Digital guide plate special for lower jaw and dental drilling tool
By setting a coolant pipe connection and a flow guide groove at the top of the guide ring, the problem of poor cooling effect of the digital guide plate is solved, and the coolant is made to flow along the outer wall of the drill bit to the end of the drill bit, which improves drilling accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HOSPITAL OF STOMATOLOGY SUN YAT SEN UNIV
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-01
AI Technical Summary
Existing digital guide plates have poor cooling effects during drilling, making it difficult for coolant to effectively reach the drill bit tip, which affects drilling accuracy and safety.
A coolant pipe connection is provided around the inlet hole at the top of the guide ring, and a flow guide groove is opened on the guide plate and the guide ring. The coolant is guided to the bottom of the guide ring and the drill bit by the coolant pipe. Combined with the flow guide groove and the baffle block, the coolant is ensured to flow along the outer wall of the drill bit to the end of the drill bit.
This allows the coolant to flow more easily along the outer wall of the drill bit to the end of the drill bit, improving the cooling effect and ensuring drilling accuracy and safety.
Smart Images
Figure CN224179814U_ABST
Abstract
Description
Digital guide plate for mandible and dental drilling tools Technical Field
[0001] This utility model relates to the field of dental drilling tools, specifically to a digital guide plate for the mandible and a dental drilling tool. Background Technology
[0002] When performing implant surgery, dentists occasionally need to drill holes in the implant site. Holding a dental drill, the dentist first aligns the drill bit with the drilling area and then starts drilling. During drilling, the drill tip generates high temperatures due to friction. To prevent overheating and damage to surrounding tissues, dentists often use a syringe to spray saline solution into the drill tip. The saline solution acts as a coolant, absorbing the heat and cooling the drill tip. This drilling operation requires a high level of skill from the dentist; if the dentist is not proficient, it is easy to drill off-center, affecting the drilling results. Therefore, some dentists have begun to use digital surgical guides to assist in drilling, improving accuracy. Specifically, dentists first obtain three-dimensional digital images of the patient's mouth using CT, CBCT, or oral scans. Then, they design the digital surgical guide using CAD (Computer-Aided Design) software and manufacture the guide using 3D printing technology. The guide has mounting holes, and the dentist fixes the corresponding metal guide rings into these holes, thus forming a complete digital surgical guide. Before drilling, the dentist first places a digital dental guide on the patient's tooth for fixation. Once fixed, the center hole of the guide ring is aligned with the drilling area. The dentist holds the dental drill and inserts the drill bit downwards into the center hole of the guide ring. During this process, the drill bit moves axially downwards along the wall of the center hole, which acts as an axial guide, directing the drill bit tip towards the drilling area. Once the drill bit tip has passed through the center hole and is aligned with the drilling area, the dentist starts drilling. During drilling, the drill bit continues to move axially downwards along the wall of the center hole, which continues to guide the drill bit tip, preventing it from drilling off-center. While digital guide plates can improve drilling accuracy, they cover the drilling area, preventing the syringe from directly spraying coolant onto the drill bit tip. Instead, the coolant is sprayed onto the top of the guide ring. Because the gap between the guide ring and the drill bit is small, the coolant sprayed onto the top of the guide ring cannot flow into this narrow space on its own, and therefore cannot flow along the outer wall of the drill bit to the drill bit tip, resulting in poor cooling effect. Summary of the Invention
[0003] The technical problem this invention aims to solve is to provide a digital guide plate specifically for the mandible. When drilling with this guide plate, coolant can be guided to the space between the bottom of the guide ring and the drill bit, allowing the coolant to flow more easily along the outer wall of the drill bit to the drill tip, resulting in good cooling. This invention also provides a dental drilling tool. When drilling with this tool, coolant can be guided to the space between the bottom of the guide ring and the drill bit, allowing the coolant to flow more easily along the outer wall of the drill bit to the drill tip, resulting in good cooling.
[0004] The inventors initially considered adding a coolant inlet at the top of the guide ring, leading to the bottom of the guide ring's central hole. A syringe would then spray coolant onto the top of the guide ring, guiding it through the inlet to the bottom of the guide ring and between the guide ring and the drill bit. However, in practice, it was found that due to the small size of the guide ring and the correspondingly small inlet, only a small amount of coolant sprayed onto the top of the guide ring could flow into the inlet on its own, resulting in insufficient cooling. The inventors then conceived of adding a pipe connection around the inlet at the top of the guide ring, with a coolant pipe connected to the syringe outlet. In use, the syringe would guide the coolant through the coolant pipe to the inlet, allowing it to flow into the bottom of the guide ring's central hole. Under the influence of gravity and fluid pressure, the coolant would flow relatively easily along the outer wall of the drill bit towards its tip, resulting in good cooling. However, in practice, it was found that since the pipe connection was located at the top of the guide ring, both the pipe connection and the pipe itself could easily interfere with the drill bit.
[0005] To solve the above-mentioned technical problems, the present invention provides a digital guide plate for the mandible, which has mounting holes on its body. A guide ring is fixedly installed in the mounting holes. The guide ring has an axial central hole into which a dental drill bit can be inserted. The wall of the central hole serves as an axial guide wall, guiding the dental drill bit inserted into the central hole axially towards the drilling area. A guide plate inlet hole is opened at the bottom of the mounting hole wall, and a guide ring inlet hole is opened at the bottom of the guide ring. The inlet end of the guide plate inlet hole is connected to the outside, and the outlet end is connected to the inlet end of the guide ring inlet hole. The outlet end of the guide ring inlet hole is connected to the bottom of the central hole. The guide plate is provided with a pipe connection part for connecting a coolant pipe, and the pipe connection part surrounds the inlet end of the guide plate inlet hole.
[0006] Furthermore, the center hole of the guide ring has a guide groove on its wall to guide the axial and / or circumferential flow of the coolant, and the guide groove is connected to the outlet end of the guide ring's inlet hole.
[0007] Furthermore, the guide channel is specifically a spiral guide channel.
[0008] Furthermore, the guide channel has two channels with opposite directions of rotation.
[0009] Furthermore, the flow channel walls are equipped with turbulence blocks.
[0010] Furthermore, the mounting hole wall has a guide plate outlet hole, the guide ring has a guide ring outlet hole, the inlet end of the guide ring outlet hole is connected to the center hole and the outlet end is connected to the inlet end of the guide plate outlet hole, the outlet end of the guide plate outlet hole is connected to the outside, the inlet end of the flow channel is connected to the guide ring inlet hole and the outlet end is connected to the guide ring outlet hole.
[0011] Furthermore, the mounting holes on the plate are vertical holes, and the guide rings are vertical guide rings.
[0012] Furthermore, the liquid inlet and liquid outlet of the guide ring are at different heights and / or have different orientations.
[0013] The dental drilling tool of this utility model includes a digital guide plate for the mandible and a dental drill. The guide plate guides the drill bit of the dental drill to the drilling area. It also includes a coolant injector for discharging coolant. As described above, the coolant injector has a coolant pipe at its outlet end, and the end of the pipe is connected to the pipe connection part of the digital guide plate body, so that the coolant output by the injector is guided to the guide plate inlet hole of the guide plate body.
[0014] In use, the syringe guides the coolant through the coolant pipe to the guide plate inlet hole of the guide plate body. The wall of the guide plate inlet hole guides the coolant to the guide ring inlet hole, and the wall of the guide ring inlet hole guides the coolant to the bottom of the guide ring's central hole, that is, guiding the coolant to the gap between the bottom of the guide ring and the drill bit. Compared with the prior art, which can only spray coolant to the top of the guide ring, the guide plate of this utility model can guide the coolant to the gap between the bottom of the guide ring and the drill bit. Under the action of gravity and fluid pressure, the coolant can flow more easily along the outer wall of the drill bit to the end of the drill bit, resulting in a better cooling effect. Attached Figure Description
[0015] Figure 1 is a schematic diagram of a dental drilling tool.
[0016] Figure 2 is a schematic diagram of the guide plate.
[0017] Figure 3 is a cross-sectional view AA of Figure 2.
[0018] Figure 4 is a schematic diagram of the guide ring after it has been cut along line AA in Figure 2.
[0019] Figure 5 is a schematic diagram of the pipe connection part of the coolant pipe to the guide plate body with the drill bit inserted into the center hole of the guide ring.
[0020] Figure 6 is a top view of the guide plate. The figure mainly shows the parts of the guide plate with mounting holes. The inlet hole, outlet hole, guide groove and turbulence block are shown in the figure with dashed lines.
[0021] Figure 7 is a schematic diagram of the unfolded guide channel of the second embodiment.
[0022] Figure 8 is a cross-sectional view of the guide plate of the third embodiment.
[0023] Figure 9 is a cross-sectional view of the guide plate and drill bit of the fourth embodiment.
[0024] Figure 10 is a cross-sectional view of the guide plate and drill bit of the fifth embodiment. Detailed Implementation
[0025] The present invention will be further described in detail below with reference to specific embodiments.
[0026] First embodiment:
[0027] The dental drilling tools are shown in Figure 1, including a digital guide plate 10 for the mandible and a dental drill (only the drill bit 9 is shown in the figure). The digital guide plate 10 is shown in Figures 2 and 3, including a plate body 1 with a vertical mounting hole 11. A metal guide ring 2 is fixedly installed in the mounting hole 11. The guide ring 2 is axially oriented vertically, i.e., it is a vertical guide ring. The guide ring 2 has a vertical central hole 21. When performing implant surgery on a patient, the dentist needs to drill a hole in the area of the implant site. The dentist first places the plate body 10 onto the patient's tooth for fixation. After fixation, the central hole 21 of the guide ring 2 is aligned downwards with the drilling area. The dentist holds the dental drill (Figure 5) and inserts the drill bit 9 downwards into the central hole 21 of the guide ring 2. During this process, the drill bit 9 moves axially downwards along the central hole wall 211. The central hole wall 211 acts as an axial guide wall, guiding the drill bit tip 91 axially towards the drilling area. When the drill bit tip 91 passes through the central hole 21 of the guide ring 2 and is aligned with the drilling area, the doctor starts drilling. During the drilling process, the drill bit 9 continues to move axially downward along the central hole wall 211, and the central hole wall 211 continues to guide the drill bit tip 91 to prevent the drill bit 9 from drilling off-center.
[0028] As shown in Figures 1 and 3, the drill tip 91 generates a high temperature due to friction during drilling. Therefore, this dental drilling tool is equipped with a coolant injector 3 to cool the drill tip 9. A guide plate inlet hole 12 is provided at the bottom of the front wall 111 of the mounting hole 11, with the front end 121 being the inlet and the rear end 122 being the outlet. The front end 121 of the guide plate inlet hole connects to the outside, while the rear end 122 faces the guide ring 2. A circular pipe connection part 13 is provided on the outer wall of the guide plate 10 body 1, surrounding the front end 121 of the guide plate inlet hole. A guide ring 2 has a front-to-back liquid inlet hole 23 at its bottom front 201. The front end 231 of the guide ring liquid inlet hole is the liquid inlet end, and the rear end 232 is the liquid outlet end. The guide ring liquid inlet hole 23 has the same size as the guide plate liquid inlet hole 12. The front end 231 of the guide ring liquid inlet hole connects to the rear end 122 of the guide plate liquid inlet hole, and the rear end 232 of the guide ring liquid inlet hole connects to the bottom of the center hole 21 of the guide ring 2. The syringe 3 stores coolant inside, and the syringe outlet end 31 is connected to a coolant pipe 4. The end 41 of the pipe is connected to a pipe connector 13, as shown in Figure 5.
[0029] As shown in Figures 1 and 5, while the dentist is drilling with a dental drill, they push the syringe 3. The syringe outlet 31 outputs coolant, and the coolant pipe 4 guides the coolant output from the syringe 3 to the guide plate inlet 12 of the guide plate 10. The wall 123 of the guide plate inlet 12 guides the coolant to the guide ring inlet 23, and the wall 233 of the guide ring inlet 23 guides the coolant to the front bottom of the center hole 21 of the guide ring 2, that is, guiding the coolant to the gap 51 between the front bottom 201 of the guide ring and the drill bit 9. Compared with the prior art, which can only spray coolant onto the top 203 of the guide ring, the guide plate 10 of this invention can guide the coolant to the gap 51 between the front bottom 201 of the guide ring and the drill bit 9. Under the action of gravity and fluid pressure, the coolant can flow more easily along the outer wall 92 of the drill bit 9 to the end 91 of the drill bit, thereby achieving effective cooling of the drill bit 9 and providing a good cooling effect.
[0030] As shown in Figure 3, a guide plate outlet hole 14 is formed at the top of the rear wall 112 of the mounting hole 11, with the front end 141 of the guide plate outlet hole serving as the inlet and the rear end 142 as the outlet. A guide ring outlet hole 28 is formed at the top rear 204 of the guide ring 2, with a different height from the guide ring inlet hole 23. The guide ring inlet hole 23 faces forward, while the guide ring outlet hole 28 faces backward. The front end 281 of the guide ring outlet hole serves as the inlet, and the rear end 282 serves as the outlet. The front end 281 connects to the center hole 21 of the guide ring 2, while the rear end 282 connects to the front end 141 of the guide plate outlet hole. The rear end 142 of the guide plate outlet hole connects to the outside. The guide plate outlet hole 14 is smaller than the guide ring outlet hole 28, and the guide ring outlet hole 28 is smaller than the guide ring inlet hole 23. See Figures 3 and 4. The central hole wall 211 of the guide ring 2 has two spiral guide grooves 29 with opposite directions of rotation. The front end 291 of the guide groove is the liquid inlet end and the rear end 292 is the liquid outlet end. The front end 291 of the guide groove is connected to the rear end 232 of the liquid inlet hole of the guide ring, and the rear end 292 is connected to the front end 281 of the liquid outlet hole of the guide ring. As shown in Figures 5 and 6, during the drilling process, debris inevitably enters the gap 50 between the drill bit 9 and the guide ring 2. Even if some debris happens to enter the gap 51 between the bottom front 201 of the guide ring and the drill bit 9, blocking the coolant behind the guide ring inlet hole 23 and hindering the flow of coolant that has already flowed to the rear end 232 of the guide ring inlet hole, the coolant can still be guided by the guide groove 29, flowing circumferentially along the guide groove 29 to the side and rear of the drill bit 9, entering the gap 52 between the guide ring side 204 and the drill bit 9, and the gap 53 between the guide ring rear 205 and the drill bit 9, and then flowing downwards along the drill bit side wall 93 and the drill bit rear wall 94 to the drill bit end 91, thereby achieving effective cooling of the drill bit 9. As shown in Figure 4, since the guide groove 29 is a spiral guide groove, which is both a circumferential and axial guide groove, the coolant flows circumferentially along the guide groove 29 and also axially along the guide groove 29. As shown in Figure 5, the heat from the drill bit tip 91 is transferred to the drill bit outer wall 92. When the blockage of debris is severe, only a small amount of coolant can flow down the drill bit outer wall 92 to the drill bit tip 91. In this case, the coolant outlet holes 28 of the guide ring and 19 of the guide plate can ensure the effective discharge of excess coolant. Although this discharged coolant cannot directly reach the drill bit tip 91, it can still carry away some of the heat on the drill bit outer wall 92 during its flow, thereby effectively reducing the temperature of the drill bit 9.
[0031] As shown in Figure 5, because the coolant outlet hole 28 of the guide ring is smaller than the coolant inlet hole 23 of the guide ring, and the coolant outlet hole 19 of the guide plate is smaller than the coolant outlet hole 28 of the guide ring, the outflow rate is less than the inflow rate. This creates a certain internal pressure in the coolant flow path, forcing the coolant to flow preferentially into the gap 50 between the drill bit 9 and the guide ring 2, rather than directly into the coolant outlet hole 28 of the guide ring and the coolant outlet hole 19 of the guide plate. As shown in Figures 4 and 5, multiple flow-disrupting blocks 293 are provided on the channel wall of the guide channel 29 away from the drill bit 9. The multiple flow-disrupting blocks 293 are arranged in parallel along the axis of the guide channel 29. The flow-disrupting blocks 293 can effectively disrupt the coolant flow direction, forcing the coolant to flow into the gap 50 between the drill bit 9 and the guide ring 2.
[0032] Second embodiment:
[0033] The second embodiment is largely the same as the first embodiment, except that: as shown in Figure 4, in the first embodiment, multiple baffle blocks 293 are arranged side by side along the axis of the guide channel 29. As shown in Figure 7, in the second embodiment, among the multiple baffle blocks 293, every two adjacent baffle blocks 293 are staggered.
[0034] Third embodiment:
[0035] The third embodiment is largely the same as the first embodiment, except that: as shown in Figure 3, in the first embodiment, the guide ring inlet hole 23 and the guide ring outlet hole 28 have different heights and opposite orientations, and the guide groove 29 is a spiral guide groove, which is both a circumferential and axial guide groove. The coolant flows circumferentially along the guide groove 29 and also axially along the guide groove 29. As shown in Figure 8, in the third embodiment, the guide ring outlet hole 28 is located at the rear bottom 206 of the guide ring. Correspondingly, the guide plate outlet hole 19 is changed to be located at the bottom of the rear hole wall 112 of the mounting hole 11. The guide ring inlet hole 23 and the guide ring outlet hole 28 have approximately the same height but opposite orientations, and the guide groove 29 is a circumferential guide groove. The coolant flows circumferentially along the guide groove 29.
[0036] Fourth embodiment:
[0037] The fourth embodiment is largely the same as the first embodiment, except that, as shown in Figure 9, in the fourth embodiment, the guide ring outlet hole 28 is located at the top front 207 of the guide ring, and the guide ring inlet hole 23 and the guide ring outlet hole 28 are at different heights but have the same orientation. Correspondingly, the guide plate outlet hole 19 is changed to be located at the top of the front hole wall 111 of the mounting hole 11. The guide groove 29 is an axial guide groove. The coolant flows axially upward along the guide groove 29 to the middle part 208 of the guide ring, enters the gap 54 between the drill bit 9 and the middle part 208 of the guide ring, and then flows downward along the front wall of the drill bit 9. During this process, as shown in Figure 6, when the coolant is obstructed by debris during the flow, it will naturally flow circumferentially along the surface of the debris to the side wall 93 of the drill bit, and continue to flow downward through the gap 52 between the side part 204 of the guide ring and the drill bit 9 to the end 91 of the drill bit, thereby effectively cooling the drill bit 9.
[0038] Fifth Embodiment: The fifth embodiment is largely the same as the fourth embodiment, except that, as shown in Figure 10, the guide ring inlet hole 23 in the fifth embodiment is changed to be opened at the top front 207 of the guide ring, and the guide ring outlet hole 28 is changed to be opened at the bottom front 201 of the guide ring. Correspondingly, the guide plate inlet hole 12 is changed to be opened at the top front hole wall 111 of the mounting hole 11, and the guide plate outlet hole 19 is changed to be opened at the bottom front hole wall 111 of the mounting hole 11.
[0039] Referring to Figure 4, in a non-preferred embodiment, the turbulence block 291 can be omitted, or the turbulence block 291 and the flow guide 29 can be omitted.
[0040] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.
Claims
1. A digital guide plate for the mandible, wherein the plate body has mounting holes, and a guide ring is fixedly installed in the mounting holes. The guide ring has an axial central hole for a dental drill bit to extend into, and the wall of the central hole serves as an axial guide wall, axially guiding the dental drill bit, which has been inserted into the central hole, towards the drilling area. Its features are: The bottom of the mounting hole wall has a guide plate inlet hole, and the bottom of the guide ring has a guide ring inlet hole. The inlet end of the guide plate inlet hole is connected to the outside, and the outlet end is connected to the inlet end of the guide ring inlet hole. The outlet end of the guide ring inlet hole is connected to the bottom of the center hole. The guide plate is provided with a pipe connection part for connecting coolant pipes, and the pipe connection part surrounds the inlet end of the guide plate inlet hole.
2. The digital guide plate according to claim 1, characterized in that: The guide ring has a flow channel on its central hole wall to guide the axial and / or circumferential flow of coolant. The flow channel is connected to the outlet end of the guide ring's inlet hole.
3. The digital guide plate according to claim 2, characterized in that: The guide channel is specifically a spiral guide channel.
4. The digital guide plate according to claim 3, characterized in that: The guide channel has two channels with opposite directions of rotation.
5. The digital guide plate according to claim 2, characterized in that: The flow guide channel is equipped with turbulence blocks on its walls.
6. The digital guide plate according to any one of claims 2 to 5, characterized in that: The mounting hole has a guide plate outlet hole on its wall, and the guide ring has a guide ring outlet hole. The inlet end of the guide ring outlet hole is connected to the center hole, and the outlet end is connected to the inlet end of the guide plate outlet hole. The outlet end of the guide plate outlet hole is connected to the outside. The inlet end of the flow channel is connected to the inlet hole of the guide ring, and the outlet end is connected to the outlet hole of the guide ring.
7. The digital guide plate according to claim 6, characterized in that: The mounting holes on the plate are vertical holes, and the guide rings are vertical guide rings.
8. The digital guide plate according to claim 7, characterized in that: The liquid inlet and liquid outlet of the guide ring are at different heights and / or have different orientations.
9. A dental drilling tool, comprising a mandibular digital guide plate and a dental drill, the guide plate guiding the drill bit to the drilling area, and a coolant injector for dispensing coolant, characterized in that: As described in any one of claims 1 to 8, the coolant injector outlet is connected to a coolant pipe, and the end of the pipe is connected to the pipe connection part of the digital guide plate body, so as to guide the coolant output by the injector to the guide plate inlet hole of the guide plate body.