CN211512010U - Built-in skull tractor - Google Patents
Built-in skull tractor Download PDFInfo
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- CN211512010U CN211512010U CN201922311439.7U CN201922311439U CN211512010U CN 211512010 U CN211512010 U CN 211512010U CN 201922311439 U CN201922311439 U CN 201922311439U CN 211512010 U CN211512010 U CN 211512010U
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Abstract
The utility model relates to a built-in skull tractor, including the screw rod, first skull fixed plate, second skull fixed plate, universal joint and regulating arm, the one end and the first skull fixed plate of screw rod rotate to be connected, second skull fixed plate and screw rod threaded connection, the other end of screw rod is rotated through universal joint and regulating arm's one end and is connected, one side of first skull fixed plate has first skull fixed hook, one side of second skull fixed plate has second skull fixed hook, first skull fixed hook and second skull fixed hook all are used for with the skull joint. The device is suitable for patients needing skull traction treatment such as craniosynostosis and the like, has small volume, reduces surgical trauma and scalp tension, and avoids the tractor from being exposed due to scalp abrasion; the tractor is provided with the hook, so that firm fixation is ensured, and the tractor is not easy to slip in the traction process; the titanium nail matched with the tractor has various models, is suitable for the skull with different thicknesses, and can ensure that the titanium nail obtains maximum firmness on the premise of not damaging dura mater.
Description
Technical Field
The utility model relates to the field of medical equipment, concretely relates to built-in skull tractor.
Background
The utility model is suitable for a cranium traction art especially is applied to cranium traction remolding of craniofacial deformation children.
The traditional treatment method is a craniofacial large-scale osteotomy bone grafting operation method, the method needs a craniofacial internal and external combined path, orbital osteotomy and reconstruction of a cranio-orbital-facial form, the wound is heavy, the risk is high, and the operation has to be delayed particularly for young children because the young children cannot bear the operation wound. Therefore, the treatment trend of the disease gradually tends to be minimally invasive, and the micro built-in traction technology brings little wound, has little influence on the appearance and life of patients and has a larger application prospect because of the following advantages: firstly, the resorption of the antedisplacement bone flap is reduced, the deterioration and deterioration of the dura mater are reduced, and the skull can move controllably; traction osteogenesis promotes the frontal orbital bone to move forward, and the dura mater is expanded, so that the recurrence rate is reduced; the scalp which can be extended and covered by the drawn bone can reduce the pressure of soft tissues on bone flaps and expand cranial cavities to the maximum extent; fourthly, new bone is continuously generated in the process of traction osteogenesis, and the requirement of bone grafting is eliminated. At present, no special built-in skull tractor exists at home and abroad, and most clinically applied tractors are also formed by improving other part tractors, so that the skull tractor has a plurality of defects: the size of the individual is large; the matching degree is not high; the fixation is not firm and the slippage is easy; the dura mater and the scalp are easily damaged in the traction process; the cost is high, and the like, which brings inconvenience to domestic treatment of the diseases. The Chinese population base is large, the number of craniofacial abnormal children is not negligible, in order to enable craniofacial abnormal children to receive operation treatment earlier, the craniofacial abnormal children are integrated into the society as soon as possible, the social burden is relieved, and in order to enable Chinese treatment of the craniofacial abnormal children to catch up to even lead the international level, the development of the built-in skull tractor suitable for the Chinese has important scientific and clinical significance.
The currently substituted cranial built-in distractors suffer from the following problems: firstly, the models are not matched, the general size is larger, the scalp is easy to wear, and the operation wound is large; secondly, the fixation is not firm and the slip is easy to occur; thirdly, the dura mater is easily damaged in the traction process, causing serious complications; fourthly, the adjusting rod is hard and cannot be bent, so that the life of a patient is seriously influenced; fifth, the price is expensive.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is how to realize the built-in traction of the skull.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a built-in skull tractor, includes screw rod, first skull fixed plate, second skull fixed plate, universal joint and regulating arm, the one end of screw rod with first skull fixed plate rotates to be connected, second skull fixed plate with screw rod threaded connection, the other end of screw rod passes through universal joint with the one end of regulating arm rotates to be connected, one side of first skull fixed plate has first skull fixed hook, one side of second skull fixed plate has second skull fixed hook, first skull fixed hook with second skull fixed hook all is used for with the skull joint.
The utility model has the advantages that: the built-in miniature skull tractor is specially applied to patients needing skull traction treatment such as craniosynostosis and the like, has high matching degree in design, is smaller than a conventional tractor, reduces surgical trauma and scalp tension, and avoids the tractor from being exposed due to scalp abrasion; in addition, the tractor is provided with the hook, so that the fixation can be ensured to be firm, and the tractor is not easy to slip in the traction process; the titanium nails matched with the tractor have various types, are suitable for the skull with different thicknesses, and can obtain the maximum firmness on the premise of ensuring that the titanium nails do not damage dura mater; the domestic miniature built-in skull tractor has low price and brings convenience to the treatment and economy of patients. The first skull fixing plate and the second skull fixing plate are respectively connected with the skull on two sides to be dragged through titanium nails, and the first skull fixing hook and the second skull fixing hook are respectively clamped on the edges of the skull on two sides of the skull opening. When the built-in skull tractor is used, the screw, the first skull fixing plate and the second skull fixing plate are all arranged under the skin, the adjusting arm extends out of the skin, a doctor rotates the adjusting arm on the outer side, and the adjusting arm drives the screw to rotate through the universal joint, so that the skull fixing plate moves along the screw. After traction, new bones grow out between the dragged skull bones to realize skull remodeling, and then the skull tractor is removed to finish treatment. The skull fixing hook is hung at the edge of the skull to be pulled, so that the stability of fixing the skull fixing plate and the skull is enhanced.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the first skull fixing plate comprises a first skull fixing plate body and a first connecting sleeve, the first connecting sleeve is rotatably sleeved at one end of the screw rod, one side of the first skull fixing plate body is fixedly connected with the side wall of the first connecting sleeve, and the other side of the first skull fixing plate body is provided with the first skull fixing hook.
The beneficial effect of adopting the further scheme is that: the first skull fixing plate body is fixed with a skull on one side to be pulled through the titanium nail, and the first skull fixing hook is hung on the edge of the skull. The first skull fixing hook and the first connecting sleeve are arranged on the different sides of the skull fixing plate body, and the skull fixing device is convenient to use.
Further, the one end of screw rod has first joint portion, first connecting sleeve has second joint portion, first joint portion with second joint portion joint and relative rotation, the one end of screw rod is passed through first joint portion with second joint portion with first connecting sleeve rotates and is connected.
The beneficial effect of adopting the further scheme is that: one end of the screw rod and the skull orbit fixing plate are simple and convenient to install and flexible to rotate.
Further, the first clamping portion is an annular clamping groove, the second clamping portion is an annular protrusion, or the first clamping portion is an annular protrusion, and the second clamping portion is an annular clamping groove; the annular bulge is clamped in the annular clamping groove.
The beneficial effect of adopting the further scheme is that: first joint portion and second joint portion simple structure, firm in connection.
Furthermore, the number of the first skull fixing hooks is two, and the two first skull fixing hooks are respectively arranged on the other side of the first skull fixing plate body and are respectively positioned on two sides of the screw.
The beneficial effect of adopting the further scheme is that: the two first skull fixing hooks can enhance the connection stability and do not influence the bending of the first skull fixing plate body for adapting to the skull.
Furthermore, one end of the first skull fixing plate body facing the screw rod is a first closed end, the first closed end is provided with the first skull fixing hook, and one end of the first skull fixing plate body facing away from the screw rod is a first open end.
The beneficial effect of adopting the further scheme is that: first skull fixed plate body is C shape, stable in structure, sets up the volume that the open end can reduce first skull fixed plate body, weight reduction, reduces patient's burden.
And the sleeve is sleeved outside the screw rod, and one end of the sleeve is fixedly connected with the first connecting sleeve.
The beneficial effect of adopting the further scheme is that: the brain tissue is avoided wearing away in the screw rod rotation process.
Furthermore, the second skull fixing plate comprises a second skull fixing plate body and a second connecting sleeve, an internal thread matched with the screw rod is arranged in the second connecting sleeve, the second connecting sleeve is in threaded connection with the screw rod, one side of the second skull fixing plate body is fixedly connected with the side wall of the second connecting sleeve, and the other side of the second skull fixing plate body is provided with the second skull fixing hook.
The beneficial effect of adopting the further scheme is that: the second skull fixing plate body is fixed with the skull on the other side to be pulled through the titanium nail, and the second skull fixing hook is hung on the edge of the skull. The second skull fixing hook and the second connecting sleeve are arranged on the opposite sides of the skull fixing plate body, and the skull fixing device is convenient to use.
Furthermore, the number of the second skull fixing hooks is two, and the two second skull fixing hooks are respectively arranged on the other side of the second skull fixing plate body and are respectively positioned on two sides of the screw.
The beneficial effect of adopting the further scheme is that: the two second skull fixing hooks can enhance the connection stability and do not influence the bending of the second skull fixing plate body for adapting to the skull.
Furthermore, one end of the second skull fixing plate body facing the first skull fixing plate is a second closed end, the second closed end is provided with the second skull fixing hook, and one end of the second skull fixing plate body facing the adjusting arm is a second open end.
The beneficial effect of adopting the further scheme is that: the second skull fixing plate body is C-shaped, has a stable structure, and can reduce the volume of the second skull fixing plate body, reduce the weight and reduce the burden of a patient by arranging the opening end.
Furthermore, the adjusting arm comprises an adjusting rod and a universal pipe, one end of the adjusting rod is fixedly connected with one end of the universal pipe, and the other end of the screw rod is rotatably connected with the other end of the adjusting rod through the universal joint.
The beneficial effect of adopting the further scheme is that: the adjusting rod enhances the connection strength of the connection part of the adjusting arm and the universal joint, the universal pipe enables the adjusting arm to be bent in any direction at any position, the flexibility of the adjusting rod is enhanced, and meanwhile, the universal pipe has certain strength and can keep the bent shape. The universal pipe can be bent and attached to the head, so that the burden of a patient in the traction process is relieved, and the influence on the life of the patient is reduced.
Further, the other end of the universal pipe is provided with an adjusting part, and the adjusting part drives the universal pipe to rotate.
The beneficial effect of adopting the further scheme is that: the adjusting part is rotated through a wrench or a screwdriver, the adjusting part drives the universal pipe to rotate, adjustment is facilitated, and a doctor can accurately obtain the moving distance of the skull fixing plate according to the number of rotating turns and the thread pitch of the screw.
Drawings
FIG. 1 is a schematic three-dimensional structure of an internal skull tractor according to the present invention;
FIG. 2 is an exploded view of the built-in skull retractor of the present invention;
FIG. 3 is a view showing the structure of the universal joint of the built-in skull tractor of the present invention;
fig. 4 is a sectional view of the connection structure of the screw and the first connecting sleeve of the built-in skull tractor of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the skull fixing device comprises a screw, 2, a first skull fixing plate, 201, a first skull fixing hook, 202, a first skull fixing plate body, 203, a first connecting sleeve, 3, a second skull fixing plate, 301, a second skull fixing hook, 302, a second skull fixing plate body, 303, a second connecting sleeve, 4, a universal joint, 5, an adjusting arm, 501, an adjusting rod, 502, a universal pipe, 5021, an adjusting part, 6 and a sleeve.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1-4, an internal skull tractor comprises a screw 1, a first skull fixing plate 2, a second skull fixing plate 3, a universal joint 4 and an adjusting arm 5, wherein one end of the screw 1 is rotatably connected with the first skull fixing plate 2, the second skull fixing plate 3 is in threaded connection with the screw 1, the other end of the screw 1 is rotatably connected with one end of the adjusting arm 5 through the universal joint 4, a first skull fixing hook 201 is arranged on one side of the first skull fixing plate 2, a second skull fixing hook 301 is arranged on one side of the second skull fixing plate 3, and the first skull fixing hook 201 and the second skull fixing hook 301 are both used for being clamped with a skull.
The first skull fixing plate 2 and the second skull fixing plate 3 are respectively provided with a plurality of uniformly arranged connecting holes, the first skull fixing plate 2 and the second skull fixing plate 3 are respectively connected with the skull on two sides through titanium nails, and the skull fixing hooks are clamped at the edge of the skull. When the built-in skull tractor is used, the screw rod 1, the first skull fixing plate 2 and the second skull fixing plate 3 are all placed under the skin, the adjusting arm 5 extends out of the skin, a doctor rotates the adjusting arm 5 on the outer side, the adjusting arm 5 drives the screw rod 1 to rotate through the universal joint 4, and then the second skull fixing plate 3 moves along the screw rod. After traction, new bones grow between the two dragged skulls to realize skull remodeling, and then the skull tractor is detached to finish treatment. The first skull fixing hook 201 and the second skull fixing hook 301 enhance the stability of the connection of the first skull fixing plate 2 and the second skull fixing plate 3 with the skull.
As a further scheme of the embodiment, the first skull fixing plate 2 includes a first skull fixing plate body 202 and a first connecting sleeve 203, the first connecting sleeve 203 is rotatably sleeved at one end of the screw rod 1, one side of the first skull fixing plate body 202 is fixedly connected with a side wall of the first connecting sleeve 203, and the other side of the first skull fixing plate body is provided with the first skull fixing hook 201.
Specifically, the first skull fixation plate body 202 is welded to the side wall of the first connection sleeve 203.
As a further scheme of this embodiment, the one end of screw rod 1 has first joint portion, first connecting sleeve 203 has second joint portion, first joint portion with second joint portion joint and relative rotation, the one end of screw rod 1 is passed through first joint portion with second joint portion with first connecting sleeve 203 rotates and is connected.
The first clamping portion is an annular clamping groove, the second clamping portion is an annular bulge, or the first clamping portion is an annular bulge, and the second clamping portion is an annular clamping groove; the annular bulge is clamped in the annular clamping groove.
Specifically, as shown in fig. 4, the side wall of the screw rod 1 has an annular clamping groove, the end of the first connection sleeve 203 has an annular protrusion, and the inner side of the end of the first connection sleeve 203 further has an accommodating cavity for accommodating the end of the screw rod 1. The end part of the screw rod 1 extends into the accommodating cavity, and the annular bulge is clamped in the annular clamping groove and can rotate relative to the annular clamping groove. Preferably, the end of the screw 1 is further provided with a guide slope to facilitate the insertion of the end of the screw 1 into the receiving cavity. Preferably, as shown in fig. 1 and 2, the side walls of the housing chamber also have through slots parallel to the axis of the first connecting sleeve 203, which facilitate the opening of the side walls of the housing chamber and the insertion of the screw 1.
As a further scheme of this embodiment, there are two first skull fixing hooks 201, and the two first skull fixing hooks 201 are respectively disposed on the other side of the first skull fixing plate body 202 and are respectively located on two sides of the screw rod 1.
Specifically, the first skull fixation hook 201 is in the shape of a blunt fishhook. The skull external plate can be hooked, and the dura mater is not damaged.
As a further scheme of this embodiment, an end of the first skull fixing plate body 202 facing the screw 1 is a first closed end, the first closed end has the first skull fixing hook 201, and an end of the first skull fixing plate body 202 facing away from the screw 1 is a first open end.
Specifically, as shown in fig. 1 and 2, the first skull fixing plate body 202 is C-shaped, and the two first skull fixing hooks 201 are respectively located at two sides of the first closed end.
As a further scheme of this embodiment, the screw rod further includes a sleeve 6, the sleeve 6 is sleeved outside the screw rod 1, and one end of the sleeve 6 is fixedly connected to the first connecting sleeve 203.
As a further scheme of this embodiment, the second skull fixing plate 3 includes a second skull fixing plate body 302 and a second connecting sleeve 303, the second connecting sleeve 303 has an internal thread adapted to the screw 1 therein, the second connecting sleeve 303 is in threaded connection with the screw 1, one side of the second skull fixing plate body 302 is fixedly connected with a side wall of the second connecting sleeve 303, and the other side of the second skull fixing plate body is provided with the second skull fixing hook 301.
Specifically, one side of the second skull fixing plate body 302 is welded with the side wall of the second connecting sleeve 303. The inner wall of the second connecting sleeve 303 is provided with an internal thread matched with the screw rod 1.
In particular, the inner diameter of the sleeve 6 is larger than the outer diameter of the second connection sleeve 303.
As a further scheme of this embodiment, there are two second skull fixing hooks 301, and the two second skull fixing hooks 301 are respectively disposed at two ends of the other side of the second skull fixing plate body 302.
Specifically, the second skull fixation hook 301 has a blunt fishhook shape. The skull external plate can be hooked, and the dura mater is not damaged.
As a further scheme of this embodiment, an end of the second skull fixing plate body 302 facing the first skull fixing plate 2 is a second closed end, the second closed end has the second skull fixing hook 301, and an end of the second skull fixing plate body 302 facing the adjusting arm 5 is a second open end.
Specifically, as shown in fig. 1 and 2, the second skull fixing plate body 302 is C-shaped, and the two second skull fixing hooks 301 are respectively located at two sides of the second closed end.
As a further scheme of this embodiment, the adjusting arm 5 includes an adjusting rod 501 and a universal tube 502, one end of the adjusting rod 501 is fixedly connected with one end of the universal tube 502, and the other end of the screw rod 1 is rotatably connected with the other end of the adjusting rod 501 through the universal joint 4.
Specifically, one end of the adjusting rod 501 is welded to one end of the universal tube 502. As shown in fig. 3, the universal joint 4 is a cross-shaped rotating shaft, one end of the adjusting lever 501 is provided with two protruding first rotating portions, and the two first rotating portions are respectively rotatably connected with two opposite rotating shafts of the universal joint 4. One end of the universal tube 502 has two protruding second rotating parts, and the two second rotating parts are respectively connected with the other two opposite rotating shafts of the universal joint 4 in a rotating manner.
As a further scheme of this embodiment, the other end of the universal pipe 502 has an adjusting part 5021, and the adjusting part 5021 drives the universal pipe 502 to rotate.
Specifically, as shown in fig. 1 and 2, the adjusting portion 5021 is a raised hexagonal block, a user can pull the adjusting portion 5021 through a hexagonal wrench to drive the universal tube 502 to rotate, the universal tube 502 drives the screw rod 1 to rotate through the universal joint 4, and the skull fixing plate 3 moves along the screw rod 1. The adjusting part 5021 may also be a straight or cross-shaped groove, and a user may rotate the adjusting part 5021 by a screwdriver.
Preferably, the first skull fixing plate body 202 and the second skull fixing plate body 302 are arranged on the same side of the screw rod 1.
Preferably, the screw 1, the first skull fixing plate 2, the second skull fixing plate 3, the universal joint 4 and the adjusting arm 5 are all made of medical titanium alloy materials. The first skull fixing plate 2 and the second skull fixing plate 3 can be properly bent according to the radian of the skull or the orbit, so that the first skull fixing plate 2 and the second skull fixing plate 3 are more fit with the human body.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. indicate the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a built-in skull tractor which characterized in that, includes screw rod (1), first skull fixed plate (2), second skull fixed plate (3), universal joint (4) and regulating arm (5), the one end of screw rod (1) with first skull fixed plate (2) rotate to be connected, second skull fixed plate (3) with screw rod (1) threaded connection, the other end of screw rod (1) passes through universal joint (4) with the one end of regulating arm (5) is rotated and is connected, one side of first skull fixed plate (2) has first skull fixed hook (201), one side of second skull fixed plate (3) has second skull fixed hook (301), first skull fixed hook (201) with second skull fixed hook (301) all are used for with the skull joint.
2. The built-in skull retractor according to claim 1, wherein the first skull fixing plate (2) comprises a first skull fixing plate body (202) and a first connecting sleeve (203), the first connecting sleeve (203) is rotatably sleeved on one end of the screw rod (1), one side of the first skull fixing plate body (202) is fixedly connected with the side wall of the first connecting sleeve (203), and the other side of the first skull fixing plate body is provided with the first skull fixing hook (201).
3. The built-in skull retractor according to claim 2, wherein one end of the screw rod (1) has a first clamping portion, the first connecting sleeve (203) has a second clamping portion, the first clamping portion and the second clamping portion are clamped and relatively rotated, and one end of the screw rod (1) is rotatably connected with the first connecting sleeve (203) through the first clamping portion and the second clamping portion.
4. The built-in skull retractor according to claim 2, wherein the number of the first skull fixing hooks (201) is two, and the two first skull fixing hooks (201) are respectively arranged on the other side of the first skull fixing plate body (202) and are respectively arranged on two sides of the screw (1).
5. The built-in skull retractor according to claim 2, wherein the end of the first skull fixing plate body (202) facing the screw (1) is a first closed end having the first skull fixing hook (201), and the end of the first skull fixing plate body (202) facing away from the screw (1) is a first open end.
6. The built-in skull retractor according to claim 2, further comprising a sleeve (6), wherein the sleeve (6) is sleeved outside the screw rod (1), and one end of the sleeve (6) is fixedly connected with the first connecting sleeve (203).
7. The built-in skull retractor according to claim 1, wherein the second skull fixing plate (3) comprises a second skull fixing plate body (302) and a second connecting sleeve (303), the second connecting sleeve (303) has internal threads matched with the screw rod (1), the second connecting sleeve (303) is in threaded connection with the screw rod (1), one side of the second skull fixing plate body (302) is fixedly connected with the side wall of the second connecting sleeve (303), and the other side of the second skull fixing plate body is provided with the second skull fixing hook (301).
8. The built-in skull retractor according to claim 7, wherein the number of the second skull fixing hooks (301) is two, and the two second skull fixing hooks (301) are respectively arranged at the other side of the second skull fixing plate body (302) and are respectively positioned at two sides of the screw rod (1).
9. The built-in skull retractor according to claim 7, wherein the end of the second skull fixation plate body (302) facing the first skull fixation plate (2) is a second closed end having the second skull fixation hook (301), and the end of the second skull fixation plate body (302) facing the adjusting arm (5) is a second open end.
10. The built-in skull retractor according to any of the claims 1-8, wherein the adjusting arm (5) comprises an adjusting rod (501) and a universal tube (502), one end of the adjusting rod (501) is fixedly connected with one end of the universal tube (502), and the other end of the screw (1) is rotatably connected with the other end of the adjusting rod (501) through the universal joint (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922311439.7U CN211512010U (en) | 2019-12-20 | 2019-12-20 | Built-in skull tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922311439.7U CN211512010U (en) | 2019-12-20 | 2019-12-20 | Built-in skull tractor |
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| Publication Number | Publication Date |
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| CN211512010U true CN211512010U (en) | 2020-09-18 |
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| CN201922311439.7U Active CN211512010U (en) | 2019-12-20 | 2019-12-20 | Built-in skull tractor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112890891A (en) * | 2021-01-28 | 2021-06-04 | 浙江大学 | Inflation-free internal support device for axillary approach thyroid operation |
| CN114098931A (en) * | 2021-11-26 | 2022-03-01 | 中国人民解放军空军军医大学 | Individualized built-in LeFortIII type osteotomy distractor |
-
2019
- 2019-12-20 CN CN201922311439.7U patent/CN211512010U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112890891A (en) * | 2021-01-28 | 2021-06-04 | 浙江大学 | Inflation-free internal support device for axillary approach thyroid operation |
| CN114098931A (en) * | 2021-11-26 | 2022-03-01 | 中国人民解放军空军军医大学 | Individualized built-in LeFortIII type osteotomy distractor |
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