Silicone rubber injection head
By designing a material output assembly with adjustable opening size and a silicone rubber injection head for convenient connection components, the problem of insufficient root canal filling and poor control of the filler in the prior art is solved, and more efficient root canal filling and material utilization is achieved.
Patent Information
- Application Number
- CN202421403704.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The size of the adapter end of the existing silicone rubber injection head is fixed, which causes the material to be unable to be fully filled when the root canal is fed, resulting in waste and reduced filling effect. At the same time, the 360° rotation of the adapter will affect the filler control.
A silicone rubber injection head is designed, and its material output assembly can adjust the size of the top opening and fix it through convenient connection components to ensure that the material fully fills the root canal and improves the filling effect.
By adjusting the opening size of the material output assembly, avoiding material waste, improving the root canal filling effect, and improving the filler control accuracy through fixing the assembly.
Smart Images

Figure CN222968671U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oral restoration clinical techniques, and particularly relates to a silicone rubber injection head. Background Technique
[0002] With the continuous development of China's economy, people's awareness of maintaining oral health has gradually improved, and more attention has been paid to retaining teeth. Many residual crowns and roots are required to be retained. Since the shapes of residual crowns and roots and the remaining tooth tissues often cannot provide good retention for restorations, root canal posts need to be used to strengthen retention, and then the defective parts of the tooth body are restored by crown restoration to recover the occlusal function. With the popularization of root canal treatment and the clinical application of post-core crown restoration technology, most residual crowns and roots can be preserved through perfect root canal treatment and then post-core crown restoration.
[0003] The authorized patent number "CN217723740U" discloses a silicone rubber injection head for the root canal in the oral cavity, which records the technical problem that "through the limiting member, not only the connection between the adapter and the silicone rubber delivery tube is realized, but also the adapter can rotate 360°, so that the silicone rubber can be easily delivered to the area that is difficult to reach by sight, and the silicone rubber can be easily delivered deeper into the root canal, and the operation is more rapid and convenient".
[0004] During the specific implementation of this patent by the applicant, it is found that this patent has the following technical problems:
[0005] Since the opening size at the end of the adapter set in this patent is fixedly set, when filling materials into the root canal, the materials usually cannot be more completely filled into the root canal, which will cause waste of materials and reduce the filling effect of the root canal. Secondly, the adapter is set to be able to rotate 360°, so when filling the root canal, it will have a certain impact on the control of the outlet at the end of the adapter, and thus will have a certain impact on the filling of the root canal. Therefore, a silicone rubber injection head needs to be proposed to provide a new technical solution to solve the technical problems mentioned in the above patent. Content of the Utility Model
[0006] Based on this, a silicone rubber injection head is provided to solve the following technical problems raised in the background technique: Since the opening size at the end of the adapter set in this patent is fixedly set, when filling materials into the root canal, the materials usually cannot be more completely filled into the root canal, which will cause waste of materials and reduce the filling effect of the root canal. Secondly, the adapter is set to be able to rotate 360°, so when filling the root canal, it will have a certain impact on the control of the outlet at the end of the adapter, and thus will have a certain impact on the filling of the root canal.
[0007] The utility model adopts the following technical solutions:
[0008] The described silicone rubber injection head specifically includes a socket base, a transportation pipe is fixedly connected to the top of the socket base, the inside of the socket base and the transportation pipe is communicatively arranged, a fixing seat is fixedly connected to the top of the socket base, a material output component is inserted into the top of the transportation pipe, a convenient connection component is arranged outside the fixing seat, and the fixing seat fixes the material output component through the convenient connection component.
[0009] Further, the material output component includes a fixing ring, a rotating disk, a connecting ring, a sliding rod and an insertion block. A fixing ring is arranged on the top of the fixing seat, a rotating groove is opened on the top of the fixing ring, a rotating disk is arranged on the top of the fixing ring, a connecting ring is fixedly connected to the bottom of the rotating disk, the connecting ring is rotatably connected with the rotating groove, a sliding rod is slidably connected to the outer peripheral side of the rotating disk, an insertion block is fixedly connected to the end of the sliding rod away from the rotating disk, and the end of the insertion block close to the fixing ring at the bottom is in an insertion and limiting arrangement with the outer peripheral side of the fixing ring.
[0010] Further, the material output component further includes a slide rail, an output arc plate, a connecting piece and a first slider. Eight slide rails are fixedly connected to the top of the rotating disk in a circumferential array, and every two slide rails are in a group. Four output arc plates and four connecting pieces are arranged on the top of the rotating disk, and the output arc plates and the connecting pieces are arranged alternately. Both ends of each connecting piece are slidably connected to the side walls of the adjacent two output arc plates. A first slider is fixedly connected to the bottom of the outer side of the output arc plate, an inclined thread groove is opened on the top of each first slider, and the first slider is slidably connected to each group of slide rails. A reserved groove is opened at the bottom of each first slider.
[0011] Further, the material output component further includes a fixing piece, a first spring and a first rotating ring. Four fixing pieces are fixedly connected to the top of the rotating disk in a circumferential array, and each fixing piece is located inside each reserved groove. A first spring is arranged inside each reserved groove, one end of the first spring is fixedly connected to the fixing piece, and the other end of the first spring is fixedly connected to the inside of the reserved groove. A first rotating ring is arranged on the outer side of each of the four output arc plates. A plurality of threads are inclined on the inner peripheral side of the first rotating ring, and the first rotating ring is in a threaded connection with the inclined thread groove on the top of the first slider.
[0012] Further, the convenient connection component includes a plugging ring and a supporting ring. A slot is formed at the top of the fixed seat, and the bottom of the fixed ring is fixedly connected with the plugging ring. The plugging ring is plugged into the slot. The bottom of the outer peripheral side of the fixed seat is fixedly connected with the supporting ring. A second rotating ring is further arranged on the outer side of the fixed seat. A plurality of threads are obliquely arranged on the inner peripheral side of the second rotating ring. The supporting ring serves to support the second rotating ring.
[0013] Further, the convenient connection component further includes a second rotating ring, second sliders and second springs. Four sliding grooves are formed in a circumferential array on the circumference of the fixed seat. The inner sides of the sliding grooves are slidably connected with the second sliders. A plurality of threads are obliquely arranged at one end of each second slider away from the fixed seat. The inner peripheral side of the second rotating ring is in threaded connection with one end of the four second sliders away from the fixed seat. One end of each second slider located on the inner peripheral side of the fixed seat is in plugging and limiting connection with the plugging ring. The bottoms of the second sliders are fixedly connected with the second springs respectively, and the other ends of the second springs are fixedly connected with the outer peripheral side of the fixed seat.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] A silicone rubber injection head provided by the utility model can adjust the opening size at the top of the material output component, so that the material can be more completely filled into the root canal, avoiding waste of the material, and further improving the effect of root canal filling. At the same time, the material output component can be fixed according to the situation, so as to improve the control of the opening position of the material output component and further improve the effect of root canal filling.
[0016] A silicone rubber injection head provided by the utility model can disassemble the material output component, which is convenient for maintaining and cleaning the material output component, and further improves the convenience of the injection head. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the solutions in the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is a schematic diagram of the overall structure of a silicone rubber injection head provided by the present utility model;
[0019] Figure 2 It is an exploded structure diagram of a silicone rubber injection head provided by the present utility model;
[0020] Figure 3 Structural schematic diagram of a fixing seat for a silicone rubber injection head provided by the present utility model;
[0021] Figure 4 Structural schematic diagram of a fixing ring for a silicone rubber injection head provided by the present utility model;
[0022] Figure 5 Structural schematic diagram of an output arc plate for a silicone rubber injection head provided by the present utility model;
[0023] Figure 6 Structural schematic diagram of a first rotating ring for a silicone rubber injection head provided by the present utility model;
[0024] Figure 7 For a silicone rubber injection head provided by the present utility model Figure 6 Structural schematic diagram of the A position;
[0025] Figure 8 Structural schematic diagram of a second rotating ring for a silicone rubber injection head provided by the present utility model;
[0026] Figure 9 For a silicone rubber injection head provided by the present utility model Figure 8 Structural schematic diagram of the B position.
[0027] In the attached drawings, the list of components represented by each reference numeral is as follows:
[0028] 1. Socket base; 2. Transportation pipe; 3. Fixing seat; 4. Material output component; 5. Convenient connection component; 6. Fixing ring; 7. Rotating disk; 8. Connecting ring; 9. Sliding rod; 10. Insert block; 11. Slide rail; 12. Output arc plate; 13. Connecting piece; 14. First slider; 15. Fixing piece; 16. First spring; 17. First rotating ring; 18. Inserting ring; 19. Supporting ring; 20. Second rotating ring; 21. Second slider; 22. Second spring. Detailed implementation manners
[0029] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0030] As in the background art, since the opening size at the end of the adapter set in this patent is fixedly set, when filling materials into the root canal, the materials usually cannot be filled into the root canal more completely, resulting in waste of materials and reducing the effect of filling the root canal. Secondly, the adapter is set to be able to rotate 360°, so when filling the root canal, it will have a certain impact on the control of the outlet at the end of the adapter, and further have a certain impact on the filling materials of the root canal.
[0031] To solve this technical problem, the present utility model provides a silicone rubber injection head, which can adjust the opening size at the top of the material output component 4, so that the materials can be filled into the root canal more completely, avoiding waste of materials, and further improving the effect of filling the root canal. At the same time, the material output component 4 can be fixed according to the situation, so as to improve the control of the opening position of the material output component 4 and further improve the effect of filling the root canal.
[0032] Specifically, please refer to Figures 1-3 , a silicone rubber injection head specifically includes a socket base 1, a transport pipe 2 is fixedly connected to the top of the socket base 1, the inside of the socket base 1 and the transport pipe 2 is connected, a fixing seat 3 is fixedly connected to the top of the transport pipe 2, a material output component 4 is inserted into the top of the fixing seat 3, a convenient connection component 5 is arranged outside the fixing seat 3, and the fixing seat 3 fixes the material output component 4 through the convenient connection component 5.
[0033] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
[0034] Embodiment 1:
[0035] Please refer to Figures 1-3 , a silicone rubber injection head, which includes a socket base 1, a transport pipe 2 is fixedly connected to the top of the socket base 1, the inside of the socket base 1 and the transport pipe 2 is connected, a fixing seat 3 is fixedly connected to the top of the transport pipe 2, a material output component 4 is inserted into the top of the fixing seat 3, a convenient connection component 5 is arranged outside the fixing seat 3, and the fixing seat 3 fixes the material output component 4 through the convenient connection component 5.
[0036] When in use, the material output component 4 can be sleeved inside the fixing seat 3 and fixed through the arrangement of the convenient connection component 5. Subsequently, through the connection inside the socket base 1 and the transport pipe 2, the injection material can be transported to the inside of the material output component 4, and the root canal can be injected through the opening of the material output component 4;
[0037] Meanwhile, through the setting of the material output component 4, the opening of the material output component 4 can be adjusted according to the actual situation, thereby improving the effect of injecting materials into the root canal. The rotation mode of the material output component 4 can also be changed to improve the convenience of injecting materials into the root canal.
[0038] Embodiment 2:
[0039] This Embodiment 2 is used to further disclose the specific structure of the material output component 4 on the premise of the above embodiment. By cooperating the material output component 4 with the structure in the above embodiment, the size of the opening at the top of the material output component 4 can be adjusted, so that the material can be more completely filled into the root canal, avoiding waste of the material, and thus improving the effect of filling the root canal. At the same time, the material output component 4 can be fixed according to the situation, so as to improve the control of the opening position of the material output component 4 and further improve the effect of filling the root canal.
[0040] Further optimize a silicone rubber injection head provided in Embodiment 1. Specifically, as Figures 4-7 shown, the material output component 4 includes a fixed ring 6, a rotating disk 7, a connecting ring 8, a sliding rod 9 and an insertion block 10. A fixed ring 6 is arranged on the top of the fixed seat 3. A rotating groove is opened at the top of the fixed ring 6. A rotating disk 7 is arranged on the top of the fixed ring 6. A connecting ring 8 is fixedly connected to the bottom of the rotating disk 7. The connecting ring 8 is rotatably connected to the rotating groove. The outer peripheral side of the rotating disk 7 is slidably connected with a sliding rod 9. One end of the sliding rod 9 away from the rotating disk 7 is fixedly connected with an insertion block 10. One end of the bottom of the insertion block 10 close to the fixed ring 6 is in a plug-in limit setting with the outer peripheral side of the fixed ring 6.
[0041] The material output component 4 further includes a slide rail 11, an output arc plate 12, a connecting piece 13 and a first slider 14. Eight slide rails 11 are fixedly connected in a circumferential array on the top of the rotating disk 7, and every two slide rails 11 are in a group. Four output arc plates 12 and four connecting pieces 13 are arranged on the top of the rotating disk 7, and the output arc plates 12 and the connecting pieces 13 are arranged alternately. Both ends of each connecting piece 13 are slidably connected to the side walls of the adjacent two output arc plates 12. The bottom of the outside of the output arc plate 12 is fixedly connected with a first slider 14. Inclined threaded grooves are opened at the tops of the first sliders 14. The first sliders 14 are slidably connected with each group of slide rails 11. Reserved grooves are opened at the bottoms of each first slider 14.
[0042] The material output component 4 further includes fixing pieces 15, first springs 16 and first rotating rings 17. Four fixing pieces 15 are fixedly connected in a circumferential array on the top of the rotating disc 7, and each fixing piece 15 is located inside each reserved groove. A first spring 16 is arranged inside each reserved groove, one end of the first spring 16 is fixedly connected to the fixing piece 15, and the other end of the first spring 16 is also fixedly connected to the inner side of the reserved groove. First rotating rings 17 are arranged on the outer sides of the four output arc plates 12. A plurality of threads are inclined on the inner circumferential side of the first rotating ring 17, and the first rotating ring 17 is in threaded connection with the inclined threaded groove on the top of the first slider 14.
[0043] Specifically: according to the actual situation, move the insertion block 10 towards the end away from the rotating disc 7, so that the bottom of the insertion block 10 is disengaged from the plug-in limit fit with the outer side of the fixed ring 6, thereby enabling the mobility of the opening formed at the top of the four output arc plates 12 to be improved, and further improving the convenience of operation for medical staff. At this time, the insertion block 10 can drive the sliding rod 9 to move synchronously towards the end away from the rotating disc 7. Through the arrangement of the sliding rod 9, the insertion block 10 can be supported to prevent the insertion block 10 from falling or being lost after disengaging from the outer side of the fixed ring 6;
[0044] At the same time, the size of the discharge port can also be adjusted according to the actual situation. By rotating the first rotating ring 17, the four first sliders 14 can be moved closer to the center of the first rotating ring 17 through the arrangement of the inner circumferential side of the first rotating ring 17 and the inclined threaded groove on the top of the first slider 14. Thus, the four output arc plates 12 can be driven by the first sliders 14 to move closer to the center position of the first rotating ring 17. After the four output arc plates 12 are close together, the side walls of the four output arc plates 12 will be in contact with each other, and the connecting piece 13 will be completely received between two adjacent output arc plates 12. At the same time, the opening state at the top of the four output arc plates 12 is set to the minimum;
[0045] When it is necessary to increase the opening at the top of the four output arc plates 12, the first rotating ring 17 can be rotated in the reverse direction to cancel the effect of the first rotating ring 17 on bringing the four first sliders 14 closer together. At this time, through the elastic setting of the first spring 16 inside the reserved groove at the bottom of the first slider 14, the first slider 14 can be pushed in the direction away from the fixing piece 15, and the first slider 14 can slide between the two slide rails 11, so as to drive the four output arc plates 12 to separate from each other through the movement of the first slider 14, thereby achieving the effect of adjusting the opening size at the top of the four output arc plates 12;
[0046] Meanwhile, the connecting piece 13 is made of a relatively soft material and can be slightly deformed according to the displacement between the output arc plates 12, so as to avoid affecting the movement between the output arc plates 12. Through the setting of the connecting piece 13, after the output arc plates 12 are separated from each other, the gap between the output arc plates 12 can be filled, so as to better transport the filling material.
[0047] Embodiment 3:
[0048] This Embodiment 3 further discloses the specific structure of the convenient connection component 5 on the premise of the above embodiments. By cooperating the convenient connection component 5 with the structure in the above embodiments, the material output component 4 can be disassembled, so as to facilitate the maintenance and cleaning of the material output component 4, and further improve the convenience of the injection head.
[0049] Further optimize the silicone rubber injection head provided in Embodiment 1 and Embodiment 2. Specifically, as Figures 8-9 shown, the convenient connection component 5 includes a plugging ring 18 and a supporting ring 19. A slot is opened at the top of the fixed seat 3, and a plugging ring 18 is fixedly connected to the bottom of the fixed ring 6, and the plugging ring 18 is plugged into the slot. A supporting ring 19 is fixedly connected to the bottom of the outer peripheral side of the fixed seat 3. A second rotating ring 20 is also arranged on the outer side of the fixed seat 3, and a plurality of threads are inclined on the inner peripheral side of the second rotating ring 20. The supporting ring 19 serves to support the second rotating ring 20.
[0050] The convenient connection component 5 further includes a second rotating ring 20, second sliders 21 and second springs 22. Four sliding grooves are arranged in a circumferential array on the circumference of the fixed seat 3. The inner sides of the sliding grooves are slidably connected with the second sliders 21. One end of the second slider 21 away from the fixed seat 3 is inclined with a plurality of threads, and the inner peripheral side of the second rotating ring 20 is threadedly connected with one end of the four second sliders 21 away from the fixed seat 3. One end of the second slider 21 located on the inner peripheral side of the fixed seat 3 is plugged and limited with the plugging ring 18. Second springs 22 are fixedly connected to the bottoms of the second sliders 21, and the other ends of the second springs 22 are fixedly connected to the outer peripheral side of the fixed seat 3.
[0051] Specifically: when it is necessary to fix the fixed ring 6 to the top of the fixed seat 3, the fixed ring 6 can be placed on the top of the fixed seat 3, and at the same time, the plugging ring 18 at the bottom of the fixed ring 6 will be inserted into the inner side of the slot at the top of the fixed seat 3;
[0052] Subsequently, rotate the supporting ring 19. Through the setting of the inclined threads on the inner peripheral side of the supporting ring 19 and the inclined threads on the outer peripheral sides of the four second sliders 21, the four second sliders 21 can be made to gather towards the center of the fixed seat 3 while rotating the supporting ring 19, and the second sliders 21 can slide towards the center of the fixed seat 3 inside the sliding grooves;
[0053] At the same time, the end of the second slider 21 located on the inner side of the fixing seat 3 will be plugged into the outer peripheral side of the plug-in ring 18, and produce a plug-in limiting effect on the plug-in ring 18 inside the slot, thereby preventing the plug-in ring 18 from being separated from the inner side of the slot at the top of the fixing seat 3 during operation, thereby improving the stability of the connection;
[0054] When the fixing ring 6 needs to be replaced, the supporting ring 19 can be rotated in the opposite direction, so that the supporting ring 19 cancels the limit between the four second sliders 21. At this time, the bottom of the second slider 21 will be pushed away from the center of the fixing seat 3 through the elastic setting of the second spring 22, and the end of the second slider 21 will be separated from the plug-in limit on the outer peripheral side of the plug-in ring 18, so that the plug-in ring 18 can be pulled out. Through the convenient plug-in limit operation, the workload of the staff when replacing or repairing the material output component 4 can be reduced.
Claims
1. A silicone rubber injection head, comprising a sleeve base (1), characterized in that: The top of the sleeve base (1) is fixedly connected with a transport pipe (2), the sleeve base (1) and the inner side of the transport pipe (2) are connected, the top of the transport pipe (2) is fixedly connected with a fixing seat (3), the top of the fixing seat (3) is plugged with a material output component (4), the outer side of the fixing seat (3) is provided with a convenient connection component (5), and the fixing seat (3) fixes the material output component (4) through the convenient connection component (5); The material output component (4) comprises a fixed ring (6), a rotating disk (7), a connecting ring (8), a sliding rod (9) and an insert block (10); a fixed ring (6) is arranged on the top of the fixed seat (3); a rotating groove is opened on the top of the fixed ring (6); a rotating disk (7) is arranged on the top of the fixed ring (6); a connecting ring (8) is fixedly connected to the bottom of the rotating disk (7); the connecting ring (8) and the rotating groove are rotatably connected; a sliding rod (9) is slidably connected to the outer peripheral side of the rotating disk (7); an insert block (10) is fixedly connected to one end of the sliding rod (9) away from the rotating disk (7); an end of the bottom of the insert block (10) close to the fixed ring (6) is inserted into and limited by the outer peripheral side of the fixed ring (6); The convenient connection component (5) comprises a plug-in ring (18) and a supporting ring (19); a slot is provided on the top of the fixing seat (3); the plug-in ring (18) is fixedly connected to the bottom of the fixing ring (6); the plug-in ring (18) and the slot are plugged together; the supporting ring (19) is fixedly connected to the bottom of the outer peripheral side of the fixing seat (3); a second rotating ring (20) is also provided on the outer side of the fixing seat (3); and a plurality of threads are obliquely provided on the inner peripheral side of the second rotating ring (20); the supporting ring (19) plays a role in supporting the second rotating ring (20).
2. A silicone rubber injection head according to claim 1, characterized in that: The material output component (4) also includes a slide rail (11), an output arc plate (12), a connecting piece (13) and a first slider (14); the top of the rotating disk (7) is provided with eight slide rails (11) in a circular array and fixedly connected thereto, and every two of the slide rails (11) form a group; the top of the rotating disk (7) is provided with four output arc plates (12) and four connecting pieces (13); the output arc plates (12) and the connecting pieces (13) are arranged in an alternating manner, and both ends of each connecting piece (13) are slidably connected to the side walls of two adjacent output arc plates (12); the outer bottom of the output arc plate (12) is fixedly connected to the first slider (14), and the top of the first slider (14) is provided with an inclined thread groove, and the first slider (14) is slidably connected to each group of the slide rails (11), and each of the first sliders (14) is provided with a reserved groove at the bottom.
3. A silicone rubber injection head according to claim 2, characterized in that: The material output assembly (4) further comprises a fixed plate (15), a first spring (16) and a first rotating ring (17); four fixed plates (15) are arranged in a circular array on the top of the rotating disk (7) and are fixedly connected thereto; each of the fixed plates (15) is located on the inner side of each of the reserved grooves; a first spring (16) is arranged on the inner side of each of the reserved grooves; one end of the first spring (16) is fixedly connected to the fixed plate (15); and the other end of the first spring (16) is also fixedly connected to the inner side of the reserved groove; a first rotating ring (17) is arranged on the outer side of each of the four output arc plates (12); a plurality of threads are obliquely arranged on the inner circumference of the first rotating ring (17); and the first rotating ring (17) is threadedly connected to the oblique thread groove on the top of the first slider (14).
4. The silicone rubber injection head according to claim 1, characterized in that: The convenient connection component (5) further comprises a second rotating ring (20), a second slider (21) and a second spring (22); four sliding grooves are arranged in a circular array on the circumference of the fixed seat (3); a second slider (21) is slidably connected to the inner side of the sliding groove; a plurality of threads are obliquely arranged on one end of the second slider (21) away from the fixed seat (3); and the inner circumference of the second rotating ring (20) is threadedly connected to one end of the four second sliders (21) away from the fixed seat (3); one end of the second slider (21) located on the inner circumference of the fixed seat (3) is plugged and limited with the plug-in ring (18); a second spring (22) is fixedly connected to the bottom of the second slider (21); and the other end of the second spring (22) is fixedly connected to the outer circumference of the fixed seat (3).
Citation Information
Patent Citations
Root canal silicone rubber injection head for oral cavity
CN217723740U