CN109567883B - Jaw tractor with self-locking function - Google Patents
Jaw tractor with self-locking function Download PDFInfo
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- CN109567883B CN109567883B CN201810517825.9A CN201810517825A CN109567883B CN 109567883 B CN109567883 B CN 109567883B CN 201810517825 A CN201810517825 A CN 201810517825A CN 109567883 B CN109567883 B CN 109567883B
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- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000011164 ossification Effects 0.000 abstract description 6
- 210000001847 jaw Anatomy 0.000 description 27
- 210000000988 bone and bone Anatomy 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 210000003128 head Anatomy 0.000 description 3
- 210000000214 mouth Anatomy 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000002316 cosmetic surgery Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000004400 mucous membrane Anatomy 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 208000006670 Multiple fractures Diseases 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 210000004373 mandible Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Prosthetics (AREA)
- Soil Working Implements (AREA)
Abstract
The invention relates to a jaw tractor with a self-locking function, which is characterized in that: comprises a traction frame provided with a guide groove; the first plug is provided with an accommodating cavity and is fixed at the rear end in the guide groove; the fixed traction plate is fixed on the traction frame and provided with a first mounting hole; the second plug is fixed at the front end in the guide groove; a movable traction seat provided with a threaded through hole is restrained in the guide groove; a movable traction plate provided with a second mounting hole and fixed on the movable traction seat; the screw rod is provided with a first annular blocking shoulder, is arranged in the guide groove and can rotate around the guide groove, the rear end of the screw rod is movably inserted into the accommodating cavity, and the screw rod passes through and is in threaded connection with the threaded through hole; the self-locking spring is arranged in the accommodating cavity and acts on the rear end face of the screw rod, so that the screw rod keeps moving forward, and the first annular retaining shoulder compresses the trend of the inner end face of the second plug. The screw rod is not easy to rotate in the traction and osteogenesis process.
Description
Technical Field
The invention belongs to the technical field of medical instruments for oral cavity, jaw surgery and plastic surgery, and particularly relates to a jaw tractor with a self-locking function.
Background
At present, a special tractor aiming at the jawbone is widely applied to oral and maxillofacial or craniofacial surgery and plastic surgery, and the technical principle of the tractor can be summarized as follows: firstly cutting soft tissues around the jawbone, after cutting off the jawbone completely or not completely, gradually expanding the broken ends of the jawbone by using external force to form a gap, and continuously forming new bone to fill the gap by using traction force to induce the osteogenesis of the jawbone so as to achieve the aim of prolonging the jawbone. The technology can repair bone defects or defect deformities caused by various congenital or acquired reasons by utilizing the regeneration potential of organism tissues.
Such as a jaw traction and drawing device, a jaw traction device and a jaw traction device, wherein the jaw traction device is disclosed in Chinese patent number ZL95200175.6 (bulletin number CN 2205709Y), the jaw traction device is disclosed in Chinese patent number ZL98225259.5 (bulletin number CN 2341572Y), and the jaw traction device is disclosed in Chinese patent number ZL99234512.X (bulletin number CN 2378010Y), and the jaw traction device with the same working principle is disclosed in the Chinese patent number oral cavity built-in mandible traction extender. The screw rods are adopted as traction transmission parts, and the screw rods are driven to rotate by rotating the adjusting handles during operation, so that the movable traction plates are driven to move.
The existing jaw tractor has the following defects that the adjusting handle is exposed, and after the traction is finished, the expanded jaw can have certain restoring force, if the outside is carelessly touched with the driving handle or vibration is affected, the screw rod is caused to deflect towards the loosening direction, the jaw is generally pulled by adopting two tractors together, if the traction position of one of the tractors is changed, the jaw traction is uneven, the gap between broken bones is deviated, and finally the generated new bone forms saw teeth, so that the operation quality is seriously affected.
Therefore, how to ensure that the screw is not easy to rotate in the use process of the tractor is one of the technical problems to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to solve the technical problem of providing the jaw tractor with the self-locking function, which is difficult to cause autorotation of a screw rod in the traction osteogenesis process aiming at the current state of the art, and has the advantages of simple structure, convenient fixation and adjustment and accurate adjustment.
The technical scheme adopted for solving the technical problems is as follows: a jaw tractor with self-locking function, which is characterized in that: comprises a traction frame, wherein a guide groove is arranged on the traction frame along the length direction; the first plug is fixed at the rear end in the guide groove, and an accommodating cavity with an opening facing the guide groove is arranged in the first plug; the fixed traction plate is fixed on the traction frame or the first plugging head, and a plurality of first mounting holes for the self-tapping screws to penetrate are formed in the fixed traction plate; the second plug is fixed at the front end in the guide groove; the movable traction seat is restrained in the guide groove and can axially slide, and a threaded through hole which axially penetrates is formed in the movable traction seat; the movable traction plate is fixed on the movable traction seat and is provided with a plurality of second mounting holes for the self-tapping screws to pass through; the screw rod is arranged in the guide groove and can rotate around the axis of the screw rod, the rear end of the screw rod is movably inserted into the accommodating cavity, the front part of the screw rod is provided with a first annular blocking shoulder which is blocked and matched with the second plug, the front end of the screw rod penetrates out of the second plug to form a driving end connected with the adjusting handle, and meanwhile, the screw rod penetrates through and is in threaded connection with a threaded through hole on the movable traction seat; the self-locking spring is arranged in the accommodating cavity and acts on the rear end face of the screw rod, so that the screw rod keeps moving forward, and the first annular retaining shoulder compresses the trend of the inner end face of the second plug.
Preferably, the guide groove is composed of a circular groove part positioned at the lower part and a bar-shaped groove part positioned at the upper part, the bar-shaped groove part is communicated with the circular groove part, and the radial maximum width of the circular groove part is larger than the width of the bar-shaped groove part; the lower part of the movable traction seat is provided with a cylindrical part with the shape matched with the circular groove part, the threaded through hole is arranged on the cylindrical part, the middle part of the movable traction seat is provided with a guide part with the shape matched with the strip-shaped groove part, and the lower end surface of the movable traction seat is placed on the upper end surface of the traction frame. Because the radial maximum width of the circular groove part is larger than the width of the strip-shaped groove part, the cylindrical part at the lower part of the movable traction seat can be restrained in the circular groove part and only can slide forwards and backwards, and thus the traction distance can be adjusted more accurately.
In order to facilitate the accurate fixing of the movable traction plate on the movable traction seat, the middle part of the upper end surface of the movable traction seat is provided with a fixing column protruding upwards, and the movable traction plate is provided with a fixing hole for the fixing column to be inserted and matched; the front side and the rear side of the upper end face of the movable traction seat are provided with inserting blocks protruding upwards, and the front side and the rear side of the movable traction plate are provided with inserting grooves for the inserting blocks to be inserted. Through the fixed column and the fixed hole, and the positioning fit of the insert block and the slot, the connection unit of the movable traction seat and the movable traction plate is accurate, and the movable traction seat and the movable traction plate are fixed through welding.
The lower end face of the fixed traction plate is provided with a dowel bar which protrudes downwards and is matched with the strip-shaped groove part in shape, and the dowel bar is inserted into the strip-shaped groove part and then welded and fixed with the first plug. Through the positioning cooperation of the dowel bars and the strip-shaped groove parts, the fixed traction plate and the traction frame are fixed more accurately.
The jaw tractor is arranged in the oral cavity when in use, and the lower end surface of the tractor is arc-shaped in order to prevent the tractor from sliding on the mucous membrane of the wound cavity.
As an improvement, the rear part of the screw rod is provided with a second annular blocking shoulder matched with the first blocking head, so that the screw rod is prevented from extending into the accommodating cavity excessively to squeeze the spring.
For the convenience of connection of the screw rod and the adjusting handle, the cross section of the driving end is polygonal, and the adjusting handle is a wrench with a steering coupler. Thus, the adjusting handle can rotate, and the adjusting handle is convenient to operate.
Preferably, the first mounting hole and the second mounting hole are stepped holes, and a large hole of the stepped holes is a tapered hole. The mounting hole can enable the head of the titanium alloy screw to be hidden in the large hole of the mounting hole and not exposed, and the mounting screw is prevented from sliding out of the mucous membrane of the wound cavity.
Alternatively, the left side and the right side of the fixed traction plate are provided with L-shaped first fixing arm parts, each first fixing arm part is provided with three first mounting holes, the middle part of the fixed traction plate is provided with an intermediate arm part extending outwards, and the intermediate arm part is provided with two first mounting holes; the left side and the right side of the movable traction plate are respectively provided with a first movable arm part in an L shape, and each first movable arm part is provided with three second mounting holes.
Compared with the prior art, the invention has the advantages that: when the device is used, only the small opening is cut on corresponding soft tissues of the jawbone, the fixed traction plate is fixed on the jawbone on one side of the cut, then the movable traction plate is fixed on the jawbone on the other side of the cut, during adjustment, the screw rod is rotated, the movable traction plate and the movable traction seat are forced to slide upwards or downwards relative to the screw rod according to the threaded connection adjustment working principle of the screw rod and the threaded hole, a gap is generated, the traction force is utilized to induce the osteogenesis capability of the jawbone to continuously form new bones to fill the gap, the traction distance can be accurately and slowly adjusted through the threaded transmission of the screw rod and the threaded hole, the whole tractor can be detached after the adjustment is completed, then the jawbone wound is processed, and the adjustment process is simple and convenient. It is particularly important that the self-locking spring acts on the rear end face of the screw rod, so that the screw rod keeps moving forwards to enable the first annular shoulder to press the inner end face of the second plug, self-locking is formed on the screw rod, even if external force carelessly bumps against the driving handle or vibration occurs to a certain extent, and the jaw bone self-generated restoring force after traction does not deflect towards the loosening direction, the fixed traction plate and the movable traction plate are ensured to be kept at proper positions all the time, the generated new bone is ensured to be smooth, and the operation quality is good.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is a top view of an embodiment of the present invention;
FIG. 3 is a view in the A-A direction of FIG. 2;
FIG. 4 is a B-B cross-sectional view of FIG. 2;
Fig. 5 is an exploded perspective view of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 5, a first embodiment of the present invention is shown.
The jaw tractor with the self-locking function comprises a traction frame 1, wherein the lower end surface 12 of the traction frame 1 is arc-shaped. The guide groove 11 is formed in the guide groove along the length direction, and the guide groove 11 is axially penetrated, so that the guide groove is convenient to process. The guide groove 11 is composed of a circular groove portion 111 located at the lower portion and a bar-shaped groove portion 112 located at the upper portion, the bar-shaped groove portion 112 communicates with the circular groove portion 111, and the radial maximum width of the circular groove portion 111 is larger than the width of the bar-shaped groove portion 112.
The first plug 2 is welded and fixed at the rear end in the guide groove 11 and shields the rear end opening of the guide groove 11, and the first plug 2 is internally provided with a containing cavity 21 with an opening facing the guide groove 11.
The fixed traction plate 3 is welded and fixed on the traction frame 1 or the first plug 2, and a plurality of first mounting holes 31 for the self-tapping screws to pass through are formed in the fixed traction plate 3; the lower end surface of the fixed traction plate 3 is provided with a dowel bar 32 which protrudes downwards and is matched with the strip-shaped groove part 112 in shape, and the dowel bar 32 is inserted into the strip-shaped groove part 112 and then welded and fixed with the first plug 2. The first mounting hole 31 is a stepped hole, and the large hole portion of the stepped hole is a tapered hole, and the self-tapping screw is a titanium alloy screw with a diameter of 2.0 mm. The left and right sides of the fixed traction plate 3 are provided with L-shaped first fixing arm portions 33, each first fixing arm portion 33 is provided with three first mounting holes 31, the middle portion of the fixed traction plate 3 is provided with an intermediate arm portion 34 extending outwards, and the intermediate arm portion 34 is provided with two first mounting holes 31.
The second plug 4 is welded and fixed at the front end in the guide groove 11, and shields the front end opening of the guide groove 11, and the second plug 4 is provided with a screw rod 7 which is penetrated out.
The movable traction seat 5 is restrained in the guide groove 11 and can axially slide, and a threaded through hole 511 which axially penetrates is formed in the movable traction seat 5; the lower part of the movable traction seat 5 is provided with a cylindrical part 51 with the shape matched with the circular groove part 111, a threaded through hole 511 is arranged on the cylindrical part 51, the middle part of the movable traction seat 5 is provided with a guide part 52 with the shape matched with the strip-shaped groove part 112, and the lower end surface of the movable traction seat 5 is placed on the upper end surface of the traction frame 1.
The movable traction plate 6 is welded and fixed on the movable traction seat 5, and a plurality of second mounting holes 61 for the self-tapping screws to pass through are formed in the movable traction plate 6; the second mounting holes 61 are stepped holes, and the large hole portions of the stepped holes are tapered holes. The left and right sides of the movable traction plate 6 are provided with L-shaped first movable arm portions 64, and three second mounting holes 61 are formed in each of the first movable arm portions 64. The middle part of the upper end surface of the movable traction seat 5 is provided with a fixed column 53 which protrudes upwards, and the movable traction plate 6 is provided with a fixed hole 62 for the fixed column 53 to be inserted and matched; the front and rear sides of the upper end surface of the movable traction seat 5 are provided with upward protruding inserting blocks 54, and the front and rear sides of the movable traction plate 6 are provided with inserting grooves 63 for inserting and matching the inserting blocks 54.
The screw rod 7 is arranged in the guide groove 11 and can rotate around the axis of the screw rod 7, the rear end of the screw rod 7 is movably inserted into the accommodating cavity 21, the front part of the screw rod 7 is provided with a first annular blocking shoulder 71 which is in blocking fit with the second plug 4, the rear part of the screw rod 7 is provided with a second annular blocking shoulder 72 which is in blocking fit with the first plug 2, the front end of the screw rod 7 penetrates out of the second plug 4 to form a driving end 73 which is connected with the adjusting handle 9, and meanwhile, the screw rod 7 penetrates through and is in threaded connection with a threaded through hole 511 on the movable traction seat 5; the traction distance is 0.4mm for each rotation of the screw. The driving end 73 has a polygonal cross section, and the adjusting handle 9 is a wrench with a steering coupler 91.
The self-locking spring 8 is arranged in the accommodating cavity 21 and acts on the rear end face of the screw rod 7, so that the screw rod 7 keeps moving forward, and the first annular stop shoulder 71 presses the inner end face trend of the second plug 4.
In this embodiment, the movable traction plate 3 and the fixed traction plate 6 are made of pure titanium TA3 material, and the other parts are made of titanium alloy TC4 material. The hardness of the titanium alloy is more than or equal to 260HV10, the hardness of the pure titanium is more than or equal to 150HV10, and the self-locking spring 8 is made of stainless steel.
When the jaw tractor is used, the proper type of the jaw tractor is selected, the tractor mounting position is determined, only a small opening is needed to be cut in corresponding jaw soft tissues, the fixed traction plate 3 is fixed on the jaw on one side of the incision, then the movable traction plate 6 is fixed on the jaw on the other side of the incision, during adjustment, the inner hexagon of the adjusting handle 9 is inserted into the small outer hexagon driving end 72 on the screw rod 7, the adjusting handle 9 is rotated clockwise (in the direction indicated by an arrow mark on the handle), the screw rod 7 is driven to rotate, the working principle is adjusted according to the threaded connection of the screw rod 7 and the threaded hole 511, the movable traction plate 6 and the movable traction seat 5 are forced to slide forwards or backwards relative to the screw rod 4, the traction distance is 0.4mm every time the screw rod 4 rotates, a gap is generated, the traction force is utilized to induce the osteogenesis capacity of the jaw to continuously form new bones to fill the gap, the traction distance can be accurately and slowly adjusted through the threaded transmission of the screw rod 4 and the threaded hole 511, and the traction is stopped after the clinical expected effect is achieved. Finally, the whole tractor can be disassembled only by disassembling the fixed traction plate 3 and the movable traction plate 6, then the jaw wound surface is treated, and the adjusting process is simple and convenient.
In the process of bone formation, the self-locking spring 8 acts on the rear end face of the screw rod 7, so that the screw rod 7 keeps moving forward, the first annular stop shoulder 71 presses the inner end face of the second plug 4, self-locking is formed on the screw rod 7 (the screw rod 7 is not easy to rotate), even if external force carelessly hits the driving adjusting handle 9 or vibration is generated to a certain extent, the screw rod 7 can not deflect towards a loosening direction due to the restoring force of the jaw bone after traction, the fixed traction plate 3 and the movable traction plate 6 are ensured to be kept at proper positions all the time, the generated new bone is ensured to be smooth, and the operation quality is good.
While the preferred embodiments of the present invention have been described in detail, it is to be clearly understood that the same may be varied in many ways 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 jaw tractor with self-locking function, which is characterized in that: comprising
A traction frame (1) which is provided with a guide groove (11) arranged along the length direction;
The first plug (2) is fixed at the rear end in the guide groove (11), and an accommodating cavity (21) with an opening facing the guide groove (11) is arranged in the first plug (2);
the fixed traction plate (3) is fixed on the traction frame (1) or the first plug (2), and a plurality of first mounting holes (31) for self-tapping screws to penetrate are formed in the fixed traction plate (3);
The second plug (4) is fixed at the front end in the guide groove (11);
the movable traction seat (5) is restrained in the guide groove (11) and can axially slide, and a threaded through hole (511) which axially penetrates is formed in the movable traction seat (5);
The movable traction plate (6) is fixed on the movable traction seat (5), and a plurality of second mounting holes (61) for the self-tapping screws to penetrate are formed in the movable traction plate (6);
The screw rod (7) is arranged in the guide groove (11) and can rotate around the axis of the screw rod, the rear end of the screw rod (7) is movably inserted into the accommodating cavity (21), the front part of the screw rod (7) is provided with a first annular blocking shoulder (71) which is matched with the second plug (4) in a blocking way, the front end of the screw rod (7) penetrates out of the second plug (4) to form a driving end (73) connected with the adjusting handle (9), and meanwhile, the screw rod (7) penetrates through and is in threaded connection with a threaded through hole (511) on the movable traction seat (5);
The self-locking spring (8) is arranged in the accommodating cavity (21) and acts on the rear end face of the screw rod (7), so that the screw rod (7) keeps moving forwards to enable the first annular blocking shoulder (71) to press the inner end face trend of the second plug (4);
The guide groove (11) consists of a circular groove part (111) positioned at the lower part and a strip-shaped groove part (112) positioned at the upper part, the strip-shaped groove part (112) is communicated with the circular groove part (111), and the radial maximum width of the circular groove part (111) is larger than the width of the strip-shaped groove part (112); the lower part of the movable traction seat (5) is provided with a cylindrical part (51) with the shape matched with the circular groove part (111), the threaded through hole (511) is arranged on the cylindrical part (51), the middle part of the movable traction seat (5) is provided with a guide part (52) with the shape matched with the strip-shaped groove part (112), and the lower end surface of the movable traction seat (5) is placed on the upper end surface of the traction frame (1);
the lower end face of the fixed traction plate (3) is provided with a dowel bar (32) which protrudes downwards and is matched with the strip-shaped groove part (112) in shape, and the dowel bar (32) is inserted into the strip-shaped groove part (112) and then welded and fixed with the first plug (2);
The rear part of the screw rod (7) is provided with a second annular stop shoulder (72) which is matched with the first plug (2) in a blocking way.
2. The self-locking function jaw retractor of claim 1, wherein: the middle part of the upper end surface of the movable traction seat (5) is provided with a fixed column (53) protruding upwards, and the movable traction plate (6) is provided with a fixed hole (62) for the fixed column (53) to be inserted and matched; the front side and the rear side of the upper end surface of the movable traction seat (5) are provided with inserting blocks (54) protruding upwards, and the front side and the rear side of the movable traction plate (6) are provided with inserting grooves (63) for the inserting blocks (54) to be inserted.
3. The self-locking function jaw retractor of claim 1, wherein: the lower end face (12) of the traction frame (1) is arc-shaped.
4. The self-locking function jaw retractor of claim 1, wherein: the cross section of the driving end (73) is polygonal, and the adjusting handle (9) is a spanner with a steering coupler (91).
5. The self-locking function jaw retractor of claim 1, wherein: the first mounting hole (31) and the second mounting hole (61) are both stepped holes, and the large hole part of each stepped hole is a conical hole.
6. The self-locking function jaw retractor of claim 1, wherein: the left side and the right side of the fixed traction plate (3) are respectively provided with a first fixing arm part (33) in an L shape, each first fixing arm part (33) is provided with three first mounting holes (31), the middle part of the fixed traction plate (3) is provided with a middle arm part (34) extending outwards, and the middle arm part (34) is provided with two first mounting holes (31); the left side and the right side of the movable traction plate (6) are respectively provided with a first movable arm part (64) which is L-shaped, and each first movable arm part (64) is provided with three second mounting holes (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517825.9A CN109567883B (en) | 2018-05-25 | 2018-05-25 | Jaw tractor with self-locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517825.9A CN109567883B (en) | 2018-05-25 | 2018-05-25 | Jaw tractor with self-locking function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109567883A CN109567883A (en) | 2019-04-05 |
| CN109567883B true CN109567883B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810517825.9A Active CN109567883B (en) | 2018-05-25 | 2018-05-25 | Jaw tractor with self-locking function |
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| CN (1) | CN109567883B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110693588B (en) * | 2019-11-19 | 2024-11-01 | 宁波慈北医疗器械有限公司 | Jaw tractor capable of preventing rotation |
| CN112107354A (en) * | 2020-10-22 | 2020-12-22 | 上海交通大学医学院附属第九人民医院 | Maxillary sinus jaw bone penetrating tractor manufactured through three-dimensional printing |
| CN112971958B (en) * | 2020-12-29 | 2024-11-05 | 宁波慈北医疗器械有限公司 | External mandible tractor |
| CN114886531A (en) * | 2022-03-10 | 2022-08-12 | 上海理工大学 | Self-locking binding belt type bone stretching device |
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| CN1988852A (en) * | 2004-05-19 | 2007-06-27 | 芯赛斯公司 | Snap-lock for drill sleeve |
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| CN201026231Y (en) * | 2007-03-13 | 2008-02-27 | 沈国芳 | Dismountable harnpan jawbone traction device |
| CN107205757A (en) * | 2014-11-05 | 2017-09-26 | 小托马斯·S·约翰斯顿 | Disengageable actuator arm for a traction device |
| CN104665901A (en) * | 2015-03-02 | 2015-06-03 | 宁波慈北医疗器械有限公司 | Alveolar bone tractor |
| KR20160003609U (en) * | 2015-04-09 | 2016-10-19 | 주식회사 제일메디칼코퍼레이션 | Plate separate type bone distrator |
| CN206324813U (en) * | 2016-10-20 | 2017-07-14 | 美茵（北京）医疗器械研发有限公司 | A kind of anticreep lifting hook device device of simple operation |
| CN209074720U (en) * | 2018-05-25 | 2019-07-09 | 宁波慈北医疗器械有限公司 | A kind of jaw bone tractor of self-locking function |
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| CN109567883A (en) | 2019-04-05 |
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