CN221105987U - Built-in maxillary tractor - Google Patents
Built-in maxillary tractor Download PDFInfo
- Publication number
- CN221105987U CN221105987U CN202420243144.9U CN202420243144U CN221105987U CN 221105987 U CN221105987 U CN 221105987U CN 202420243144 U CN202420243144 U CN 202420243144U CN 221105987 U CN221105987 U CN 221105987U
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- Prior art keywords
- sleeve
- screw rod
- hole
- maxillary
- baffle
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- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 210000005069 ears Anatomy 0.000 claims 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 210000002050 maxilla Anatomy 0.000 abstract description 2
- 210000000988 bone and bone Anatomy 0.000 description 17
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000011164 ossification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000017423 tissue regeneration Effects 0.000 description 1
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- Fishing Rods (AREA)
Abstract
The utility model provides a built-in maxillary tractor which comprises a first fixing component, a second fixing component and a transmission component, wherein the first fixing component comprises a first sleeve and a first wing, and the second fixing component comprises a second sleeve and a second wing; the first wing piece and the second wing piece are provided with a plurality of fixing holes; the transmission assembly comprises a sleeve, a screw and an adjusting rod, wherein a chute is formed in one side of the sleeve; the first fixing component is detachably fixed at the tail part of the sleeve; the second sleeve is provided with internal threads, the second fixing assembly is detachably arranged on the transmission assembly, and when the screw is driven by the adjusting rod to rotate in the sleeve, the first fixing assembly moves along the length direction of the sleeve under the guidance of the sliding groove. According to the utility model, the first fixing component and the second fixing component which are detachably connected with the transmission component are used for adjusting the distance between the first wing piece and the second wing piece and improving the convenience of installing and detaching the maxilla.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and particularly relates to a built-in maxillary tractor.
Background
The stretching osteogenesis is an endogenous bone tissue engineering technology, which is characterized in that a bone is cut, special stretching devices are arranged on two sides of a bone cutting line, and after a certain delay period (5-7 days), a bone cutting gap (1-1.5 mm/day) is slowly stretched, so that the bone cutting gap is widened continuously, the potential of organism tissue regeneration is excited, new bone tissue is formed continuously in the stretching gap, and simultaneously muscles, nerves, blood vessels, skin and the like around the bone are prolonged in an equivalent period, so that the purpose of prolonging the bone is achieved.
Most of the existing retractors are for fixing stability, most of the components are integrally manufactured, and have certain limitations for adapting to bone retraction at different positions and angles.
Disclosure of utility model
The utility model aims to improve the stability of a built-in maxillary tractor and the convenience of mounting and dismounting the built-in maxillary tractor, and provides the built-in maxillary tractor.
The technical scheme adopted for solving the technical problems is as follows: the built-in maxillary tractor comprises a first fixing component, a second fixing component and a transmission component, wherein the first fixing component comprises a first sleeve and first fins connected to two sides of the first sleeve, and the second fixing component comprises a second sleeve and second fins connected to two sides of the second sleeve; the first wing piece and the second wing piece are provided with a plurality of fixing holes;
The transmission assembly comprises a sleeve with a sliding groove at one side, a screw rod coaxially connected in the sleeve and an adjusting rod connected with the screw rod, and one end of the screw rod extends out of the sleeve and is connected with the adjusting rod; the first fixing component is detachably fixed at the tail part of the sleeve; the second sleeve is provided with internal threads, the second fixing assembly is detachably arranged on the transmission assembly in a mode that the second sleeve is arranged in the sleeve and in threaded connection with the screw rod, and when the screw rod is driven by the adjusting rod to rotate in the sleeve, the second fixing assembly moves along the length direction of the sleeve under the guidance of the sliding groove.
Further, the transmission assembly comprises a coupler, and the adjusting rod is connected with the screw rod through the coupler;
The coupler comprises a first connecting column, a second connecting column and a connecting block, the screw is connected with the first connecting column, and the adjusting rod is connected with the second connecting column; the connecting block is provided with a first pin shaft and a second pin shaft which are mutually perpendicular, and the end parts of the first pin shaft and the second pin shaft respectively protrude out of two opposite surfaces of the connecting block; the first connecting column is connected with the connecting block through a first pin shaft, and the second connecting column is connected with the connecting block through a second pin shaft.
Further, two first connecting lugs are arranged on the end face of the first connecting column, each first connecting lug is provided with a first connecting hole, and the two first connecting lugs are connected to two sides of the connecting block through the first connecting holes through first pin shafts respectively;
The terminal surface of second spliced pole is equipped with two second engaging lugs, and every second engaging lug has the second connecting hole, two the second engaging lug pass respectively through the second round pin axle the second connecting hole connect in the both sides of connecting block.
Further, the transmission assembly comprises a locking piece, a first baffle with the caliber smaller than that of the inner wall of the first sleeve is arranged at one end of the first sleeve, the first sleeve is sleeved at the tail of the sleeve, the first sleeve is abutted to the end part of the sleeve through the first baffle, and the locking piece is locked and fastened at the tail of the sleeve in a mode that the locking piece partially penetrates through the first baffle and abuts against the sleeve.
Further, the retaining member comprises an abutting portion and a connecting portion perpendicularly connected to the abutting portion, an internal thread is arranged at the tail portion of the sleeve, a threaded column matched with the internal thread is arranged at the connecting portion, the retaining member abuts against the first baffle through the abutting portion, the connecting portion penetrates through the first baffle to be in threaded connection with the sleeve, and the first sleeve is locked and fixed at the tail portion of the sleeve.
Further, the threaded column is further provided with a relief groove with a hole diameter larger than the outer diameter of the screw, and the end part of the screw is inserted into the relief groove.
Further, the first fixing component comprises two first fins, the second fixing component comprises two second fins, the two first fins and the two second fins are arranged in a straight line shape, and the fixing holes are also arranged in a straight line shape on the first fins and the second fins.
Further, the first connecting column is provided with a through hole and a plug hole communicated with the through hole, the through hole is arranged along the axis direction of the screw, and the plug hole is arranged perpendicular to the axis direction of the screw; the screw rod is close to one end of the first connecting column and is provided with a connecting groove perpendicular to the through hole and the inserting hole, the screw rod is inserted into the through hole, and the screw rod is locked and fixed with the first connecting column through a third bolt inserted into the connecting groove through the inserting hole.
Further, the transmission assembly further comprises a third sleeve, one end of the third sleeve is provided with a second baffle with a caliber smaller than that of the inner wall of the third sleeve, the third sleeve is sleeved at the head end of the sleeve, and the second baffle abuts against the end face of the head end of the sleeve; the end part of the screw rod extends out of the second baffle to be connected with the first connecting column, and the first connecting column is abutted with one side, away from the sleeve, of the second baffle.
Further, the outer wall of the sleeve is polygonal, and the inner walls of the first sleeve and the third sleeve are polygonal and are matched with the outer wall of the sleeve.
The built-in maxillary tractor provided by the utility model has the beneficial effects that: the first fixed subassembly detachable is connected in sheathed tube afterbody, and the installation and the dismantlement of first fixed subassembly of being convenient for are fixed subassembly through being connected on drive assembly with screw threaded connection detachable, when satisfying the interval adjustment between first fixed subassembly and the second fixed subassembly, and the fixed demand of the fixed subassembly of the first fixed subassembly of drive assembly and different shapes, second fixed subassembly collocation use of being convenient for satisfies different position bones.
Drawings
FIG. 1 is a schematic view of the construction of a built-in maxillary retractor according to the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model providing a built-in maxillary retractor;
FIG. 3 is another schematic view of the built-in maxillary retractor of the present utility model;
In the figure:
1. A first fixing assembly; 11. a first sleeve; 111. a first baffle; 12. a first fin; 2. a second fixing assembly; 21. a second sleeve; 22. a second fin; 3. a transmission assembly; 31. a sleeve; 311. a chute; 32. a screw; 33. an adjusting rod; 4. a fixing hole; 5. a locking member; 51. an abutting portion; 52. a connection part; 6. a coupling; 61. a first connection post; 611. a first connection lug; 612. a first connection hole; 62. a second connection post; 621. a second connecting ear; 622. a second connection hole; 63. a connecting block; 631. a first pin; 632. a second pin; 7. a third latch; 8. a third sleeve; 81. and a second baffle.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, a schematic view of a built-in maxillary retractor according to an embodiment of the present utility model includes a first fixing component 1, a second fixing component 2 and a driving component 3, wherein the first fixing component 1 includes a first sleeve 11 and first fins 12 (see fig. 3) connected to two sides of the first sleeve 11, and the second fixing component 2 includes a second sleeve 21 and second fins 22 connected to two sides of the second sleeve 21; the first wing piece 12 and the second wing piece 22 are respectively provided with a plurality of fixing holes 4 for fixing the maxillary tractor and the bone, and the connection tightness of the maxillary tractor and the bone can be enhanced and the use stability of the maxillary tractor can be improved by arranging the plurality of fixing holes 4.
The transmission assembly 3 comprises a sleeve 31, a screw rod 32 and an adjusting rod 33 (see fig. 2), wherein a chute 311 for the second fixing assembly 2 to move is formed in one side of the sleeve 31, the screw rod 32 is coaxially connected in the sleeve 31, one end of the screw rod 32 extends out of the sleeve 31 and is connected with the adjusting rod 33, and the distance between the first fixing assembly 1 and the second fixing assembly 2 is adjusted through the adjusting rod 33; the first fixing component 1 is detachably fixed at the tail part of the sleeve 31, specifically, one end of the sleeve 31, which is close to the adjusting rod 33, is a head part, and one end of the sleeve 31, which is far away from the adjusting rod 33, is a tail part; the second sleeve 21 is provided with an internal thread matched with the screw rod 32, the second fixing component 2 is detachably arranged on the transmission component 3 in a mode that the second sleeve 21 is arranged in the sleeve 31 and is in threaded connection with the screw rod 32, when the screw rod 32 is driven by the adjusting rod 33 to rotate in the sleeve 31, the second fixing component 2 and the screw rod 32 relatively rotate, so that the second fixing component 2 moves in the sliding groove 311, the second fixing component 2 moves along the length direction of the sleeve 31 under the guidance of the sliding groove 311, the distance between the first fixing component 1 and the second fixing component 2 is adjusted, so that different periods and different angles of bone growth are adapted, and the first fixing component 1 and the second fixing component 2 are detachably connected with the sleeve 31, so that the convenience of the installation and the detachment of a maxilla can be improved.
Because the first fixing component 1, the second fixing component 2 and the transmission component 3 are detachably assembled together, the first fixing component 1, the second fixing component 2 and the transmission component 3 with different shapes are convenient to be matched for use, so that the fixing requirements of bones at different positions are met.
In one embodiment of the present utility model, the transmission assembly 3 includes a coupling 6, and the coupling 6 is connected between the adjusting rod 33 and the screw rod 32, and is used for driving the screw rod 32 and the adjusting rod 33 to rotate synchronously; the coupling 6 comprises a first connecting column 61, a second connecting column 62 and a connecting block 63 for connecting the first connecting column 61 and the second connecting column 62, the screw 32 is connected with the first connecting column 61, and the adjusting rod 33 is connected with the second connecting column 62; the side of the connecting block 63 is provided with a first pin shaft 631 and a second pin shaft 632 which are mutually perpendicular, and the end parts of the first pin shaft 631 and the second pin shaft 632 respectively protrude out of two opposite surfaces on the connecting block 63; the first connecting column 61 is connected with the connecting block 63 through the first pin shaft 631, the second connecting column 62 is connected with the connecting block 63 through the second pin shaft 632, so that the connection between the first connecting column 61 and the second connecting column 62 is realized, the connection between the screw rod 32 and the adjusting rod 33 is realized, the screw rod 32 is driven to rotate through the coupler 6 under the driving of the adjusting rod 33, the synchronous driving of the screw rod 32 and the adjusting rod 33 is realized, and the distance adjustment between the first fixing assembly 1 and the second fixing assembly 2 is realized. The above-mentioned coupling 6 can realize the rotation of the adjusting lever 33 in a predetermined direction, thereby facilitating the rotation operation of the screw 32, and the coupling 6 is more flexible to rotate in a predetermined direction but not in a non-predetermined direction with respect to the spherical universal joint.
In one embodiment of the present utility model, one end surface of the first connecting post 61 is provided with two first connecting lugs 611, the two first connecting lugs 611 are vertically arranged on the same end surface of the first connecting post 61, the two first connecting lugs 611 are parallel to each other, each first connecting lug 611 is provided with a first connecting hole 612, and the two first connecting lugs 611 are connected to two parallel sides of the connecting block 63 through the two first connecting holes 612 respectively by two first pin shafts 631; one end face of the second connecting column 62 is provided with two second connecting lugs 621, the two second connecting lugs 621 are vertically arranged on the same end face of the second connecting column 62, the two second connecting lugs 621 are mutually parallel, each second connecting lug 621 is provided with a second connecting hole 622, the two second connecting lugs 621 and the two first connecting lugs 611 are arranged in a staggered mode and are connected to two mutually parallel side edges of the connecting block 63 through the two second connecting holes 622 respectively by two second pin shafts 632, and therefore detachable connection of the first connecting column 61 and the second connecting column 62 is achieved, and the installation and detachment efficiency of the maxillary tractor is improved.
In one embodiment of the present utility model, the transmission assembly 3 includes a locking member 5, one end of the first sleeve 11 is provided with a first baffle 111 having a caliber smaller than that of the inner wall of the first sleeve 11, the first sleeve 11 is sleeved on the outer wall of the tail of the sleeve 31 and is abutted to the end of the sleeve 31 through the first baffle 111, a part of the locking member 5 passes through the baffle and stretches into the first sleeve 11 to be connected with the sleeve 31, and the locking member 5 is tightly abutted to the first baffle 111 to lock and fix the first baffle 111 on the tail of the sleeve 31, and the convenient connection between the first sleeve 11 and the sleeve 31 is realized through the detachable connection between the locking member 5 and the sleeve 31, so that the convenience in mounting and dismounting the first fixing assembly 1 and the sleeve 31 is improved.
In one embodiment of the present utility model, the locking member 5 includes an abutment portion 51 and a connecting portion 52 vertically connected to the abutment portion 51, the tail portion of the sleeve 31 is provided with an internal thread, the connecting portion 52 of the locking member 5 is provided with a threaded post adapted to the internal thread, the threaded post of the locking member 5 passes through the first baffle 111 to be in threaded connection with the tail portion of the sleeve 31, and the abutment portion 51 of the locking member 5 abuts against a side of the first baffle 111 away from the sleeve 31, so as to realize locking fixation of the first sleeve 11 on the sleeve 31, specifically, the outer side wall of the abutment portion 51 is at least partially flush with the outer side wall of the first sleeve 11, thereby ensuring smoothness of the connection between the first sleeve 11 and the locking member 5 and reducing discomfort of connection of the maxillary tractor with bone.
In one embodiment of the present utility model, the threaded post further has a relief groove with a hole diameter larger than the outer diameter of the screw rod 32, when the locking member 5 is inserted into the sleeve 31, the end of the screw rod 32 can be inserted into the relief groove to perform relief, the obstruction of the screw rod 32 to the threaded connection between the locking member 5 and the sleeve 31 is reduced, and when the locking member 5 is in threaded connection with the sleeve 31, the end of the screw rod 32 abuts against the groove bottom of the relief groove, meanwhile, the side wall of the screw rod 32 abuts against the inner side wall of the relief groove, the outer side wall of the relief groove, namely, the threaded portion of the threaded post, is tightly connected with the sleeve 31, so that the side wall of the relief groove forms a connecting bearing between the tail end of the sleeve 31 and the end of the screw rod 32, thereby realizing tight connection between the screw rod 32 and the sleeve 31, and realizing fixation between the first sleeve 11 and the screw rod 32, and improving the connection stability of the maxillary tractor.
In one embodiment of the present utility model, the first fixing component 1 comprises two first fins 12, the second fixing component 2 comprises two second fins 22, the two first fins 12 and the two second fins 22 are arranged in a straight shape, and the fixing holes 4 are also arranged in a straight shape on the first fins 12 and the second fins 22, so that the contact area of the first fins 12 and the second fins 22 with bones is increased, the stability of the connection of the maxillary tractor with the bones is improved, specifically, the total number of the fixing holes 4 of the first fins 12 and the second fins 22 is eight, and therefore, the maxillary tractor is fixed with the bones through the eight fixing holes 4, and the fixing stability of the maxillary tractor is sufficiently improved. The thickness of the first fin 12 and the second fin 22 is generally about 1mm, so that bending adjustment can be performed according to the shape of the fixing surface while securing structural strength.
In one embodiment of the utility model, the first connecting column 61 is provided with a through hole and a plugging hole communicated with the through hole, the through hole is arranged along the axial direction of the screw rod 32, the plugging hole is arranged perpendicular to the axial direction of the screw rod 32, one end of the screw rod 32 close to the first connecting column 61 is provided with a connecting groove perpendicular to the through hole and the plugging hole, one end of the screw rod 32 far away from the first sleeve 11 is inserted into the through hole until the connecting groove of the screw rod 32 is communicated with the plugging hole, and then the screw rod 32 and the first connecting column 61 are locked and fixed through the third bolt 7 and abutted against the bottom of the connecting groove, so that the coupler 6 and the screw rod 32 are assembled and fixed, and the coupler 6 drives the screw rod 32 to synchronously rotate.
In one embodiment of the present utility model, the maxillary tractor further includes a third sleeve 8, one end of the third sleeve 8 is provided with a second baffle 81 having a caliber smaller than that of the inner wall of the third sleeve 8, the third sleeve 8 is sleeved at the head end of the sleeve 31, specifically, the third sleeve 8 and the second sleeve 21 are the same in shape and are connected at two ends of the sleeve 31 in opposite directions, the third sleeve 31 is rotatably sleeved at the outer wall of the head end of the sleeve 31 and is abutted with the end face of the head end of the sleeve 31 through the second baffle 81, one end of the screw rod 32 extends out of the second baffle 81 to be connected with the first connecting column 61, and the first connecting column 61 and one side of the second baffle 81, facing away from the sleeve 31, are abutted with each other, namely, the second baffle 81 is abutted between the end face of the first connecting column 61 and the end face of the sleeve 31 to form a connecting bearing between the first connecting column 61 and the sleeve 31, so that the third sleeve 8 is sleeved on the screw rod 32 and is tightly connected between the sleeve 31 and the first connecting column 61, and the tight connection between the first connecting column 61 and the screw rod 31 is realized, and the tight connection between the first connecting column 61 and the screw rod 31 is improved, and the tight connection of the coupling 6 and the screw rod 31 is tightly connected.
In one embodiment of the present utility model, the outer wall of the sleeve 31 is polygonal with a plurality of ribs, the inner walls of the first sleeve 11 and the third sleeve 8 have polygonal inner walls adapted to the outer wall of the sleeve 31, thereby achieving tight connection of the first sleeve 11 and the third sleeve 8 with the sleeve 31, and the relative rotation of the first sleeve 11 and the third sleeve 8 with the sleeve 31 can be reduced by the plurality of ribs, achieving stability of the maxillary retractor.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The built-in maxillary tractor is characterized by comprising a first fixing component, a second fixing component and a transmission component, wherein the first fixing component comprises a first sleeve and first fins connected to two sides of the first sleeve, and the second fixing component comprises a second sleeve and second fins connected to two sides of the second sleeve; the first wing piece and the second wing piece are provided with a plurality of fixing holes;
The transmission assembly comprises a sleeve with a sliding groove at one side, a screw rod coaxially connected in the sleeve and an adjusting rod connected with the screw rod, and one end of the screw rod extends out of the sleeve and is connected with the adjusting rod; the first fixing component is detachably fixed at the tail part of the sleeve; the second sleeve is provided with internal threads, the second fixing assembly is detachably arranged on the transmission assembly in a mode that the second sleeve is arranged in the sleeve and in threaded connection with the screw rod, and when the screw rod is driven by the adjusting rod to rotate in the sleeve, the second fixing assembly moves along the length direction of the sleeve under the guidance of the sliding groove.
2. The built-in maxillary retractor of claim 1, wherein said transmission assembly comprises a coupler and said adjustment rod is coupled to said screw via said coupler;
The coupler comprises a first connecting column, a second connecting column and a connecting block, the screw is connected with the first connecting column, and the adjusting rod is connected with the second connecting column; the connecting block is provided with a first pin shaft and a second pin shaft which are mutually perpendicular, and the end parts of the first pin shaft and the second pin shaft respectively protrude out of two opposite surfaces of the connecting block; the first connecting column is connected with the connecting block through a first pin shaft, and the second connecting column is connected with the connecting block through a second pin shaft.
3. The built-in maxillary retractor according to claim 2, wherein two first connection ears are provided on an end surface of the first connection post, each of the first connection ears has a first connection hole, and the two first connection ears are connected to both sides of the connection block through the first connection holes respectively by a first pin shaft;
The terminal surface of second spliced pole is equipped with two second engaging lugs, and every second engaging lug has the second connecting hole, two the second engaging lug pass respectively through the second round pin axle the second connecting hole connect in the both sides of connecting block.
4. The built-in maxillary retractor according to claim 2, wherein the transmission assembly comprises a locking member, a first baffle having a smaller caliber than an inner wall of the first sleeve is provided at one end of the first sleeve, the first sleeve is sleeved at the tail of the sleeve and abuts against an end of the sleeve through the first baffle, and the locking member locks and fastens the first sleeve at the tail of the sleeve in a manner of partially penetrating through the first baffle and abutting against the sleeve.
5. The internal maxillary retractor of claim 4, wherein the locking member includes an abutment and a connection perpendicularly connected to the abutment, the sleeve tail is provided with an internal thread, the connection is provided with a threaded post adapted to the internal thread, the locking member abuts the first baffle via the abutment and the connection passes through the first baffle to be screwed with the sleeve, and the first sleeve is locked to the sleeve tail.
6. The in-line maxillary retractor of claim 5, wherein the threaded post further has a relief groove having a larger bore diameter than an outer diameter of the screw, the end of the screw being inserted into the relief groove.
7. The intramaxillary retractor of claim 1, wherein said first fixing component comprises two said first tabs, said second fixing component comprises two said second tabs, both said first tabs and both said second tabs are arranged in a straight line, and said fixing holes are also arranged in a straight line on said first tabs and second tabs.
8. The built-in maxillary retractor according to claim 3, wherein the first connecting post is provided with a through hole and a socket hole communicating with the through hole, the through hole is provided along the axis direction of the screw, and the socket hole is provided perpendicular to the axis direction of the screw; the screw rod is close to one end of the first connecting column and is provided with a connecting groove perpendicular to the through hole and the inserting hole, the screw rod is inserted into the through hole, and the screw rod is locked and fixed with the first connecting column through a third bolt inserted into the connecting groove through the inserting hole.
9. The built-in maxillary tractor of claim 1, wherein the transmission assembly further comprises a third sleeve, a second baffle with a caliber smaller than that of the inner wall of the third sleeve is arranged at one end of the third sleeve, the third sleeve is sleeved at the head end of the sleeve, and the second baffle abuts against the end face of the head end of the sleeve; the end part of the screw rod extends out of the second baffle to be connected with the first connecting column, and the first connecting column is abutted with one side, away from the sleeve, of the second baffle.
10. The intramaxillary retractor of claim 9, wherein the outer wall of said cannula is polygonal with a plurality of ribs and the inner walls of said first and third sleeves have polygonal inner walls that fit the outer wall of said cannula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420243144.9U CN221105987U (en) | 2024-01-31 | 2024-01-31 | Built-in maxillary tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420243144.9U CN221105987U (en) | 2024-01-31 | 2024-01-31 | Built-in maxillary tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221105987U true CN221105987U (en) | 2024-06-11 |
Family
ID=91362307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420243144.9U Active CN221105987U (en) | 2024-01-31 | 2024-01-31 | Built-in maxillary tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221105987U (en) |
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2024
- 2024-01-31 CN CN202420243144.9U patent/CN221105987U/en active Active
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