Auxiliary fixing device for magnetic resonance examination of temporomandibular joint

Abstract

The invention discloses a temporomandibular joint auxiliary fixing device for magnetic resonance examination. The temporomandibular joint auxiliary fixing device comprises a lower supporting device, an upper supporting device and an adjusting device. The lower supporter is rotationally connected with the upper supporter; an adjusting device is arranged at the tail end of the upper supporting device; the adjusting device comprises a limiting table, a limiting piece, a reset table, a fixing shaft, a reset spring and a rotary knob. The fixing shaft is fixedly connected with the upper supporting device, and a round hole is formed in the fixing shaft and provided with a reset spring. The front end of the reset spring is provided with a limiting table slidably connected with the fixing shaft. A reset table is arranged at the front end of the limiting table, and a knob is arranged at the front end of the reset table; the limiting piece is rotationally connected with the lower supporting device. When magnetic resonance examination is carried out, the rotary knob is rotated to drive the upper supporting device to rotate, the limiting teeth are clamped through the blocking piece after adjustment is completed, the limiting teeth are prevented from being overturned, and therefore the device is locked.

Description

Technical Field

[0001] The invention belongs to the technical field of medical auxiliary equipment, and in particular relates to an auxiliary fixation device for a temporomandibular joint during magnetic resonance examination. Background Art

[0002] Temporomandibular joint disorder syndrome is a term covering a range of diseases caused by anatomical and functional abnormalities of the temporomandibular joint and its related structures; these structures include the condyle, glenoid fossa and articular disc; the causes of the syndrome are varied and may include internal and external trauma to the joint, psychosocial stress and bad oral habits; temporomandibular joint disorder syndrome is more common in young and middle-aged women aged 20 to 40, but may also affect adolescents; the types of the syndrome include muscle disorders, joint structure disorders, inflammatory diseases and bone and joint diseases; common symptoms include pain, difficulty chewing, joint clicking, etc.; currently, magnetic resonance imaging takes a long time, and patients with temporomandibular joints need to keep their mouths open, but most patients have poor self-compliance, resulting in poor image quality. Therefore, during the examination, a fixation device is needed to allow the patient to bite during the examination to fix the patient's mouth opening angle, open the temporomandibular joint, and keep it still;

[0003] According to a patent publication numbered CN113940657B, a dynamic nuclear magnetic resonance examination device for the temporomandibular joint is disclosed. In the cited document, the upper brace is slidably connected to one side of the lower brace through a fixed shaft, a rotating sleeve, a support rod, a connecting shaft, a connecting plate, a sliding block, and a clamping strip, and is used for dynamic magnetic resonance examination to determine whether there are abnormalities in the position of the articular fossa, articular disc, and condyle during the process of opening and closing the mouth, thereby helping the patient to evenly open and close the mouth.

[0004] In actual use, the cited document still has certain defects in use, that is, when the device is actually used, the through holes on the device are less applicable due to the different dental conditions of the patients being examined, and when facing patients for whom the device is not applicable, the upper and lower braces have no fixed connection points, resulting in poor stability and applicability of the device. At the same time, since the patient keeps his mouth open for a long time, the secreted saliva accumulates, causing discomfort to the patient. Therefore, in response to the above problems, an auxiliary fixation device for magnetic resonance imaging of the temporomandibular joint is proposed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention designs an auxiliary fixation device for the temporomandibular joint during magnetic resonance examination, wherein an upper supporter and a lower supporter are provided, and connecting shafts are provided at the ends respectively, and the connecting shafts are connected by a fixed shaft to ensure the stability of the device during use. At the same time, a limit table is provided at the front end of the fixed shaft, and the limit plate is used to limit the position to control the opening angle between the upper supporter and the lower supporter; at the same time, a saliva tank is provided in the lower supporter to collect the patient's saliva during the examination, thereby improving the patient's comfort;

[0006] In order to achieve the above technical effects, the present invention is implemented by the following technical solutions: an auxiliary fixation device for magnetic resonance examination of the temporomandibular joint, comprising: a lower support, an upper support, and an adjustment device;

[0007] The lower support is rotatably connected to the upper support; an adjustment device is provided at the end of the upper support;

[0008] The adjusting device comprises: a limit table, a limit plate, a reset table, a fixed shaft, a reset spring, and a knob; the fixed shaft is fixedly connected to the upper support, a round hole is provided inside the fixed shaft to set the reset spring; a limit table is provided at the front end of the reset spring; a reset table is provided at the front end of the limit table, and a knob is provided at the front end of the reset table; the limit plate is rotatably connected to the lower support;

[0009] Furthermore, the limiting platform is provided with limiting teeth, and the diameter of the top of the limiting teeth is slightly smaller than the inner diameter of the circular hole of the fixed shaft, and the diameter of the root of the limiting teeth is larger than the diameter of the reset platform;

[0010] Furthermore, the limiting piece is divided into a paddle, a baffle, and a connecting ring; the connecting ring is rotatably connected to the lower support, and a paddle is arranged on one side of the connecting ring, and a baffle is arranged on the other side;

[0011] Furthermore, the limiting teeth are arranged at the front end of the limiting platform, and a positioning shaft is arranged at the rear end of the limiting platform to be slidably connected to the fixed shaft;

[0012] Furthermore, the lower support device includes a limit rotating shaft, a lower occlusal platform, a saliva bin, a saliva discharge port, a lower support plate, and a lower connecting shaft; the lower connecting shaft is rotatably connected to a fixed shaft at both ends of the lower support plate, a groove is provided in the middle of the lower support plate to arrange the lower occlusal platform, and the saliva bin is provided on both sides of the groove; the saliva discharge port is provided in the middle of the saliva bin; a limit rotating shaft is rotatably connected to a connecting ring at the outer side of the lower connecting shaft;

[0013] Furthermore, the saliva bin has an upper opening near the lower occlusal table to collect saliva, and the bottoms of both sides of the saliva bin are inclined toward the middle saliva discharge outlet;

[0014] Furthermore, the upper support device includes an upper support plate, an upper connecting shaft, and an upper occlusal platform; upper connecting shafts are arranged at both ends of the upper support plate, and an upper occlusal platform is arranged in the middle of the upper support plate; the upper connecting shaft is fixedly connected to the fixed shaft.

[0015] The beneficial effects of the present invention are:

[0016] The present invention connects the lower support plate and the upper support plate by designing a fixed shaft, so that the ends of the lower support and the upper support are coaxially connected, thereby improving the stability of the device, and the lower support and the upper support are connected only at the two ends, and the middle is in a hollow state, so as to prevent the device from entering the patient's mouth when in use and causing discomfort to the patient, and by arranging a saliva chamber in the lower support, the saliva generated by the patient during the examination is collected, and after the collection is completed, the saliva is discharged through the saliva discharge port, thereby improving the comfort of the patient's examination;

[0017] At the same time, by arranging an adjustment device at the connection between the lower support and the upper support, the upper support is driven to rotate by rotating the knob during magnetic resonance examination. After the adjustment is completed, the limit teeth are clamped by the baffle to prevent the limit teeth from flipping, thereby locking the device. When the device needs to reduce the opening angle, the knobs on both sides are pressed at the same time to make the limit teeth disengage from the baffle restriction, thereby resetting the device; the stability of the device and the ease of operation are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the overall structure of a magnetic resonance imaging auxiliary fixation device for the temporomandibular joint;

[0020] Figure 2 It is a cross-sectional view of the connection of the auxiliary fixation device of the temporomandibular joint by magnetic resonance imaging;

[0021] Figure 3 It is a schematic diagram of the structure of an adjustment device of a magnetic resonance imaging auxiliary fixation device for temporomandibular joints;

[0022] Figure 4 It is a cross-sectional view of the lower support of a MRI-assisted fixation device for the temporomandibular joint;

[0023] Figure 5 It is a cross-sectional view of the interior of an adjustment device of a MRI-assisted fixation device for a temporomandibular joint;

[0024] Figure 6 It is a partial view of the connection of the auxiliary fixation device of the temporomandibular joint by magnetic resonance imaging;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-lower support, 101-limiting rotating shaft, 102-lower occlusal platform, 103-saliva chamber, 104-saliva discharge outlet, 105-lower support plate, 106-lower connecting shaft, 2-upper support, 201-upper support plate, 202-upper connecting shaft, 203-upper occlusal platform, 3-adjusting device, 301-limiting tooth, 302-limiting plate, 3021-paddle, 3022-blocking plate, 3023-connecting ring, 303-reset platform, 304-fixed shaft, 305-reset spring, 306-knob, 307-limiting platform. DETAILED DESCRIPTION

[0027] The invention discloses an auxiliary fixation device for the temporomandibular joint for magnetic resonance examination, comprising: a lower supporter 1, an upper supporter 2, and an adjusting device 3; the lower supporter 1 is rotatably connected to the upper supporter 2; the adjusting device 3 is arranged at the end of the upper supporter 2; the adjusting device 3 comprises: a limit platform 307, a limit piece 302, a reset platform 303, a fixed shaft 304, a reset spring 305, and a knob 306; the fixed shaft 304 is fixedly connected to the upper supporter 2, and a round hole is provided inside the fixed shaft 304 to arrange the reset spring 305; a limit platform 307 is arranged at the front end of the reset spring 305 to be slidably connected to the fixed shaft 304; a reset platform 303 is arranged at the front end of the limit platform 307, and a knob 306 is arranged at the front end of the reset platform 303; the limit plate 302 is rotatably connected to the lower supporter 1; when performing magnetic resonance examination, the upper supporter 2 is driven to rotate by rotating the knob 306, and after the adjustment is completed, the limit tooth 301 is clamped by the blocking piece 3022 to prevent the limit tooth 301 from turning over, thereby locking the device.

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example 1

[0030] like Figure 1 , 3As shown in , 5 and 6, the lower support 1 is rotatably connected to the upper support 2; the adjusting device 3 is arranged at the end of the upper support 2; the adjusting device 3 comprises: a limit table 307, a limit piece 302, a reset table 303, a fixed shaft 304, a reset spring 305 and a knob 306; the fixed shaft 304 is fixedly connected to the upper support 2, and a round hole is provided inside the fixed shaft 304 to set the reset spring 305; a limit table 307 is arranged at the front end of the reset spring 305; a reset table 303 is arranged at the front end of the limit table 307, and a knob 306 is arranged at the front end of the reset table 303; the limit piece 302 Rotatably connected to the lower support 1; a limiting tooth 301 is arranged on the limiting platform 307, and the diameter of the tooth top of the limiting tooth 301 is slightly smaller than the inner diameter of the circular hole of the fixed shaft 304, and the root diameter of the limiting tooth 301 is larger than the diameter of the reset platform 303; the limiting piece 302 is divided into a paddle 3021, a baffle 3022, and a connecting ring 3023; the connecting ring 3023 is rotatably connected to the lower support 1, a paddle 3021 is arranged on one side of the connecting ring 3023, and a baffle 3022 is arranged on the other side; the limiting tooth 301 is arranged at the front end of the limiting platform 307, and a positioning shaft is arranged at the rear end of the limiting platform 307 to slide and connect the fixed shaft 304;

[0031] In this embodiment, when the adjustment mechanism is in use, the knob 306 is rotated to drive the fixed shaft 304 to rotate, and the rotation of the fixed shaft 304 drives the upper support 2 to rotate, thereby adjusting the angle between the upper support 2 and the lower support 1. After the adjustment is completed, the end of the baffle 3022 is clamped on the limiting tooth 301 to prevent the upper support 2 from reversing and limit it.

[0032] When the device needs to reduce the angle between the upper support 2 and the lower support 1, the knobs 306 on both sides are pressed at the same time to compress the reset spring 305, so that the limit platform 307 and the limit tooth 301 extend into the fixed shaft 304, so that the limit tooth 301 is free from the restriction of the baffle 3022, and the position of the baffle 3022 is in contact with the reset platform 303, so that the upper support 2 can be rotated and reset. After the adjustment is completed, the knob 306 is released, and the limit tooth 301 is extended again through the reset action of the spring. After extending, if the limit tooth 301 is stuck by the baffle 3022, it can be adjusted by the paddle 3021;

[0033] In this embodiment, the adjustment mechanism connects the upper support 2 and the lower support 1 through the fixed shaft 304, which ensures the stability of the device during use and prevents the problem of horizontal displacement of the device during use. The present invention can lock the adjusted angle through the cooperation of the limit tooth 301 and the baffle 3022 to prevent the device from being displaced during the inspection process; at the same time, by pressing the knob 306, the limit tooth 301 can be separated from the restriction of the baffle 3022, so that the device can be quickly reset and the ease of use of the device can be improved. At the same time, the device of the invention is designed to be hollow in the middle, which prevents the device from entering the patient's mouth and reduces the patient's discomfort; it solves the problem of poor stability and poor applicability of the device due to the lack of fixed connection points between the upper and lower braces in the cited documents.

[0034] Example 2

[0035] like Figure 1 , 2 As shown in , 4 and 6, the lower support device 1 includes a limit rotating shaft 101, a lower occlusal platform 102, a saliva bin 103, a saliva outlet 104, a lower support plate 105, and a lower connecting shaft 106; lower connecting shafts 106 are arranged at both ends of the lower support plate 105 to rotatably connect to the fixed shaft 304, a groove is provided in the middle of the lower support plate 105 to arrange the lower occlusal platform 102, and saliva bins 103 are arranged on both sides of the groove; a saliva outlet 104 is arranged in the middle of the saliva bin 103; a limit rotating shaft 101 is arranged on the outer side of the lower connecting shaft 106 The rotation shaft 101 is rotatably connected to the connecting ring 3023; the upper end opening of the saliva bin 103 close to the lower occlusal table 102 collects saliva, and the bottoms of both sides of the saliva bin 103 are inclined toward the middle saliva discharge outlet 104; the upper support 2 includes an upper support plate 201, an upper connecting shaft 202, and an upper occlusal table 203; upper connecting shafts 202 are arranged at both ends of the upper support plate 201, and an upper occlusal table 203 is arranged in the middle of the upper support plate 201; the upper connecting shaft 202 is fixedly connected to the fixed shaft 304;

[0036] In this embodiment, when the device is in use, the upper occlusal table 203 and the lower occlusal table 102 are placed on the patient's teeth respectively, and the grooves are used to limit them, thereby improving the stability of the device. At the same time, the angle of the device can be adjusted by the adjustment device 3, thereby improving the stability and accuracy of the inspection.

[0037] In this embodiment, by fixing the patient's oral opening angle, the motion blur caused by the patient's poor autonomous compliance is reduced, thereby improving the quality of magnetic resonance imaging. The oral opening angle can be adjusted by the adjustment device 3 to adapt to the conditions of different patients' teeth, thereby improving the versatility and applicability of the device.

[0038] In this embodiment, the saliva chamber 103 can collect saliva to prevent saliva from flowing into the throat and causing discomfort or choking, thereby improving the overall comfort of the patient. The accumulation of liquid may affect the quality of magnetic resonance imaging, especially imaging in the temporomandibular joint area. By collecting saliva, this interference can be reduced and the accuracy of the examination can be improved;

[0039] In summary, the present invention connects the lower support plate 105 and the upper support plate 201 by designing a fixed shaft 304, so that the ends of the lower support 1 and the upper support 2 are coaxially connected, thereby improving the stability of the device, and the lower support 1 and the upper support 2 are connected only at the two ends, and the middle is in a hollow state, so as to prevent the device from entering the patient's oral cavity when in use and causing discomfort to the patient, and by arranging a saliva chamber 103 in the lower support 1, the saliva generated by the patient during the examination is collected, and after the collection is completed, the saliva is discharged through the saliva discharge port 104, thereby improving the comfort of the patient's examination;

[0040] At the same time, by arranging the adjustment device 3 at the connection between the lower support 1 and the upper support 2, the upper support 2 is driven to rotate by rotating the knob 306 during the magnetic resonance examination. After the adjustment is completed, the limiting tooth 301 is clamped by the blocking piece 3022 to prevent the limiting tooth 301 from flipping, thereby locking the device. When the device needs to reduce the opening angle, the knobs 306 on both sides are pressed at the same time to make the limiting tooth 301 disengage from the blocking piece 3022, thereby resetting the device; thereby improving the stability and operational convenience of the device.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A magnetic resonance imaging auxiliary fixation device for the temporomandibular joint, characterized in that: include: Lower support, upper support, adjusting device; The lower support is rotatably connected to the upper support; An adjusting device is provided at the end of the upper support; The adjusting device comprises: a limit table, a limit plate, a reset table, a fixed shaft, a reset spring, and a knob; The fixed shaft is fixedly connected to the upper supporter, a round hole is provided inside the fixed shaft to set a reset spring; a limit platform is provided at the front end of the reset spring; a reset platform is provided at the front end of the limit platform, and a knob is provided at the front end of the reset platform; the limit plate is rotatably connected to the lower supporter.

2. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 1, characterized in that: The limiting platform is provided with limiting teeth, and the diameter of the top of the limiting teeth is slightly smaller than the inner diameter of the circular hole of the fixed shaft, and the diameter of the root of the limiting teeth is larger than the diameter of the reset platform.

3. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 1, characterized in that: The limiting piece is divided into a paddle, a baffle, and a connecting ring; the connecting ring is rotatably connected to the lower support, and a paddle is arranged on one side of the connecting ring, and a baffle is arranged on the other side.

4. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 1, characterized in that: The limiting teeth are arranged at the front end of the limiting platform, and a positioning shaft is arranged at the rear end of the limiting platform to be slidably connected to the fixed shaft.

5. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 1, characterized in that: The lower support device includes a limiting rotating shaft, a lower occlusal platform, a saliva bin, a saliva discharge outlet, a lower supporting plate, and a lower connecting shaft; lower connecting shafts are rotatably connected to fixed shafts at both ends of the lower supporting plate, a groove is provided in the middle of the lower supporting plate to arrange the lower occlusal platform, and saliva bins are arranged on both sides of the groove; a saliva discharge outlet is arranged in the middle of the saliva bin; a limiting rotating shaft is rotatably connected to a connecting ring at the outer side of the lower connecting shaft.

6. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 5, characterized in that: The saliva bin is opened at the upper end of one side close to the lower occlusal table to collect saliva, and the bottoms of both sides of the saliva bin are inclined toward the middle saliva discharge outlet.

7. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 1, characterized in that: The upper support comprises an upper support plate, an upper connecting shaft, and an upper occlusal platform; upper connecting shafts are arranged at both ends of the upper support plate, and an upper occlusal platform is arranged in the middle of the upper support plate; the upper connecting shaft is fixedly connected to the fixed shaft.

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