Protective mouth gag for dental prosthetics

Abstract

This invention discloses a protective oral retractor for dental restoration, comprising a lower retractor mold, an upper retractor mold, a rotating rod, an air sac, and a collection bag. The rotating rod is bearing-connected inside the lower retractor mold and extends into the lower retractor mold, where it is connected to a set of gears of a bevel gear assembly. Gear keys meshing on the other two sides of the bevel gear assembly are connected to the center of the threaded rotating rod. The bottom of the movable sleeve is fixed. This protective oral retractor for dental restoration, equipped with a rotating rod, allows for the processing of saliva in the patient's mouth. When the rotating rod is rotated, the rotating groove drives the fitting block to move back and forth within the limiting groove via a limiting block. At this time, the piston block also adsorbs one side of the suction port, allowing the saliva to flow into the delivery tube and then into the collection bag.

Description

Technical Field

[0001] This invention relates to the field of oral retractors, specifically a protective oral retractor for dental restoration. Background Technology

[0002] Nowadays, with improved dietary conditions, the incidence of oral diseases is increasing, necessitating oral treatment and restoration. During oral restoration, patients need to open their mouths, thus requiring the use of oral retractors to assist medical staff in supporting the range of mouth adjustment. For example:

[0003] A protective oral retractor disclosed in CN219000618U first places two dental trays in the patient's mouth, so that the two dental trays contact the patient's upper and lower teeth respectively. Then, the support rod can be pushed to move the support rod into the support cover. At this time, with the cooperation of the fixed plate and two pull rods, the two support arms can be rotated. Under the action of the lever principle, the two dental trays can be moved away from each other, thus opening and supporting the patient's mouth.

[0004] The above document describes how the angle of the oral cavity is adjusted by using a support rod during the process. However, because the patient's mouth is always open during the adjustment, a large amount of saliva can easily accumulate in the patient's mouth. Excessive saliva can affect the repair operation of the staff. The above document lacks a structure for processing oral saliva.

[0005] Meanwhile, when repairing a patient's oral cavity, a reflector is needed to observe hidden areas of the patient's oral cavity. However, due to the temperature difference between the outside and inside the oral cavity, the reflector will fog up when it is inserted into the patient's oral cavity, thus affecting the observation and use by the staff. The above-mentioned document also lacks a structure to prevent the reflector from fogging up.

[0006] Therefore, we propose a protective oral retractor for dental restoration to address the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a protective oral retractor for dental restoration, in order to solve the problems currently found in the market as described in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a protective oral retractor for dental restoration, comprising a lower retractor mold, an upper retractor mold, a rotating rod, an air sac, and a collection bag;

[0009] The lower mold of the expander is provided above the upper mold of the expander, and a rotating rod extends from the front end of the lower mold of the expander. An air accumulator is provided on the left side of the lower mold of the expander, and a collection bag is provided on the right side of the lower mold of the expander.

[0010] The rotating rod bearing is connected inside the lower mold of the opener and extends into the lower mold of the opener. It is connected to a set of gears of the bevel gear assembly. The gear keys meshing on the other two sides of the bevel gear assembly are connected to the center of the threaded rotating rod. The other end of the threaded rotating rod is threadedly connected to a movable sleeve. A slider is fixed at the bottom of the movable sleeve. The bottom of the slider is slidably disposed inside the groove opened inside the lower mold of the opener.

[0011] A support rod is rotatably connected to the top of the movable sleeve. The other end of the support rod is rotatably connected to the top of the upper mold of the opener. A rotating groove is formed at the top of the lower mold of the opener. A fitting block is fitted to the inner side of the rotating groove. A limit block is fixed to the outer side of the fitting block. The outer side of the limit block is fitted to the inside of the limit groove. A piston block is fixed to the top of the fitting block. The outer side of the piston block is fitted to the inner wall of the liquid suction port connection end.

[0012] Preferably, the dimensions of the lower die of the expander are the same as those of the upper die of the expander, and the support rods are symmetrically distributed in two sets about the vertical center line of the lower die of the expander, so as to facilitate the adjustment of the distance between the lower die and the upper die of the expander.

[0013] Preferably, connecting rods are fixed to the inner sides of both the upper and lower molds of the expander, and the outer sides of both sets of connecting rods are slidably disposed inside the receiving rod. The upper mold of the expander forms a lifting structure with the interior of the lower mold of the expander through the support rod, thereby facilitating the sliding of the connecting rods inside the receiving rod.

[0014] Preferably, the inner wall of the rotating groove is fitted to the outer wall of the inner protrusion of the bonding block, the rotating groove is serpentine, and the outer side of the bonding block and the limiting block are integrally formed. The bonding block moves back and forth between the rotating groove and the limiting groove opened on the inner wall of the lower mold of the opener, which facilitates the piston block to move back and forth on one side of the suction port to absorb saliva.

[0015] Preferably, the outer wall of the piston block is attached to the inner wall of one side of the suction port, and the piston block forms a negative pressure adsorption structure with the inner wall of the suction port through the attachment block. This allows the piston block to move back and forth inside the suction port.

[0016] Preferably, one end of the air sac is connected to an air delivery pipe, and the other end of the air delivery pipe is connected to one end of a supporting rotating rod. The inner side of the supporting rotating rod is rotatably connected to the outer side of a fixed block. The bottom end of the fixed block is fixed to the top surface of the lower mold of the retractor. One end of the air delivery pipe extends into the supporting rotating rod and is connected to a connecting hose. The other end of the connecting hose is connected to a cavity opened in the supporting rotating rod. A movable groove is opened on the side of the cavity. One end of the movable groove is attached to the outer side of the reflector rod. Another set of connecting hoses extends into the lower mold of the retractor through the cavity and is close to the delivery pipe. One end of the delivery pipe extends out of the outer side of the lower mold of the retractor and is connected to one end of a collection bag, thereby absorbing saliva and defogging the reflector rod.

[0017] Preferably, one end of the suction port is connected to another set of connecting hoses, and the air bladder forms an adsorption effect with the saliva inside the suction port through the air delivery tube. At the same time, one end of the other set of air delivery tubes is provided with a one-way valve to prevent saliva from flowing into the interior of the air delivery tube.

[0018] Preferably, the movable slot is located inside the reflector rod, and the gas supplied by the air bladder through the air supply pipe and connecting hose passes through the cavity. The connecting hose is made of elastic hose, which facilitates the adjustment of the reflector rod to slide inside the support rod.

[0019] Preferably, the outer side of the reflector rod is slidably disposed inside the moving groove, and the collection bag and the conveying pipe are connected by a threaded seal, which facilitates the replacement of the collection bag.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This protective oral retractor for dental restoration is equipped with a rotating rod. By rotating the rotating rod, the rotating rod can drive the threaded rotating rod to rotate through the bevel gear assembly. The threaded rotating rod will drive the moving sleeve to move, so that the support rod can drive the upper mold of the retractor to adjust the height at the top of the lower mold of the retractor. In addition, when processing saliva inside the patient's mouth, when rotating the rotating rod, the rotating groove will drive the fitting block to move back and forth inside the limiting block within the limiting groove. At this time, the piston block will also adsorb one side of the suction port, and the saliva will flow into the delivery tube and be transported into the collection bag.

[0022] 2. This protective oral retractor for dental restoration is equipped with an air bladder. By squeezing the air bladder, gas is released through the air supply tube, connecting hose, and cavity. This allows the saliva inside the patient's mouth to be absorbed through the suction port. Furthermore, during use, the cavity inside the reflector rod allows gas to flow into the cavity, which rapidly cools the inside of the reflector rod. When the reflector rod is placed inside the patient's mouth, it effectively absorbs saliva and prevents fogging of the reflector rod. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This is a top view cross-sectional structural diagram of the present invention;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the rotating groove of the present invention;

[0027] Figure 5 This is an exploded cross-sectional view of the rotating groove and piston block of the present invention;

[0028] Figure 6 This is a schematic diagram of the cavity cross-sectional structure of the present invention from a top view.

[0029] Figure 7 This is a schematic diagram of the front cross-sectional structure of the reflector of the present invention.

[0030] In the diagram: 1. Lower mold of the expander; 101. Upper mold of the expander; 2. Rotating rod; 3. Bevel gear assembly; 4. Threaded rotating rod; 5. Moving sleeve; 6. Slider; 7. Slide groove; 8. Support rod; 9. Connecting rod; 10. Receiving rod; 11. Rotating groove; 12. Adhesive block; 13. Limiting block; 14. Limiting groove; 15. Piston block; 16. Suction port; 17. Air accumulator; 18. Air delivery pipe; 19. Supporting rotating rod; 20. Fixing block; 21. Connecting hose; 22. Cavity; 23. Moving groove; 24. Reflector rod; 25. Delivery pipe; 26. Collection bag. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-7 The present invention provides a technical solution: a protective oral retractor for oral restoration, comprising a lower retractor mold 1, an upper retractor mold 101, a rotating rod 2, an air sac 17, and a collection bag 26;

[0033] Among them, an upper mold 101 of the expander is provided above the lower mold 1 of the expander, and a rotating rod 2 extends from the front end of the lower mold 1 of the expander. An air accumulator 17 is provided on the left side of the lower mold 1 of the expander, and a collection bag 26 is provided on the right side of the lower mold 1 of the expander.

[0034] The rotating rod 2 is connected to the inside of the lower mold 1 of the spreader by a bearing and extends into the lower mold 1 of the spreader. It is connected to a set of gears of the bevel gear assembly 3. The size of the lower mold 1 of the spreader is the same as that of the upper mold 101 of the spreader. There are two sets of support rods symmetrically distributed about the vertical center line of the lower mold 1 of the spreader. The inner side of both the upper mold 101 and the lower mold 1 of the spreader is fixed with connecting rods 9. The outer side of both sets of connecting rods 9 is slidably disposed inside the receiving rod 10. The upper mold 101 of the spreader forms a lifting structure with the inside of the lower mold 1 of the spreader through the support rods 8. The gear keys meshing on the other two sides of the bevel gear assembly 3 are connected to the center of the threaded rotating rod 4. The other end of the threaded rotating rod 4 is threadedly connected with a movable sleeve 5. The bottom of the movable sleeve 5 is fixed with a slider 6. The bottom of the slider 6 is slidably disposed inside the groove 7 opened inside the lower mold 1 of the spreader.

[0035] A support rod 8 is rotatably connected to the top of the movable sleeve 5. The other end of the support rod 8 is rotatably connected to the top of the upper mold 101 of the opener. A rotating rod 2 extends into the lower mold 1 of the opener and has a rotating groove 11 at its top. The inner wall of the rotating groove 11 fits against the outer wall of the inner protrusion of the fitting block 12. The rotating groove 11 is meandering. The outer side of the fitting block 12 and the limiting block 13 are integrated. The fitting block 12 is connected to the limiting groove on the inner wall of the lower mold 1 of the opener through the rotating groove 11. The two sides of the rotating groove 11 move back and forth. A fitting block 12 is attached to the inner side of the rotating groove 11. A limiting block 13 is fixed to the outer side of the fitting block 12. The outer side of the limiting block 13 is attached to the inside of the limiting groove 14. A piston block 15 is fixed to the top of the fitting block 12. The outer side of the piston block 15 is attached to the inner wall of the connection end of the suction port 16. The outer wall of the piston block 15 is attached to the inner wall of one side of the suction port 16. The piston block 15 forms a negative pressure adsorption structure between the fitting block 12 and the inner wall of the suction port 16.

[0036] First, in conjunction with the appendix Figure 1 - Appendix Figure 5The device is placed inside the patient's mouth. When the angle of the patient's mouth needs to be adjusted, rotating the rotating rod 2 causes the output end of the rotating rod 2 to drive the bevel gear assembly 3 to rotate. The two sets of gears in the bevel gear assembly 3 then drive the threaded rotating rod 4 to rotate. At this time, the output end of the threaded rotating rod 4 drives the movable sleeve 5 to rotate, causing the movable sleeve 5 to slide inside the slide groove 7 via the slider 6. This causes the support rod 8 to slide through the movable sleeve 5, which in turn causes the support rod 8 to drive the upper mold 101 of the retractor to move. This causes the upper mold 101 of the retractor to drive the connecting rod 9 to slide inside the receiving rod 10, thereby allowing the upper mold 101 of the retractor and the lower mold of the retractor to move. The height of the mold 1 can be adjusted according to the conditions. In addition, when the bevel gear assembly 3 rotates, the bevel gear assembly 3 will drive the rotating groove 11 to rotate. When the rotating groove 11 rotates, the fitting block 12 that is attached inside the rotating groove 11 will also slide inside the limiting groove 14 through the limiting block 13. At this time, the fitting block 12 will drive the piston block 15 to move back and forth. Since the outer wall of the piston block 15 is attached to the inside of the suction port 16, one end of the suction port 16 extends out of the outside of the lower mold 1 of the opener. At the same time, the suction port 16 is equipped with a one-way valve that only allows inflow and not outflow, so that the suction port 16 can be used to initially absorb the saliva inside the patient's mouth.

[0037] One end of the air sac 17 is connected to an air supply tube 18, and the other end of the air supply tube 18 is connected to one end of a support rotating rod 19. The inner side of the support rotating rod 19 is rotatably connected to the outer side of the fixing block 20. The bottom end of the fixing block 20 is fixed to the top surface of the lower mold 1 of the expander. One end of the air supply tube 18 that extends into the support rotating rod 19 is connected to a connecting hose 21. One end of the suction port 16 is connected to another set of connecting hoses 21. The air sac 17 forms an adsorption effect with the saliva inside the suction port 16 through the air supply tube 18. At the same time, one end of the other set of air supply tubes 18 is provided with a one-way valve. The other end of the connecting hose 21 is connected to the cavity 22 opened by the support rotating rod 19. A movable groove 23 is provided on the side of the cavity 22. The movable groove 23 is located inside the reflector rod 24. The gas delivered by the air accumulator 17 through the air supply pipe 18 and the connecting hose 21 passes through the cavity 22. The connecting hose 21 is made of elastic hose. One end of the movable groove 23 is attached to the outside of the reflector rod 24. The outside of the reflector rod 24 is slidably disposed inside the movable groove 23. The collection bag 26 and the delivery pipe 25 are connected by a threaded seal. Another set of connecting hoses 21 extends through the cavity 22 into the interior of the lower mold 1 of the expander, close to the side of the delivery pipe 25. One end of the delivery pipe 25 extends out of the outside of the lower mold 1 of the expander and connects to one end of the collection bag 26.

[0038] Combined with appendix Figure 1 and attached Figure 5 - Appendix Figure 7 When observing the patient's oral cavity, the reflector rod 24 is moved to rotate outside the fixed block 20 via the air supply tube 18, and the angle and length of the reflector rod 24 inside the supporting rotating rod 19 are adjusted to facilitate observation of the patient's oral cavity. Subsequently, by squeezing the air accumulator 17, gas is delivered through the air supply tube 18. When the reflector rod 24 fogs up as it is inserted into the patient's oral cavity, the gas in the air supply tube 18 also flows through the connecting hose 21 inside the reflector rod 24, causing the gas to pass through the cavity 22 and reflect light. The interior of the mirror rod 24 is circulated, and the airflow helps to balance the temperature of the mirror rod 24, effectively preventing fogging. In addition, gas is delivered to the interior of the lower mold 1 of the opener through another set of air supply pipes 18, so that the saliva in the suction port 16 will flow into the collection bag 26 through the air accumulator 17 and the delivery pipe 25, thereby achieving the purpose of saliva treatment. In addition, when the collection bag 26 is full, it can be disassembled through the threaded delivery pipe 25, thus completing a series of operations.

[0039] Working principle: When using this protective oral retractor for dental restoration, firstly, in conjunction with the attached... Figure 1 - Appendix Figure 5 The device is placed inside the patient's mouth. When the angle of the patient's mouth needs to be adjusted, rotating the rotating rod 2 causes the output end of the rotating rod 2 to drive the bevel gear assembly 3 to rotate. The two sets of gears in the bevel gear assembly 3 then drive the threaded rotating rod 4 to rotate. At this time, the output end of the threaded rotating rod 4 drives the movable sleeve 5 to rotate, causing the movable sleeve 5 to slide inside the slide groove 7 via the slider 6. This causes the support rod 8 to slide through the movable sleeve 5, which in turn causes the support rod 8 to drive the upper mold 101 of the retractor to move. This causes the upper mold 101 of the retractor to drive the connecting rod 9 to slide inside the receiving rod 10, thereby allowing the upper mold 101 of the retractor and the lower mold of the retractor to move. The height of the mold 1 can be adjusted according to the conditions. In addition, when the bevel gear assembly 3 rotates, the bevel gear assembly 3 will drive the rotating groove 11 to rotate. When the rotating groove 11 rotates, the fitting block 12 that is attached inside the rotating groove 11 will also slide inside the limiting groove 14 through the limiting block 13. At this time, the fitting block 12 will drive the piston block 15 to move back and forth. Since the outer wall of the piston block 15 is attached to the inside of the suction port 16, one end of the suction port 16 extends out of the outside of the lower mold 1 of the opener. At the same time, the suction port 16 is equipped with a one-way valve that only allows inflow and not outflow, which allows the suction port 16 to perform preliminary absorption of saliva in the patient's mouth.

[0040] Combined with appendix Figure 1 and attached Figure 5 - Appendix Figure 7 When observing the patient's oral cavity, the reflector rod 24 is moved to rotate outside the fixed block 20 via the air supply tube 18, and the angle and length of the reflector rod 24 inside the supporting rotating rod 19 are adjusted to facilitate observation of the patient's oral cavity. Subsequently, by squeezing the air accumulator 17, gas is delivered through the air supply tube 18. When the reflector rod 24 fogs up as it is inserted into the patient's oral cavity, the gas in the air supply tube 18 also flows through the connecting hose 21 inside the reflector rod 24, causing the gas to pass through the cavity 22 and reflect light. The interior of the mirror rod 24 is circulated, and the airflow helps to balance the temperature of the mirror rod 24, effectively preventing fogging. In addition, gas is delivered to the interior of the lower mold 1 of the opener through another set of air supply pipes 18, so that the saliva in the suction port 16 will flow into the collection bag 26 through the air accumulator 17 and the delivery pipe 25, thereby achieving the purpose of saliva treatment. In addition, when the collection bag 26 is full, it can be disassembled through the threaded delivery pipe 25, thus completing a series of operations.

[0041] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate orientations or positional relationships based on the accompanying drawings, and are used only for ease of description and simplification, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective oral retractor for dental restoration, comprising a lower retractor mold (1), an upper retractor mold (101), a rotating rod (2), an air sac (17), and a collection bag (26); in, An upper mold (101) is provided above the lower mold (1) of the expander, and a rotating rod (2) extends from the front end of the lower mold (1). An air accumulator (17) is provided on the left side of the lower mold (1), and a collection bag (26) is provided on the right side of the lower mold (1). Its characteristic is that it further includes: The rotating rod (2) is connected to the inside of the lower mold (1) of the opener and extends into the lower mold (1) of the opener. It is connected to a set of gears of the bevel gear assembly (3). The gear keys meshing on the other two sides of the bevel gear assembly (3) are connected to the center of the threaded rotating rod (4). The other end of the threaded rotating rod (4) is threadedly connected to a movable sleeve (5). The bottom of the movable sleeve (5) is fixed with a slider (6). The bottom of the slider (6) is slidably disposed inside the groove (7) opened inside the lower mold (1) of the opener. The top of the movable sleeve (5) is rotatably connected to a support rod (8), and the other end of the support rod (8) is rotatably connected to the top of the upper mold (101) of the opener. The rotating rod (2) extends into the lower mold (1) of the opener and has a rotating groove (11) at the top. A fitting block (12) is fitted to the inner side of the rotating groove (11). A limiting block (13) is fixed to the outer side of the fitting block (12). The outer side of the limiting block (13) is fitted to the inside of the limiting groove (14). A piston block (15) is fixed to the top of the fitting block (12). The outer side of the piston block (15) is fitted to the inner wall of the connection end of the suction port (16).

2. The protective oral retractor for dental restoration according to claim 1, characterized in that: The dimensions of the lower mold (1) of the expander are the same as those of the upper mold (101) of the expander, and the support rods (8) are symmetrically distributed in two sets about the vertical center line of the lower mold (1).

3. The protective oral retractor for dental restoration according to claim 1, characterized in that: The upper mold (101) and the lower mold (1) of the expander are both fixed with connecting rods (9) on their inner sides. The outer sides of the two sets of connecting rods (9) are slidably arranged inside the receiving rod (10). The upper mold (101) of the expander forms a lifting structure with the interior of the lower mold (1) of the expander through the support rod (8).

4. The protective oral retractor for dental restoration according to claim 1, characterized in that: The inner wall of the rotating groove (11) is fitted to the outer wall of the inner protrusion of the bonding block (12). The rotating groove (11) is arranged in a meandering shape. The outer side of the bonding block (12) and the limiting block (13) are integrated. The bonding block (12) moves back and forth between the rotating groove (11) and the limiting groove (14) opened on the inner wall of the lower mold (1) of the opener.

5. A protective oral retractor for dental restoration according to claim 1, characterized in that: The outer wall of the piston block (15) is attached to the inner wall of one side of the liquid suction port (16), and the piston block (15) forms a negative pressure adsorption structure between the attachment block (12) and the inner wall of the liquid suction port (16).

6. A protective oral retractor for dental restoration according to claim 1, characterized in that: One end of the air sac (17) is connected to an air supply pipe (18), and the other end of the air supply pipe (18) is connected to one end of a supporting rotating rod (19). The inner side of the supporting rotating rod (19) is rotatably connected to the outer side of the fixing block (20). The bottom end of the fixing block (20) is fixed to the top surface of the lower mold (1) of the opening device. One end of the air supply pipe (18) extending into the supporting rotating rod (19) is connected to a connecting hose (21). The connecting hose (21) The other end is connected to the cavity (22) opened by the support rotating rod (19). A moving groove (23) is opened on the side of the cavity (22). One end of the moving groove (23) is attached to the outside of the reflector rod (24). Another set of connecting hoses (21) extends through the cavity (22) into the interior of the lower mold (1) of the opener, close to the side of the conveying pipe (25). One end of the conveying pipe (25) extends out of the outside of the lower mold (1) of the opener and is connected to one end of the collection bag (26).

7. A protective oral retractor for dental restoration according to claim 6, characterized in that: One end of the suction port (16) is connected to another set of connecting hoses (21), and the air sac (17) forms an adsorption effect with the saliva inside the suction port (16) through the air supply pipe (18). At the same time, one end of the other set of air supply pipes (18) is provided with a one-way valve.

8. A protective oral retractor for dental restoration according to claim 6, characterized in that: The movable slot (23) is located inside the reflector rod (24). The gas delivered by the air accumulator (17) through the air supply pipe (18) and the connecting hose (21) passes through the cavity (22). The connecting hose (21) is made of an elastic hose.

9. A protective oral retractor for dental restoration according to claim 6, characterized in that: The outer side of the reflector rod (24) is slidably disposed inside the moving groove (23), and the collection bag (26) and the conveying pipe (25) are connected by a threaded seal.

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