoted runner drives the metal spine and strikes at the skeleton surface, and break open the cortex bone on skeleton surface and expose cancellous bone, the great area bone bed that the cancellous bone was exposed to the formation that can be quick breaks the cortex bone, conveniently put into the bone grain and plant the bone integration, strengthen the combination of bone and flesh.
Description
Technical Field
The invention relates to a bone surface cortical bone breaking device in vertebral bone surgery.
Background
In spinal surgery, the destruction of cortical bone from the surface of the bone is often involved. In order to increase the stability of operation section postoperative, the bone grafting that section autologous bone or xenogeneic bone need operate in the art fuses, and complete outer cortex bone structure can hinder the bone fusion, in order to solve this problem, traditional way adopts the chisel to strike one by one at glossy bone surface and form the damaged surface, make the damaged cancellous bone of exposing of cortex bone, and then the construction is used for the bone bed of bone grafting, be convenient for autologous bone or xenogeneic bone and the integration of operation section bony structure, increase postoperative stability. However, the chiseling method is time-consuming, requires more experience for operators, is easy to prolong the whole operation time, and can cause iatrogenic fractures due to the fact that the chiseling operation is a longitudinal explosive force, and also has the possibility of damaging the spinal cord and blood vessels in the operation.
Alternatively, the actual operation is to use a grinding drill to grind the cortical bone on the surface of the bone. The abrasion drill rotates on the surface of the bone quickly to form friction, and although the cortical bone can be broken away quickly, high-speed friction generates high temperature, so that tissue cells are easy to necrose, and the construction of a bone bed is damaged.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a bone surface cortical bone breaking device in a vertebral bone surgery, which can more efficiently break cortical bone on the surface of a bone to complete bone bed construction on the premise of not damaging an organism.
Therefore, the bone surface cortical bone breaking device in the spine bone surgery provided by the invention comprises a motor, a driving shaft and a puncture head, wherein the motor drives the driving shaft to rotate by rotating, the puncture head comprises a main shaft, a rotating wheel is arranged on the side part of the main shaft, a metal sharp thorn is arranged on the rotating wheel, a group of bevel gear sets which are mutually meshed are fixed at the tail ends of the main shaft and the driving shaft, at least one end of the main shaft is erected on a main shaft bearing in a shell, an exposure opening of the metal sharp thorn is arranged at the front end of the shell, and the metal sharp thorn protrudes outwards from the exposure opening.
Furthermore, rotating wheels are arranged on two sides of the main shaft, a group of bevel gear sets which are meshed with each other are fixed in the middle of the main shaft and at the tail end of the driving shaft, and the end of the main shaft is erected on a main shaft bearing in the shell.
Further, the breaking device comprises a head shell, a handle shell and a tail shell, the motor is arranged in the tail shell, the driving shaft is arranged in the handle shell, the puncture head is arranged in the head shell, and the exposure port is arranged at the upper end of the head shell.
Further, the helical gear set comprises a straight gear arranged in the middle of the main shaft and a helical gear arranged at the tail end of the driving shaft, and the helical gear is meshed with the straight gear.
Further, the motor is arranged in the motor shell, the lower portion of the inner wall of the tail shell is provided with an internal thread, the lower portion of the tail shell is in threaded connection with a spiral ejecting piece, the circular connecting end at the upper end of the spiral ejecting piece enters a circular connecting groove at the bottom of the motor shell to form a rotating connection, an output shaft at the upper end of the motor drives a driving shaft, a driving shaft shell is fixed at the upper end of the motor shell, a rotating frame arranged in the head shell is fixed at the upper end of the driving shaft shell, a spindle bearing is fixed on the rotating frame, the rotating frame and the spindle bearing are arranged in a vertical guiding groove of the head shell, the driving shaft shell is fixed on a movable block, the spiral ejecting piece moves up and down along the internal thread trend of the tail shell when rotating, the motor shell, the driving shaft shell and the rotating frame are driven, The main shaft and the piercing head move up and down.
Furthermore, the metal spikes on the rotating wheel are conical and face the rotating direction of the rotating wheel.
Furthermore, a rotating wheel is arranged on one side of the main shaft, a group of bevel gear sets which are meshed with each other are fixed at one end of the main shaft and the tail end of the driving shaft, the other end of the main shaft is erected on a main shaft bearing in the shell, and the surface of the rotating wheel is distributed in an arc shape.
Furthermore, the breaking device comprises a head shell, a handle shell and a tail shell, the motor is arranged in the tail shell, the driving shaft is arranged in the handle shell, the puncture head is arranged in the head shell, and the exposure port is arranged at the upper end of the head shell; the helical gear set comprises a straight gear arranged in the middle of the main shaft and a helical gear arranged at the tail end of the driving shaft, and the helical gear is meshed with the straight gear.
Further, the motor is arranged in the motor shell, the lower portion of the inner wall of the tail shell is provided with an internal thread, the lower portion of the tail shell is in threaded connection with a spiral ejecting piece, the circular connecting end at the upper end of the spiral ejecting piece enters a circular connecting groove at the bottom of the motor shell to form a rotating connection, an output shaft at the upper end of the motor drives a driving shaft, a driving shaft shell is fixed at the upper end of the motor shell, a rotating frame arranged in the head shell is fixed at the upper end of the driving shaft shell, a spindle bearing is fixed on the rotating frame, the rotating frame and the spindle bearing are arranged in a vertical guiding groove of the head shell, the driving shaft shell is fixed on a movable block, the spiral ejecting piece moves up and down along the internal thread trend of the tail shell when rotating, the motor shell, the driving shaft shell and the rotating frame are driven, The main shaft and the piercing head move up and down.
The invention has the technical effects that:
1. this breaking device sets up the motor in the afterbody, and the drive shaft through the stock adopts bevel gear group complex mode drive main shaft, it rotates to drive the runner by the main shaft, when the user is pressed the exposure of breaking device to vertebra skeleton surface, quick pivoted runner drives the metal spine and strikes at skeleton surface, and break open the cortex bone on skeleton surface and expose cancellous bone, and make the local perk of cortex bone, can break the cortex bone fast, thereby expose cancellous bone, found great area bone bed, conveniently put into autologous bone or allogeneic bone and plant the bone and fuse, strengthen the bony fusion between the fixed section centrum of postoperative.
2. The invention has more reasonable structure, wherein the driving shaft driven by the motor drives the puncture head to rotate through the reversing of the bevel gear set, so that no redundant mechanism exists in the transverse position of the whole device. In order to reduce the damage to the human body as much as possible in the operation, a small incision is selected as much as possible, the muscle tension of a patient exists, the operation visual field of the general operation incision is narrow, the structure of the invention just enables a puncture head to enter the surface of a bone from a narrow space, and a driving shaft and a motor at the rear part are of a structure which are distributed along the length direction in sequence, so that the tissues at two sides of the operation incision are not touched, and the smooth construction of a bone bed can be ensured.
3. The invention adopts a structure that the rotating wheel is arranged on one side of the main shaft, and the surfaces of the rotating wheels are distributed in an arc shape, so that the structure is beneficial to reducing the friction surface, especially the transverse narrowing, and the friction part can enter the irregular vertebral bone surface area.
Drawings
Fig. 1 is a schematic perspective view of a bone surface breaking device according to embodiment 1 of the present invention.
Fig. 2 is a perspective view of the bone surface removal device of fig. 1.
Fig. 3 is a perspective view of the drive shaft and piercing head of the interior of fig. 2.
Fig. 4 is a schematic cross-sectional structural view of a bone surface breaking device according to embodiment 2 of the present invention.
Fig. 5 is a schematic perspective view of a bone surface breaking device according to embodiment 3 of the present invention.
Fig. 6 is a schematic cross-sectional structural view of a bone surface breaking device according to embodiment 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1-3, a bone surface cortical bone removing device in a vertebral surgery provided in embodiment 1 of the present invention includes a motor 1, a driving shaft 2, and a puncturing head, where the motor 1 rotates to drive the driving shaft 2 to rotate, the puncturing head includes a main shaft 3, two side portions of the main shaft 3 are provided with rotating wheels 4, the rotating wheels 4 are provided with metal spikes 5, and in order to enhance a puncturing effect, the metal spikes 5 on the rotating wheels 4 are conical and face a rotation direction of the rotating wheels 4. A group of helical gear sets which are mutually meshed are fixed in the middle of the main shaft 3 and at the tail end of the driving shaft 2, each helical gear set comprises a straight gear 6 arranged in the middle of the main shaft 3 and a helical gear 7 arranged at the tail end of the driving shaft 2, the helical gears 7 are meshed with the straight gears 6, two ends of the main shaft 3 are erected on a main shaft bearing 8 in a shell, an exposure opening 9 of the metal sharp spine 5 is formed in the front end of the shell, and the metal sharp spine 5 protrudes outwards from the exposure opening 9. In this embodiment, the breaking device includes a head housing 10, a handle housing 11, and a tail housing 12, the motor 1 is disposed in the tail housing 12, the driving shaft 2 is disposed in the handle housing 11, the piercing head is disposed in the head housing 10, and the exposure opening 9 is located at the upper end of the head housing 10.
Referring to fig. 1 to 4, embodiment 2 of the present invention is substantially the same as embodiment 1 except that in embodiment 2, a mechanism capable of moving up and down the puncture head as a whole is provided: the motor 1 is arranged in a motor shell 13, the lower part of the inner wall of the tail shell 12 is provided with internal threads, the lower part of the tail shell 12 is in threaded connection with a spiral ejector 14, the upper end of the spiral ejector 14 is provided with a circular connecting end 15, the circular connecting end 15 enters a circular connecting groove 16 at the bottom of the motor shell 13 to form rotary connection, an output shaft at the upper end of the motor 1 drives a driving shaft 2 to rotate, the upper end of the motor 1 shell is fixed with a driving shaft shell 17, the upper end of the driving shaft shell 17 is fixed with a rotating frame 18 arranged in a head shell 10, a spindle bearing 8 is fixed on the rotating frame 18, the rotating frame 18 and the spindle bearing 8 are arranged in a vertical direction 19 of the head shell 10, the driving shaft shell 17 is fixed on a movable block 20, the movable block 20 moves up and down along a sliding groove 21 on the driving shaft shell 17, meanwhile, the motor shell 13, the driving shaft shell 17 and the rotating frame 18 are driven to move up and down, and the motor 1, the driving shaft 2, the spindle 3 and the puncturing head are driven to move up and down. In this embodiment, the puncturing head can move up and down along with the rotation of the screw pushing member 14, when the operation position is at a position where the cortical bone is thin or when the operation person is a person who has a thin cortical bone such as children, the screw pushing member 14 can be rotated to move down, so that the exposed length of the metal spike 5 is shortened to adapt to the bone with the thin cortical bone, and when the operation position is at a position where the cortical bone is thick or when the operation person is a person who has professors of the cortical bone such as male strong years, the screw pushing member 14 can be rotated to move up, so that the exposed length of the metal spike 5 is increased to adapt to the bone with the thick cortical bone.
Referring to fig. 5-6, embodiment 3 of the present invention is substantially the same as embodiment 2, and differs only in the structural arrangement of the main shaft and the runner, and embodiment 3 adopts a structure in which the runner 4 is arranged on one side of the main shaft 3, specifically as follows: the utility model discloses a main shaft, including main shaft 3, main shaft 2, main shaft 3 one side is provided with runner 4, 3 one end of main shaft with the terminal a set of bevel gear set of intermeshing that is fixed with of drive shaft, the other end of main shaft 3 erects on the main shaft bearing 8 in the casing, the surface of runner is the arc and distributes. In embodiment 3, the main shaft is provided with one rotating wheel on one side, and the surfaces of the rotating wheels 4 are distributed in an arc shape, so that the structure is beneficial to reducing the friction surface, particularly the transverse narrowing, and the friction part can enter the irregular vertebral bone surface area.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A bone surface cortical bone breaking device in spinal surgery is characterized in that: the puncture head comprises a main shaft, a rotating wheel is arranged on the side portion of the main shaft, a metal sharp thorn is arranged on the rotating wheel, a group of bevel gear sets which are meshed with each other are fixed at the tail ends of the main shaft and the driving shaft, at least one end of the main shaft is erected on a main shaft bearing in a shell, an exposure opening of the metal sharp thorn is formed in the front end of the shell, and the metal sharp thorn protrudes outwards from the exposure opening.
2. The device for removing cortical bone from the surface of a bone in a spinal-skeletal surgery as recited in claim 1, wherein: the main shaft is characterized in that rotating wheels are arranged on two sides of the main shaft, a group of bevel gear sets which are meshed with each other are fixed in the middle of the main shaft and at the tail end of the driving shaft, and the end of the main shaft is erected on a main shaft bearing in the shell.
3. A bone surface cortical bone removal device in a vertebral skeletal surgery, as defined in claim 2, wherein: the breaking device comprises a head shell, a handle shell and a tail shell, the motor is arranged in the tail shell, the driving shaft is arranged in the handle shell, the puncture head is arranged in the head shell, and the exposure port is arranged at the upper end of the head shell.
4. A bone surface cortical bone removal device in vertebroplasty as claimed in claim 1, 2 or 3, characterized in that: the helical gear set comprises a straight gear arranged in the middle of the main shaft and a helical gear arranged at the tail end of the driving shaft, and the helical gear is meshed with the straight gear.
5. The device for removing cortical bone from the surface of bone in vertebral skeletal surgery as recited in claim 4, wherein: the motor is arranged in the motor shell, the lower part of the inner wall of the tail shell is provided with internal threads, the lower part of the tail shell is in threaded connection with a spiral pushing piece, the upper end of the spiral pushing piece is provided with a circular connecting end, the circular connecting end enters a circular connecting groove at the bottom of the motor shell to form rotary connection, an output shaft at the upper end of the motor drives the driving shaft to rotate, a driving shaft shell is fixed at the upper end of the motor shell, a rotating frame positioned in the head shell is fixed at the upper end of the driving shaft shell, the main shaft bearing is fixed on the rotating frame, the rotating frame and the main shaft bearing are positioned in the vertical guide groove of the head shell, the driving shaft shell is fixed on the movable block, the spiral ejecting piece moves up and down along the trend of the internal thread of the tail shell when rotating, and meanwhile, the motor shell, the driving shaft shell and the rotating frame are driven to move up and down, and the motor, the driving shaft, the main shaft and the piercing head are driven to move up and down.
6. A bone surface cortical bone removal device in vertebroplasty as claimed in claim 1, 2 or 3, characterized in that: the metal spikes on the rotating wheel are conical and face the rotating direction of the rotating wheel.
7. The device for removing cortical bone from the surface of bone in vertebral skeletal surgery as recited in claim 5, wherein: the metal spikes on the rotating wheel are conical and face the rotating direction of the rotating wheel.
8. The device for removing cortical bone from the surface of a bone in a spinal-skeletal surgery as recited in claim 1, wherein: the main shaft is characterized in that a rotating wheel is arranged on one side of the main shaft, a group of bevel gear sets which are meshed with each other are fixed at one end of the main shaft and the tail end of the driving shaft, the other end of the main shaft is erected on a main shaft bearing in the shell, and the surface of the rotating wheel is distributed in an arc shape.
9. The device for removing cortical bone from the surface of bone in skeletal surgery of claim 8, wherein: the breaking device comprises a head shell, a handle shell and a tail shell, the motor is arranged in the tail shell, the driving shaft is arranged in the handle shell, the puncture head is arranged in the head shell, and the exposure port is positioned at the upper end of the head shell; the helical gear set comprises a straight gear arranged in the middle of the main shaft and a helical gear arranged at the tail end of the driving shaft, and the helical gear is meshed with the straight gear.
10. A bone surface cortical bone removal device in vertebroplasty as claimed in claim 1, 8 or 9, characterized in that: the motor is arranged in the motor shell, the lower part of the inner wall of the tail shell is provided with internal threads, the lower part of the tail shell is in threaded connection with a spiral pushing piece, the upper end of the spiral pushing piece is provided with a circular connecting end, the circular connecting end enters a circular connecting groove at the bottom of the motor shell to form rotary connection, an output shaft at the upper end of the motor drives the driving shaft to rotate, a driving shaft shell is fixed at the upper end of the motor shell, a rotating frame positioned in the head shell is fixed at the upper end of the driving shaft shell, the main shaft bearing is fixed on the rotating frame, the rotating frame and the main shaft bearing are positioned in the vertical guide groove of the head shell, the driving shaft shell is fixed on the movable block, the spiral ejecting piece moves up and down along the trend of the internal thread of the tail shell when rotating, and meanwhile, the motor shell, the driving shaft shell and the rotating frame are driven to move up and down, and the motor, the driving shaft, the main shaft and the piercing head are driven to move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010300320.4A CN111631778A (en) | 2020-04-16 | 2020-04-16 | Bone surface cortical bone breaking device in vertebral bone surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010300320.4A CN111631778A (en) | 2020-04-16 | 2020-04-16 | Bone surface cortical bone breaking device in vertebral bone surgery |
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| CN111631778A true CN111631778A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010300320.4A Pending CN111631778A (en) | 2020-04-16 | 2020-04-16 | Bone surface cortical bone breaking device in vertebral bone surgery |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2824844Y (en) * | 2005-06-23 | 2006-10-11 | 王国平 | Skill roller |
| CN205548596U (en) * | 2016-02-03 | 2016-09-07 | 漳州蒙发利实业有限公司 | Easy -to -use type skin remover |
| CN108210013A (en) * | 2018-03-07 | 2018-06-29 | 徐州医科大学附属医院 | Cortex bone abrasive drilling |
| US20180256175A1 (en) * | 2014-05-05 | 2018-09-13 | Daniel R. Jacobson | Bone cleaning tool |
| CN109512482A (en) * | 2017-09-20 | 2019-03-26 | 王力平 | A kind of spacing collar trepan |
| CN110477963A (en) * | 2019-08-09 | 2019-11-22 | 上海长征医院 | Aspiration biopsy trepan |
| CN209826810U (en) * | 2019-02-22 | 2019-12-24 | 王春钊 | Clear device of scraping of dermatology |
-
2020
- 2020-04-16 CN CN202010300320.4A patent/CN111631778A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2824844Y (en) * | 2005-06-23 | 2006-10-11 | 王国平 | Skill roller |
| US20180256175A1 (en) * | 2014-05-05 | 2018-09-13 | Daniel R. Jacobson | Bone cleaning tool |
| CN205548596U (en) * | 2016-02-03 | 2016-09-07 | 漳州蒙发利实业有限公司 | Easy -to -use type skin remover |
| CN109512482A (en) * | 2017-09-20 | 2019-03-26 | 王力平 | A kind of spacing collar trepan |
| CN108210013A (en) * | 2018-03-07 | 2018-06-29 | 徐州医科大学附属医院 | Cortex bone abrasive drilling |
| CN209826810U (en) * | 2019-02-22 | 2019-12-24 | 王春钊 | Clear device of scraping of dermatology |
| CN110477963A (en) * | 2019-08-09 | 2019-11-22 | 上海长征医院 | Aspiration biopsy trepan |
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Application publication date: 20200908 |
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