Auxiliary fixation device for magnetic resonance examination of temporomandibular joint

Abstract

The application discloses a kind of magnetic resonance examination temporomandibular joint auxiliary fixing device, comprising: lower support, upper support, adjusting device;The lower support is rotatably connected with the upper support;The upper support end is provided with adjusting device;The adjusting device includes: limiting table, limiting sheet, reset table, fixed shaft, reset spring, knob;The fixed shaft is fixedly connected with the upper support, and a round hole is formed in the fixed shaft to set the reset spring;The front end of the reset spring is provided with the limiting table and is slidably connected with the fixed shaft;The front end of the limiting table is provided with the reset table, and the front end of the reset table is provided with the knob;The limiting sheet is rotatably connected with the lower support;When magnetic resonance examination is carried out, the upper support is rotated by rotating the knob, and after adjustment is completed, the limiting tooth is clamped by the blocking piece, to prevent the limiting tooth from turning over, so as to lock the device.

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 imaging. Background Art

[0002] Temporomandibular joint disorder syndrome is a term that covers 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 this syndrome are diverse and may include internal and external trauma to the joint, psychosocial stress and poor oral habits; temporomandibular joint disorder syndrome is more common in young and middle-aged women between the ages of 20 and 40, but may also affect adolescents; types of this syndrome include muscle disorders, joint structure disorders, inflammatory diseases and bone and joint diseases; common symptoms include pain, difficulty chewing, joint clicking, etc.; currently, MRI examinations take 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 for the patient to bite during the examination, fix the angle of the patient's mouth opening, open the temporomandibular joint, and keep it still;

[0003] According to a patent publication numbered CN113940657B, a dynamic MRI examination device for the temporomandibular joint is disclosed. The cited document states that the upper brace is slidably connected to one side of the lower brace via a fixed shaft, a rotating sleeve, a support rod, a connecting shaft, a connecting plate, a slider, and a snap-on strip. The device is used for dynamic MRI examination to determine whether there are abnormalities in the position of the glenoid fossa, articular disc, and condyle during the mouth opening and closing process, thereby helping the patient to open and close their mouth evenly.

[0004] In actual use, the cited document still has certain defects. 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. When facing patients who are not suitable for the device, 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 opens his mouth 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 imaging. The device comprises an upper supporter and a lower supporter, and a connecting shaft is provided at the end of each supporter. The upper supporter and the lower supporter are connected by a fixed shaft to ensure the stability of the device during use. At the same time, a limit platform is provided at the front end of the fixed shaft, and a 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 chamber 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 through the following technical solutions: an auxiliary fixation device for magnetic resonance imaging 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 includes: a limit platform, a limit plate, a reset platform, a fixed shaft, a reset spring, and a knob; the fixed shaft is fixedly connected to the upper support, a circular hole is provided inside the fixed shaft to accommodate the 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 support;

[0009] Furthermore, the limiting platform is provided with limiting teeth, and the diameter of the limiting teeth top is slightly smaller than the inner diameter of the fixed shaft circular hole, and the diameter of the limiting teeth root 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 the paddle is provided on one side of the connecting ring and the baffle is provided 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 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 provide the lower occlusal platform, and saliva bins are provided on both sides of the groove; a saliva discharge outlet is provided in the middle of the saliva bin; a limit rotating shaft is provided on the outer side of the lower connecting shaft to rotatably connect the connecting ring;

[0013] Furthermore, the saliva bin is opened at the upper end near the lower occlusal table to collect saliva, and the bottoms on both sides of the saliva bin are inclined toward the middle saliva outlet;

[0014] Furthermore, the upper support includes an upper support plate, an upper connecting shaft, and an upper occlusal platform; upper connecting shafts are provided at both ends of the upper support plate, and an upper occlusal platform is provided 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. In addition, the lower support and the upper support are only connected at the two ends, and the middle is in a hollow state, which prevents the device from entering the patient's mouth during use and causing discomfort to the patient. A saliva chamber is provided in the lower support to collect saliva produced by the patient during the examination, and after collection, it is discharged through the saliva discharge port, thereby improving the patient's examination comfort.

[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 disengage the limit teeth from the baffle restriction, thereby resetting the device; the stability and operational convenience of the device 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 following briefly introduces the drawings required for describing the embodiments.

[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 during magnetic resonance imaging;

[0021] Figure 3 The present invention is a schematic structural diagram of an adjustment device for an auxiliary fixation device for a magnetic resonance imaging examination of a temporomandibular joint;

[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 for a temporomandibular joint auxiliary fixation device for magnetic resonance imaging;

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

[0025] In the accompanying drawings, the components represented by the reference numerals are 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 present invention discloses an auxiliary fixation device for the temporomandibular joint during magnetic resonance imaging, 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 provided 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, a circular hole is provided inside the fixed shaft 304 to set the reset spring 305; a limit platform 307 is provided at the front end of the reset spring 305 and is slidably connected to the fixed shaft 304; a reset platform 303 is provided at the front end of the limit platform 307, and a knob 306 is provided 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 imaging, 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 flipping, thereby locking the device.

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 、 3The lower support 1 is rotationally connected to the upper support 2, the upper support 2 is provided with an adjusting device 3 at the end, the adjusting device 3 comprises a limiting table 307, a limiting sheet 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, a circular hole is formed in the fixed shaft 304 to accommodate the reset spring 305, the reset spring 305 is provided with the limiting table 307 at the front end, the limiting table 307 is provided with the reset table 303 at the front end, the reset table 303 is provided with the knob 306 at the front end, the limiting sheet 302 is rotationally connected to the lower support 1, the limiting table 307 is provided with a limiting tooth 301, the diameter of the top of the limiting tooth 301 is slightly smaller than the inner diameter of the circular hole of the fixed shaft 304, and the diameter of the root of the limiting tooth 301 is greater than the diameter of the reset table 303, the limiting sheet 302 is divided into a pushing sheet 3021, a blocking sheet 3022 and a connecting ring 3023, the connecting ring 3023 is rotationally connected to the lower support 1, the pushing sheet 3021 is arranged on one side of the connecting ring 3023, and the blocking sheet 3022 is arranged on the other side, the limiting tooth 301 is arranged at the front end of the limiting table 307, and the rear end of the limiting table 307 is provided with a positioning shaft which is slidingly connected to the fixed shaft 304.

[0031] In the embodiment, when the adjusting mechanism is used, the knob 306 is rotated to drive the fixed shaft 304 to rotate, the fixed shaft 304 drives the upper support 2 to rotate to adjust the angle between the upper support 2 and the lower support 1, and after the adjustment is completed, the limiting tooth 301 is clamped by the blocking sheet 3022 to prevent the upper support 2 from being reversed and to limit the upper support 2.

[0032] When the device needs to reduce the angle between the upper support 2 and the lower support 1, the two knobs 306 are pressed at the same time to compress the reset spring 305, so that the limiting table 307 and the limiting tooth 301 are inserted into the fixed shaft 304, the limiting tooth 301 is released from the blocking of the blocking sheet 3022, the position of the blocking sheet 3022 is in contact with the reset table 303, so that the upper support 2 can be rotated and reset, the knob 306 is released after the adjustment is completed, the limiting tooth 301 is re-inserted by the reset action of the spring, and if the limiting tooth 301 is clamped by the blocking sheet 3022 after the insertion, the pushing sheet 3021 can be adjusted.

[0033] In the embodiment, the adjusting mechanism connects the upper support 2 and the lower support 1 through the fixed shaft 304, ensures the stability of the device during use, and prevents horizontal displacement of the device during use. The angle after adjustment can be locked through the cooperation of the limiting teeth 301 and the blocking piece 3022, preventing displacement of the device during the examination process. Meanwhile, by pressing the knob 306, the limiting teeth 301 can be released from the limitation of the blocking piece 3022, realizing the quick resetting of the device and improving the use convenience of the device. Meanwhile, the device is designed in a hollow state in the middle, avoiding the device from entering the patient's oral cavity and reducing the discomfort of the patient. The problems of poor stability and poor applicability of the device due to the lack of fixed connection points between the upper and lower dental sets in the cited document are solved.

[0034] Embodiment 2

[0035] As shown in Figure 1 , 2 , 4, 6, the lower support 1 comprises a limiting rotating shaft 101, a lower occlusal table 102, a saliva bin 103, a saliva discharge port 104, a lower support plate 105, and a lower connecting shaft 106. The lower connecting shaft 106 at both ends of the lower support plate 105 is rotationally connected to the fixed shaft 304. The lower support plate 105 has a groove in the middle, and the lower occlusal table 102 is arranged in the groove. The saliva bin 103 is arranged on both sides of the groove. The saliva bin 103 has a saliva discharge port 104 in the middle. The limiting rotating shaft 101 is arranged outside the lower connecting shaft 106 and rotationally connected to the connecting ring 3023. The saliva bin 103 is open at the upper end on the side close to the lower occlusal table 102 to collect saliva, and the bottoms of the two sides of the saliva bin 103 are inclined towards the middle of the saliva discharge port 104. The upper support 2 comprises an upper support plate 201, an upper connecting shaft 202, and an upper occlusal table 203. The upper connecting shaft 202 is arranged at both ends of the upper support plate 201. The 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 the embodiment, when the device is used, the upper occlusal table 203 and the lower occlusal table 102 are respectively placed on the patient's teeth, and are limited by the grooves to improve the stability of the device. Meanwhile, the angle of the device can be adjusted through the adjusting device 3, improving the stability and accuracy of the examination.

[0037] In the embodiment, the opening angle of the patient's oral cavity is fixed, reducing the motion blur caused by poor patient self-compliance, thereby improving the quality of magnetic resonance imaging. The opening angle of the oral cavity can be adjusted through the adjusting device 3 to adapt to different patient's teeth, improving the universality 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 coughing, thereby improving the patient's overall comfort. 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. In addition, the lower support 1 and the upper support 2 are connected only at the two ends, and the middle is in a hollow state, which prevents the device from entering the patient's mouth during use and causing discomfort to the patient. By providing a saliva chamber 103 in the lower support 1, the saliva produced by the patient during the examination is collected and discharged through the saliva discharge port 104 after collection, thereby improving the patient's examination comfort.

[0040] At the same time, by arranging an 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 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 over, 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 illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A device for auxiliary fixation of the temporomandibular joint for magnetic resonance imaging, characterized in that: include: Lower support, upper support, adjustment 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 includes: a limiting platform, a limiting plate, a reset platform, a fixed shaft, a reset spring, and a knob; The fixed shaft is fixedly connected to the upper support, a circular hole is provided inside the fixed shaft to accommodate 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 piece is rotatably connected to the lower support; The lower support device includes a limit 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 set the lower occlusal platform, and saliva bins are provided on both sides of the groove; a saliva discharge outlet is provided in the middle of the saliva bin; a limit rotating shaft is provided on the outer side of the lower connecting shaft to rotate and connect the connecting ring; The saliva bin is open at the upper end near the lower occlusal table to collect saliva, and the bottoms on both sides of the saliva bin are inclined toward the middle saliva outlet; The upper supporter includes an upper support plate, an upper connecting shaft, and an upper occlusal platform; upper connecting shafts are provided at both ends of the upper support plate, and an upper occlusal platform is provided in the middle of the upper support plate; the upper connecting shaft is fixedly connected to the fixed shaft.

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 tooth 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 tooth 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 supporter, and the paddle is arranged on one side of the connecting ring, and the baffle is arranged on the other side.

4. The auxiliary fixation device for MRI examination of temporomandibular joint according to claim 2, 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.

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