A new type of head external support for maxillofacial bone traction

Abstract

This invention discloses a novel external cranial support for maxillofacial bone traction, comprising: two lateral fixation members, each fixed to the temporal region above the ear on both sides of the skull by three first screws; a cranial top fixation member, fixed to the cranial top by two second screws; two angle rulers, each fixed to one of the lateral fixation members, with a sliding member on the side of each angle ruler and a telescopic member on the angle ruler, one end of which is coaxially fixed to the angle ruler and the lateral fixation member, and the middle of which is fixed to the sliding member; and a solid metal rod, each end of which passes through the other end of the two telescopic members, with two pulling members on the solid metal rod, the other ends of which are connected to the facial bones. This invention achieves more reliable fixation while significantly reducing costs.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a novel external cranial support for maxillofacial bone traction. Background Technology

[0002] Congenital cleft lip and palate is characterized by midfacial retraction, a common dentofacial deformity after cleft lip and palate surgery and a crucial aspect of sequential treatment. It manifests as overall midfacial retraction (perinasal, infraorbital, zygomatic, and maxillary regions). As the patient grows and develops, the deformity worsens, potentially leading to speech and masticatory dysfunction, and even severe psychological problems. Currently, the only effective treatment for this deformity is the external cranial suture distraction technique. This technique relies entirely on the external cranial suture, which is worn for an extended period, typically six months to a year. The current clinically used external cranial stent has significant drawbacks: 1) The stent requires 10 screws arranged side by side in the skull for fixation. Too many screws result in noticeable postoperative scarring, affecting aesthetics; 2) Even with 10 screws for fixation, there is still a risk of stent displacement after surgery, which may require a second surgery for repositioning or daily screw tightening to increase fixation; 3) The vertical bar located in the middle of the patient's face interferes with the patient's vision. Due to the long wearing period, patients often need to participate in normal social life, posing a serious safety hazard; 4) Changes in the traction angle or direction after surgery are not easily detected and are uncertain. Summary of the Invention

[0003] The purpose of this invention is to provide a novel external cranial support for maxillofacial bone traction, in order to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a novel extracranial support for maxillofacial bone traction, comprising:

[0005] The fixing part includes two side fixing members. The two side fixing members are respectively fixed to the temporal region above the ear on both sides of the head by three first screws. The top of the two side fixing members is provided with a cranial top fixing member, which is fixed to the cranial top by two second screws.

[0006] The adjustment part includes two angle gauges, which are respectively fixed to the two side fixing members. A sliding member is provided on the side of each angle gauge, and a telescopic member is provided on each angle gauge. One end of the telescopic member is coaxially fixed to the angle gauge and the side fixing member, and the middle part of the telescopic member is fixed to the sliding member.

[0007] The correction unit includes a solid metal rod, with both ends of the solid metal rod passing through the other ends of the two telescopic members respectively. Two pulling members are provided on the solid metal rod, and the other ends of the two pulling members are connected to the facial bones.

[0008] Preferably, the side fixing member includes a side arc-shaped plate, which is configured as a semi-circular structure. The two ends of the side arc-shaped plate are respectively fixed with fixing plates. The two fixing plates are located on the same straight line and are parallel to the orbital plane. The top of the side arc-shaped plate and the two fixing plates are respectively fixed to the temporal region of the upper ear on both sides of the skull by a first screw. The two ends of the side side of the side arc-shaped plate are respectively provided with a first through hole and a second through hole, and the top of the side side of the side arc-shaped plate is provided with a third through hole.

[0009] Preferably, the cranial fixation component includes two upper arc-shaped plates, which are connected by an extension assembly. The two upper arc-shaped plates are respectively fixed to the cranial top by the second screw. A connecting hole is provided at the bottom of the upper arc-shaped plate, and the connecting hole is fixed to the third through hole by a bolt and nut.

[0010] Preferably, the extension assembly includes a connecting rod, and extension grooves are respectively opened on the end faces of the two upper arc plates. The two ends of the connecting rod are respectively in sliding contact with the inner walls of the two extension grooves. Two limiting blocks are respectively fixed to the outer walls of the two ends of the connecting rod. A limiting groove adapted to the limiting blocks is opened on the inner wall of the extension groove.

[0011] Preferably, the angle ruler includes a positioning plate, with a fourth through hole and a fifth through hole respectively at both ends of the positioning plate. A protractor is fixed to the bottom surface of the positioning plate near the fifth through hole. The protractor is configured as an arc-shaped structure, with angle scales engraved on it and an arc-shaped hole.

[0012] Preferably, the telescopic component includes a telescopic plate, one end of which has a telescopic groove, and one end of a telescopic rod is slidably contacted within the telescopic groove. A threaded hole is provided on the side of the telescopic plate, and a positioning bolt is threaded into the threaded hole. The end face of the positioning bolt abuts against the side wall of the telescopic rod. A sixth through hole is provided on the other side wall of the telescopic plate, and a seventh through hole is provided in the middle of the telescopic plate. The first, fourth, and sixth through holes are fixed by bolts and nuts. The fifth and second through holes are fixed by bolts and nuts. The seventh through hole is positioned corresponding to the arc-shaped hole and is fixed to the arc-shaped hole by bolts and nuts.

[0013] Preferably, the two ends of the solid metal rod extend through the other ends of the two telescopic rods, and the solid metal rod is configured as a hexagonal structure.

[0014] Preferably, the pulling element includes a metal hook that hooks onto the facial bone, one end of the metal hook is fixedly connected to a spring, the other end of the spring is fixedly connected to one end of a limiting rod, and the other end of the limiting rod is sleeved on the solid metal rod.

[0015] This invention discloses the following technical advantages: It requires only 8 screws for fixation, resulting in more reliable fixation and reduced device cost. The traction angle is visualized and precise, facilitating accurate postoperative adjustments. The invention eliminates the vertical bar in the center of the traditional support surface, avoiding visual interference and enhancing safety. The overall support is smaller and lighter, minimizing disruption to daily life and making it more suitable for long-term wear. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a novel external cranial support for maxillofacial bone traction according to the present invention.

[0018] Figure 2 for Figure 1 A magnified view of a portion of A1;

[0019] Figure 3 This is a schematic diagram of the side fixing member in this invention;

[0020] Figure 4 This is a schematic diagram of the telescopic component in this invention;

[0021] Figure 5 This is a schematic diagram of the angle ruler in this invention;

[0022] Figure 6 This is a schematic diagram of the skull fixation component in this invention;

[0023] Among them, 1. First screw; 2. Second screw; 3. Solid metal rod; 4. Side arc plate; 5. Fixing plate; 6. First through hole; 7. Second through hole; 8. Third through hole; 9. Upper arc plate; 10. Connecting hole; 11. Connecting rod; 12. Limiting block; 13. Positioning plate; 14. Fourth through hole; 15. Fifth through hole; 16. Protractor; 17. Arc hole; 18. Telescopic plate; 19. Telescopic rod; 20. Sixth through hole; 21. Seventh through hole; 22. Metal hook; 23. Spring; 24. Limiting rod; 25. Sleeve; 26. Fixing bolt. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1-6 This invention provides a novel extracranial support for maxillofacial bone traction, comprising:

[0027] The fixing part includes two fixing members on both sides. The two fixing members are respectively fixed to the temporal region above the ear on both sides of the head by three first screws 1. A cranial fixing member is provided at the top of the two fixing members. The cranial fixing member is fixed to the cranial top by two second screws 2.

[0028] The adjustment part includes two angle gauges, which are fixedly connected to the fixing parts on both sides respectively. A sliding part is provided on the side of the angle gauge, and a telescopic part is provided on the angle gauge. One end of the telescopic part is fixedly connected to the angle gauge and the side fixing parts coaxially, and the middle part of the telescopic part is fixedly connected to the sliding part.

[0029] The correction unit includes a solid metal rod 3, with both ends of the solid metal rod 3 passing through the other ends of two telescopic members. Two pulling members are provided on the solid metal rod 3, and the other ends of the two pulling members are connected to the facial bones.

[0030] This invention requires only 8 screws for fixation, resulting in more reliable fixation and reduced device cost. The traction angle is visualized and precise, facilitating accurate postoperative adjustments. This invention eliminates the vertical bar in the center of the traditional support surface, avoiding visual interference and enhancing safety. The overall support is smaller and lighter, minimizing disruption to daily life and making it more suitable for long-term wear.

[0031] The invention is made entirely of aluminum alloy, which can improve strength while significantly reducing weight and reducing the burden on patients.

[0032] The positions of the contralateral fixation member and the cranial fixation member are achieved by the first screw 1 and the second screw 2, so that they can be fixed to the patient's head, thereby fixing the adjustment part and the correction part. The adjustment part can adjust the angle of the correction part to enhance adaptability. The pull part is displaced on the solid metal rod 3 to correct the shape and position of the facial bones. The correction part and the adjustment part work together to achieve multi-angle adjustment and improve adaptability.

[0033] Further optimization of the scheme: the side fixing component includes a side arc plate 4, which is set as a semi-circular structure. Fixing plates 5 are fixed to both ends of the side arc plate 4. The two fixing plates 5 are located on the same straight line and are parallel to the orbital auricular plane. The top of the side arc plate 4 and the two fixing plates 5 are fixed to the temporal region of the upper ear on both sides of the skull by a first screw 1. The two ends of the side of the side arc plate 4 are respectively provided with a first through hole 6 and a second through hole 7. The top of the side of the side arc plate 4 is provided with a third through hole 8.

[0034] The side arc plate 4 is fixed to the temporal region above the ear on both sides of the patient's head by the first screw 1.

[0035] The design is further optimized. The cranial fixation component includes two upper arc-shaped plates 9, which are connected by an extension assembly. The two upper arc-shaped plates 9 are respectively fixed to the cranial top by a second screw 2. A connecting hole 10 is provided at the bottom of the upper arc-shaped plate 9, and the connecting hole 10 is fixed to the third through hole 8 by bolts and nuts.

[0036] The upper arc-shaped plate 9 is fixed to the top of the patient's skull by the second screw 2.

[0037] The third through hole 8 can also be opened on the top surface of the side arc plate 4, and the connecting hole 10 can be opened on the bottom surface of the end of the upper arc plate 9. The connecting hole 10 and the third through hole 8 are then fixed together by bolts.

[0038] Further optimization of the scheme: the extension component includes a connecting rod 11, and extension grooves are respectively opened on the end faces of the two upper arc plates 9. The two ends of the connecting rod 11 slide in contact with the inner walls of the two extension grooves respectively. Two limiting blocks 12 are respectively fixed to the outer walls of the two ends of the connecting rod 11. Limiting grooves that are adapted to the limiting blocks 12 are opened on the inner walls of the extension grooves.

[0039] The extended components allow for spacing adjustment between the two upper arc-shaped plates 9, enabling adaptive fixation for different patients' heads.

[0040] The design is further optimized. The angle ruler includes a positioning plate 13. The two ends of the positioning plate 13 are respectively provided with a fourth through hole 14 and a fifth through hole 15. A protractor 16 is fixed to the bottom surface of the positioning plate 13 near the fifth through hole 15. The protractor 16 is set as an arc-shaped structure. An angle scale is engraved on the protractor 16. An arc-shaped hole 17 is provided on the protractor 16.

[0041] The angle of the telescopic component can be adjusted by tightening or loosening the bolts and nuts, and the protractor 16 can be used to correct the angle.

[0042] The design is further optimized. The telescopic component includes a telescopic plate 18. One end of the telescopic plate 18 has a telescopic groove, in which one end of the telescopic rod 19 slides. The side of the telescopic plate 18 has a threaded hole, in which a positioning bolt is threadedly connected. The end face of the positioning bolt abuts against the side wall of the telescopic rod 19. The other side wall of the telescopic plate 18 has a sixth through hole 20, and the middle of the telescopic plate 18 has a seventh through hole 21. The first through hole 6, the fourth through hole 14, and the sixth through hole 20 are fixed by bolts and nuts. The fifth through hole 15 and the second through hole 7 are fixed by bolts and nuts. The seventh through hole 21 is positioned corresponding to the arc-shaped hole 17, and the seventh through hole 21 and the arc-shaped hole 17 are fixed by bolts and nuts.

[0043] The telescopic component allows for auxiliary adjustment of the tension of spring 23, while also enhancing adaptability to different patients' faces.

[0044] The design was further optimized so that the two ends of the solid metal rod 3 pass through the other ends of the two telescopic rods 19, and the solid metal rod 3 is set as a hexagonal structure.

[0045] The end face of the telescopic rod 19 is provided with a through hole, and a bolt is connected to the through hole by thread, so as to fix the position of the solid metal rod 3.

[0046] The design is further optimized so that the pulling component includes a metal hook 22, which is hooked onto the facial bone. One end of the metal hook 22 is fixedly connected to a spring 23, and the other end of the spring 23 is fixedly connected to one end of a limiting rod 24. The other end of the limiting rod 24 is sleeved on a solid metal rod 3.

[0047] The metal hook 22 is surgically fixed inside the patient's facial bones, and the spring 23 can be used for pulling.

[0048] The limiting rod 24 is a conventional structural component in the prior art, used to connect the spring and to be slidably fixed to the solid metal rod 3. For the aforementioned limiting rod 24, a sleeve 25 can also be fixedly connected to one end of the limiting rod 24. The inner cavity of the sleeve 25 is a hexagonal structure, and a fixing hole is opened on the outer wall of the sleeve 25. The sleeve 25 is sleeved on the solid metal rod 3, and a fixing bolt 26 is threadedly connected to the fixing hole. The fixing bolt 26 is threadedly connected to the fixing hole, and the end face of the fixing bolt 26 abuts against the outer wall of the solid metal rod 3, thereby realizing the sliding of the limiting rod 24 on the solid metal rod 3, and thus realizing the lateral adjustment of the position of the metal hook 22.

[0049] The sleeve 25 slides on the solid metal rod 3. The position of the sleeve 25 is fixed by rotating the fixing bolt 26, thereby allowing the position of the metal hook 22 to be adjusted laterally, which can pull the bone.

[0050] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A novel extracranial support for maxillofacial bone traction, characterized in that, include: The fixing part includes two side fixing members. The two side fixing members are respectively fixed to the temporal region above the ear on both sides of the head by three first screws (1). The top of the two side fixing members is provided with a cranial top fixing member. The cranial top fixing member is fixed to the cranial top by two second screws (2). The adjustment part includes two angle gauges, which are respectively fixed to the two side fixing members. A sliding member is provided on the side of each angle gauge, and a telescopic member is provided on each angle gauge. One end of the telescopic member is coaxially fixed to the angle gauge and the side fixing member, and the middle part of the telescopic member is fixed to the sliding member. The correction part includes a solid metal rod (3), the two ends of which pass through the other ends of the two telescopic members respectively. Two pulling members are provided on the solid metal rod (3), and the other ends of the two pulling members are connected to the facial bones.

2. A novel extracranial support for maxillofacial bone traction according to claim 1, characterized in that: The side fixing component includes a side arc plate (4), which is configured as a semi-circular structure. Fixing plates are fixed to both ends of the side arc plate (4). The two fixing plates (5) are located on the same straight line and are parallel to the orbital auricular plane. The top of the side arc plate (4) and the two fixing plates (5) are fixed to the temporal region of the upper ear on both sides of the head by a first screw (1). The two ends of the side of the side arc plate (4) are respectively provided with a first through hole (6) and a second through hole (7). The top of the side of the side arc plate (4) is provided with a third through hole (8).

3. A novel extracranial support for maxillofacial bone traction according to claim 2, characterized in that: The cranial fixation component includes two upper arc-shaped plates (9), which are connected by an extension assembly. The two upper arc-shaped plates (9) are respectively fixed to the cranial top by the second screw (2). A connecting hole (10) is provided at the bottom of the upper arc-shaped plate (9), and the connecting hole (10) is fixed to the third through hole (8) by bolts and nuts.

4. A novel extracranial support for maxillofacial bone traction according to claim 3, characterized in that: The extension assembly includes a connecting rod (11), and extension grooves are respectively opened on the end faces of the two upper arc plates (9). The two ends of the connecting rod (11) are respectively in sliding contact with the inner walls of the two extension grooves. Two limiting blocks (12) are respectively fixed to the outer walls of the two ends of the connecting rod (11). A limiting groove adapted to the limiting block (12) is opened on the inner wall of the extension groove.

5. A novel extracranial support for maxillofacial bone traction according to claim 4, characterized in that: The angle ruler includes a positioning plate (13), with a fourth through hole (14) and a fifth through hole (15) respectively opened at both ends of the positioning plate (13). A protractor (16) is fixed to the bottom surface of the positioning plate (13) near the fifth through hole (15). The protractor (16) is set as an arc structure, and angle scales are engraved on the protractor (16). An arc hole (17) is opened on the protractor (16).

6. A novel extracranial support for maxillofacial bone traction according to claim 5, characterized in that: The telescopic component includes a telescopic plate (18), one end of which has a telescopic groove, and one end of a telescopic rod (19) slides in contact with the telescopic groove. The side of the telescopic plate (18) has a threaded hole, and a positioning bolt is threadedly connected to the threaded hole. The end face of the positioning bolt abuts against the side wall of the telescopic rod (19). The other side wall of the telescopic plate (18) has a sixth through hole (20), and the middle of the telescopic plate (18) has a seventh through hole (21). The first through hole (6), the fourth through hole (14), and the sixth through hole (20) are fixed by bolts and nuts. The fifth through hole (15) and the second through hole (7) are fixed by bolts and nuts. The seventh through hole (21) is positioned corresponding to the arc-shaped hole (17), and the seventh through hole (21) and the arc-shaped hole (17) are fixed by bolts and nuts.

7. A novel extracranial support for maxillofacial bone traction according to claim 6, characterized in that: The two ends of the solid metal rod (3) pass through the other ends of the two telescopic rods (19), and the solid metal rod (3) is configured as a hexagonal structure.

8. A novel extracranial support for maxillofacial bone traction according to claim 7, characterized in that: The pulling element includes a metal hook (22) that hooks onto the facial bone. One end of the metal hook (22) is fixed to a spring (23), and the other end of the spring (23) is fixed to one end of a limiting rod (24). The other end of the limiting rod (24) is sleeved on the solid metal rod (3).

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