Dental bur, implant handpiece and dental drilling device

Abstract

The invention provides a dental bur, an implant handpiece and a dental drilling device. The dental bur comprises a sleeve, and the axial first end of the sleeve is configured to be in driving connection with a driving part of the implant handpiece so as to be driven by the driving part to rotate; the first axial end of the cutting rod is located in the sleeve, the cutting rod is telescopically arranged relative to the sleeve in the axial direction, and the cutting rod is configured to have a synchronous rotation state with the sleeve; and the cutting part is connected to the second axial end of the cutting rod, and the cutting part is close to or far away from the second axial end of the sleeve along with the telescopic movement of the cutting rod relative to the sleeve.

Description

Technical Field

[0001] The present application relates to oral instruments, and in particular to a dental bur, an implant handpiece and a dental drilling device. Background Art

[0002] During dental implant surgery, especially in the molar area close to the pharynx, limited space conditions seriously affect the accuracy and efficiency of the surgery.

[0003] In the related art, the preparation of implant holes is achieved by a dental drilling device formed by a fixed-length dental bur and an implant mobile phone. Although the dental drilling device meets the basic surgical needs to a certain extent, the limitations of the fixed-length dental bur are undoubtedly apparent in areas with narrow operating space in the oral cavity, such as the molar area near the pharynx. For example, when a fixed-length dental bur is used, if a 10mm deep implant cavity is to be prepared, at least 20mm of operating space is often required, which is particularly insufficient in the narrow molar area, and the actual operation is difficult. In order to improve the accuracy of implantation, dentists usually combine auxiliary tools such as bur limit guide devices (such as implant guides) or surgical robots during the operation, but the bur limit guide device or the robotic arm of the surgical robot further increases the demand for operating space, requiring the patient to open the mouth wider. When the opening is not enough to accommodate the head and auxiliary tools of the dental bur of the dental drilling device, the bur angle can only be deflected, sacrificing the most ideal implant angle and site to complete the implant surgery, which may affect the surgical effect and the patient's long-term oral health.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present application is to provide a dental bur, an implant handpiece and a dental drilling device, which aims to solve the problem that when the patient's opening is not large enough to accommodate the head of the dental bur and auxiliary tools of the dental drilling device, the bur angle can only be deflected, sacrificing the most ideal implantation angle and position.

[0006] The first aspect of the present application provides a dental bur, comprising: a sleeve, wherein the axial first end of the sleeve is configured to be drivingly connected to a driving portion of an implant mobile phone so as to rotate under the drive of the driving portion; a cutting rod, wherein the axial first end of the cutting rod is located in the sleeve and the cutting rod is telescopically arranged relative to the sleeve in the axial direction, and the cutting rod is configured to have a synchronous rotation state with the sleeve; and a cutting portion, connected to the axial second end of the cutting rod, and the cutting portion follows the telescopic movement of the cutting rod relative to the sleeve to approach or move away from the axial second end of the sleeve.

[0007] In some embodiments of the dental bur, the sleeve includes a slot disposed at the first axial end, and the sleeve is configured to be drivingly connected to the driving portion through the slot.

[0008] In some embodiments of the dental needle, the dental needle also includes a connecting rod; the cutting rod has a mounting groove arranged axially and having an opening at the axial first end of the cutting rod, the connecting rod is located in the mounting groove so that the cutting rod and the connecting rod can move relative to each other axially and include a mounting section extending out of the opening and the axial first end of the sleeve, and the cutting rod is configured to be drivingly connected to the driving part through the mounting section.

[0009] In some embodiments of the dental bur, the radial outer side of the mounting groove is open, and the connecting rod is located between the sleeve and the cutting rod.

[0010] In some embodiments of the dental bur, the dental bur includes a linkage limiting portion configured to enable the sleeve and the cutting rod to rotate relative to each other while the cutting rod is axially extended and retracted relative to the sleeve.

[0011] In some embodiments of the dental bur, the linkage limiting portion is located between the sleeve and the cutting rod, and includes: a spiral track, which is arranged on one of the sleeve and the cutting rod; and a first matching body, which cooperates with the spiral track and is arranged on the other of the sleeve and the cutting rod.

[0012] In some embodiments of the dental bur, the cutting rod has a flange, which slides with the inner wall of the sleeve and divides the inner cavity of the sleeve into a first cavity near the axial first end of the sleeve and a second cavity near the axial second end of the sleeve, and the cutting rod is configured to expand and contract relative to the sleeve according to the fluid pressure in the first cavity and the second cavity.

[0013] In some embodiments of the dental bur, the dental bur includes a rotation-stopping limit portion, and the rotation-stopping limit portion is configured to relatively fix the cutting rod and the sleeve in the circumferential direction.

[0014] In some embodiments of the dental needle, the stop limit portion is located between the cutting rod and the sleeve, and includes: an axial track, which is arranged on one of the cutting rod and the sleeve; and a second matching body, which cooperates with the axial track and is arranged on the other of the cutting rod and the sleeve.

[0015] In some embodiments of the dental needle, the dental needle also includes a fluid inlet and outlet module, which is relatively rotatably connected to the sleeve and includes a first flow port and a second flow port, and the first flow port is connected to the first cavity; the sleeve also includes an internal fluid channel, the first end of the internal fluid channel is connected to the second flow port, and the second end of the internal fluid channel is connected to the second cavity.

[0016] In some embodiments of the dental needle, the dental needle also includes an isolation ring, which is located between the fluid inlet and outlet module and the sleeve and slidably cooperates with at least one of the fluid inlet and outlet module and the sleeve, and the isolation ring is configured to seal the gap between the fluid inlet and outlet module and the sleeve.

[0017] The second aspect of the present application provides an implant mobile phone for use with the dental needle of the first aspect of the present application, the implant mobile phone comprising: a driving part, the driving part is configured to be drivingly connected to the sleeve and the cutting rod of the dental needle to drive the sleeve to rotate; and a telescopic control part, the telescopic control part is configured to drive the cutting rod to telescope axially relative to the sleeve.

[0018] In some embodiments of the implant mobile phone, the telescopic control part includes: a gear transmission mechanism, including a sun gear, a planetary gear, an inner ring gear and a gear rack, the sun gear is drivingly connected to the driving part to rotate under the drive of the driving part, the sun gear has a sun gear connecting part, and the sun gear connecting part is used to be connected to the cutting rod without relative rotation, the planetary gear is connected to the gear rack and meshes with the sun gear and the inner ring gear, the gear rack has a gear rack connecting part, and the gear rack connecting part is used to be connected to the sleeve without relative rotation; and a braking part, having a braking state and a braking release state, in the braking state, the inner ring gear stops rotating under the restriction of the braking part, and in the braking release state, the inner ring gear rotates driven by the sun gear and the planetary gear.

[0019] In some embodiments of the implant mobile phone, the telescopic control part includes: a first fluid pipeline, configured to be connected to the first cavity to input fluid into the first cavity or receive fluid from the first cavity; and a second fluid pipeline, configured to be connected to the second cavity to input fluid into the second cavity or receive fluid from the second cavity.

[0020] In some embodiments of the implantation mobile phone, the implantation mobile phone further comprises a force feedback module, and the force feedback module is configured to detect the resistance encountered by the transmission shaft of the driving part of the implantation mobile phone during the cutting process of the cutting part.

[0021] The third aspect of the present application provides a dental drilling device, comprising: the dental bur of the first aspect of the present application; and an implant mobile phone of the second aspect of the present application, wherein the dental bur is installed on the implant mobile phone, wherein the sleeve and the cutting rod of the dental bur are drivingly connected to the driving part of the implant mobile phone.

[0022] The dental bur provided by the present application comprises a sleeve and a cutting rod telescopically arranged in the cavity of the sleeve. The cutting portion connected to the cutting rod is driven by the cutting rod to move closer to or away from the axial second end of the sleeve. Therefore, the demand for operating space can be reduced when preparing the implant cavity. On the one hand, it is beneficial to directly use a dental drilling device including the dental bur of the present application and a matching implant mobile phone without the need for auxiliary tools to prepare the implant cavity. On the other hand, even if auxiliary tools are required to participate in the preparation of the implant cavity, it is beneficial to provide more working space for the auxiliary tools, thereby facilitating the angle of the dental bur to be in the best state as much as possible, achieving a more ideal implantation angle and position, thereby facilitating improving the positioning accuracy of the implant, improving the safety and accuracy of the operation, and reducing potential damage to healthy tissues, so that the implant operation achieves better results and helps patients maintain oral health for a long time after dental implants.

[0023] The implant handpiece and dental drilling device provided in the present application have the advantages of the dental bur provided in the present application.

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of dental burs according to some embodiments of the present application.

[0027] Figure 2 This is a schematic diagram of the combined structure of the telescopic control part of the implant mobile phone and the dental needle in some embodiments of the present application.

[0028] Figure 3 This is a structural schematic diagram of an angle of the telescopic control part of the implant mobile phone in some embodiments of the present application.

[0029] Figure 4 for Figure 3 A schematic structural diagram of the telescopic control portion of the implant mobile phone in another angle of the embodiment shown.

[0030] Figure 5This is a schematic diagram of the principle structure of the braking part and its control mechanism of the telescopic control part of the implant mobile phone in some embodiments of the present application.

[0031] Figure 6 This is a schematic diagram of the principle structure of the driving part of the implant mobile phone in some embodiments of the present application.

[0032] Figure 7 This is a schematic structural diagram of a dental bur at an angle in some embodiments of the present application.

[0033] Figure 8 for Figure 7 A schematic structural diagram of the dental bur of the illustrated embodiment at another angle.

[0034] Fig. 9 for Figure 7 A schematic cross-sectional structure diagram of a dental bur according to the illustrated embodiment.

[0035] Fig.10 This is a schematic diagram of the principle structure of the telescopic control unit and the driving unit of the implant mobile phone in some embodiments of the present application.

[0036] Fig.11 This is a schematic diagram of the principle structure of the force feedback module of the implant mobile phone in some embodiments of the present application.

[0037] Fig.12 This is a block diagram of the composition of the force feedback module of the implant mobile phone in some embodiments of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figure 1 , Figures 7 to 9 As shown, an embodiment of the present application provides a dental bur 1. The dental bur 1 includes a sleeve 11, a cutting rod 12 and a cutting portion 13. The axial first end of the sleeve 11 is configured to be drivingly connected to the driving portion 23 of the implant mobile phone 2 so as to rotate under the drive of the driving portion 23. The axial first end of the cutting rod 12 is located in the sleeve 11 and the cutting rod 12 is telescopically arranged relative to the sleeve 11 in the axial direction. The cutting rod 12 is configured to have a synchronous rotation state with the sleeve 11. The cutting portion 13 is connected to the axial second end of the cutting rod 12. The cutting portion 13 approaches or moves away from the axial second end of the sleeve 11 following the telescopic movement of the cutting rod 12 relative to the sleeve 11.

[0044] The dental bur 1 provided in the present application comprises a sleeve 11 and a cutting rod 12 which is telescopically arranged in the cavity of the sleeve 11. The cutting portion 13 connected to the cutting rod 12 is driven by the cutting rod 12 to move closer to or away from the axial second end of the sleeve 11. Therefore, the demand for operating space can be reduced when preparing the implant cavity. On the one hand, it is beneficial to directly use a dental drilling device including the dental bur 1 of the present application and a matching implant mobile phone 2 without the need for auxiliary tools to prepare the implant cavity. On the other hand, even if auxiliary tools are required to participate in the preparation of the implant cavity, it is beneficial to provide more working space for the auxiliary tools, thereby facilitating the angle of the dental bur 1 to be in the best state as much as possible, achieving a more ideal implantation angle and position, thereby facilitating improving the position accuracy of the implant, improving the safety and accuracy of the operation, and reducing potential damage to healthy tissues, so that the implant operation achieves better results and helps patients maintain oral health for a long time after dental implantation.

[0045] like Figure 1 As shown, in some embodiments of the dental bur, the sleeve 11 includes a slot 111 disposed at the first axial end, and the sleeve 11 is configured to be drivingly connected to the driving portion 23 through the slot 111 .

[0046] The sleeve 11 is drivingly connected to the driving part 23 via the card slot 111, which is beneficial to the rapid disassembly and assembly and accurate connection of the dental needle 1 and the implant handpiece 2, thereby facilitating the improvement of the preparation efficiency of the implant cavity.

[0047] like Figure 1 As shown, in some embodiments of the dental bur, the dental bur 1 also includes a connecting rod 14, the cutting rod 12 has a mounting groove 120 which is axially arranged and has an opening at the axial first end of the cutting rod 12, the connecting rod 14 is located in the mounting groove 120 so that the cutting rod 12 and the connecting rod 14 can move relative to each other in the axial direction and include a mounting section extending out of the opening and the axial first end of the sleeve 11, and the cutting rod 12 is configured to be drivingly connected to the driving part 23 through the mounting section.

[0048] By cooperating with the connecting rod 14 and the mounting groove 120, the cutting rod 12 and the cutting part 13 connected thereto can be driven and connected with the driving part 23 through the connecting rod 14 and the driving part 23 of the implant mobile phone 2, so that the cutting rod 13 and the cutting part 13 can be driven to rotate through the driving part 23, thereby realizing the cutting action of the cutting part 13 to achieve the preparation of the implant cavity.

[0049] like Figure 1 As shown, in some embodiments of the dental bur, the radial outer side of the mounting groove 120 is open, and the connecting rod 14 is located between the sleeve 11 and the cutting rod 12 .

[0050] The radial outer side of the installation groove 120 is open, which is beneficial for the driving part 23 to generate a larger torque when driving the cutting rod 12 through the connecting rod 14, and is also beneficial for the preparation of the installation groove 120 and the installation of the connecting rod 14 in the installation groove 120.

[0051] like Figure 1 As shown, in some embodiments of the dental bur, the dental bur includes a linkage limiting portion, which is configured to enable the sleeve 11 and the cutting rod 12 to rotate relative to each other while the cutting rod 12 is axially extended and retracted relative to the sleeve 11.

[0052] By providing the linkage limiting portion, the rotation of the cutting rod 12 relative to the sleeve 11 can realize the telescopic action of the cutting rod 12 relative to the sleeve 11 .

[0053] like Figure 1 As shown, in some embodiments of the dental bur, the linkage limiting portion is located between the sleeve 11 and the cutting rod 12. The linkage limiting portion includes a spiral track 121 and a first matching body 15. The spiral track 121 is provided on one of the sleeve 11 and the cutting rod 12. The first matching body 15 cooperates with the spiral track 121 and is provided on the other of the sleeve 11 and the cutting rod 12.

[0054] The linkage limiting part is arranged between the sleeve 11 and the cutting rod 12, and no special arrangement space is required for the linkage limiting part. The linkage limiting part includes a spiral track 121 and a first matching body 15, which is conducive to increasing the stability and certainty of the telescopic action of the cutting rod 12 relative to the sleeve 11.

[0055] The spiral track 121 is, for example, a convex track or a groove track, and the first matching body 15 is, for example, a sliding groove or a rolling body matched with the convex track or a sliding block or a rolling body matched with the groove track.

[0056] like Figures 7 to 9 As shown, in some embodiments of the dental bur, the cutting rod 12 has a flange 122. The flange 122 is slidably matched with the inner wall of the sleeve 11 and divides the inner cavity of the sleeve 11 into a first cavity 11A near the axial first end of the sleeve 11 and a second cavity 11B near the axial second end of the sleeve 11. The cutting rod 12 is configured to expand and contract relative to the sleeve 11 according to the fluid pressure in the first cavity 11A and the second cavity 11B.

[0057] The above arrangement can realize the extension and retraction of the cutting rod 12 relative to the sleeve 11 by fluid-driven operation, thereby driving the cutting portion 13 to move closer to or away from the second axial end of the sleeve 11 through the extension and retraction of the cutting rod 12, which is beneficial to adjusting the operating space required for preparing the implant cavity.

[0058] like Figures 7 to 9As shown, in some embodiments of the dental bur, the dental bur 1 includes a rotation-stopping limiter, which is configured to relatively fix the cutting rod 12 and the sleeve 11 in the circumferential direction.

[0059] By setting a stop limit portion, the cutting rod 12 can rotate along with the rotation of the sleeve 11, so that the driving portion 23 of the implant mobile phone 2 can simultaneously drive the sleeve 11, the cutting rod 12 and the cutting portion 13 connected to the cutting rod 12 to rotate, thereby realizing the cutting action of the cutting portion 13 to achieve implant cavity preparation.

[0060] like Figures 7 to 9 As shown, in some embodiments of the dental bur, the anti-rotation limiter is located between the cutting rod 12 and the sleeve 11. The anti-rotation limiter includes an axial track 112 and a second matching body 1221. The axial track 112 is arranged on one of the cutting rod 12 and the sleeve 11. The second matching body 1221 cooperates with the axial track 112 and is arranged on the other of the cutting rod 12 and the sleeve 11.

[0061] The anti-rotation limit part is arranged between the sleeve 11 and the cutting rod 12, and there is no need to provide a special arrangement space for the anti-rotation limit part. The anti-rotation limit part includes an axial track 112 and a second matching body 1221, which is conducive to providing guidance for the telescopic action of the cutting rod 12 relative to the sleeve 11, thereby facilitating the improvement of the stability and certainty of the telescopic action of the cutting rod 12 relative to the sleeve 11.

[0062] The axial track is, for example, a convex track or a groove track, and the second matching body is, for example, a sliding groove or a rolling body matched with the convex track, or a sliding block or a rolling body matched with the groove track.

[0063] like Figures 7 to 9 As shown, in some embodiments of the dental bur, the dental bur 1 further includes a fluid inlet and outlet module 18. The fluid inlet and outlet module 18 is relatively rotatably connected to the sleeve 11. The fluid inlet and outlet module 18 includes a first flow port 181 and a second flow port 182. The first flow port 181 is connected to the first cavity 11A. The sleeve 11 further includes an internal fluid channel 113. The first end of the internal fluid channel 113 is connected to the second flow port 182, and the second end of the internal fluid channel 113 is connected to the second cavity 11B.

[0064] By providing the fluid inlet and outlet module 18, the fluid inlet and outlet module 18 can rotate relative to the sleeve 11, so that when the sleeve 11 rotates, the fluid inlet and outlet module 18 does not rotate with the sleeve 11, thereby facilitating the fluid pipeline connected to the fluid inlet and outlet module 18 (such as Fig.10 The first fluid pipeline 241 and the second fluid pipeline 242 shown do not need to be rotated, which facilitates the arrangement of the fluid pipelines and hydraulic components connected to the fluid pipelines.

[0065] like Figures 7 to 9 As shown, in some embodiments of the dental needle, the dental needle 1 also includes an isolation ring 17, which is located between the fluid inlet and outlet module 18 and the sleeve 11 and is slidably matched with at least one of the fluid inlet and outlet module 18 and the sleeve 11, and the isolation ring 17 is configured to seal the gap between the fluid inlet and outlet module 18 and the sleeve 11.

[0066] The isolation ring 17 is provided to facilitate the sealing connection between the fluid inlet and outlet module 18 and the sleeve 11 on the basis of relative rotation, thereby facilitating the relative rotation of the fluid inlet and outlet module 18 and the sleeve 11 while preventing fluid leakage.

[0067] like Figures 2 to 6 , Fig.10 As shown, the second aspect of the present application provides an implant handpiece for use with the dental bur of the first aspect of the present application. The implant handpiece includes a drive unit 23 and a telescopic control unit. The drive unit 23 is configured to drive the sleeve 11 of the dental bur 1 and the cutting rod 12. The telescopic control unit is configured to drive the cutting rod 12 to telescope relative to the sleeve 11 in the axial direction.

[0068] The implantation handpiece 2 provided in the present application has the advantages of the dental bur 1 provided in the present application. Among them, a telescopic control part is provided on the implantation handpiece, and the cutting rod 12 can be telescoped relative to the sleeve 11 in the axial direction by operating the telescopic control part, so that the cutting part 13 can be driven to approach or move away from the axial second end of the sleeve 11 by telescoping the cutting rod 12, which is beneficial to reducing the operating space required for preparing the implantation cavity.

[0069] like Figures 2 to 6 As shown, in some embodiments of the implant handpiece, the telescopic control unit is configured to drive the cutting rod 12 of the dental bur to telescope relative to the sleeve 11 in the axial direction. The telescopic control unit includes a gear transmission mechanism 21 and a brake unit 22. The gear transmission mechanism 21 includes a sun gear 211, a planetary gear 212, an inner gear ring 213 and a gear rack 214. The sun gear 211 is drivingly connected to the driving unit 23 to rotate under the drive of the driving unit 23. The sun gear 211 has a sun gear connecting portion, which is used to be connected to the cutting rod 12 without relative rotation. The planetary gear 212 is connected to the gear rack 214 and meshes with the sun gear 211 and the inner gear ring 213. The gear rack 214 has a gear rack connecting portion, which is used to be connected to the sleeve 11 without relative rotation. The brake unit 22 has a braking state and a brake release state. In the braking state, the inner gear ring 213 stops rotating under the restriction of the brake unit 22. In the brake release state, the internal gear ring 213 rotates driven by the sun gear 211 and the planetary gears 212 .

[0070] The telescopic control part includes a gear transmission mechanism 21 and a braking part 22. When the braking part 22 is in a braking state, when the sun gear 211 rotates, the inner ring 213 does not rotate, so that the gear transmission mechanism 21 forms a planetary gear system, and the planetary gear 212 and the gear carrier 214 form a differential rotation with the sun gear 211, that is, there is a relative rotation between the sun gear 211 and the planetary carrier 214. With the help of the relative rotation between the sun gear 211 and the inner ring 214, the telescopic action of the cutting rod 12 relative to the sleeve 11 can be realized under the restriction of the linkage restriction part. When the braking part 22 is in the brake release state, the movement of the inner ring 213 is not restricted, so that when the sun gear 211 rotates, the gear frame 214 connected to the planetary gear 212 and the sun gear 211 have no relative rotation, and thus there is no relative rotation between the sleeve 11 and the cutting rod 12 respectively connected to the sun gear 211 and the gear frame 214, thereby generating synchronous rotation, and the cutting rod 12 will not perform telescopic movement relative to the sleeve 11, and the axial second end position of the cutting part 13 relative to the sleeve 11 remains unchanged, so that the implant cavity can be prepared at a relatively determined position relative to the sleeve 11.

[0071] like Fig.10 As shown, in some embodiments of the implant handpiece, the telescopic control part is configured to telescope the cutting rod 12 of the dental needle relative to the sleeve 11 in the axial direction. The telescopic control part includes a first fluid pipeline 241 and a second fluid pipeline 242. The first fluid pipeline 241 is configured to communicate with the first cavity 11A to input fluid to the first cavity 11A or receive fluid from the first cavity 11A; and the second fluid pipeline 242 is configured to communicate with the second cavity 11B to input fluid to the second cavity 11B or receive fluid from the second cavity 11B.

[0072] By setting up a first fluid pipeline 241 and a second fluid pipeline 242, the cutting rod 12 can be extended relative to the sleeve 11 by inputting pressurized fluid into the first fluid pipeline 241 and receiving fluid from the second fluid pipeline 242, and the cutting rod 12 can be retracted relative to the sleeve 11 by inputting pressurized fluid into the second fluid pipeline 242 and receiving fluid from the first fluid pipeline 241.

[0073] like Fig.11 and Fig.12 As shown, in some embodiments of the implant mobile phone, the implant mobile phone 2 further includes a force feedback module 27, and the force feedback module 27 is configured to detect the resistance encountered by the transmission shaft 231 of the driving part 23 of the implant mobile phone during the cutting process of the cutting part 13.

[0074] The force feedback module 27 is used to detect the resistance encountered by the transmission shaft 231 of the driving part 23 of the implant mobile phone 2 during the cutting process of the cutting part 13, that is, to detect the resistance encountered by the cutting part 13 when preparing the implant cavity. According to the resistance, the bone density of the cutting part, the cutting depth and other information can be judged, thereby facilitating more accurate and efficient preparation of the implant cavity.

[0075] like Figures 1 to 12 As shown, the third aspect of the present application provides a dental drilling device, comprising: the dental bur 1 of the first aspect of the present application; and the implant mobile phone 2 of the second aspect of the present application, the dental bur 1 is installed on the implant mobile phone 2, wherein the sleeve 11 and the cutting rod 12 of the dental bur 1 are drivingly connected to the driving part 23 of the implant mobile phone 2.

[0076] The dental drilling device provided in the present application has the advantages of the dental bur 1 and the implant handpiece 2 provided in the present application.

[0077] The following combination Figures 1 to 12 The embodiments of the present application are described in more detail.

[0078] Figures 1 to 6 The dental bur 1, the implant handpiece 2 and the dental drilling device according to some embodiments of the present application are shown.

[0079] like Figures 1 to 6 As shown, an embodiment of the present application provides a dental bur 1, an implant mobile phone 2, and a dental drilling device including the dental bur 1 and the implant mobile phone 2.

[0080] like Figure 1 As shown, the dental bur 1 mainly includes a sleeve 11, a cutting rod 12, a cutting portion 13, a connecting rod 14 and a linkage limiting portion.

[0081] The first axial end of the sleeve 11 is configured to be drivingly connected to the driving part 23 of the implant mobile phone 2 so as to rotate under the drive of the driving part 23. The sleeve 11 includes a clamping groove 111 disposed at the first axial end, and the sleeve 11 is configured to be drivingly connected to the driving part 23 through the clamping groove 111. The clamping groove 111 is disposed on the outer circumference of the sleeve 11 throughout the entire circumference, so as to facilitate quick matching with the clamping strip 2141 without finding a matching angle.

[0082] The axial first end of the cutting rod 12 is located in the sleeve 11 and the cutting rod 12 is axially telescopically arranged relative to the sleeve 11. The cutting rod 12 is configured to have a synchronous rotation state with the sleeve 11. The cutting rod 12 has a mounting groove 120 arranged in the axial direction and having an opening at the axial first end of the cutting rod 12. The connecting rod 14 is located in the mounting groove 120 so that the cutting rod 12 and the connecting rod 14 can move relative to each other in the axial direction and includes a mounting section extending out of the opening and the axial first end of the sleeve 11. The cutting rod 12 is configured to be drivingly connected to the driving part 23 through the mounting section. The radial outer side of the mounting groove 120 is open, and the connecting rod 14 is located between the sleeve 11 and the cutting rod 12.

[0083] The cutting portion 13 is connected to the axial second end of the cutting rod 12. The cutting portion 13 moves closer to or farther from the axial second end of the sleeve 11 following the telescopic movement of the cutting rod 12 relative to the sleeve 11. The cutting portion 13 includes a plurality of cutting edges 131 uniformly arranged along the circumferential direction. For example, in this embodiment, the cutting portion 13 includes six cutting edges 131.

[0084] The dental bur 1 includes a linkage limiting portion, which is configured to make the sleeve 11 and the cutting rod 12 rotate relative to each other while the cutting rod 12 is axially extended and retracted relative to the sleeve 11. The linkage limiting portion is located between the sleeve 11 and the cutting rod 12. The linkage limiting portion includes a spiral track 121 and a slider as a first matching body 15. The spiral track 121 is a groove-type track provided on the cutting rod 12. The slider cooperates with the spiral track 121 and is provided on the sleeve 11. In this embodiment, the cross-section of the groove-type track is semicircular, and the slider is provided as a hemispherical protrusion.

[0085] Figures 2 to 6 The planting mobile phone 2 shown is Figure 1 The dental bur 1 shown is used in conjunction with the dental bur 1.

[0086] The implant handpiece includes a driving unit 23 and a telescopic control unit. The driving unit 23 is also configured to be drivingly connected to the sleeve 11 and the cutting rod 12 of the dental bur 1 to drive the sleeve 11 and the cutting rod 12 to rotate. The telescopic control unit is configured to drive the cutting rod 12 to telescope relative to the sleeve 11 in the axial direction.

[0087] like Figures 2 to 6 As shown, the telescopic control part includes a gear transmission mechanism 21 and a braking part 22 .

[0088] The gear transmission mechanism 21 includes a sun gear 211 , planetary gears 212 , an internal gear ring 213 , a gear carrier 214 and a gear shaft 215 .

[0089] The sun gear 211 is drivingly connected to the driving portion 23 so as to rotate under the driving of the driving portion 23. The sun gear 211 has a sun gear connecting portion for connecting to the cutting rod 12 in a non-rotatable manner.

[0090] like Figure 1 As shown, the gear shaft 215 is coaxially fixedly arranged at the axial first end of the sun gear 211 with the sun gear 211, and a rotation-stopping plane 2151 is arranged on the gear shaft 215. The driving part 23 of the implantation mobile phone 2 includes a driving shaft 231 matched with the gear shaft 215, and the driving shaft 231 has a mounting opening, the mounting opening is matched with the gear shaft 215, and the inner wall of the mounting opening includes a rotation-stopping wall surface matched with the rotation-stopping plane 2151. The driving connection between the driving part 23 and the sun gear 211 is realized by the matching of the mounting opening and the gear shaft 215. The sun gear connecting part includes a fixing hole 2111 arranged on the end face of the axial second end of the sun gear 211. The connecting section of the connecting rod 14 extending out of the axial first end of the sleeve 11 is installed in the fixing hole 2111, so that the connecting rod 14 is installed on the sun gear 211. The connecting rod 14 is connected to the cutting rod 12 in a non-rotatable manner, thereby achieving a non-rotatable connection between the cutting rod 12 and the sun gear 211 , thereby enabling a driving connection between the cutting rod 12 and the driving portion 23 .

[0091] The other structures of the driving part 23 except the driving shaft 231 can adopt the corresponding structure of the driving part of the implant mobile phone in the related technology.

[0092] The planetary gears 212 are connected to the gear carrier 214 and mesh with the sun gear 211 and the inner ring gear 213. The gear carrier 214 has a gear carrier connecting portion, which is used to be connected to the sleeve 11 in a non-rotatable manner.

[0093] The brake part 22 has a braking state and a brake release state. In the braking state, the inner gear ring 213 stops rotating under the restriction of the brake part 22. In the brake release state, the inner gear ring 213 rotates under the drive of the sun gear 211 and the planetary gear 212.

[0094] Figures 2 to 6 In the illustrated embodiment, the brake unit 22 includes a brake block 221, a brake line 222, and a brake control unit 223. The brake block 221 is disposed outside the inner gear ring 213, for example, disposed radially outward or axially outward of the inner gear ring 213. The number of the brake block 221 can be multiple, for example Figures 2 to 6 In the embodiment shown, the number of brake blocks 221 is three, and the three brake blocks 221 are uniformly arranged on the radial outer side of the inner gear ring 213 along the circumferential direction. The brake wires are arranged in a one-to-one correspondence with the brake blocks 221. In the embodiment of the present application, the three brake wires 222 respectively control the three brake blocks 221. The brake control unit 223 is, for example, a brake control button or a brake control finger provided on the housing of the planting mobile phone 2. By pressing and releasing the brake control button or hooking or releasing the brake control finger, the brake wire 222 is tightened or loosened to control the action of the brake block 221 so that the brake unit 22 is switched between the braking state and the brake release state.

[0095] In an embodiment not shown in the figure, the braking portion 22 can use other methods to control the brake block 221. For example, a hydraulic drive mechanism, a pneumatic drive mechanism or an electromagnetic drive mechanism can be used to control the movement of the brake block 221 to achieve the switching of the braking portion 22 between its braking state and the brake release state.

[0096] The dental drilling device comprises a dental bur 1 and an implant handpiece 2. The dental bur 1 is mounted on the implant handpiece 2. The sleeve 11 and the cutting rod 12 of the dental bur 1 are drivingly connected to the driving part 23 of the implant handpiece 2.

[0097] The dental drilling device of the embodiment of the present application comprises a dental bur 1 and an implant handpiece 2. The assembly and operation method of the dental drilling device are described as follows.

[0098] In the initial state of the dental bur 1, the cutting rod 12 is in a retracted state relative to the sleeve 11, the mounting section of the connecting rod 14 is aligned with the fixing hole 2111 of the sun gear 211, and the mounting section is inserted into the fixing hole 2111. At the same time, the slot 111 on the sleeve 11 and the clamping strip 2141 on the gear rack 214 cooperate with each other, so that the dental bur 1 is installed on the implant mobile phone 2 to form a dental drilling device.

[0099] The sun gear 211 rotates synchronously with the cutting rod 12 through the connecting rod 14, and the gear frame 214 rotates synchronously with the sleeve 11 through the clamping groove 111 and the clamping strip 2141. The implantation mobile phone 2 is connected to the gear shaft 215 connected to the sun gear 211 through the driving shaft 231 of the driving part 23, and the power of the driving part is input into the sun gear 211 through the cooperation of the gear plane 2151 of the gear shaft 215 and the anti-rotation wall surface of the driving shaft 231.

[0100] When the brake part 22 is in the brake release state, its brake block 221 is separated from the inner gear ring 213, and there is no relative rotation between the sun gear 211 and the gear frame 214 of the gear transmission mechanism 21. The sun gear 211 drives the cutting rod 12 and the cutting part 13 connected to the cutting rod 12 and the gear frame 214 and the sleeve 11 connected to the gear frame 214 to rotate synchronously, that is, the driving part 23 drives the dental needle 1 to rotate as a whole through the gear transmission mechanism 21, and the cutting rod 12 will not extend out of the sleeve 11.

[0101] When the braking part 22 is in a braking state, its braking block 221 fits with the inner gear ring 213 to lock the inner gear ring 213. At this time, the gear transmission mechanism 21 forms a planetary gear system with the inner gear ring 213 fixed. The sun gear 211 and the gear frame 214 rotate in the same direction with differential speed. The cutting rod 12 connected to the sun gear 211 through the connecting rod 14 and the sleeve 11 connected to the gear frame 214 rotate relative to each other. The slider serving as the first matching body 15 moves along the spiral track 121. At this time, the cutting rod 12 extends from the axial second end of the sleeve 11 to the outside of the sleeve 11 under the joint constraints of the linkage limit part and the connecting rod 14. The cutting part 13 moves in the direction away from the axial second end of the sleeve 11, and the length of the dental needle 1 increases.

[0102] When the braking part 22 is in a braking state and the sun gear 211 rotates in the opposite direction driven by the driving part 23, the cutting rod 12 retracts inward relative to the sleeve 11, and the cutting part 13 moves toward the second axial end of the sleeve 11, and the length of the dental bur 1 becomes smaller.

[0103] The brake block 221 is controlled by a brake control button and a brake line 222 serving as a brake control unit 223. According to actual operation requirements, the brake block 221 is controlled to lock the inner gear ring 213, thereby controlling whether the cutting rod 12 is extended or retracted relative to the sleeve 11, thereby controlling the length of the dental needle 1.

[0104] Figures 7 to 12 The dental bur 1, the implant handpiece 2 and the dental drilling device according to some embodiments of the present application are shown.

[0105] like Figures 7 to 12 As shown, an embodiment of the present application provides a dental bur 1, an implant mobile phone 2, and a dental drilling device including the dental bur 1 and the implant mobile phone 2.

[0106] like Figures 7 to 9 As shown, the dental bur 1 includes a sleeve 11 , a cutting rod 12 , a cutting portion 13 , a spacer ring 17 and a fluid inlet and outlet module 18 .

[0107] The first axial end of the sleeve 11 is configured to be drivingly connected to the driving portion 23 of the implantation mobile phone 2 so as to rotate under the drive of the driving portion 23 .

[0108] The axial first end of the cutting rod 12 is located in the sleeve 11 and the cutting rod 12 is axially telescopically arranged relative to the sleeve 11. Figures 7 to 9As shown, the cutting rod 12 has a flange 122, which is slidably matched with the inner wall of the sleeve 11 and divides the inner cavity of the sleeve 11 into a first cavity 11A near the axial first end of the sleeve 11 and a second cavity 11B near the axial second end of the sleeve 11. The cutting rod 12 is configured to expand and contract relative to the sleeve 11 according to the fluid pressure in the first cavity 11A and the second cavity 11B. The fluid can be, for example, oil.

[0109] The cutting rod 12 is configured to have a synchronous rotation state with the sleeve 11. In this embodiment, the dental bur 1 includes a stop-rotation limit portion, which is configured to relatively fix the cutting rod 12 and the sleeve 11 in the circumferential direction. The stop-rotation limit portion is located between the cutting rod 12 and the sleeve 11. The stop-rotation limit portion includes an axial track 112 and a second matching body 1221. The axial track 112 is a groove-type track provided on the sleeve 11. The second matching body 1221 cooperates with the axial track 112 and is a protrusion 1221 provided on the flange 122 of the cutting rod 12. Due to the provision of the stop-rotation limit portion, the cutting rod 12 and the cutting portion 13 connected to the cutting rod 12 always rotate synchronously with the sleeve 11, so that the dental bur 1 can rotate under the drive of the driving part 23.

[0110] The cutting portion 13 is connected to the axial second end of the cutting rod 12. The cutting portion 13 moves closer to or farther from the axial second end of the sleeve 11 following the telescopic movement of the cutting rod 12 relative to the sleeve 11. The cutting portion 13 includes a plurality of cutting edges 131 uniformly arranged along the circumferential direction. For example, in this embodiment, the cutting portion 13 includes six cutting edges 131.

[0111] The fluid inlet and outlet module 18 is connected to the sleeve 11 so as to be relatively rotatable. The fluid inlet and outlet module 18 includes a first flow port 181 and a second flow port 182. The first flow port 181 is in communication with the first cavity 11A. The sleeve 11 also includes an internal fluid channel 113, a first end of the internal fluid channel 113 is in communication with the second flow port 182, and a second end of the internal fluid channel 113 is in communication with the second cavity 11B.

[0112] The isolation ring 17 is located between the fluid inlet and outlet module 18 and the sleeve 11 and is slidably matched with at least one of the fluid inlet and outlet module 18 and the sleeve 11 . The isolation ring 17 is configured to seal the gap between the fluid inlet and outlet module 18 and the sleeve 11 .

[0113] like Fig.10 As shown, the implant handpiece 2 is used in conjunction with the dental bur 1. The implant handpiece 2 includes a driving unit 23 and a telescopic control unit.

[0114] The driving portion 23 is configured to be drivingly connected to the sleeve 11 and the cutting rod 12 of the dental bur 1. A connecting shaft 114 is provided at the axial first end of the sleeve 11, and the connecting shaft 114 has a stop-rotation plane 1141. The driving shaft 231 of the driving portion 23 of the implant mobile phone 2 has a mounting opening, which cooperates with the connecting shaft 114, and the inner wall of the mounting opening includes a stop-rotation wall surface that cooperates with the stop-rotation plane 1141. In addition, the implant mobile phone 2 also includes an accommodating space 25 communicated with the mounting opening, and the axial first end of the sleeve 11 connected to its connecting shaft 114 can extend into the accommodating space 25. In order to fix the axial relative position between the sleeve 11 of the dental bur 1 and the implant mobile phone 2, a similar Figures 1 to 6 The slot and the strip of the embodiment shown. For example, the slot is arranged on the circumferential outer side of the first axial end of the sleeve 11, and the strip is arranged on the inner wall of the accommodating space 25. After the sleeve 11 extends into the accommodating space 25, the slot and the strip cooperate together to determine the axial position of the sleeve 11 and the accommodating space 25. It can be seen that the driving connection between the driving part 23 and the connecting shaft 114 and the sleeve 11 can be achieved through the cooperation between the mounting port and the connecting shaft 114. Since the cutting rod 12 and the sleeve 11 rotate synchronously under the restriction of the anti-rotation limiter, the dental bur 1 can be driven to rotate as a whole through the driving part 23.

[0115] The other structures of the driving part 23 except the driving shaft 231 can adopt the corresponding structure of the driving part of the implant mobile phone in the related technology.

[0116] The telescopic control unit is configured to drive the cutting rod 12 to telescope relative to the sleeve 11 in the axial direction. Fig.10 As shown, the telescopic control part includes a first fluid pipeline 241 and a second fluid pipeline 242. The first fluid pipeline 241 is configured as a first cavity connected to the first cavity 11A to input fluid to the first cavity 11A or receive fluid from the first cavity 11A; and the second fluid pipeline 242 is configured to be connected to the second cavity 11B to input fluid to the second cavity 11B or receive fluid from the second cavity 11B. In this embodiment, the first fluid pipeline 241 is in fluid communication with the first cavity 11A through the first first flow port 18181 of the fluid inlet and outlet module 18; the second fluid pipeline 242 is in fluid communication with the second cavity 11B through the second first flow port 18182 of the fluid inlet and outlet module 18. The cutting rod 12 can be extended relative to the sleeve 11 by inputting pressurized fluid into the first fluid pipeline 241 and receiving fluid from the second fluid pipeline 242. The cutting rod 12 is retracted relative to the sleeve 11 by inputting pressurized fluid into the second fluid line 242 and receiving fluid from the first fluid line 241 .

[0117] like Fig.11 and Fig.12As shown, the implantation mobile phone 2 of the embodiment of the present application may include a force feedback module 27, and the force feedback module 27 is configured to detect the resistance encountered by the transmission shaft 231 of the driving part 23 of the implantation mobile phone 2 during the cutting process of the cutting part 13.

[0118] like Fig.11 and Fig.12 As shown, the force feedback module 27 may include, for example, a piezoelectric sensor 271 disposed between the anti-rotation plane 1141 of the connecting shaft 114 of the sleeve 11 and the anti-rotation wall 2311 of the driving shaft 231, a controller 272 connected to the piezoelectric sensor 271 by signal, and a display screen 273 connected to the controller 272 by signal. The controller 272 is configured to determine the resistance encountered by the driving shaft 231 during the cutting process of the cutting part 13 according to the detection information of the piezoelectric sensor, and to judge the bone density, cutting depth and other information of the cutting part accordingly. The display screen is connected to the controller signal and is configured to display the aforementioned resistance, bone density, cutting depth and the like for the doctor to determine which operation to take next.

[0119] The controller of the embodiment of the present application can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof for performing the functions described in the present disclosure.

[0120] Similar to this application, Figures 1 to 6 In the embodiment shown, a force feedback module may also be provided. The force feedback module may include, for example, a piezoelectric sensor disposed between the anti-rotation plane 2151 of the gear shaft 215 and the anti-rotation wall surface of the drive shaft 231, a controller connected to the piezoelectric sensor signal, and a display screen connected to the controller.

[0121] The dental drilling device of the embodiment of the present application comprises a dental bur 1 and an implant handpiece 2. The assembly and operation method of the dental drilling device are described as follows.

[0122] In the initial state, the dental bur 1 has the cutting rod 12 retracted relative to the sleeve 11. The sleeve 11 is extended into the accommodating space 25 of the implant handpiece 2, the connecting shaft 114 of the sleeve 11 is matched with the mounting opening of the driving shaft 231 of the driving part 23, the anti-rotation plane 1141 is matched with the anti-rotation wall surface of the mounting opening, and the card groove at the first axial end of the sleeve 11 is matched with the card strip on the inner wall of the accommodating space 24, so that the dental bur 1 is quickly connected with the implant handpiece 2 to form the dental drilling device of the embodiment of the present application. The implant handpiece 2 drives the dental bur 1 to rotate through the driving part 23.

[0123] After the dental bur 1 is connected to the implant handpiece 2, the first fluid pipeline 241 is connected to the first flow port 181, and the second fluid pipeline 242 is connected to the first flow port 182. The first flow port 181 is connected to the first cavity 11A, and the second flow port 182 is connected to the second cavity 11B through the internal fluid channel 113. The cutting rod 12 is controlled to extend and retract relative to the sleeve 11 by the oil entering and exiting the first cavity 11A and the second cavity 11B.

[0124] When the first fluid pipeline 241 delivers oil to the first cavity 11A through the first flow port 181, and the second fluid pipeline 242 receives oil from the second cavity 11B through the internal fluid channel 113 and the second flow port 182, the cutting rod 12 extends outward from the axial second end of the sleeve 11 along the axial track 112 under the restriction of the stop limit portion, and the cutting portion 13 moves in the direction away from the axial second end of the sleeve 11, and the length of the dental needle 1 increases.

[0125] On the contrary, when the first fluid pipeline 241 receives oil from the first cavity 11A through the first flow port 181, and the second fluid pipeline 242 transports oil to the second cavity 11B through the second flow port 182 and the internal fluid channel 113, the cutting rod 12 retracts toward the interior of the sleeve 11 along the axial track 112 under the restriction of the stop limit portion, and the cutting portion 13 moves toward the direction close to the second axial end of the sleeve 11, and the length of the dental needle 1 becomes smaller.

[0126] The fluid inlet and outlet module 18 realizes dynamic and static separation through the isolation ring 17, the connecting shaft 114 of the sleeve 11 and the fluid pipeline. That is, when the sleeve 11, the cutting rod 12 and the cutting part 13 connected to the cutting rod 12 rotate at high speed, the fluid inlet and outlet module 18 does not rotate with the dental needle 1, thereby avoiding the fluid pipelines from being entangled with each other.

[0127] According to the above description, the dental bur, implant handpiece and dental drilling device of the embodiments of the present application have at least one of the following advantages:

[0128] The length of the dental bur can be changed. For example, when the cutting rod is fully retracted into the sleeve, the length of the dental bur can be half of that of the traditional bur. The operating space required for preparing the implant cavity is smaller, and it can adapt to patients with smaller openings. It is beneficial to keep the angle of the dental bur as optimal as possible, and achieve a more ideal implantation angle and position, thereby improving the positioning accuracy of the implant, improving the safety and accuracy of the operation, and reducing potential damage to healthy tissues, so that the implant operation can achieve better results and help patients maintain oral health for a long time after dental implants.

[0129] It helps to shorten the operation time, reduce the number of times the dental needles are replaced and the waiting time, making the entire operation process smoother and faster.

[0130] It is beneficial to improve the universality and convenience of surgery. Dental needles can adapt to various surgical needs, reduce the operating burden of medical personnel, and reduce the complexity of surgery.

[0131] It reduces the use of consumable materials, reduces surgical costs, and improves economic benefits.

[0132] By setting up a force feedback module, real-time monitoring and intelligent adjustment of the surgical process can be achieved, thereby improving the safety and success rate of the surgery.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A dental needle, characterized in that: include: A sleeve (11), wherein an axial first end of the sleeve (11) is configured to be drivingly connected to a driving portion (23) of an implant mobile phone (2) so as to rotate under the drive of the driving portion (23); a cutting rod (12), wherein an axial first end of the cutting rod (12) is located in the sleeve (11) and the cutting rod (12) is telescopically arranged relative to the sleeve (11) in the axial direction, and the cutting rod (12) is configured to have a synchronous rotation state with the sleeve (11); and The cutting portion (13) is connected to the axial second end of the cutting rod (12), and the cutting portion (13) moves closer to or farther away from the axial second end of the sleeve (11) following the telescopic movement of the cutting rod (12) relative to the sleeve (11).

2. The dental bur according to claim 1, characterized in that: The sleeve (11) comprises a clamping groove (111) arranged at a first axial end, and the sleeve (11) is configured to be drivingly connected to the driving portion (23) via the clamping groove (111).

3. The dental bur according to claim 1, characterized in that: The dental bur (1) further comprises a connecting rod (14); The cutting rod (12) has a mounting groove (120) which is arranged in the axial direction and has an opening at the axial first end of the cutting rod (12); the connecting rod (14) is located in the mounting groove (120) so that the cutting rod (12) and the connecting rod (14) can move relative to each other in the axial direction and includes a mounting section extending out of the opening and the axial first end of the sleeve (11); the cutting rod (12) is configured to be drivingly connected to the driving portion (23) through the mounting section.

4. The dental bur according to claim 3, characterized in that: The radial outer side of the installation groove (120) is open, and the connecting rod (14) is located between the sleeve (11) and the cutting rod (12).

5. The dental bur according to any one of claims 1 to 4, characterized in that: The invention comprises a linkage limiting portion, wherein the linkage limiting portion is configured to cause the sleeve (11) and the cutting rod (12) to rotate relative to each other while the cutting rod (12) is axially extended and retracted relative to the sleeve (11).

6. The dental bur according to claim 5, characterized in that: The linkage limiting portion is located between the sleeve (11) and the cutting rod (12), and comprises: A spiral track (121) disposed on one of the sleeve (11) and the cutting rod (12); and A first matching body (15) matches the spiral track (121) and is arranged on the other of the sleeve (11) and the cutting rod (12).

7. The dental bur according to claim 1, characterized in that: The cutting rod (12) has a flange (122), and the flange (122) is slidably matched with the inner wall of the sleeve (11) and divides the inner cavity of the sleeve (11) into a first cavity (11A) close to the axial first end of the sleeve (11) and a second cavity (11B) close to the axial second end of the sleeve (11). The cutting rod (12) is configured to expand and contract relative to the sleeve (11) according to the fluid pressure in the first cavity (11A) and the second cavity (11B).

8. The dental bur according to claim 7, characterized in that: The dental bur (1) comprises a rotation-stopping limit portion, wherein the rotation-stopping limit portion is configured to relatively fix the cutting rod (12) and the sleeve (11) in the circumferential direction.

9. The dental bur according to claim 8, characterized in that: The anti-rotation limiting portion is located between the cutting rod (12) and the sleeve (11), and comprises: an axial track (112) disposed on one of the cutting rod (12) and the sleeve (11); and The second matching body (1221) matches the axial track (112) and is arranged on the other side of the cutting rod (12) and the sleeve (11).

10. The dental bur according to any one of claims 7 to 9, characterized in that: The dental bur (1) further comprises a fluid inlet and outlet module (18), the fluid inlet and outlet module (18) being connected to the sleeve (11) in a relatively rotatable manner, comprising a first flow port (181) and a second flow port (182), the first flow port (181) being in communication with the first cavity (11A); The sleeve (11) further comprises an internal fluid channel (113), a first end of the internal fluid channel (113) being in communication with the second flow port (182), and a second end of the internal fluid channel (113) being in communication with the second cavity (11B).

11. The dental bur according to claim 10, characterized in that: The dental bur (1) further comprises an isolating ring (17), which is located between the fluid inlet and outlet module (18) and the sleeve (11) and is slidably matched with at least one of the fluid inlet and outlet module (18) and the sleeve (11), and the isolating ring (17) is configured to seal the gap between the fluid inlet and outlet module (18) and the sleeve (11).

12. An implant handpiece for use with the dental bur according to any one of claims 1 to 11, characterized in that: The planting mobile phone includes: a driving unit (23), the driving unit (23) being configured to be drivingly connected to the sleeve (11) and the cutting rod (12) of the dental bur (1); and A telescopic control unit, wherein the telescopic control unit is configured to drive the cutting rod (12) to telescope relative to the sleeve (11) in the axial direction.

13. The implantation mobile phone according to claim 12, characterized in that: The telescopic control unit is configured to drive the cutting rod (12) of the dental bur according to any one of claims 1 to 6 to telescope axially relative to the sleeve (11), and the telescopic control unit comprises: A gear transmission mechanism (21), comprising a sun gear (211), planetary gears (212), an inner gear ring (213) and a gear carrier (214), wherein the sun gear (211) is drivingly connected to the driving portion (23) so as to rotate under the drive of the driving portion (23), the sun gear (211) having a sun gear connecting portion, the sun gear connecting portion being used to be connected to the cutting rod (12) in a non-rotatable manner, the planetary gears (212) being connected to the gear carrier (214) and meshing with the sun gear (211) and the inner gear ring (213), the gear carrier (214) having a gear carrier connecting portion, the gear carrier connecting portion being used to be connected to the sleeve (11) in a non-rotatable manner; and The braking part (22) has a braking state and a braking release state. In the braking state, the inner gear ring (213) stops rotating under the restriction of the braking part (22). In the braking release state, the inner gear ring (213) rotates driven by the sun gear (211) and the planetary gear (212).

14. The implantation mobile phone according to claim 12, characterized in that: The telescopic control unit is configured to drive the cutting rod (12) of the dental bur according to any one of claims 1 and 7 to 11 to telescope axially relative to the sleeve (11), and the telescopic control unit comprises: A first fluid pipeline (241) is configured to communicate with the first cavity (11A) to input fluid into the first cavity (11A) or receive fluid from the first cavity (11A); and The second fluid pipeline (242) is configured to communicate with the second cavity (11B) to input fluid into the second cavity (11B) or receive fluid from the second cavity (11B).

15. The implantation mobile phone according to any one of claims 12 to 14, characterized in that: The implantation mobile phone (2) further comprises a force feedback module (27), wherein the force feedback module (27) is configured to detect the resistance encountered by the transmission shaft (231) of the driving part (23) of the implantation mobile phone during the cutting process of the cutting part (13).

16. A dental drilling device, characterized in that: include: The dental bur (1) according to any one of claims 1 to 11; and The implant handpiece (2) according to any one of claims 12 to 15, wherein the dental bur (1) is mounted on the implant handpiece (2), wherein the sleeve (11) and the cutting rod (12) of the dental bur (1) are drivingly connected to the driving part (23) of the implant handpiece (2).

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