Lower jawbone intraoral retention device

Abstract

The utility model discloses a lower jawbone intraoral retention device, which relates to the technical field of medical equipment and comprises an upper jaw pad and a lower jaw pad which can be respectively retained on upper teeth and lower teeth on the rear side of an oral cavity, the bottom wall of the upper jaw pad is concavely provided with an adjusting notch, an I-shaped sliding roller is horizontally and adjustably arranged in the adjusting notch, and the I-shaped sliding roller is rotatably sleeved with a hinged plate. The bottom wall of the upper jaw pad is rotationally connected with a pin shaft located below the threaded hole, the radial side wall of the pin shaft is rotationally connected with a pull rod, the end of the hinge plate is rotationally connected to the side wall of the pull rod, and the end of the pull rod is hinged to the upper side wall of the lower jaw pad. According to the intraoral retention device for the mandible, an upper jaw pad abuts against upper teeth on the rear side of the oral cavity to form a retention datum point, an I-shaped sliding roller is adjusted towards the outer side of the oral cavity, and linkage pull rods at the ends of two hinged plates enable the lower jaw pad to generate inclined thrust from the outer lower portion of the oral cavity with a pin shaft as the rotating center; meanwhile, the temporal-mandibular joint gap on the affected side can be adjusted, the fracture broken end can be conveniently reset, and the operation can be efficiently completed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a mandibular intraoral retention device. Background Art

[0002] The mandibular condyle is an important part of the temporomandibular joint and plays an important role in physiological activities such as speech and chewing. Mandibular condyle fracture is one of the common types of mandibular fractures, which often leads to occlusal disorder and chewing dysfunction, seriously affecting the patient's quality of life. For those with obvious downward displacement of the condyle, angular deformity greater than 45°, obvious shortening of the mandibular ramus height by 5mm, inability to obtain a good occlusal relationship by closed reduction, displacement of the condylar fracture fragment to the middle cranial fossa, and outward displacement of the condyle and breaking through the joint capsule, it should be considered as an indication for surgery and generally treated with surgical open reduction and internal fixation.

[0003] Condylar fractures often occur at the condylar neck below the attachment of the lateral pterygoid muscle. Due to the traction of the lateral pterygoid muscle, the broken condyle is displaced forward and inward. If the condyle is pulled forward and inward by the lateral pterygoid muscle, the mandibular ramus will be displaced upward, which will hinder the search for the condyle that is displaced forward and inward. During the operation, a joint space support or towel clamp will be used to pull the mandibular angle downward for the temporomandibular joint surgical area to increase the space to assist in the reduction of the condyle, so as to facilitate the surgical operation and the implantation of bone plates and screws to stabilize the fracture ends.

[0004] However, for the mandible, an assistant is needed to stabilize the mandible with the help of manpower, so that the fracture can be fixed by bone plate screw internal fixation. However, this fixation method has some problems: First, the mandible needs to be stabilized during the operation to facilitate the flat and stable positioning of the two sides of the fracture line in the surgical area and the implantation of bone plate screws, but the stability is poor during manual fixation, which will make the operation more difficult; second, manual fixation not only consumes manpower, but also makes the hands tired and sore. Utility Model Content

[0005] The utility model aims to provide a mandibular intraoral retention device to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a mandibular intraoral retention device, comprising an upper and lower jaw pads that can be respectively retained on the upper and lower teeth at the back of the oral cavity, the upper jaw pad bottom wall is recessed with an adjustment notch, the adjustment notch is horizontally adjustable with an I-shaped sliding roller, the I-shaped sliding roller is rotatably sleeved with a hinge plate, the upper jaw pad bottom wall is rotatably connected with a pin located below the threaded hole, the pin shaft radial side wall is rotatably connected with a pull rod, the end of the hinge plate is rotatably connected to the side wall of the pull rod, and the end of the pull rod is hinged to the upper side wall of the mandibular pad;

[0007] The maxillary pad rests on the upper teeth at the back of the mouth to form a retention reference point. The I-shaped sliding roller is adjusted laterally toward the outside of the mouth. The linkage pull rods at the ends of the two hinged plates use the pin as the rotation center to generate a thrust for the mandibular pad to tilt downward outside the mouth to retain the mandible.

[0008] In a further embodiment, both side walls of the adjustment notch are provided with sliding grooves, rollers that are axially rotatable at both ends of the I-shaped slide roller and are slidably engaged with the corresponding sliding grooves are provided, the I-shaped slide roller is radially rotatably connected with a threaded rod, and the inner wall of the adjustment notch is provided with a threaded hole for threaded connection of the threaded rod.

[0009] In a further embodiment, the end of the threaded rod extending outward from the maxillary pad is connected to a handle;

[0010] The handle and the threaded rod are both fixed with hollow frames at the ends close to each other, one hollow frame is buckled on the other hollow frame, and rotating the handle can drive the threaded rod to rotate synchronously through the two buckled hollow frames.

[0011] In a further embodiment, there are two hinged plates, which are arranged parallel to each other, a support rod is fixed between one end of the two hinged plates and the I-shaped roller for rotational sleeve connection, and one end of the two hinged plates away from the I-shaped roller are symmetrically arranged on both sides of the pull rod, and an accommodating space for accommodating the threaded rod is formed between the two hinged plates.

[0012] In a further embodiment, a silicone pad 1 that can be stuck on both sides of the upper teeth is provided on the side wall of the maxillary pad opposite to the upper teeth at the back of the mouth, and a silicone pad 2 that can be stuck on both sides of the lower teeth is provided on the side wall of the mandibular pad opposite to the lower teeth at the back of the mouth.

[0013] In a further embodiment, the inner side walls of the silicone pad 1 and the silicone pad 2 are both provided with a plurality of V-shaped anti-slip protruding strips.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is a mandibular intraoral retention device, which presses the maxillary pad against the upper teeth at the back of the oral cavity to form a retention reference point, and the I-shaped sliding roller is adjusted toward the outside of the oral cavity. The pull rods at the ends of the two hinged plates are linked to use the pin shaft as the rotation center to generate a thrust for the mandibular pad to tilt downward outside the oral cavity. The retention can also be performed and the temporomandibular joint space on the affected side can be adjusted to achieve the adjustment of the mandibular position to the front and bottom, which is more conducive to opening the temporomandibular joint space and resetting the fracture ends, ensuring efficient completion of the operation; the utility model is a mandibular intraoral retention device, which presses the maxillary pad against the upper teeth at the back of the oral cavity to form a retention reference point, and the I-shaped sliding roller is adjusted toward the outside of the oral cavity, and the I-shaped sliding roller is adjusted toward the outside of the oral cavity to form a thrust for the mandibular pad to tilt downward outside the oral cavity, so as to achieve the adjustment of the temporomandibular joint space to the front and bottom, ensuring the efficient completion of the operation; the utility model is a mandibular intraoral retention device, which presses the maxillary pad against the upper teeth at the back of the oral cavity to form a retention reference point, and the I-shaped sliding roller is adjusted toward the outside of the oral cavity to form a retention reference point, and the I-shaped sliding roller is adjusted toward the back ... BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 A half-section diagram of the maxillary pad structure of an embodiment of the utility model;

[0018] Figure 3 A half-section diagram of the mandibular pad structure according to an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the assembly structure of an I-shaped sliding roller and two hinged plates according to an embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the I-shaped roller, threaded rod and handle structure of an embodiment of the utility model;

[0021] Figure 6 A partial cross-sectional view of an embodiment of the utility model;

[0022] Figure 7 This is a rendering of the effect of the maxillary pad and the mandibular pad of an embodiment of the utility model being fixed on the teeth at the back of the oral cavity.

[0023] In the figure: 1. upper jaw pad; 11. silicone pad one; 12. I-shaped roller; 121. threaded rod; 122. handle; 123. hollow frame; 13. hinged plate; 131. support rod; 14. pin shaft; 15. pull rod; 2. lower jaw pad; 21. silicone pad two. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment, this embodiment provides a mandibular intraoral retention device, such as Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, it includes an upper jaw pad 1 and a lower jaw pad 2 that can be respectively fixed on the upper and lower teeth at the back of the oral cavity. The bottom wall of the upper jaw pad 1 is recessed with an adjustment notch, and an I-shaped sliding roller 12 is horizontally adjustable in the adjustment notch. The I-shaped sliding roller 12 is rotatably sleeved with a hinge plate 13. The bottom wall of the upper jaw pad 1 is rotatably connected to a pin shaft 14 located below the threaded hole, and the radial side wall of the pin shaft 14 is rotatably connected to a pull rod 15. The end of the hinge plate 13 is rotatably connected to the side wall of the pull rod 15, and the end of the pull rod 15 is hinged to the upper side wall of the lower jaw pad 2. The I-shaped sliding roller 12 reciprocates to adjust the position in the horizontal direction in the adjustment notch, and the pull rod 15 is turned around with the pin shaft 14 as the axial direction by using the end of the hinge plate 13. During the turning process of the pull rod 15, the lower jaw pad 2 can be adjusted closer or farther relative to the upper jaw pad 1.

[0026] Slide grooves are provided on the side walls on both sides of the adjustment gap. Rollers that are slidably engaged with the corresponding slide grooves are rotatably provided at both ends of the axial direction of the I-shaped slide roller 12. The I-shaped slide roller 12 is radially rotatably connected with a threaded rod 121. A threaded hole for threaded connection of the threaded rod 121 is provided on the inner wall of the adjustment gap. By rotating the threaded rod 121, the roller of the I-shaped slide roller 12 can be driven to slide horizontally along the slide groove, thereby driving the hinge plate 13 to horizontally adjust the position of one end away from the pull rod 15. The other end of the hinge plate 13 is linked to the pull rod 15 to rotate around the pin 14, thereby driving the mandibular pad 2 to adjust its position.

[0027] The specific operation methods of intraoral retention are: Figure 7 As shown in the simplified diagram of the internal structure of the oral cavity, usually, when a person's eyes are level, during the process of opening and closing the mouth, the upper teeth open and close at a smaller angle, or even remain horizontal, while the lower teeth follow the opening and closing of the mandible in sync, that is, they are adjusted from a horizontal state to an inclined downward state, and then adjusted from an inclined downward state to a horizontal state to contact the upper teeth. In summary, the upper teeth remain stationary, while the lower teeth swing up and down to adjust the size of the mouth opening. Therefore, after the maxillary pad 1 is placed against the upper teeth at the back of the mouth, it serves as a retention reference point, which is equivalent to keeping the upper teeth in a relatively horizontal state during the entire retention process. By adjusting the I-shaped sliding roller 12 laterally toward the outside of the oral cavity, that is, along the direction as shown in the figure, the upper teeth are kept in a relatively horizontal state. Figure 6 The A direction is adjusted as shown, the ends of the two hinged plates 13 are linked with the pull rod 15 with the pin 14 as the rotation center, that is, the angle a value becomes smaller, and at the same time, the end of the pull rod 15 generates a thrust force on the mandibular pad 2 to tilt downward outside the oral cavity. The thrust direction of the mandibular pad 2 is as shown in FIG. Figure 6 The B direction shown in the figure can be used to fix the affected side of the temporomandibular joint and adjust the temporomandibular joint space, so that the mandible can be adjusted to the front and bottom, which is more conducive to opening the temporomandibular joint space and resetting the fracture ends, ensuring the efficient completion of the operation. The conventional intraoral opener generally opens the gap vertically, and can also be used in other types of oral surgery to open the bite and facilitate surgical operations.

[0028] Further, such as Figure 5 As shown, a handle 122 is connected to one end of the threaded rod 121 extending out of the outer side of the maxillary pad 1. The handle 122 is long enough to extend out of the oral cavity, so that the medical staff can rotate it by hand to drive the threaded rod 121 to rotate forward and reversely. The medical staff does not need to put their hands into the oral cavity, so the handle 122 can be operated conveniently.

[0029] In addition, a hollow frame 123 is fixed to the end of the handle 122 and the threaded rod 121 that are close to each other, and one of the hollow frames 123 is buckled on the other hollow frame 123. Rotating the handle 122 can drive the threaded rod 121 to rotate synchronously through the two buckled hollow frames 123. At the same time, the handle 122 can also swing with the other hollow frame 123 using the hollow frame 123, so that the handle 122 and the threaded rod 121 are adjusted from a coaxial distribution to a staggered distribution, so that the handle 122 will not cause excessive expansion of the side assembly of the oral cavity, avoiding discomfort.

[0030] Further, such as Figure 4 As shown, there are two hinge plates 13, and the two hinge plates 13 are arranged parallel to each other. A support rod 131 is fixed between one end of the two hinge plates 13 and the I-shaped roller 12 that are rotatably sleeved. The two hinge plates 13 are symmetrically arranged on both sides of the pull rod 15 at one end away from the I-shaped roller 12. An accommodating space for accommodating the threaded rod 121 is formed between the two hinge plates 13, that is, the I-shaped roller 12 is slid to the outermost side along the slide groove, and the angle between the hinge plate 13 and the pull rod 15 is maximized. In this way, the mandibular pad 2 is adjusted relatively close to the maxillary pad 1, and the threaded rod 121 is accommodated in the accommodating space, which reduces the volume of the entire retaining device and facilitates its removal from the oral cavity after surgery.

[0031] In addition, a silicone pad 11 that can be stuck on both sides of the upper teeth is provided on the side wall of the maxillary pad 1 opposite to the upper teeth at the back of the mouth, and a silicone pad 2 21 that can be stuck on both sides of the lower teeth is provided on the side wall of the mandibular pad 2 opposite to the lower teeth at the back of the mouth. Because the upper and lower posterior teeth are arranged in a slightly arc shape, and some teeth are unevenly arranged, the silicone pad 11 and the silicone pad 2 21 can adapt to the uneven arrangement of the posterior teeth after respectively contacting the upper and lower teeth. At the same time, when contacting the upper and lower teeth in a force-applied state, they can play an effective buffering role to protect the upper and lower teeth.

[0032] Moreover, the inner side walls of silicone pad 1 11 and silicone pad 2 21 are provided with multiple V-shaped anti-slip protrusions. Anti-slip protrusions can be set on the inner side surfaces and top walls of silicone pad 1 1 and silicone pad 2 21, and the tip of the anti-slip protrusion is inclined toward the deep part of the oral cavity. This can make it more anti-slip when force is applied and prevent the retention device from slipping.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mandibular intraoral retention device, comprising an upper jaw pad (1) and a lower jaw pad (2) capable of being retained on the upper and lower teeth at the back of the oral cavity, respectively, characterized in that: The bottom wall of the maxillary pad (1) is recessed with an adjustment notch, and an I-shaped roller (12) is horizontally adjustable in the adjustment notch. The I-shaped roller (12) is rotatably sleeved with a hinge plate (13). The bottom wall of the maxillary pad (1) is rotatably connected to a pin shaft (14) located below the threaded hole, and the radial side wall of the pin shaft (14) is rotatably connected to a pull rod (15). The end of the hinge plate (13) is rotatably connected to the side wall of the pull rod (15), and the end of the pull rod (15) is hinged to the upper side wall of the mandibular pad (2); The maxillary pad (1) is pressed against the upper teeth at the back of the oral cavity to form a retention reference point, the I-shaped sliding roller (12) is adjusted laterally toward the outside of the oral cavity, and the ends of the two hinged plates (13) are linked with the pull rod (15) to generate a thrust force tilting downward outside the oral cavity with the pin shaft (14) as the rotation center to retain the mandibular bone.

2. The mandibular intraoral retention device according to claim 1, characterized in that: Slide grooves are provided on both side walls of the adjustment notch, rollers rotatably provided at both ends of the I-shaped roller (12) for sliding engagement with the corresponding slide grooves, the I-shaped roller (12) is radially rotatably connected to a threaded rod (121), and a threaded hole for threaded connection of the threaded rod (121) is provided on the inner wall of the adjustment notch.

3. The mandibular intraoral retention device according to claim 2, characterized in that: One end of the threaded rod (121) extending out of the outer side of the maxillary pad (1) is connected to a handle (122); A hollow frame (123) is fixed to the ends of the handle (122) and the threaded rod (121) that are close to each other, and one hollow frame (123) is buckled on the other hollow frame (123). Rotating the handle (122) can drive the threaded rod (121) to rotate synchronously through the two buckled hollow frames (123).

4. The mandibular intraoral retention device according to claim 1, characterized in that: The hinged plates (13) are provided with two hinged plates (13), which are arranged parallel to each other. A support rod (131) is fixed between one end of the two hinged plates (13) rotatably sleeved with the I-shaped roller (12). The ends of the two hinged plates (13) away from the I-shaped roller (12) are symmetrically arranged on both sides of the pull rod (15), and an accommodating space for accommodating the threaded rod (121) is formed between the two hinged plates (13).

5. The mandibular intraoral retention device according to any one of claims 1 to 4, characterized in that: The side wall of the maxillary pad (1) opposite to the upper teeth at the back of the oral cavity is provided with a first silicone pad (11) capable of being stuck on both sides of the upper teeth, and the side wall of the mandibular pad (2) opposite to the lower teeth at the back of the oral cavity is provided with a second silicone pad (21) capable of being stuck on both sides of the lower teeth.

6. The mandibular intraoral retention device according to claim 5, characterized in that: The inner side walls of the silicone pad 1 (11) and the silicone pad 2 (21) are both provided with a plurality of V-shaped anti-slip protruding strips.

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