Axially drillable dental bone harvesting post tool

Abstract

The dental bone column taking tool capable of axial drilling of the utility model, the handle of the dental drilling machine is installed with a bone tissue ring cutting drill bit, the ring cutting drill bit is equipped with an annular cutting part with forward cutting edges, the annular cutting part has a central hole for accommodating a bone column, a central drill bit with forward cutting edges is arranged at the central hole for axial drilling of the bone column, the central drill bit is fixedly installed on the ring cutting drill bit and rotates synchronously with the ring cutting drill bit. In use, the dental drilling machine drives the ring cutting drill bit to rotate for annular cutting of the target bone tissue, at the same time, since the central drill bit is fixedly installed on the ring cutting drill bit, the ring cutting drill bit drives the central drill bit to rotate synchronously so as to drill a transplantation hole along the axial direction of the bone column on the bone column. In this process: since the bottom of the bone column is connected with the original bone tissue, the bone column cannot rotate and does not need to be clamped. The doctor uses the tool to drill the transplantation hole while drilling the bone column, does not need to drill the transplantation hole after taking out the bone column, and the operation difficulty is relatively low.

Description

Technical Field

[0001] This utility model relates to the field of dental tool technology, specifically to a dental bone harvesting column tool capable of axial drilling. Background Technology

[0002] A dental bone harvesting tool capable of axial drilling includes a dental drill. The drill's handle is fitted with a circumferential cutting bit, which has a forward-facing annular cutting section with a central hole and an observation window on its wall. In use, the dentist inserts the end of the handle into the patient's mouth, aligning the circumferential cutting section downwards with the target bone tissue. The drill is then activated, rotating the cutting bit to perform a circumferential cut on the target bone tissue, creating a circular groove and forming a corresponding cylindrical bone column. When the desired cutting depth is reached, the dentist closes the drill and lifts the handle, moving the cutting bit upwards. During this process, the bottom of the bone column remains connected to the original bone tissue and does not move upwards with the cutting bit but rather downwards beyond the annular cutting section. The dentist uses a sharp object inserted into the groove to pry the bone column, severing its connection to the original bone tissue. The bone column can then be removed using forceps.

[0003] After removing the bone column, the doctor needs to drill a graft hole in it to insert a miniature screw and then use the screw to fix the bone column to the bone graft area in the patient's mouth. In some cases, this graft hole needs to be set along the axis of the bone column. However, because the bone column is cylindrical, clamping it after removal and drilling along its axis is challenging. If the clamping force is too weak, the bone column may rotate during drilling; if the clamping force is too strong, it may damage the bone column, making the operation quite difficult. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dental bone harvesting tool that can drill axially. Using this tool to harvest bone pillars with axially set transplant holes, there is no need to drill transplant holes separately for the harvested bone pillars, and the operation is less difficult.

[0005] To solve the above-mentioned technical problems, the present invention provides a dental bone column tool capable of axial drilling, comprising a dental drill, a bone tissue circumferential cutting drill bit mounted on the handle of the dental drill, the circumferential cutting drill bit having an annular cutting part with the cutting edge facing forward, the handle driving the circumferential cutting drill bit to rotate and circumferentially cut out a bone column on the target bone tissue, the annular cutting part having a central hole for accommodating the bone column, a central drill bit with the cutting edge facing forward for axial drilling of the bone column at the central hole, the central drill bit being fixedly mounted on the circumferential cutting drill bit and rotating synchronously with the circumferential cutting drill bit.

[0006] Furthermore, the cutting edges of both the center drill bit and the circumferential drill bit are in the same position along the front-to-back axial direction.

[0007] Furthermore, the center drill bit is specifically detachably mounted on the trephine drill bit.

[0008] Furthermore, the circumferential drill bit has an installation cavity located behind the annular cutting section. The front wall of the installation cavity has a connecting hole that connects to the central hole of the annular cutting section, and the side wall of the installation cavity has a snap-fit ​​groove that connects to the outside. The rear of the central drill bit is equipped with a snap-fit ​​block. The rear of the central drill bit passes through the central hole and the connecting hole in sequence and is inserted into the installation cavity. It cannot move backward due to the obstruction of the rear wall of the installation cavity, nor can it move laterally due to the obstruction of the side wall of the installation cavity. The snap-fit ​​block snaps into the snap-fit ​​groove laterally outward, and cannot move forward due to the obstruction of the front wall of the snap-fit ​​groove. The central drill bit is detachably installed on the circumferential drill bit in this way. The end of the snap-fit ​​block is exposed through the snap-fit ​​groove and can be pushed inward laterally by a person. When the snap-fit ​​block is pushed outward laterally by a person and is no longer obstructed by the front wall of the snap-fit ​​groove, the central drill bit can be detached from the circumferential drill bit.

[0009] Furthermore, an openable door panel is provided at the connecting hole to block bone fragments generated during cutting.

[0010] Furthermore, the door panel is specifically located behind the connecting hole, hinged to the cavity wall, and can be rotated backward to open. The rear of the central drill bit pushes the door panel backward to insert it into the cavity.

[0011] Furthermore, the mounting cavity extends laterally to form a concealed panel cavity, which is then concealed when the door panel is rotated backward.

[0012] Furthermore, a reset drive is provided to drive the rotated and opened door panel to rotate back to its original position.

[0013] Furthermore, the center drill bit has a relief groove, and the end of the fastening block has an inclined wall with the rear end facing inward and the front end facing outward. When the rear part of the center drill bit passes through the center hole and enters the connecting hole, the wall of the center hole pushes the inclined wall of the fastening block, causing the fastening block to move laterally inward into the relief groove. The relief groove is equipped with a reset drive component that drives the fastening block to move laterally outward and reset. When the rear part of the center drill bit passes through the connecting hole and is inserted into the mounting cavity, the fastening block is driven by the reset drive component to extend laterally outward to the outside of the relief groove and fasten into the fastening groove.

[0014] Furthermore, the inclined wall at the end of the fastening block is recessed inward to form a disassembly hole for pushing the fastening block laterally inward and pushing it forward.

[0015] During use, the dental drill drives the circumferential drill bit to rotate and perform circumferential cutting on the target bone tissue. Simultaneously, because the central drill bit is fixedly mounted on the circumferential drill bit, the circumferential drill bit drives the central drill bit to rotate synchronously, thus drilling a graft hole along the axial direction of the bone column. During this process, since the bottom of the bone column is connected to the original bone tissue, the bone column does not rotate and does not require clamping. Using this tool, dentists can drill the graft hole while drilling the bone column, eliminating the need to drill a separate graft hole after removing the bone column, making the operation relatively simple. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a dental bone-harvesting tool.

[0017] Figure 2 This is a schematic diagram of the installation of the center drill bit.

[0018] Figure 3 This is a schematic diagram of cutting bone tissue with bone columns.

[0019] Figure 4 This is a cross-sectional view of a dental bone-harvesting tool cutting bone tissue.

[0020] Figure 5 yes Figure 4 A magnified view of a portion of the image, showing a larger area. Figure 4 Part A.

[0021] Figure 6 This is a schematic diagram of bone tissue with bone columns cut into it, and the bone columns in the diagram have axial graft holes.

[0022] Figure 7 This is a schematic diagram of a bone column with an axial graft hole being removed from the bone tissue.

[0023] Figure 8 This is a schematic diagram of the center drill bit, which mainly shows the rear part of the center drill bit.

[0024] Figure 9 This is a schematic diagram of a circumferential cutting drill bit, which mainly shows the middle part of the bit.

[0025] Figure 10 This is a schematic diagram showing the rear of the center drill bit entering the center hole of the circumferential drill bit.

[0026] Figure 11 This is a schematic diagram of the door panel being pushed open from the rear of the central drill bit.

[0027] Figure 12 This is a schematic diagram of the rear part of the central drill bit entering the installation cavity. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments.

[0029] See dental bone harvesting column tools that can be drilled axially. Figure 2 The device includes a dental drill 1 and a circumferential cutting drill bit 2. The dental drill 1 is existing technology; only the handle 11 of the dental drill 1 is shown in the figure. The rear of the circumferential cutting drill bit 2 is mounted at the end of the handle 11 of the dental drill 1. The front of the circumferential cutting drill bit 2 is an annular cutting section 21 with the cutting edge 211 facing forward. The annular cutting section 21 has a central hole 22, and an observation window 23 is opened on the wall of the central hole 22. Depth marking lines 215 are provided on the outer side of the annular cutting section 21. For use, see... Figure 2 and Figure 3 The dentist inserts the end of the handle 11 into the patient's mouth, aligning the annular cutting edge 21 of the circumferential drill bit 2 downwards with the target bone tissue. Then, the dental drill 1 is started. The handle 11 of the dental drill 1 drives the circumferential drill bit 2 to rotate and perform annular cutting on the target bone tissue, creating a circular groove 91 and a corresponding cylindrical bone column 92. During the cutting process, the cylindrical bone column 92 enters the central hole 22 of the circumferential drill bit 2 and is exposed through the observation window 23. The dentist observes the bone column 92 contained in the central hole 22 through the observation window 23 and judges the current cutting depth by observing the depth marking line 215. For example, if the expected cutting depth is equal to the distance between the rearmost depth marking line 215 and the cutting edge 211 at the front end of the annular cutting edge 211, then when the dentist observes that the rearmost depth marking line 215 is approximately embedded in the groove 91, they determine that the expected cutting depth has been reached. When the desired cutting depth is reached, the dentist shuts off the dental drill 1 and lifts the handle 11 to move the circumferential drill 2 upwards. During this process, the bottom of the bone column 92 remains connected to the original bone tissue, so it will not move upwards with the circumferential drill 2 but will instead dislodge downwards outside the annular cutting section 21 of the circumferential drill 2. The dentist uses a sharp object inserted into the circumferential groove 91 to pry the bone column 92 to disconnect it from the original bone tissue, and then the bone column 92 can be removed with forceps.

[0030] See Figure 7 After removing the bone column 92, the doctor needs to drill a graft hole 93 in it to allow for the insertion of a micro-screw to fix the bone column 92 to the bone graft area in the patient's mouth. In some cases, this graft hole 93 needs to be positioned along the axial direction of the bone column 92. However, because the bone column 92 is cylindrical, clamping it after removal and drilling a hole along its axial direction is quite difficult. Therefore, see... Figure 2This tool includes a central drill bit 3. In this embodiment, the central drill bit 3 is a twist drill; in other embodiments, it can be replaced with other types of drill bits, such as a ball drill bit, a tapered drill bit, or a flat-head drill. Before using the circumferential drill bit 3 to cut the target bone tissue, the doctor first determines the direction of the transplant hole 93. If the transplant hole 93 is radially positioned along the bone column 92, the doctor first drills the bone column 92 with the circumferential drill bit 2, then pries the bone column 92 with a sharp object, and then removes the bone column 92 with tweezers. After removal, another transplant hole 93 is drilled on the bone column 92. If the transplant hole 93 is as follows... Figure 7 As shown, it needs to be set along the axial direction of the bone column 92, then see Figure 2 The doctor then fixed the central drill bit 3 onto the trephine drill bit 2 with the cutting edge 311 facing forward. After installation, it was observed... Figure 1 The front part 31 of the center drill bit 3 is located at the center hole 22 of the annular cutting part 21 of the circumferential drill bit 2, and the cutting edge 311 at the front end of the center drill bit 3 is at the same position in the front-rear axial direction as the cutting edge 211 at the front end of the circumferential drill bit 2. See Figure 4 and Figure 6 While the dental drill 1 drives the circumferential drill bit 2 to rotate and perform circumferential cutting on the target bone tissue, the circumferential drill bit 2 drives the central drill bit 3 to rotate synchronously and drill an axial hole in the bone column 92. The central drill bit 3 drills a graft hole 93 at the center of the bone column 92, distributed along the axial direction of the bone column 92. During this process: because the bottom of the bone column 92 is connected to the original bone tissue, the bone column 92 will not rotate and does not need to be clamped. When the expected cutting depth is reached, the dentist turns off the dental drill 1 and lifts the handle 11 to move the circumferential drill bit 2 and the central drill bit 3 upward. At this time, the bone column 92 is basically hollow. The dentist inserts a sharp object into the circumferential groove 91 and pries the bone column 92 to break its connection with the target bone tissue. During this process, the force on the bone column 92 is mainly concentrated in the bottom edge area. The location where it breaks with the original bone tissue is usually not lower than the bottom edge of the graft hole 91. Figure 7 As shown, after the bone column 92 is removed, the central transplant hole 93 is essentially open. Using this tool, doctors can drill the transplant hole 93 simultaneously with the bone column 92, eliminating the need to drill the transplant hole 93 separately after removing the bone column 92, thus reducing the difficulty of the operation.

[0031] See Figure 5 and Figure 8A convex-shaped mounting cavity 23 is provided in the middle of the annular cutting drill 2, a quadrilateral communication hole 24 is opened on the front cavity wall of the mounting cavity 23, and communicates forward with the central hole 22 of the annular cutting part 21, and a fastening groove 25 communicating with the outside is opened on the right cavity wall 232 of the mounting cavity 23. A convex-shaped mounting block 33 is provided at the rear part of the central drill 3, the cross section of the front part 331 of the mounting block is quadrilateral, which has the same shape and size as the communication hole 24, a sliding groove 34 with a rightward opening is provided in the middle part 332 of the mounting block, and a sliding block 35 is installed in the sliding groove 34. Two opposite groove walls at the right end of the sliding groove 34 are respectively provided with two mounting holes 341, two limiting strips 342 are respectively installed in the two mounting holes 341, the two limiting strips 342 respectively extend into the sliding groove 34 and block the right side of the sliding block 35, so that the sliding block 35 cannot escape to the outside of the sliding groove 34 to the right, and a vacant part 343 is provided between the two limiting strips 342. A spring 36 is clamped between the left groove wall of the sliding groove 34 and the sliding block 35. A rightward protruding protrusion 351 is provided at the right end of the sliding block 35, the protrusion 351 passes rightward through the vacant part 343 between the two limiting strips 342 and is exposed outside the sliding groove 34. The right end of the protrusion 351 serves as the end of the sliding block 35, and is provided with an inclined right end wall 352 where a front end 353 is located on the right and a rear end 354 is located on the left. Since the rear end 354 is closer to the sliding groove 34 than the front end 353, the rear end 354 is located inward and the front end 353 is located outward. The rear part 333 of the convex-shaped mounting block 33 has the same shape and size as the rear part 233 of the convex-shaped mounting cavity 23.

[0032] See Figure 2 , when installing the central drill 3, a doctor holds the annular cutting drill 2 and the central drill 3 with two hands respectively, confirms that the fastening groove 25 of the annular cutting drill 2 and the protrusion 351 of the central drill 3 are located on the same side, then brings the annular cutting drill 2 and the central drill 3 close to each other. In this process, see Figure 10 and Figure 11 , the mounting block 33 of the central drill 3 passes through the central hole 22 and the communication hole 24 in sequence and is inserted into the mounting cavity 23. See Figure 11 and Figure 12 , during the process that the middle part 332 of the mounting block of the central drill 3 passes through the central hole 22 and enters the communication hole 24, the sliding groove 34 serves as a receding groove, the rear hole wall 221 of the central hole 22 pushes the right end wall 352 of the protrusion of the sliding block 35, the sliding block 35 slides leftward against the elastic force of the spring 36 under this pushing action until the protrusion 351 of the sliding block 35 retreats leftward into the sliding groove 34. The doctor continues to bring the annular cutting drill 2 and the central drill 3 close to each other, so that the mounting block 33 of the central drill 3 moves backward along the cavity wall of the mounting cavity 23. In this process, since the protrusion 351 is blocked by the right cavity wall 232 of the mounting cavity 23, the sliding block 35 will not slide and reset rightward under the elastic force of the spring 36. See Figure 5When the rear part 333 of the mounting block of the central drill bit 3 is inserted into the rear part 233 of the mounting cavity of the circumferential drill bit 2, the protrusion 351 of the slider 35 is aligned with the right-hand fastening groove 25. In this state: the central drill bit 3 is blocked by the rear cavity wall 234 of the mounting cavity 23 and cannot continue to move backward; it is also blocked by the side cavity wall 235 of the rear part 232 of the mounting cavity and cannot move laterally or rotate circumferentially. The spring 36 acts as the first reset drive, and the slider 35 acts as the fastening block. Since the protrusion 351 is no longer blocked by the right cavity wall 232 of the mounting cavity 23, the slider 35 slides to the right and resets under the elastic force of the spring 36. The central drill bit 3 is also blocked by the hole wall 241 of the connecting hole 24 and cannot move laterally or rotate circumferentially. During the reset process of slider 35, its protrusion 351 extends to the right and engages with the locking groove 25 outside the sliding groove 34. Blocked by the front groove wall 251 of the locking groove 25, it cannot move forward. Therefore, after slider 35 resets, the central drill bit 3 cannot move forward relative to the circumferential drill bit 2. The central drill bit 3 is thus fixedly mounted on the circumferential drill bit 2. In use, the dental drill 1 drives the circumferential drill bit 2 to rotate. The rear side groove wall 235 of the mounting cavity 232 of the circumferential drill bit 2 and the wall 241 of the connecting hole 24 jointly drive the mounting block 33 of the central drill bit 3 to rotate, thereby driving the central drill bit 3 to rotate synchronously with the circumferential drill bit 2.

[0033] See Figure 5 and Figure 8 After the center drill bit 3 is installed, the right end of the protrusion 351 of its slider 35 is exposed through the fastening groove 25. The right end wall 352 of the protrusion 351 is recessed to the left to form a disassembly hole 355. See also Figure 5 and Figure 12 When the doctor needs to disassemble the central drill bit 3, a sharp object is inserted through the snap-fit ​​groove 25 into the disassembly hole 355 to push the protrusion 351 of the slider 35 to the left. This causes the slider 35 to slide to the left against the spring force 36 until the protrusion 351 exits the snap-fit ​​groove 25 and enters the slide groove 34, thus no longer being blocked by the front groove wall 251 of the snap-fit ​​groove 25. Then, the sharp object is used to push the slider 35 forward, causing the central drill bit 3 to move forward a short distance. In this state, because the protrusion 351 is blocked by the right cavity wall 232 of the mounting cavity 23, the slider 35 will not slide back to the right under the spring force 36. The doctor then removes the sharp object from the disassembly hole 355 and the snap-fit ​​groove 25, and then pulls the central drill bit 3 forward by hand, causing it to disengage from the trephine drill bit 2. See [link to relevant documentation]. Figure 2 In this way, the center drill bit 3 can be removed from the circumferential drill bit 2, thus completing the disassembly of the center drill bit 3.

[0034] See Figure 9 and Figure 10Without the central drill bit 3 installed, when using the circumferential drill bit 2 to cut bone tissue, bone fragments generated during cutting can easily clog the mounting cavity 23 if they enter through the connecting hole 24, affecting the installation of the central drill bit 3. Therefore, a door plate 26 is provided behind the connecting hole 24. The left end of the door plate 26 is hinged to the wall of the mounting cavity 23. The front part of the mounting cavity 23 extends to the left to form a concealed plate cavity 27. The opening 271 of the concealed plate cavity 27 faces left and connects to the outside. A cover plate 28 is fastened to the opening 271 by a snap-fit ​​275. A spring clip 29 is provided in the concealed plate cavity 27. The left end 291 of the spring clip 29 connects to the cover plate 28, and the right end 292 connects to the door plate 26. Normally, the door panel 26, driven by the spring clip 29, covers the rear side of the connecting hole 24. Therefore, when the center drill bit 3 is not installed, and the circumferential drill bit 2 is used to cut bone tissue, the door panel 26 can effectively block the bone fragments generated during cutting, preventing these fragments from entering the mounting cavity 23 through the connecting hole 24. See... Figure 11 The door panel 26 can be rotated to the left rearward side to open. Only when the door panel 26 is open can the mounting cavity 23 connect to the center hole 22 of the annular cutting part 21 through the connecting hole 24. When the center drill bit 3 is installed, its mounting block 33 rear part 333 passes through the center hole 22 and the connecting hole 24 of the annular cutting part 21 in sequence, pushing the door panel 26 backward, causing the door panel 26 to overcome the elastic force of the spring piece 29 and rotate to the left rearward side to open. Figure 12 After the door panel 26 is opened, it is retracted into the concealed panel cavity 27, without obstructing the rearward insertion of the mounting block 33 of the central drill bit 3 into the mounting cavity 23. See Figure 10 The spring clip 29, acting as the second reset drive component, drives the door plate 26 to rotate and reset, once again covering the rear side of the connecting hole 24, during the disassembly of the central drill bit 3. (See...) Figure 9 and Figure 10 When the doctor needs to clean the installation cavity 23, he releases the latch 275 from the cover plate 28 and removes the cover plate 28 to expose the cavity opening 271 of the hidden plate cavity 27. Then he removes the hinge shaft 261 of the door panel 26. The spring piece 29 and the door panel 26 can then be removed from the installation cavity 23 through the cavity opening 271 of the hidden plate cavity 27, and then the installation cavity 23 can be cleaned.

[0035] This view Figure 8 In this embodiment, the right end wall 352 of the protrusion 351 of the central drill bit 3 is recessed to the left to form a disassembly hole 355. When the doctor disassembles the central drill bit 3, he inserts a sharp object into the disassembly hole 355 to push the slider 35 to the left and to move the slider 35 forward. During this process, the sharp object is blocked by the wall of the disassembly hole 355 and will not slide accidentally, thus ensuring high safety. In a non-preferred embodiment, the disassembly hole 355 can be omitted. However, if this is done, when the doctor disassembles the central drill bit 3, he pushes the right end wall 352 of the protrusion 351 to the left with a sharp object. During this process, if the sharp object slides along the inclined right end wall 352 of the protrusion 351, it may accidentally injure someone.

[0036] In other embodiments, a U-shaped spring with its opening facing backwards can be used instead of a spring. See also Figure 5 , Figure 11 and Figure 12 As the mounting block 332 of the central drill bit 3 passes through the central hole 22 and enters the connecting hole 24, the rear wall 221 of the central hole 22 pushes against the right end wall 352 of the protrusion of the slider 35. Under this pushing action, the slider 35 overcomes the elastic force of the spring and slides to the left. When the rear part 333 of the mounting block of the central drill bit 3 is inserted into the rear part 233 of the mounting cavity of the circumferential drill bit 2, the slider 35 slides to the right and resets under the elastic force of the spring.

[0037] 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 dental bone column extraction tool capable of axial drilling, comprising a dental drill, wherein a circumferential cutting drill bit is mounted on the handle of the dental drill, the circumferential cutting drill bit has an annular cutting section with the cutting edge facing forward, the handle drives the circumferential cutting drill bit to rotate and circumferentially cut a bone column from the target bone tissue, the annular cutting section having a central hole for accommodating the bone column, characterized in that: A central drill bit with its cutting edge facing forward is provided at the central hole for axial drilling of the bone column. The central drill bit is fixedly mounted on the circumferential drill bit and rotates synchronously with it. Specifically, the central drill bit is detachably mounted on the circumferential drill bit. The circumferential drill bit has a mounting cavity located behind the annular cutting section. The front wall of the mounting cavity has a connecting hole facing forward, connecting to the central hole of the annular cutting section. The side wall of the mounting cavity has a snap-fit ​​groove connecting to the outside. A snap-fit ​​block is provided at the rear of the central drill bit, and the rear of the central drill bit passes through it sequentially. The center hole and connecting hole are inserted into the mounting cavity. They cannot move backward due to the obstruction of the rear cavity wall of the mounting cavity, nor can they move laterally due to the obstruction of the side cavity wall of the mounting cavity. The snap-fit ​​block is snapped into the snap-fit ​​groove with its side facing outward. It cannot move forward due to the obstruction of the front groove wall of the snap-fit ​​groove. The center drill bit is detachably mounted on the circumferential drill bit in this manner. The end of the snap-fit ​​block is exposed through the snap-fit ​​groove for the user to push it inward from the side. When the snap-fit ​​block is pushed outward from the side by the user and is no longer obstructed by the front groove wall of the snap-fit ​​groove, the center drill bit can be detached from the circumferential drill bit.

2. The dental post removal tool according to claim 1, wherein: An openable door panel is provided at the connecting hole to block bone fragments generated during cutting.

3. The dental bone post extraction tool according to claim 2, wherein: The door panel is specifically located behind the connecting hole, hinged to the cavity wall, and can be rotated backward to open. The rear of the central drill bit pushes the door panel backward to insert it into the cavity.

4. The dental bone post extraction tool according to claim 3, wherein: The mounting cavity extends laterally to form a hidden panel cavity. When the door panel is rotated backward and opened, it is hidden in the hidden panel cavity.

5. The dental post-osteotomyl tool according to claim 3, wherein: A reset drive is provided to drive the rotated and opened door panel to rotate back to its original position.

6. The dental post-osteotomyl tool according to claim 1, wherein: The center drill bit has a relief groove, and the end of the fastening block has an inclined wall with the rear end facing inward and the front end facing outward. When the rear part of the center drill bit passes through the center hole and enters the connecting hole, the wall of the center hole pushes the inclined wall of the fastening block, causing the fastening block to move laterally inward into the relief groove. The relief groove is equipped with a reset drive component that drives the fastening block to move laterally outward and reset. When the rear part of the center drill bit passes through the connecting hole and is inserted into the mounting cavity, the fastening block is driven by the reset drive component to extend laterally outward and snap into the fastening groove.

7. The dental bone post extraction tool according to claim 6, wherein: The inclined wall at the end of the fastening block is recessed inward to form a disassembly hole, allowing a person to push the fastening block inward laterally and push it forward.

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