CN213489211U - Built-in mandible lifting traction fixing system - Google Patents
Built-in mandible lifting traction fixing system Download PDFInfo
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- CN213489211U CN213489211U CN202021400157.0U CN202021400157U CN213489211U CN 213489211 U CN213489211 U CN 213489211U CN 202021400157 U CN202021400157 U CN 202021400157U CN 213489211 U CN213489211 U CN 213489211U
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Abstract
The utility model provides a built-in mandible lifting traction fixing system, which comprises a first fixing part, a second fixing part and a transmission component, wherein the first fixing part is provided with a first wing piece and a sleeve connected with the first wing piece, the second fixing part is provided with a second wing piece and a sleeve rod connected with the second wing piece, and the first wing piece and the second wing piece are both provided with fixing holes; the loop bar of the second fixing part is telescopically sleeved in the sleeve of the first fixing part; the transmission assembly is arranged in the sleeve and comprises a rotating shaft, a screw rod, a driving gear and a driven gear, the axial direction of the screw rod is the same as the extension and retraction of the sleeve rod and is configured to only circumferentially rotate but not axially float, and the screw rod is in screwed connection with the sleeve rod of the second fixing part; the driven gear is fixedly sleeved on the screw rod, and the driving gear is meshed with the driven gear; the first end of the rotating shaft is fixedly connected with the driving gear, and the second end of the rotating shaft extends out of the sleeve to form a connecting end. A good built-in arrangement can be formed.
Description
Technical Field
The utility model relates to the field of medical equipment, concretely relates to built-in mandible rises and props up traction fixation system.
Background
The elevated mandible and short body, temporomandibular joint hypoplasia and even the absence caused by mandibular hypoplasia are the most important factors for facial asymmetry. Distraction osteogenesis has been widely used in the treatment of asymmetric facial deformities in patients with hemifacial short deformities (HFMs) since McCarthy, et al, 1992, first succeeded in applying distraction to extend the mandible. The principle of the distraction osteogenesis comprises: after the bone is cut, a special traction device is used for slowly drawing, so that new bone is formed in the osteotomy gap, and the aim of prolonging the jaw bone is fulfilled.
At present, some mandible extenders are mainly divided into two types, external type and internal type. The external mandible tractor has the following implementation mode: two groups of kirschner wires or screws (at least two in each group) are arranged on the cheek side of the face through the skin, a spiral structure is arranged between the two groups of kirschner wires or screws, and then the screw rods are rotated to drive the kirschner wires or screws to move in the opposite direction. The technical method has the following defects: firstly, because the Kirschner wire or the screw is fixed in the jaw bone, the Kirschner wire or the screw drives the broken end of the jaw bone to displace when moving, so that the bone is not healed or has osteogenesis deformity; secondly, the kirschner wires need to penetrate through the skin, scars can be left on the skin of the face, the infection probability is high due to the fact that the kirschner wires or screws are exposed, and the external device is easy to be accidentally collided, so that the kirschner wires are bent and even fall off, and normal life of a patient is affected; the two groups of four nails are required to be arranged in parallel, otherwise, the screw device is difficult to be arranged, and the operation difficulty is high; and fourthly, the external jaw bone tractor has the risk of stressed deformation of the expanding Kirschner wire or the screw due to the 2cm moment between the screw rod and the broken end of the bone.
The other tractor is built-in, the fixed plate is tightly attached to the jaw bone, the displacement and deformation of the screw are avoided, the distraction distance of the tractor is close to the displacement distance of the broken end of the jaw bone to the maximum extent, and the horizontal wing hexagonal prism structure of the base has stronger bending strength and ensures that the distraction direction of the jaw bone is not changed; when the tractor is used for traction of a mandibular ascending position, a part connected with the screw rod needs to be left outside the body through a skin incision, and the tractor has the following defects: the external device is easy to be collided accidentally, which causes the tractor to loosen and shift, influences the normal life of the patient and influences the psychological aspects.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a built-in mandible lifting traction fixing system based on a built-in structure, so as to solve the problems.
The utility model provides a technical scheme as follows:
a built-in mandibular lifting traction fixing system comprises a first fixing part, a second fixing part and a transmission component, wherein the first fixing part is provided with a first wing piece and a sleeve connected with the first wing piece, the second fixing part is provided with a second wing piece and a sleeve rod connected with the second wing piece, and the first wing piece and the second wing piece are both provided with fixing holes; the loop bar of the second fixing part is telescopically sleeved in the sleeve of the first fixing part; the transmission assembly is arranged in the sleeve and comprises a rotating shaft, a screw rod, a driving gear and a driven gear, the axial direction of the screw rod is the same as the extension and retraction of the sleeve rod and is configured to be only circumferentially rotatable but not axially movable, and the screw rod is in screwed connection with the sleeve rod of the second fixed part; the driven gear is fixedly sleeved on the screw rod, and the driving gear is meshed with the driven gear; the first end of the rotating shaft is fixedly connected with the driving gear, and the second end of the rotating shaft extends out of the sleeve to form a connecting end.
Furthermore, the sleeve is provided with a hollow shaft hole, a limiting convex part extends inwards from the middle position of the hollow shaft hole, and the hollow shaft hole is further divided into a middle shaft hole section formed by enclosing the limiting convex part and a first shaft hole section and a second shaft hole section which are respectively positioned at two sides of the limiting convex part; the sleeve rod is telescopically sleeved in the second shaft hole section, and the screw rod sequentially penetrates through the first shaft hole section, the middle shaft hole section and the second shaft hole section and is in screwed connection with the sleeve rod; the driven gear is located in the first shaft hole section and abutted against the limiting convex part, the end cover is covered on a port of the sleeve close to the first shaft hole section, and the screw is abutted against the end cover to realize that the screw is configured to only circumferentially rotate but not axially float.
Furthermore, the sleeve is further provided with an installation shaft hole which is perpendicular to the hollow shaft hole and communicated with the first shaft hole section, and the rotating shaft is rotatably assembled in the installation shaft hole.
Furthermore, the rotating shaft device further comprises an extension rod, wherein the first end of the extension rod is connected with the second end of the rotating shaft and is fixed with the rotating shaft at least in the circumferential direction.
Furthermore, the first end of extension rod articulates on the second end of pivot, and then can swing along the radial direction of pivot.
Furthermore, a U-shaped groove is formed in the second end of the rotating shaft, a connecting block is inserted into the U-shaped groove, and corresponding bolt holes are formed in the groove wall of the U-shaped groove and the connecting block and are connected through inserting of bolt pieces; the first end of extension rod articulates on the connecting block.
Furthermore, still include the regulation pole, adjust the pole detachable and be fixed in the second end of extension rod.
Furthermore, a circumferential limiting structure is arranged between the loop bar of the second fixing part and the sleeve of the first fixing part.
Further, the axle hole section that the cover barrel cup jointed the loop bar is square axle hole section, the loop bar is the square loop bar with square axle hole section adaptation.
Through the utility model provides a technical scheme has following beneficial effect:
during the operation, be fixed in two pieces of jaw respectively with the first fin of first fixed part and the second fin of second fixed part, then drive first fixed part and second fixed part relative movement through rotatory pivot, and then change the distance of first fin and second fin, realize pulling. Meanwhile, the transmission assembly is arranged in the sleeve of the first fixing part, so that the transmission assembly can be well kept in the oral cavity, the scar left on the facial skin of the patient is avoided, and the satisfaction degree of the patient is improved; and the looseness and displacement of the tractor caused by accidental collision are reduced.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a built-in mandible lifting and traction fixing system;
FIG. 2 is a schematic diagram of the internal structure of the built-in mandible lifting and traction fixing system in the embodiment;
FIG. 3 is a first schematic view of an embodiment of an internal mandibular advancement, distraction fixation system;
fig. 4 is a schematic diagram of the application of the built-in mandible lifting and traction fixing system in the embodiment II.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 and 2, the present embodiment provides a built-in mandibular lifting and distraction fixation system, including a first fixation part, a second fixation part and a transmission assembly, the first fixation part has a first wing 12 and a sleeve 11 connected to the first wing 12, the second fixation part has a second wing 22 and a sleeve 21 connected to the second wing 22, the first wing 12 and the second wing 22 are both provided with fixation holes (a fixation hole 121 of the first wing 12 and a fixation hole 221 of the second wing 22); specifically, in the embodiment, the first wing 12 is provided with three fixing holes 121, and the three fixing holes 121 are distributed in a form of a gamma; the second wing 22 is provided with four fixing holes 221, and the four fixing holes 221 are distributed in a T shape. Of course, the number and distribution of the fixation holes is not limited thereto in other embodiments.
The loop bar 21 of the second fixing part is telescopically sleeved in the sleeve 11 of the first fixing part; the transmission assembly is arranged in the sleeve 11 and comprises a rotating shaft 34, a screw rod 31, a driving gear 33 and a driven gear 32, the axial direction of the screw rod 31 is the same as the extension and contraction of the sleeve rod 21 and is configured to be only circumferentially rotatable but not axially movable, and the screw rod 31 is rotatably connected with the sleeve rod 21 of the second fixed part; the driven gear 32 is fixedly sleeved on the screw rod 31, and the driving gear 33 is meshed with the driven gear 32; the first end of the rotating shaft 34 is fixedly connected to the driving gear 33, and the second end thereof extends out of the sleeve 11 to form a connecting end.
During operation, the first wing piece of the first fixing part and the second wing piece of the second fixing part are respectively fixed on two jawbones, the specific mode is that the first wing piece and the second wing piece are internally arranged and respectively attached to the two jawbones, and then a kirschner wire or a screw passes through the fixing hole to be fixed, so that the fixation is realized, as shown in fig. 3, wherein the structure of the kirschner wire or the screw is omitted in fig. 3. The wing pieces are closely attached to the jaw bone, so that the displacement and deformation of the Kirschner wire or the screw are avoided, and the distraction distance is close to the displacement distance of the broken end of the jaw bone to the maximum extent.
Then the rotating shaft 34 is rotated, the rotation of the rotating shaft 34 drives the driving gear 33 to rotate, the rotation of the driving gear 33 drives the driven gear 32 to rotate, and further drives the screw 31 to rotate, the rotation of the screw 31 drives the first fixing part and the second fixing part to move relatively, and further the distance between the first wing piece 12 and the second wing piece 22 is changed, so that the two jawbones are expanded or pressurized, and traction is realized. As shown in fig. 4, the first and second wings 12, 22 are driven away from each other to expand. Meanwhile, the transmission assembly is arranged in the sleeve 11 of the first fixing part, so that the transmission assembly can be well kept in the oral cavity, the scar left on the facial skin of a patient is avoided, and the satisfaction degree of the patient is improved; and the looseness and displacement of the tractor caused by accidental collision are reduced.
Further, in this embodiment, a preferable assembling manner of the screw 31 is: the sleeve 11 is provided with a hollow shaft hole 111, a limiting convex part 112 extends inwards from the middle position of the hollow shaft hole 111, and then the hollow shaft hole 111 is divided into a middle shaft hole section (not marked) surrounded by the limiting convex part, and a first shaft hole section (not marked) and a second shaft hole section (not marked) which are respectively positioned at two sides of the limiting convex part; the loop bar 21 is telescopically sleeved in the second shaft hole section, and the screw rod 31 sequentially penetrates through the first shaft hole section, the middle shaft hole section and the second shaft hole section and is rotatably connected with the loop bar 21; the driven gear 32 is located in the first shaft hole section and abuts against the limit convex part 112, the sleeve 11 is covered with an end cover 13 at a port close to the first shaft hole section, and the screw 31 abuts against the end cover 13 to realize that the driven gear is configured to only circumferentially rotate but not axially float. The structure assembly is simple and easy to realize. Meanwhile, when the screw needs to be detached, the end cover 13 is opened firstly, and then the screw 31 is pulled out, so that the operation is simple and convenient. Of course, in other embodiments, the assembly structure of the screw 31 is not limited thereto.
Furthermore, in this embodiment, the sleeve 11 is further provided with an installation shaft hole 113 perpendicular to the hollow shaft hole 111 and communicating with the first shaft hole section, the rotating shaft 34 is rotatably assembled in the installation shaft hole 113, and the rotating shaft 34 is perpendicular to the telescopic direction of the loop bar 21, so that the operation is more convenient. Of course, in other embodiments, the orientation of the rotating shaft 34 can be adjusted according to actual requirements. More specifically, the transmission setting of the driving gear 33 and the driven gear 32 can be adjusted according to the actual positions of the rotating shaft 34 and the screw 31, as long as the rotation of the rotating shaft 34 can synchronously drive the screw 31 to rotate.
Further, in this embodiment, the device further includes an extension rod 40, a first end of the extension rod 40 is connected to a second end of the rotating shaft 34, and is fixed to the rotating shaft 34 at least in the circumferential direction, so as to achieve synchronous rotation. During the fixing period of the retractor, the extension rod 40 is sewn together with the first fixing part and the second fixing part to form a built-in structure, the length of the rotating shaft 34 can be lengthened by the extension rod 40, the extension rod 40 is arranged at a position easy to operate, such as a position close to the outer side of the oral cavity, and when adjustment operation is needed subsequently, the extension rod 40 can be rotated only by finding the position close to the outer side of the oral cavity, so that adjustment is realized; easy to find and convenient to operate. Of course, in other embodiments, the extension bar 40 may not be required to be configured.
Specifically, the first end of the extension rod 40 is hinged to the second end of the rotating shaft 34, so as to be capable of swinging along the radial direction of the rotating shaft 34. So set up for the extension rod 40 can adjust the position to a certain extent, is convenient for adjust to the position of preferred when sewing up.
More specifically, in this embodiment, the adjustable structure of the extension rod 40 is: a U-shaped groove (not shown) is formed at the second end of the rotating shaft 34, a connecting block 41 is inserted into the U-shaped groove, corresponding bolt holes (not shown) are formed in the groove wall of the U-shaped groove and the connecting block 41, and the pin holes are inserted and connected through a bolt piece 42 to realize fixed connection; the first end of the extension rod 40 is hinged to the connecting block 41, so that the extension rod 40 is hinged to the rotating shaft 34. So set up, when assembling, can articulate extension rod 40 on connecting block 41 earlier, then assemble connecting block 41 on the second end of pivot 34 again, be convenient for assemble. Of course, in other embodiments, the structure of the hinge arrangement of the extension rod 40 and the rotation shaft 34 is not limited to this.
Further, in this embodiment, the extension rod further includes an adjusting rod 50, and the adjusting rod 50 is detachably fixed to the second end of the extension rod 40. Through this fixed connection who adjusts pole 50 and extension rod 40, the doctor of being convenient for is handed the operation, adjusts the dismantlement of pole 50 and extension rod 40 and is connected for accomplish the regulation back, adjust the removable storage of pole 50. Of course, in other embodiments, the adjustment lever 50 may not be required.
Further, in this embodiment, a circumferential limiting structure is disposed between the sleeve rod 21 of the second fixing portion and the sleeve 11 of the first fixing portion. So that the sleeve rod 21 and the sleeve 11 do not produce circumferential deviation, and the jaw bone stretching device has a strong anti-rotation function and ensures that the jaw bone stretching direction is unchanged.
Specifically, a shaft hole section (i.e., a second shaft hole section) of the sleeve 11 sleeved with the sleeve rod 21 is a square shaft hole section, and the sleeve rod 21 is a square sleeve rod matched with the square shaft hole section; the square sleeve rod is sleeved in the square shaft hole section to realize circumferential limiting, so that circumferential offset is prevented; simple structure and easy realization. Of course, in other embodiments, other structures such as a triangular shaft hole section and a triangular loop bar, etc. having circumferential limit may be substituted.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A built-in mandibular advancement traction fixing system is characterized in that: the first fixing part is provided with a first wing piece and a sleeve connected with the first wing piece, the second fixing part is provided with a second wing piece and a sleeve rod connected with the second wing piece, and the first wing piece and the second wing piece are both provided with fixing holes; the loop bar of the second fixing part is telescopically sleeved in the sleeve of the first fixing part; the transmission assembly is arranged in the sleeve and comprises a rotating shaft, a screw rod, a driving gear and a driven gear, the axial direction of the screw rod is the same as the extension and retraction of the sleeve rod and is configured to be only circumferentially rotatable but not axially movable, and the screw rod is in screwed connection with the sleeve rod of the second fixed part; the driven gear is fixedly sleeved on the screw rod, and the driving gear is meshed with the driven gear; the first end of the rotating shaft is fixedly connected with the driving gear, and the second end of the rotating shaft extends out of the sleeve to form a connecting end.
2. The built-in mandibular advancement traction fixation system of claim 1, wherein: the sleeve is provided with a hollow shaft hole, a limiting convex part extends inwards from the middle position of the hollow shaft hole, and the hollow shaft hole is further divided into a middle shaft hole section formed by enclosing the limiting convex part and a first shaft hole section and a second shaft hole section which are respectively positioned at two sides of the limiting convex part; the sleeve rod is telescopically sleeved in the second shaft hole section, and the screw rod sequentially penetrates through the first shaft hole section, the middle shaft hole section and the second shaft hole section and is in screwed connection with the sleeve rod; the driven gear is located in the first shaft hole section and abutted against the limiting convex part, the end cover is covered on a port of the sleeve close to the first shaft hole section, and the screw is abutted against the end cover to realize that the screw is configured to only circumferentially rotate but not axially float.
3. The built-in mandibular advancement traction fixation system of claim 2, wherein: the sleeve is further provided with an installation shaft hole which is perpendicular to the hollow shaft hole and communicated with the first shaft hole section, and the rotating shaft is rotatably assembled in the installation shaft hole.
4. The built-in mandibular advancement traction fixation system of claim 1, wherein: still include an extension rod, the first end of extension rod is connected the second end of pivot, and at least fix mutually with the pivot in circumferential direction.
5. The built-in mandibular advancement traction fixation system of claim 4, wherein: the first end of extension rod articulates on the second end of pivot, and then can swing along the radial direction of pivot.
6. The built-in mandibular advancement traction fixation system of claim 5, wherein: the second end of the rotating shaft is provided with a U-shaped groove, a connecting block is inserted into the U-shaped groove, and corresponding bolt holes are formed in the groove wall of the U-shaped groove and the connecting block and are connected through inserting of a bolt piece; the first end of extension rod articulates on the connecting block.
7. The built-in mandibular advancement traction fixation system of claim 4, wherein: still include the regulation pole, adjust the pole detachable and be fixed in the second end of extension rod.
8. The built-in mandibular advancement traction fixation system of claim 1, wherein: and a circumferential limiting structure is arranged between the loop bar of the second fixing part and the sleeve of the first fixing part.
9. The built-in mandibular advancement traction fixation system of claim 8, wherein: the axle hole section that the cover cylinder cup jointed the loop bar is square shaft hole section, the loop bar is the square loop bar with square shaft hole section adaptation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021400157.0U CN213489211U (en) | 2020-07-16 | 2020-07-16 | Built-in mandible lifting traction fixing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021400157.0U CN213489211U (en) | 2020-07-16 | 2020-07-16 | Built-in mandible lifting traction fixing system |
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| Publication Number | Publication Date |
|---|---|
| CN213489211U true CN213489211U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021400157.0U Active CN213489211U (en) | 2020-07-16 | 2020-07-16 | Built-in mandible lifting traction fixing system |
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|---|---|
| CN (1) | CN213489211U (en) |
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- 2020-07-16 CN CN202021400157.0U patent/CN213489211U/en active Active
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