CN112244745A

CN112244745A - Stable anti-damage oral repair supporting device and adjusting method thereof

Info

Publication number: CN112244745A
Application number: CN202011279097.6A
Authority: CN
Inventors: 李景
Original assignee: Rushan People's Hospital
Current assignee: Rushan People's Hospital
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-01-22
Anticipated expiration: 2040-11-16
Also published as: CN112244745B

Abstract

The invention discloses a stable anti-damage oral repair supporting device and an adjusting method thereof, and relates to the technical field of medical instruments. The stable injury-preventing oral restoration supporting device and the adjusting method thereof have the advantages that the two sliding sleeves I and the two sliding sleeves II are arranged on the upper tooth supporting ring and the lower tooth supporting ring in a sliding mode respectively, the two sliding sleeves I and the two sliding sleeves II can slide on the upper tooth supporting ring and the lower tooth supporting ring respectively, then the two upper tooth sockets on the upper side and the two lower tooth sockets on the lower side can be driven to slide on the upper tooth supporting ring and the lower tooth supporting ring respectively, the upper tooth sockets and the lower tooth sockets can be butted at different positions of teeth on the upper side and the lower side in the oral cavity, the upper tooth sockets and the lower tooth sockets can be prevented from wrapping the whole teeth, and operation by a doctor is facilitated.

Description

Stable anti-damage oral repair supporting device and adjusting method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a stable anti-injury oral repair supporting device and an adjusting method thereof.

Background

The oral cavity is the initial part of the digestive tract, which is communicated with the outside through the cleft mouth and then is continued with the pharynx through the isthmus. There are organs such as teeth and tongue in the oral cavity. The front wall of the oral cavity is lip, the side wall is cheek, the top is palate, the bottom of the oral cavity is mucous membrane and muscle.

Among the current oral cavity restoration strutting arrangement, basically all be the handle formula device that compresses tightly of manual operation, a structure is simple, it is also more troublesome at the in-process of inspection, the most setting as an organic whole of alveolus, can wrap up whole tooth, the doctor of being not convenient for operates, because everyone's tooth is arranged differently, the alveolus of integrative setting can not be applicable to everyone's oral cavity, strutting arrangement supports the back with the oral cavity simultaneously, patient's oral cavity wall can contact with lower gum, be unfavorable for doctor's diagnosis and treatment equally, it provides the trouble to restore for doctor's inspection.

Therefore, a need exists for a stable atraumatic oral restoration support device and method of adjusting the same to address the above-mentioned problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a stable anti-damage oral restoration supporting device and an adjusting method thereof, and solves the problems that most of tooth sockets of the existing oral restoration supporting device are integrally arranged, the whole teeth can be wrapped, the operation by doctors is inconvenient, the tooth arrangement of each person is different, the integrally arranged tooth sockets cannot be suitable for the oral cavity of each person, and after the supporting device supports the oral cavity, the oral cavity wall of a patient can be in contact with the lower gum, and the diagnosis and treatment of the doctors are also not facilitated.

(II) technical scheme

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a stable anti-damage oral cavity repairing supporting device comprises an upper tooth supporting ring and a lower tooth supporting ring, wherein the rear ends of the left side and the right side of the upper tooth supporting ring and the lower tooth supporting ring are hinged with two H-shaped connecting blocks, the upper tooth supporting ring is sleeved with two first sliding sleeves, the lower tooth supporting ring is sleeved with two second sliding sleeves, the top ends of the two first sliding sleeves are fixedly provided with upper tooth sockets, the bottom ends of the two second sliding sleeves are fixedly provided with lower pressing grooves, the front ends of the upper tooth supporting ring and the lower tooth supporting ring are fixedly provided with supporting rods, the opposite sides of the front ends of the two supporting rods are fixedly provided with two hinge seats, a threaded rod is hinged between the upper two hinge seats and between the lower two hinge seats, the opposite ends of the upper threaded rod and the lower threaded rod are respectively in threaded connection with the upper end and the lower end of the first threaded cylinder, and the front side walls of the two H-shaped connecting blocks are, the front ends of the two inclined rods are respectively fixedly connected with the rear side walls at the two ends of the hollow rod, the left side and the right side of the front end of the hollow rod are respectively fixedly provided with a connecting rod, the front ends of the two connecting rods are respectively fixedly provided with a bearing I, a threaded cylinder II is respectively fixedly arranged in the two bearing I, the opposite ends of the two threaded cylinders II are respectively fixedly provided with a bevel gear I, the back ends of the two threaded cylinders II are respectively in threaded connection with a threaded column, the back ends of the two threaded columns are respectively fixedly connected with a curved bar, the back ends of the two curved bars are respectively fixedly provided with an elliptical block, the rear side walls of the two curved bars are respectively and fixedly connected with an L-shaped rod, the other ends of the two L-shaped rods at the left side and the right side are respectively in sliding connection with the left side and the right side of the hollow rod, the hollow rod is provided with a, and a second bevel gear is fixedly arranged on one side of the rotating shaft close to the back, and a rotating block is fixedly arranged at the front end of the rotating shaft.

Preferably, arc chutes are formed in the upper tooth support ring and the lower tooth support ring, arc sliding plates are fixedly arranged in the first sliding sleeve and the second sliding sleeve, and the arc sliding plates are arranged in the arc chutes in a sliding manner.

Preferably, the opposite sides of the two connecting rods are fixedly provided with limiting rods, the opposite ends of the two limiting rods are provided with arc-shaped grooves, and the arc-shaped grooves are matched with the rotating shaft.

Preferably, the two first bevel gears are matched with the bevel gears.

Preferably, the upper tooth socket, the lower pressing groove and the oval block are all made of silica gel.

Preferably, the foremost end of the rotating block is positioned at the rear side of the first threaded cylinder.

A stable anti-injury oral repair support device and an adjustment method thereof comprise the following steps:

s1, when in use, the first sliding sleeve and the second sliding sleeve are slid on the upper tooth support ring or the lower tooth support ring according to the position required for restoring the oral cavity of the patient, so that the first sliding sleeve and the second sliding sleeve are staggered with the position required for restoring the oral cavity, and simultaneously the first sliding sleeve and the second sliding sleeve are slid to proper positions on the upper tooth support ring or the lower tooth support ring, so that the upper tooth socket and the lower tooth socket are matched with the teeth of the patient;

s2, if the left oral cavity of the patient needs to be diagnosed and treated at the moment, the rotating shaft can be moved to the left side, the hollow sliding sleeve can rotate to the left side on the hollow rod at the moment, then the bevel gear II can be meshed with the bevel gear I at the left side, then the rotating shaft is driven to rotate through the rotating block, the bevel gear II can be meshed with the bevel gear I at the moment to drive the thread cylinder II to rotate, the thread column can slide out of the thread cylinder II, then the elliptic block is driven to move towards the outside through the curved rod, the support of the elliptic block on the inner wall of the oral cavity of the patient is realized, the contact between the inner wall of the oral.

(III) advantageous effects

The invention has the beneficial effects that:

1. the stable injury-preventing oral restoration supporting device and the adjusting method thereof can lead the two sliding sleeves I and the two sliding sleeves II to respectively slide on the upper tooth supporting ring and the lower tooth supporting ring through the two sliding sleeves I and the two sliding sleeves II which are arranged to respectively slide on the upper tooth supporting ring and the lower tooth supporting ring, further can drive the two upper tooth sockets on the upper side and the two lower tooth sockets on the lower side to respectively slide on the upper tooth supporting ring and the lower tooth supporting ring, thereby realizing that the upper tooth sockets and the lower tooth sockets can be butted with different positions of teeth on the upper side and the lower side in the oral cavity, avoiding the upper tooth sockets and the lower tooth sockets from wrapping the whole teeth, being more convenient for doctors to operate, simultaneously, being capable of adjusting the positions of the upper tooth sockets and the lower tooth sockets, further being capable of moving the upper tooth sockets and the lower tooth sockets according to the tooth arrangement of patients, leading the upper tooth sockets and the lower tooth sockets to be more fit with the teeth of the patients, improving the comfort of the patients and being more convenient, the efficiency of diagnosing that can improve the doctor.

2. The stable anti-damage oral restoration supporting device and the adjusting method thereof are characterized in that a pair of threaded cylinders II are supported by bearings, rotating shafts which can move left and right are arranged, the bevel gears II can be meshed with bevel gears I on the left side or the right side by moving the rotating shafts left and right, then the bevel gears II are driven to rotate by rotating the rotating shafts, the bevel gears II can be meshed with the bevel gears I to drive the threaded cylinders II to rotate, threaded columns can slide out of the threaded cylinders II, then the elliptic blocks are driven to move outwards by curved bars, the support of the elliptic blocks on the inner wall of the oral cavity of a patient is realized, the contact between the inner wall of the oral cavity and a lower dental bed can be avoided, diagnosis and treatment on the dental bed or the inner wall of the oral cavity of the patient by a doctor are facilitated, the trouble in.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic top view of a hollow pole according to the present invention;

FIG. 3 is a schematic perspective view of a second sliding sleeve according to the present invention;

FIG. 4 is a schematic view of a front cross-sectional view of a stop lever according to the present invention.

In the figure: 1 upper tooth support ring, 2 lower tooth support ring, 3H-shaped connecting block, 4 sliding sleeve I, 5 sliding sleeve II, 6 upper tooth socket, 7 lower tooth socket, 8 arc chute, 9 arc slide plate, 10 support rod, 11 threaded rod, 12 threaded cylinder I, 13 hinged seat, 14 diagonal rod, 15 hollow rod, 16 connecting rod, 17 bearing I, 18 threaded cylinder II, 19 bevel gear I, 20 threaded column, 21 curved rod, 22 oval block, 23L-shaped rod, 24 hollow sliding sleeve, 25 bearing II, 26 rotating shaft, 27 bevel gear II, 28 rotating block, 29 limiting rod, 30 arc chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a technical solution: a stable anti-damage oral cavity repairing supporting device comprises an upper tooth supporting ring 1 and a lower tooth supporting ring 2, wherein the upper tooth supporting ring 1 and the lower tooth supporting ring 2 are supporting frameworks of the supporting device, the upper tooth grooves 6 and the lower pressing grooves 7 which are arranged on the upper tooth supporting ring 1 and the lower tooth supporting ring 2 can be in socket joint with teeth of a patient, so that the oral cavity of the patient can be supported by the front side between the upper tooth supporting ring 1 and the lower tooth supporting ring 2, the rear ends of the left side and the right side of the upper tooth supporting ring 1 and the lower tooth supporting ring 2 are hinged with two H-shaped connecting blocks 3, the two H-shaped connecting blocks 3 play a connecting role in connecting the two ends of the rear side of the upper tooth supporting ring 1 and the lower tooth supporting ring 2, so that the front side between the upper tooth supporting ring 1 and the lower tooth supporting ring 2 can be far away from or close to each other, the upper tooth supporting ring 1 is sleeved with two sliding sleeves 4, and the lower tooth supporting ring 2 is sleeved with two sliding sleeves 5, the top ends of the two sliding sleeves I4 are fixedly provided with upper tooth sockets 6, the bottom ends of the two sliding sleeves II 5 are fixedly provided with lower pressing grooves 7, the two sliding sleeves I4 and the two sliding sleeves II 5 are respectively arranged on the upper tooth support ring 1 and the lower tooth support ring 2 in a sliding way, so that the two sliding sleeves I4 and the two sliding sleeves II 5 can respectively slide on the upper tooth support ring 1 and the lower tooth support ring 2, and further can drive the two upper tooth sockets 6 at the upper side and the two lower tooth sockets 7 at the lower side to respectively slide on the upper tooth support ring 1 and the lower tooth support ring 2, thereby realizing the butt joint of the upper tooth socket 6 and the lower tooth socket 7 on different positions of the upper and lower teeth in the oral cavity, avoiding the upper tooth socket and the lower tooth socket from wrapping up the whole teeth, being more convenient for doctors to operate, enabling the inner wall of the oral cavity to be contacted with the lower dental bed, being beneficial for doctors to diagnose and treat the inner wall of the patient's dental bed or the oral cavity, and the like, the front ends of the upper, two hinged seats 13 are fixedly arranged on the opposite sides of the front ends of two support rods 10, threaded rods 11 are hinged between the two hinged seats 13 on the upper side and between the two hinged seats 13 on the lower side, the opposite ends of the two threaded rods 11 on the upper side and the lower side are respectively in threaded connection with the upper end and the lower end of a threaded cylinder I12, the two threaded rods 11 can slide out of the threaded cylinder I12 by rotating the threaded cylinder I12, the front ends of an upper tooth support ring 1 and a lower tooth support ring 2 can be supported and opened, so that the oral cavity of a patient can be opened, the front side walls of two H-shaped connecting blocks 3 are respectively and fixedly provided with inclined rods 14, the two inclined rods 14 play a role in supporting and fixing a hollow rod 15, the front ends of the two inclined rods 14 are respectively and fixedly connected with the rear side walls at the two ends of the hollow rod 15, the hollow rod 15 plays a role in supporting a bearing I17 through a connecting rod 16, and can play a role, the left side and the right side of the front end of the hollow rod 15 are both fixedly provided with connecting rods 16, the front ends of the two connecting rods 16 are both fixedly provided with a bearing I17, a thread cylinder II 18 is both fixedly arranged in the bearing I17, the opposite ends of the thread cylinders II 18 are both fixedly provided with a bevel gear I19, the back ends of the thread cylinders II 18 are both in threaded connection with thread columns 20, the back ends of the thread columns 20 are both fixedly connected with curved rods 21, the oval blocks 22 can slide outwards in an inclined state through the arranged curved rods 21, the oval blocks 22 can be contacted with the inner wall of the oral cavity of a patient to support the inner wall of the oral cavity, the back ends of the two curved rods 21 are both fixedly provided with oval blocks 22, the back side walls of the two curved rods 21 are both fixedly connected with L-shaped rods 23, the other ends of the two L-shaped rods 23 on the left side and the right side are respectively in sliding connection with the left side and the right side of the hollow rod 15, and are, the device can limit the curved bar 21, can limit the threaded column 20 by limiting the curved bar 21, further can slide out or slide in the threaded column 20 from the threaded cylinder II 18 when the threaded cylinder II 18 rotates, can realize the left-right movement of the elliptical block 22, is provided with a hollow sliding sleeve 24 in a sliding way on the hollow rod 15, the front side wall of the hollow sliding sleeve 24 is fixedly provided with a rotating shaft 26 through a bearing II 25, the rear side of the rotating shaft 26 is fixedly provided with a bevel gear II 27, the front end of the rotating shaft 26 is fixedly provided with a rotating block 28, the rotating block 29 can drive the rotating shaft 26 to rotate, the bevel gear II 27 is meshed with the bevel gear I19 to drive the threaded cylinder II 18 to rotate, the threaded column 20 can slide out from the threaded cylinder II 18, then the curved bar 21 drives the elliptical block 22 to move outwards, realizes that the elliptical block 22 supports the oral cavity of a patient, and can avoid the contact of the inner wall of the oral cavity with, the medical examination and treatment of the gum or the inner wall of the oral cavity of the patient by the doctor are facilitated, the trouble in examination and repair of the doctor can be avoided, and the examination and repair efficiency of the doctor is improved.

Go up and all seted up arc spout 8 on tooth support ring 1 and the lower tooth support ring 2, all fixedly in sliding sleeve one 4 and the sliding sleeve two 5 be provided with arc slide 9, and arc slide 9 slides and sets up in arc spout 8, through the sliding connection of the arc spout 8 of seting up and arc slide 9, can play limiting displacement to sliding sleeve one 4 and sliding sleeve two 5 respectively on last tooth support ring 1 and lower tooth support ring 2, can avoid sliding sleeve one 4 and sliding sleeve two 5 to take place to rotate on last tooth support ring 1 and lower tooth support ring 2.

The opposite sides of two connecting rods 16 all are fixed and are provided with gag lever post 29, arc wall 30 has all been seted up to the looks remote site of two gag lever posts 29, and arc wall 30 and rotation axis 26 looks adaptation, through the arc wall 30 of seting up on gag lever post 29, when bevel gear second 27 on the rotation axis 26 and left side or right side bevel gear 19 meshing, rotation axis 26 just can slide in the arc wall 30 this moment, can play the supporting role to rotation axis 26, and the convenience is rotatory to rotation axis 26.

The two first bevel gears 19 are matched with the second bevel gears 27, and the first bevel gears 19 are matched with the second bevel gears 27, so that the second bevel gears 27 can be meshed with the first bevel gears 19 on the left side and the right side when moving left or right.

Go up alveolus 6, push down groove 7 and oval piece 22 and be the silica gel material setting, adopt the silica gel material through going up alveolus 6, push down groove 7 and oval piece 22, can play fine guard action to patient's oral cavity, reduce patient's misery.

The foremost end of the rotating block 28 is located at the rear side of the first threaded cylinder 12, and the rotating block 28 is used for enabling the rotating shaft 26 to move left and right, so that the rotating block 28 at the front end is prevented from contacting the first threaded cylinder 12 when the rotating shaft 26 moves left and right, and the structural integrity and reasonability are guaranteed.

The method comprises the following operation steps:

s1, when the dental prosthesis is used, the first sliding sleeve 4 and the second sliding sleeve 5 are slid on the upper tooth support ring 1 or the lower tooth support ring 2 according to the position of the dental prosthesis, so that the first sliding sleeve 4 and the second sliding sleeve 5 are staggered with the position of the dental prosthesis, the first sliding sleeve 4 and the second sliding sleeve 5 are slid to a proper position on the upper tooth support ring 1 or the lower tooth support ring 2, the upper tooth socket 6 and the lower tooth socket 7 are matched with teeth of a patient, then the support device can be placed in the oral cavity of the patient, so that upper teeth of the patient are occluded into the two upper tooth sockets 6, lower teeth are occluded into the lower tooth socket 7, and then the two threaded rods 11 are both slid out of the first threaded cylinder 12 by rotating the first threaded cylinder 12, so that the front ends of the upper tooth support ring 1 and the lower tooth support ring 2 are supported and opened, and the oral cavity of the patient is expanded;

s2, if the left oral cavity of the patient needs to be diagnosed, the rotating shaft 26 can be moved to the left, the hollow sliding sleeve 24 can rotate to the left on the hollow rod 15, the bevel gear II 27 can be meshed with the left bevel gear I19, the rotating block 29 drives the rotating shaft 26 to rotate, the bevel gear II 27 is meshed with the bevel gear I19 to drive the threaded cylinder II 18 to rotate, the threaded column 20 can slide out of the threaded cylinder II 18, the curved rod 21 drives the elliptical block 22 to move to the outside, the elliptical block 22 is supported on the inner wall of the oral cavity of the patient, the inner wall of the oral cavity can be prevented from contacting with a lower dental bed, and the doctor can conveniently conduct diagnosis and treatment.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a stable damage prevention oral cavity restoration strutting arrangement, includes upper teeth support ring (1) and lower teeth support ring (2), its characterized in that: the rear ends of the left side and the right side of the upper tooth support ring (1) and the lower tooth support ring (2) are hinged with two H-shaped connecting blocks (3), the upper tooth support ring (1) is sleeved with two sliding sleeves (4), the lower tooth support ring (2) is sleeved with two sliding sleeves (5), the top ends of the two sliding sleeves (4) are fixedly provided with upper tooth grooves (6), the bottom ends of the two sliding sleeves (5) are fixedly provided with lower pressing grooves (7), the front ends of the upper tooth support ring (1) and the lower tooth support ring (2) are fixedly provided with supporting rods (10), the opposite sides of the front ends of the two supporting rods (10) are fixedly provided with two hinge seats (13), the upper side of the two hinge seats (13) and the lower side of the two hinge seats (13) are hinged with threaded rods (11), the opposite ends of the upper side and the lower side of the two threaded rods (11) are respectively in threaded connection with the upper end and the lower end of a first threaded cylinder (12), inclined rods (14) are fixedly arranged on the front side walls of the two H-shaped connecting blocks (3), the front ends of the two inclined rods (14) are fixedly connected with the rear side walls at the two ends of a hollow rod (15) respectively, connecting rods (16) are fixedly arranged on the left and right sides of the front end of the hollow rod (15), bearings (17) are fixedly arranged at the front ends of the two connecting rods (16), threaded cylinders (18) are fixedly arranged in the bearings (17), bevel gears (19) are fixedly arranged at the opposite ends of the two threaded cylinders (18), threaded columns (20) are in threaded connection with the opposite ends of the two threaded columns (18), curved rods (21) are fixedly connected with the opposite ends of the two threaded columns (20), elliptical blocks (22) are fixedly arranged at the opposite ends of the two curved rods (21), and L-shaped rods (23) are fixedly connected with the rear side walls of the two curved rods (21), the other end of the L-shaped rod (23) is connected with the left side and the right side of the hollow rod (15) in a sliding mode, a hollow sliding sleeve (24) is arranged on the hollow rod (15) in a sliding mode, a rotating shaft (26) is fixedly arranged on the front side wall of the hollow sliding sleeve (24) through a second bearing (25), a second bevel gear (27) is fixedly arranged on the upper portion, close to the rear side, of the rotating shaft (26), and a rotating block (28) is fixedly arranged at the front end of the rotating shaft (26).

2. The stable atraumatic prosthodontic support of claim 1, wherein: go up tooth support ring (1) and all seted up arc spout (8) on lower tooth support ring (2), equal fixed arc slide (9) that are provided with in sliding sleeve (4) and sliding sleeve two (5), and arc slide (9) slide and set up in arc spout (8).

3. The stable atraumatic prosthodontic support of claim 1, wherein: limiting rods (29) are fixedly arranged on the opposite sides of the two connecting rods (16), arc-shaped grooves (30) are formed in the opposite ends of the two limiting rods (29), and the arc-shaped grooves (30) are matched with the rotating shaft (26).

4. The stable atraumatic prosthodontic support of claim 1, wherein: the two first bevel gears (19) are matched with the second bevel gear (27).

5. The stable atraumatic prosthodontic support of claim 1, wherein: the upper tooth socket (6), the lower pressing socket (7) and the elliptical block (22) are all made of silica gel.

6. The stable atraumatic prosthodontic support of claim 1, wherein: the foremost end of the rotating block (28) is positioned at the rear side of the first threaded cylinder (12).

7. A method of adjusting a stable atraumatic oral prosthetic support device, comprising the steps of:

s1, when in use, the sliding sleeve I (4) and the sliding sleeve II (5) are slid on the upper tooth support ring (1) or the lower tooth support ring (2) according to the position required for restoring the oral cavity of a patient, so that the sliding sleeve I (4) and the sliding sleeve II (5) are staggered with the position for restoring the oral cavity, and simultaneously, the sliding sleeve I (4) and the sliding sleeve II (5) are slid to a proper position on the upper tooth support ring (1) or the lower tooth support ring (2), so that the upper tooth sockets (6) and the lower tooth sockets (7) are matched with the teeth of the patient, then the supporting device can be put into the oral cavity of the patient, so that the upper teeth of the patient are occluded in the two upper tooth sockets (6), the lower teeth are occluded in the lower tooth sockets (7), then the two threaded rods (11) are both slid out of the threaded cylinders (12) by rotating the threaded cylinders (12), and the front ends of the upper tooth support ring (1) and the lower tooth support ring (2) are supported, the oral cavity of the patient is expanded;

s2, if the left oral cavity of the patient needs to be diagnosed, the rotating shaft (26) can be moved to the left, the hollow sliding sleeve (24) can rotate to the left on the hollow rod (15), then the bevel gear II (27) can be meshed with the left bevel gear I (19), then the rotating block (29) drives the rotating shaft (26) to rotate, the bevel gear II (27) is meshed with the bevel gear I (19) to drive the threaded cylinder II (18) to rotate, the threaded column (20) can slide out of the threaded cylinder II (18), and then the curved rod (21) drives the elliptical block (22) to move outwards, so that the elliptical block (22) supports the inner wall of the oral cavity of the patient, the contact between the inner wall of the oral cavity and a lower dental bed can be avoided, and the doctor can conveniently conduct diagnosis and treatment.