CN215688351U - External mandible tractor - Google Patents
External mandible tractor Download PDFInfo
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- CN215688351U CN215688351U CN202023245622.0U CN202023245622U CN215688351U CN 215688351 U CN215688351 U CN 215688351U CN 202023245622 U CN202023245622 U CN 202023245622U CN 215688351 U CN215688351 U CN 215688351U
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Abstract
An external mandible tractor which is characterized in that: comprises a plurality of guide rods; the fixed front bracket is fixed at the front end of each guide rod; the fixed rear support is fixed at the rear end of each guide rod, the left side and the right side of the fixed rear support are respectively provided with a fixed traction plate, and the two fixed traction plates are respectively provided with a first positioning hole for a first traction screw to penetrate through; the front end of the screw rod penetrates through the fixed front bracket to form a driving end in transmission connection with the adjusting handle; the movable support is sleeved on each guide rod and can slide back and forth, a threaded through hole which penetrates through the movable support in the axial direction is formed in the movable support, the screw rod penetrates through the threaded through hole and is in threaded connection with the threaded through hole, the left side and the right side of the movable support are respectively provided with a movable traction plate, and the movable traction plate is provided with second positioning holes for the second traction screws to penetrate through. The structure is an external mandible tractor, which can accurately and symmetrically drive traction screws into the left side and the right side of the bottom of the mandible from the outside, and the mandible is cut after the screws are driven, so the operation is simple and convenient.
Description
Technical Field
The utility model belongs to the technical field of medical instruments for oral and jaw surgery and plastic surgery, and particularly relates to an external mandible tractor.
Background
At present, there is a special retractor for jaw bone, which is widely used in oral, maxillofacial or cranial surgery and plastic surgery, and the technical principle of the retractor can be summarized as follows: the soft tissue around the jawbone is firstly cut, after the mandible is completely or incompletely cut, the broken end of the bone is gradually propped open by external force to form a gap, the bone forming capability of the jawbone is induced by traction force, and new bone is continuously formed to fill the gap, so that the aim of prolonging the mandible is fulfilled. The technology utilizes the regeneration potential of organism tissues and can repair bone defects or defect deformities caused by various congenital or acquired reasons.
For example, chinese utility model patent No. ZL95200175.6 (publication No. CN2205709Y) 'a jaw traction extender', chinese utility model patent No. ZL98225259.5 (publication No. CN2341572Y) 'jaw traction extender', and chinese utility model patent No. ZL99234512.x (publication No. CN2378010Y) 'oral cavity lower jaw traction extender' all disclose jaw tractors having the same working principle. All adopt the screw rod as towed drive disk assembly, rotate the adjustment handle during operation and drive the screw rod rotatory, and then drive the removal of activity traction plate.
The existing tractor is a built-in tractor, two sides of the existing tractor are respectively provided with one tractor, the operation is complex, the position fixing plate needs to be manually shaped when being installed, the burden of a doctor is increased, the operation time is delayed, and the operation risk is relatively increased. After the operation, various problems can occur, such as traction convolution and inconsistent traction distances at two sides, which leads to the need of secondary operation. If the mounting angles of the retractors on the two sides are too large, the retractors can be blocked after being retracted for a certain distance, and the operation fails.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide an external mandible tractor with a brand new structure aiming at the current situation of the prior art, the tractor can simultaneously draw the mandible at two sides, and can accurately drive a traction screw into the mandible, thereby greatly reducing the risk of a patient in the operation.
The technical scheme adopted by the utility model for solving the technical problems is as follows: an external mandible tractor which is characterized in that: comprises a plurality of guide rods which are arranged in parallel at intervals; the fixed front bracket is fixed at the front end of each guide rod; the fixed rear support is fixed at the rear end of each guide rod, the left side and the right side of the fixed rear support are respectively provided with a fixed traction plate for fixing the left bottom and the right bottom of the mandible, and the two fixed traction plates are respectively provided with a first positioning hole for a first traction screw to penetrate through; the front end of the screw rod can rotate around the axis of the screw rod, the front end of the screw rod is supported on the fixed front support, the rear end of the screw rod is supported on the fixed rear support, and the front end of the screw rod penetrates through the fixed front support to form a driving end in transmission connection with the adjusting handle; the movable support is arranged between the fixed front support and the fixed rear support and sleeved on each guide rod to slide forwards and backwards, a threaded through hole which runs through in the axial direction is formed in the movable support, the screw rod penetrates through the threaded through hole and is in threaded connection with the threaded through hole, the left side and the right side of the movable support are respectively provided with a movable traction plate which is used for being fixed to the bottom of the left side and the bottom of the right side of the mandible, and a second positioning hole for the second traction screw to penetrate through is formed in the movable traction plate.
In order to enable the fixed traction plate and the movable traction plate to adjust proper distances according to different patients, the fixed traction plate is further improved, first adjusting rod pieces which can only slide left and right are inserted at the left side and the right side of the fixed rear support, the first adjusting rod pieces are fixed on the fixed rear support through first set screws, and the fixed traction plate is installed on the first adjusting rod pieces; the left side and the right side of the movable support are respectively inserted with a second adjusting rod piece which can only slide left and right, the second adjusting rod piece is fixed on the movable support through a second set screw, and the movable traction plate is installed on the second adjusting rod piece. The relative distance of two first regulating rod pieces can be regulated, so that the relative distance of two fixed traction plates can be regulated, and the relative distance of two second regulating rod pieces can be regulated, so that the relative distance of two movable traction plates can be regulated, therefore, the structure can be better adapted to a patient.
In order to enable the fixed traction plate and the movable traction plate to adjust proper angles according to different patients, the angle adjusting device is further improved, the top surface of the first adjusting rod piece is provided with first upper end surface teeth, the bottom surface of the fixed traction plate is provided with first lower end surface teeth matched with the first upper end surface teeth in a clamping mode, and the fixed traction plate and the first adjusting rod piece are connected in a locking mode through a first compression screw, so that the first upper end surface teeth and the first lower end surface teeth are locked in an occlusion mode; and second upper end face teeth are arranged on the top surface of the second adjusting rod piece, second lower end face teeth which are matched with the second upper end face teeth in a clamping mode are arranged on the bottom surface of the movable traction plate, and the movable traction plate is connected with the second adjusting rod piece in a locking mode through a second compression screw, so that the second upper end face teeth and the second lower end face teeth are meshed and locked. The fixed traction plate is rotated to a proper position, the first compression screw is locked, and the fixed traction plate and the first adjusting rod piece are mutually meshed through end face teeth and locked to realize fixation. And the movable traction plate is rotated to a proper position, the second compression screw is locked, and the movable traction plate and the second adjusting rod piece are mutually meshed through end face teeth and locked to realize fixation.
Preferably, the fixed traction plate and the movable traction plate are in smooth L shapes, the first positioning hole is formed in the transverse wall of the fixed traction plate, the first lower end face tooth is formed in the bottom surface of the vertical wall of the fixed traction plate, the second positioning hole is formed in the transverse wall of the movable traction plate, and the second lower end face tooth is formed in the bottom surface of the vertical wall of the movable traction plate. The structure of aforementioned traction plate can better laminate with the bottom surface of mandible.
Preferably, the number of the guide rods is three, and the guide rods are distributed in a regular triangle shape with the screw as a center. The structure can ensure that the stability of the whole frame is high, and can effectively prevent the deformation and the swing in the coronal direction from influencing the osteogenesis effect during traction.
In a further improvement, the guide rod is provided with scale marks arranged along the axial direction of the guide rod. The guide rod is provided with scale marks, so that the traction progress can be clearly known.
Preferably, a first universal nut capable of swinging is arranged in the first positioning hole, and the first traction screw is a titanium nail with a self-locking function; and a second universal nut capable of swinging is arranged in the second positioning hole, and the second traction screw is a titanium nail with a self-locking function. Draw screw area self-locking function, when squeezing into the mandible with the locking of universal nut, universal nut can swing, can satisfy the screw and become certain angle and squeeze into the mandible, stability when increasing to pull.
The cross section of the driving end is polygonal, a wrench is convenient to drive the screw to rotate, the fixing sleeve is provided with a polygonal hole for the driving end to insert, and the fixing sleeve and the fixed front support are constrained together through a limiting structure and cannot rotate around the axis of the fixing sleeve under the condition that the driving end is inserted into the polygonal hole. After the traction is finished, the fixed sleeve is placed, so that the traction can be prevented from rotating, and the stability after the traction is ensured.
Preferably, the limiting structure comprises a plurality of limiting holes formed in the front fixing bracket and a limiting column arranged on the fixing sleeve and axially extending to be inserted into the limiting holes, and the limiting column is arranged in an inclined manner. Through the cooperation of spacing hole and spacing post for fixed cover can not rotate around self axis, and spacing post slope sets up, and spacing post is certain inclination like this and inserts spacing downthehole, has certain locking effect, places fixed cover roll-off easily.
Preferably, the fixed rear support, the fixed front support and the movable support are all plate-shaped and arranged in parallel at intervals, the rear end of the guide rod is in threaded connection with the fixed rear support, the front end of the guide rod is provided with a threaded column part, the diameter of the threaded column part is smaller than that of the guide rod, and the threaded column part penetrates through the fixed front support and then is locked by the locking nut. The bracket has the advantages of separate assembly.
Compared with the prior art, the utility model has the advantages that: this structure is an external mandible tractor, and the cooperation is fixed a position the operation baffle, and the left and right sides of mandible bottom is squeezed into from external symmetry to the screw that will draw that can be accurate, and the mandible is cut open after the screw is squeezed into again, and the operation is and simple and convenient, great reduction the risk of patient in the art. Because the left side and the right side of the mandible are integrally pulled, the phenomenon of blocking cannot occur, secondary operation is not needed after the traction is finished, the traction screw is directly pulled down, and secondary pain of a patient is avoided.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention 1;
FIG. 2 is a schematic perspective view of an embodiment of the present invention, shown in FIG. 2;
FIG. 3 is an exploded view of an embodiment of the present invention;
FIG. 4 is a perspective view of a plate according to an embodiment of the present invention;
FIG. 5 is a state diagram illustrating the use of the present invention.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
As shown in FIGS. 1 to 5, a first embodiment of the present invention is described.
An external mandible tractor, which comprises
A plurality of guide rods 1 which are arranged in parallel at intervals; the guide rods 1 in this embodiment are three in number and are distributed in a regular triangle shape with a screw 7 described below as a center. The guide rod 1 is provided with scale marks 11 arranged along the axial direction thereof.
The fixed front bracket 2 is fixed at the front end of each guide rod 1;
the fixed rear support 3 is fixed at the rear end of each guide rod 1, the left side and the right side of the fixed rear support 3 are respectively provided with a fixed traction plate 5 which is used for being fixed at the left side bottom and the right side bottom of a mandible 4, and the two fixed traction plates 5 are respectively provided with a first positioning hole 51 for a first traction screw 6a to penetrate through; a first universal nut 17 capable of swinging is arranged in the first positioning hole 51, and the first traction screw 6a is a titanium nail with a self-locking function.
The front end of the screw rod 7 capable of rotating around the axis of the screw rod is supported on the fixed front support 2, the rear end of the screw rod is supported on the fixed rear support 3, and the front end of the screw rod 7 penetrates through the fixed front support 2 to form a driving end 71 in transmission connection with the adjusting handle; the driving end 71 has a polygonal cross section.
The movable support 8 is arranged between the fixed front support 2 and the fixed rear support 3 and sleeved on each guide rod 1 to slide back and forth, a threaded through hole 81 which runs through in the axial direction is formed in the movable support 8, the screw rod 7 penetrates through and is in threaded connection with the threaded through hole 81, the left side and the right side of the movable support 8 are respectively provided with a movable traction plate 9 which is used for being fixed at the bottom of the left side and the bottom of the right side of the mandible 4, and the movable traction plate 9 is provided with a second positioning hole 91 for the second traction screw 6b to penetrate through. A second universal nut 18 capable of swinging is arranged in the second positioning hole 91, and the second traction screw 6b is a titanium nail with a self-locking function.
The fixing sleeve 20 is provided with a polygonal hole 201 for inserting the driving end 71, and under the state that the driving end 71 is inserted into the polygonal hole 201, the fixing sleeve 20 and the fixed front bracket 2 are restrained together through a limiting structure and cannot rotate around the axis of the fixing front bracket. The limiting structure comprises a plurality of limiting holes 21 arranged on the fixed front bracket 2 and a limiting column 202 arranged on the fixed sleeve 20 and axially extending to be inserted into the limiting holes 21, wherein the limiting column 202 is obliquely arranged.
The fixed rear support 3, the fixed front support 2 and the movable support 8 are all plate-shaped and are arranged in parallel at intervals, the rear end of the guide rod 1 is in threaded connection with the fixed rear support 3, a threaded column part 19 is arranged at the front end of the guide rod 1, the diameter of the threaded column part 19 is smaller than that of the guide rod 1, and the threaded column part 19 penetrates through the fixed front support 2 and then is locked through a locking nut 191.
The left side and the right side of the fixed rear support 3 are respectively inserted with a first adjusting rod 10 which can only slide left and right, the first adjusting rod 10 is fixed on the fixed rear support 3 through a first set screw 12, and the fixed traction plate 5 is arranged on the first adjusting rod 10; the left side and the right side of the movable support 8 are respectively inserted with a second adjusting rod 13 which can only slide left and right, the second adjusting rod 13 is fixed on the movable support 8 through a second set screw 14, and the movable traction plate 9 is arranged on the second adjusting rod 13.
A first upper end face tooth 101 is arranged on the top surface of the first adjusting rod 10, a first lower end face tooth 52 which is matched with the first upper end face tooth 101 in a clamping manner is arranged on the bottom surface of the fixed traction plate 5, and a first compression screw 15 penetrates through the fixed traction plate 5 and then is in threaded connection with the top surface of the first adjusting rod 10, so that the first upper end face tooth 101 and the first lower end face tooth 52 are locked in an engaged manner; the top surface of the second adjusting rod 13 is provided with second upper end face teeth 131, the bottom surface of the movable traction plate 9 is provided with second lower end face teeth 92 which are matched with the second upper end face teeth 131 in a clamping manner, and a second compression screw 16 penetrates through the movable traction plate 9 and then is in threaded connection with the top surface of the second adjusting rod 13, so that the second upper end face teeth 131 are meshed with the second lower end face teeth 92 in a locking manner.
Fixed traction plate 5 and activity traction plate 9 all are slick and sly transitive L shape, first locating hole 51 is located on the horizontal wall of fixed traction plate 5, first terminal surface tooth 52 is located on the bottom surface of the vertical wall of fixed traction plate 5, second locating hole 91 is located on the horizontal wall of activity traction plate 9, second terminal surface tooth 92 is located on the bottom surface of the vertical wall of activity traction plate 9.
The structure is an external mandible tractor which is matched with a positioning operation guide plate, as shown in fig. 5, a first traction screw 6a and a second traction screw 6b can be accurately and symmetrically driven into the left side and the right side of the bottom of a mandible 4 from the outside of the body, then the mandible is cut open, and the first traction screw 6a and the second traction screw 6b are respectively positioned on two sides of a cut. During adjustment, the wrench is inserted into the driving end 71, the wrench is rotated to drive the screw 7 to rotate, the traction distance of each rotation of the screw 7 is 0.4mm, a gap is generated, the traction force is utilized to induce the osteogenesis capacity of the jaw bone to continuously form new bones to fill the gap, the traction distance can be accurately and slowly adjusted through the screw transmission of the screw 7 and the threaded through hole 81, and traction is stopped after a clinical expected effect is achieved. After traction is finished, the fixing sleeve 20 is placed, the limiting column 202 on the fixing sleeve 20 is inserted into the limiting hole 21 on the front support 2, the fixing sleeve 20 and the fixed front support 2 are constrained together and cannot rotate around the axis of the fixing sleeve, the screw 7 can be prevented from being dragged to rotate around, and the stability after traction is guaranteed. Because of pulling the left and right sides of the mandible integratively, the phenomenon of blocking can not appear, do not need the secondary operation after pulling the completion at last, directly drop first traction screw 6a, second traction screw 6b can, avoid patient's secondary misery.
It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "up, down", "clockwise and counterclockwise" and the like indicate the orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An external mandible tractor which is characterized in that: comprises that
A plurality of guide rods (1) which are arranged in parallel at intervals;
the fixed front bracket (2) is fixed at the front end of each guide rod (1);
the fixed rear support (3) is fixed at the rear end of each guide rod (1), the left side and the right side of the fixed rear support (3) are respectively provided with a fixed traction plate (5) which is used for being fixed at the left side bottom and the right side bottom of the mandible (4), and the two fixed traction plates (5) are respectively provided with a first positioning hole (51) for a first traction screw (6a) to penetrate through;
the front end of the screw rod (7) can rotate around the axis of the screw rod, the front end of the screw rod is supported on the fixed front support (2), the rear end of the screw rod is supported on the fixed rear support (3), and the front end of the screw rod (7) penetrates through the fixed front support (2) to form a driving end (71) in transmission connection with the adjusting handle;
activity support (8), locate between fixed fore-stock (2) and fixed after-poppet (3) and the suit on each guide arm (1) and can slide around, open screw thread through-hole (81) that have the axial to run through on activity support (8), screw rod (7) pass and threaded connection in screw thread through-hole (81), the both sides are equipped with respectively about activity support (8) and are used for fixing movable traction plate (9) of jaw (4) left side bottom and right side bottom down, all open on movable traction plate (9) and supply the second to pull second locating hole (91) that screw (6b) were worn to establish.
2. The external mandible retractor of claim 1 wherein: the left side and the right side of the fixed rear support (3) are respectively inserted with a first adjusting rod piece (10) which can only slide left and right, the first adjusting rod pieces (10) are fixed on the fixed rear support (3) through first set screws (12), and the fixed traction plate (5) is installed on the first adjusting rod pieces (10); the left side and the right side of the movable support (8) are respectively inserted with a second adjusting rod piece (13) which can only slide left and right, the second adjusting rod piece (13) is fixed on the movable support (8) through a second set screw (14), and the movable traction plate (9) is installed on the second adjusting rod piece (13).
3. The external mandible retractor of claim 2 wherein: a first upper end face tooth (101) is arranged on the top surface of the first adjusting rod piece (10), a first lower end face tooth (52) which is matched with the first upper end face tooth (101) in a clamping manner is arranged on the bottom surface of the fixed traction plate (5), and the fixed traction plate (5) is connected with the first adjusting rod piece (10) in a locking manner through a first compression screw (15), so that the first upper end face tooth (101) is meshed with and locked with the first lower end face tooth (52); and second upper end face teeth (131) are arranged on the top surface of the second adjusting rod piece (13), second lower end face teeth (92) which are matched with the second upper end face teeth (131) in a clamping manner are arranged on the bottom surface of the movable traction plate (9), and the movable traction plate (9) is locked and connected with the second adjusting rod piece (13) through a second compression screw (16), so that the second upper end face teeth (131) are meshed and locked with the second lower end face teeth (92).
4. The external mandible retractor of claim 3 wherein: fixed traction plate (5) and activity traction plate (9) all are rounding off's L shape, first locating hole (51) are located on the horizontal wall of fixed traction plate (5), first terminal surface tooth (52) are located on the bottom surface of the vertical wall of fixed traction plate (5), second locating hole (91) are located on the horizontal wall of activity traction plate (9), second terminal surface tooth (92) are located on the bottom surface of the vertical wall of activity traction plate (9).
5. The external mandible retractor of claim 1 wherein: the number of the guide rods (1) is three, and the guide rods are distributed in a regular triangle shape by taking the screw rod (7) as the center.
6. The external mandible retractor of claim 1 wherein: the guide rod (1) is provided with scale marks (11) arranged along the axial direction of the guide rod.
7. The external mandible retractor of claim 1 wherein: a first universal nut (17) capable of swinging is arranged in the first positioning hole (51), and the first traction screw (6a) is a titanium nail with a self-locking function; a second universal nut (18) capable of swinging is arranged in the second positioning hole (91), and the second traction screw (6b) is a titanium nail with a self-locking function.
8. The external mandible retractor of claim 1 wherein: the cross section of the driving end (71) is polygonal, the fixing sleeve (20) is further included, a polygonal hole (201) into which the driving end (71) is inserted is formed in the fixing sleeve (20), and under the condition that the driving end (71) is inserted into the polygonal hole (201), the fixing sleeve (20) and the fixed front support (2) are restrained together through a limiting structure and cannot rotate around the axis of the fixing front support.
9. The external mandible retractor of claim 8 wherein: the limiting structure comprises a plurality of limiting holes (21) formed in the fixed front support (2) and limiting columns (202) arranged on the fixed sleeve (20) and axially extending to be inserted into the limiting holes (21), and the limiting columns (202) are obliquely arranged.
10. The external mandible retractor of claim 1 wherein: the fixed rear support (3), the fixed front support (2) and the movable support (8) are all plate-shaped and are arranged in parallel at intervals, the rear end of the guide rod (1) is in threaded connection with the fixed rear support (3), the front end of the guide rod (1) is provided with a thread column part (19), the diameter of the thread column part (19) is smaller than that of the guide rod (1), and the thread column part (19) penetrates through the fixed front support (2) and then is locked through a locking nut (191).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023245622.0U CN215688351U (en) | 2020-12-29 | 2020-12-29 | External mandible tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023245622.0U CN215688351U (en) | 2020-12-29 | 2020-12-29 | External mandible tractor |
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| Publication Number | Publication Date |
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| CN215688351U true CN215688351U (en) | 2022-02-01 |
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| CN202023245622.0U Active CN215688351U (en) | 2020-12-29 | 2020-12-29 | External mandible tractor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112971958A (en) * | 2020-12-29 | 2021-06-18 | 宁波慈北医疗器械有限公司 | External mandible tractor |
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2020
- 2020-12-29 CN CN202023245622.0U patent/CN215688351U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112971958A (en) * | 2020-12-29 | 2021-06-18 | 宁波慈北医疗器械有限公司 | External mandible tractor |
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