A bone-supported mandibular advancement device

Abstract

This application relates to a bone-supported mandibular advancement device, belonging to the technical field of medical devices. The bone-supported mandibular advancement device includes: a pair of implant pins respectively implanted into the upper and lower root jawbone regions; a telescopic guide member including a connecting sleeve and a connecting rod respectively connected to the pair of implant pins, one end of the connecting rod being slidably connected within the connecting sleeve, and within the connecting sleeve, a limiting structure is formed between the connecting sleeve and the connecting rod, and the limiting structure is configured to limit the separation of the connecting sleeve and the connecting rod. This application solves the problems that a too-long connecting rod is likely to cause damage to the user's oral cavity and a too-short connecting rod is likely to disengage from the connecting sleeve by connecting and fixing the telescopic guide member to the implant pins and arranging the limiting structure within the connecting sleeve to limit the connecting rod. The arrangement of the limiting structure within the connecting sleeve ensures that the outer surface of the telescopic guide member is smooth and will not cause frictional damage to the user's oral cavity due to the setting of the limiting structure.

Description

Technical Field

[0001] The invention relates to a bone-supported mandibular thruster, belonging to the technical field of medical devices. Background Art

[0002] Functional correction is an important part of orthodontic treatment. It uses functional appliances to promote normal growth and development of the craniofacial region by regulating the function of oral and facial muscles, so as to achieve the purpose of correcting dental and jaw deformities.

[0003] The traditional lateral guide rod brace is called a Herbst brace, which is basically used in conjunction with braces and telescopic guide rods. The braces are sleeved on the posterior molars, and the telescopic guide rods are connected between the upper and lower braces to achieve the correction purpose by advancing the mandible. For example, Chinese patent publication number CN217566375U discloses a lateral guide rod brace, which includes an upper brace, a lower brace, a plurality of occlusal plate modules and two sets of prefabricated guide rods; the upper brace and the lower brace each include a tooth receiving groove, and the outer side of the opposite surface of the opening of the tooth receiving groove forms a first occlusal surface; the occlusal plate module is connected to the first occlusal surface of the upper brace or the lower brace; when the upper brace and the lower brace are worn on the teeth and occluded, the occlusal plate module fills the gap between the upper brace and the lower brace and fits with the upper brace or the lower brace on the opposite side of the occlusal plate module; the prefabricated guide rods are respectively connected between the outer side surfaces of the upper brace and the lower brace and are located on the left and right sides of the upper brace and the lower brace. The lateral guide rod appliance is manufactured by combining an occlusal plate module, a prefabricated guide rod and a hot-pressed film brace appliance; it has a short production cycle and has the advantages of little foreign body sensation, strong functionality, and beautiful and hygienic appearance. However, there are still unresolved problems during use. First, the part of the teeth without braces is easily squeezed and displaced, causing the teeth in this part to be misaligned with each other; second, to prevent the user from opening their mouth too wide and causing the sleeve and the sleeve rod to separate, the length of the sleeve rod is usually greater than the length of the sleeve. Therefore, when the user's mouth is closed, the sleeve rod extends from the tail of the sleeve, which is easy to press against and rub the user's mouth, which can easily cause damage to the user's mouth and result in a very poor user experience. Third, during installation, the connecting sleeve and the connecting rod are easily separated, making installation inconvenient and posing a risk of damaging the user's mouth. Summary of the Invention

[0004] The object of the present invention is to provide a bone-supported mandibular thruster to solve the above problems.

[0005] To achieve the above object, the present invention provides the following technical solution: a bone-supported mandibular thruster, comprising:

[0006] A pair of implant nails are implanted into the upper and lower tooth root jaw areas respectively;

[0007] The telescopic guiding member includes a connecting sleeve and a connecting rod respectively connected to a pair of the implanting nails. One end of the connecting rod is slidably connected inside the connecting sleeve, and a limiting structure is formed between the connecting sleeve and the connecting rod. The limiting structure is configured to limit the separation of the connecting sleeve and the connecting rod.

[0008] Further, the limiting structure includes a limiting member disposed inside the connecting sleeve and a clamping member disposed at one end of the connecting rod located inside the connecting sleeve. At least a through hole for passing through the connecting rod is formed on the limiting member, and the projection of the clamping member in the axial direction of the connecting sleeve overlaps with the projection of the limiting member in the axial direction of the connecting sleeve.

[0009] Further, the limiting member is a limiting ring, the inner diameter of the limiting ring is equal to the diameter of the connecting rod, the clamping member is a clamping disc detachably connected to the end of the connecting rod, and the diameter of the clamping disc is smaller than the inner diameter of the connecting sleeve.

[0010] Further, the limiting member is a plurality of limiting blocks circumferentially and spacedly arranged along the inner wall of the connecting sleeve, and the clamping member is a plurality of clamping blocks circumferentially and spacedly arranged along the connecting rod, and the gaps between the plurality of clamping blocks are in shape adaptation and one-to-one correspondence with the plurality of limiting blocks.

[0011] Further, there are four groups of the limiting blocks, and the four groups of the limiting blocks enclose a cross-shaped through hole.

[0012] Further, both the limiting member and the clamping member are magnetic rings. Magnetic rings are respectively disposed at both ends of the connecting sleeve, and the magnetic poles of the two magnetic rings in the opposite directions are the same as those of the magnetic rings on the connecting rod.

[0013] Further, connecting rings for sleeving with the implanting nails are respectively disposed on the connecting sleeve and the connecting rod, and the connecting rings are arranged on the side surfaces of the connecting sleeve or the connecting rod.

[0014] Further, the implanting nail includes an implanting nail body and a fixing cap. The implanting nail body includes an implanting portion and a connecting portion extending outward from the end of the implanting portion. Threads are formed on the connecting portion, and the fixing cap is threadedly connected to the connecting portion to fix the connecting ring.

[0015] Further, the fixing cap includes a connecting end threadedly connected to the connecting portion and a clamping end for limiting the telescopic guiding member.

[0016] Further, the cross section of the clamping end is semi-circular or quasi-triangular.

[0017] The beneficial effects of the present invention are as follows: By connecting and fixing the telescopic guiding member with the implant nail and arranging a limiting structure in the connecting sleeve to limit the connecting rod, the present application solves the problems that the connecting rod is too long and prone to damage the user's oral cavity, and the connecting rod is too short and prone to detachment from the connecting sleeve. The limiting structure is arranged in the connecting sleeve, ensuring that the outer surface of the telescopic guiding member is smooth and will not cause frictional damage to the user's oral cavity due to the arrangement of the limiting structure. At the same time, by fixing the telescopic guiding member with the implant nail, tooth displacement and misalignment caused by applying force to some teeth during the orthodontic process are avoided, improving the orthodontic experience of the patient.

[0018] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the bone-supported mandibular advancement device shown in Embodiment 1 of the present application;

[0020] Figure 2 It is a schematic structural diagram of the bone-supported mandibular advancement device shown in Embodiment 2 of the present application;

[0021] Figure 3 It is a schematic internal structural diagram of the bone-supported mandibular advancement device shown in Embodiment 3 of the present application;

[0022] Figure 4 It is a schematic structural diagram of the implant nail shown in an embodiment of the present application. Detailed Description of the Preferred Embodiments

[0023] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Please refer to Figure 1 and Figure 4 As shown in an embodiment of the present application, a bone-supported mandibular advancement device includes a pair of implant pins 10 and a telescopic guide member. The pair of implant pins 10 are respectively implanted into the upper and lower root jawbone regions. The telescopic guide member includes a connection sleeve 20 and a connecting rod 30 respectively connected to the pair of implant pins 10. One end of the connecting rod 30 is slidably connected inside the connection sleeve 20. A limiting structure is formed between the connection sleeve 20 and the connecting rod 30, and the limiting structure is configured to limit the separation of the connection sleeve 20 and the connecting rod 30. By setting the implant pins 10 to fix the telescopic guide member, it is avoided to set a dental brace, so that the reaction force of the telescopic guide member is applied to the jawbone during the orthodontic treatment, thereby avoiding tooth misalignment caused by the orthodontic appliance. At the same time, the limiting structure is used to limit the connecting rod 30 from sliding out of the connection sleeve 20 on the side away from the fixed end, so that it is not necessary to set a too long connecting rod 30 to ensure that the connecting rod 30 does not slide out of the connection sleeve 20. And the limiting structure can also prevent the connection sleeve 20 and the connecting rod 30 from separating when the medical staff installs the telescopic guide member in the user's oral cavity, effectively reducing the installation difficulty. Moreover, the limiting structure arranged inside the connection sleeve 20 can also ensure the smooth appearance of the connection sleeve 20.

[0027] In one embodiment, the limiting structure includes a limiting member arranged inside the connection sleeve 20 and a clamping member arranged at one end of the connecting rod 30 located inside the connection sleeve 20. At least a through hole for passing through the connecting rod 30 is formed on the limiting member, and the projection of the clamping member in the axial direction of the connection sleeve 20 overlaps with the projection of the limiting member in the axial direction of the connection sleeve 20. The limiting member is arranged on the inner wall of the connection sleeve 20 at the end away from the fixed end, and the through hole is arranged at the center of the limiting member. The connecting rod 30 passes through the through hole into the connection sleeve 20, so as to ensure that the connecting rod 30 can slide inside the connection sleeve 20. When the clamping member moves to the end of the connection sleeve 20, it abuts against the limiting member, so as to ensure that the connection sleeve 20 and the connecting rod 30 do not separate.

[0028] Example 1:

[0029] Please refer to Figure 1, in one embodiment, the limiting member is a limiting ring 21a, the inner diameter of the limiting ring 21a is equal to the diameter of the connecting rod 30, and the clamping member is a clamping disc 31a detachably connected to the end of the connecting rod 30. The diameter of the clamping disc 31a is smaller than the inner diameter of the connecting sleeve 20. The clamping disc 31a is threadedly connected to the end of the connecting rod 30, so that the connecting rod 30 can first be inserted into the connecting sleeve 20 from the center of the limiting ring 21a, and the clamping disc 31a can be inserted into the connecting sleeve 20 from the other end of the connecting sleeve 20 and fixed to the end of the connecting rod 30, thus facilitating installation while achieving the limiting effect.

[0030] Embodiment 2:

[0031] Please refer to Figure 2 , in one embodiment, the limiting member is a plurality of limiting blocks 21b arranged at intervals along the circumferential direction of the inner wall of the connecting sleeve 20, and the clamping member is a plurality of clamping blocks 31b arranged at intervals along the circumferential direction of the connecting rod 30 and having a shape adapted to and corresponding one-to-one with the gaps 22 between the plurality of limiting blocks 21b. With such a setting, it is convenient to fixedly arrange the clamping blocks 31b on the connecting rod 30, avoiding the disengagement of the clamping member from the connecting rod 30 and resulting in the failure of the limiting effect. Moreover, after the connecting rod 30 is inserted into the connecting sleeve 20, the limiting effect can be achieved only by rotating a certain angle, and the assembly method of the connecting rod 30 and the connecting sleeve 20 is simpler and faster.

[0032] In one embodiment, there are four groups of limiting blocks 21b, and the four groups of limiting blocks 21b enclose a cross-shaped through hole. Four groups of clamping blocks 31b are fixed to the end of the connecting rod 30 to form a cross-shaped clamping member. The cross-shaped clamping member penetrates into the connecting sleeve 20 from the cross-shaped through hole, and the connecting rod 30 is rotated by a certain angle, so that the projection of the clamping block 31b in the axial direction of the connecting sleeve 20 overlaps with the projection of the limiting block 21b in the axial direction of the connecting sleeve 20, thereby restricting the connecting rod 30 from disengaging from the connecting sleeve 20. Preferably, the rotation angle is 45°, that is, when the connecting sleeve 20 and the connecting rod 30 are respectively fixed on the implanting nail 10, the included angle between the gaps 22 between the clamping blocks 31b and the limiting blocks 21b is 45°, so that the projection of the clamping block 31b in the axial direction of the connecting sleeve 20 falls on the center line of the projection of the limiting block 21b in the axial direction of the connecting sleeve 20 to provide the best limiting effect.

[0033] In other embodiments, elastic pads can also be provided on both sides of the clamping block 31b. The total width of the elastic pads and the clamping block 31b is slightly larger than the width of the gap 22. When an external force is applied to push the clamping block 31b into the connecting sleeve 20 from the gap, the elastic pads are squeezed and deformed. After the clamping block 31b extends into the connecting sleeve 20, the elastic pads return to their original state, so that it is difficult for the clamping block 31b to slide out from the gap 22 without the application of an external force.

[0034] Embodiment 3:

[0035] Please refer to Figure 3 In one embodiment, the limiting member and the holding member are both magnetic rings, and magnetic rings are respectively provided at both ends of the connecting sleeve 20, and the two magnetic rings have the same magnetic poles as the magnetic ring on the connecting rod 30 in the opposite direction. The magnetic ring includes a first magnetic ring 50a arranged at the head end of the connecting sleeve 20, a second magnetic ring 50b arranged on the connecting rod and a third magnetic ring 50c arranged at the tail end of the connecting sleeve 20, wherein the magnetic poles of the first magnetic ring 50a and the second magnetic ring 50b in relative directions are the same, and the magnetic poles of the second magnetic ring 50b and the third magnetic ring 50c in relative directions are the same. When the end of the connecting rod 30 is close to the head end of the connecting sleeve 20, the repulsive force between the first magnetic ring 50a and the second magnetic ring 50b limits the separation of the connecting rod 30 and the connecting sleeve 20, and reminds the user that the end of the connecting rod 30 is about to reach the head end of the connecting sleeve 20. At the same time, during the user's mouth closure correction process, when the end of the connecting rod 30 is close to the tail end of the connecting sleeve 20, the repulsive force between the second magnetic ring 50b and the third magnetic ring 50c assists the patient's mandibular protrusion, thereby improving the correction guidance effect.

[0036] In one embodiment, a connecting ring 40 for sleeve-engaging with the implant pin 10 is provided on each of the connecting sleeve 20 and the connecting rod 30. The connecting ring 40 is disposed on the side of the connecting sleeve 20 or the connecting rod 30. By providing the connecting ring 40 on the side of the connecting sleeve 20 and the connecting rod 30, the reaction force of the telescopic guide does not directly act on the implant pin 10. Instead, the deformation and displacement pressure exerted by the telescopic guide on the implant pin 10 is alleviated by the rotation of the connecting sleeve 20 and the connecting rod 30 relative to the implant pin 10.

[0037] Please refer to Figure 4 In one embodiment, the implant nail 10 includes an implant nail body and a fixing cap 13. The implant nail body includes an implant portion 11 and a connecting portion 12 extending outward from the end of the implant portion 11. The connecting portion 12 is formed with a thread, and the fixing cap 13 is threadedly connected to the connecting portion 12 to fix the connecting ring 40. The diameter of the implant portion 11 decreases from the exposed end to the end implanted in the jawbone. The diameter of the connecting portion 12 is smaller than the maximum diameter of the end of the implant portion 11. The connecting ring 40 is sleeved on the connecting portion 12, and the fixing cap 13 is covered on the end of the connecting portion 12. Compared with the traditional implant nail 10, it is necessary to groove the implant nail body and insert the fixing cap 13 into the groove, thereby improving the connection strength between the implant nail body and the fixing cap 13.

[0038] In one embodiment, the fixing cap 13 includes a connecting end threadedly connected to the connecting portion 12 and a clamping end for restricting the telescopic guide member. The connecting end may be a fixing hole formed by recessing inward from the surface of the fixing cap 13, or a connecting sleeve extending outward from the surface of the fixing cap 13. The diameter of the clamping end is greater than the inner diameter of the connecting ring 40, and the connecting ring 40 is sleeved outside the connecting sleeve, thereby restricting the connecting ring 40 from detaching from the implant nail 10.

[0039] In one embodiment, the cross-section of the clamping end is semi-circular or quasi-triangular. Specifically, the clamping end may be a round-head fixing cap 13 for fixing the telescopic guide member to improve the frictional comfort between the fixing cap 13 and the oral cavity. The clamping end may also be a quasi-elliptical fixing cap 13 for fixing the tensioning rubber band, etc. Of course, the clamping end may also be of other shapes, which can be set according to needs and will not be specifically limited herein.

[0040] This application solves the problems that the connecting rod is too long and prone to damage the user's oral cavity, and the connecting rod is too short and prone to detach from the connecting sleeve by connecting and fixing the telescopic guide member to the implant nail and arranging a limiting structure in the connecting sleeve to limit the connecting rod. The limiting structure is arranged in the connecting sleeve, ensuring that the outer surface of the telescopic guide member is smooth and will not cause frictional damage to the user's oral cavity due to the arrangement of the limiting structure. At the same time, by fixing the telescopic guide member with the implant nail, it avoids the displacement and misalignment of some teeth caused by applying force to the teeth during the orthodontic process, improving the orthodontic experience of the patient.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0042] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A bone-supported mandibular advancement device, characterized in that, The bone-supported mandibular advancement device comprises: A pair of implant pins respectively implanted into the upper and lower root jawbone regions. The implant pin comprises an implant pin body and a fixing cap. The implant pin body comprises an implant part and a connecting part extending outward from the end of the implant part. The diameter of the connecting part is smaller than the maximum diameter of the end of the implant part. A telescopic guiding member, comprising a connecting sleeve and a connecting rod respectively connected to the pair of implant pins. One end of the connecting rod is slidably connected within the connecting sleeve. A limiting structure is formed between the connecting sleeve and the connecting rod. The limiting structure is configured to limit the separation of the connecting sleeve and the connecting rod. Connecting rings for sleeving the implant pins are respectively arranged on the connecting sleeve and the connecting rod. The connecting rings are arranged on the side surface of the connecting sleeve or the connecting rod. Threads are formed on the connecting part. The fixing cap is threadedly connected to the connecting part to fix the connecting ring.

2. The bone-supported mandibular advancement device according to claim 1, wherein The limiting structure comprises a limiting member arranged within the connecting sleeve and a clamping member arranged at one end of the connecting rod located within the connecting sleeve. At least a through hole for passing through the connecting rod is formed on the limiting member. The projection of the clamping member in the axial direction of the connecting sleeve overlaps with the projection of the limiting member in the axial direction of the connecting sleeve.

3. The bone-supported mandibular advancement device according to claim 2, wherein The limiting member is a limiting ring. The inner diameter of the limiting ring is equal to the diameter of the connecting rod. The clamping member is a clamping disc detachably connected to the end of the connecting rod. The diameter of the clamping disc is smaller than the inner diameter of the connecting sleeve.

4. The bone-supported mandibular advancement device according to claim 3, wherein The limiting member is a plurality of limiting blocks arranged at intervals along the circumferential direction of the inner wall of the connecting sleeve. The clamping member is a plurality of clamping blocks arranged at intervals along the circumferential direction of the connecting rod, with the gap shapes adapted to and corresponding one by one to the plurality of limiting blocks.

5. The bone-supported mandibular advancement device according to claim 4, characterized in that, Four groups of the limiting blocks are provided. The four groups of limiting blocks enclose and form a cross-shaped through hole.

6. The bone-supported mandibular advancement device according to claim 2, wherein Both the limiting member and the clamping member are magnetic rings. Magnetic rings are respectively arranged at both ends of the connecting sleeve. The magnetic poles of the two magnetic rings in the opposite directions are the same as those of the magnetic rings on the connecting rod.

7. The bone-supported mandibular advancement device according to claim 1, wherein, The fixing cap comprises a connecting end threadedly connected to the connecting part and a clamping end for limiting the telescopic guiding member.

8. The bone-supported mandibular advancement device according to claim 7, wherein The cross section of the clamping end is semicircular or quasi-triangular.

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