Dental implant based on bidirectional thread structure

Abstract

The invention belongs to the technical field of dental implants, and particularly relates to a dental implant based on a two-way threaded structure, the dental implant comprises a dental implant main body, an abutment and a fixing screw, the dental implant main body comprises an upper implant and a lower implant, the top of the lower implant is provided with at least one inclined guide groove, the bottom of the upper implant is provided with at least one connecting insert block, and the lower implant is provided with at least one inclined guide groove. The connecting insertion block is inserted into the inclined guide groove to construct a connecting chain of the upper implant and the lower implant; the top end thread and the crown end thread are staggered, and the crown end thread is attached to the top of the planting hole thread, so that the crown end thread and the top end thread are staggered and self-locked, the purpose of automatically locking the dental implant main body is achieved, the top end thread of the upper implant is utilized to ensure the mechanical stability of connection, and the crown end thread and the top end thread of the lower implant are staggered and self-locked, so that the dental implant main body is automatically locked. The whole dental implant main body is kept stable, so that dislocation and looseness of the dental implant main body and the planting hole are prevented, and the planting effect of the dental implant is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of dental implants, and specifically relates to a dental implant based on a bidirectional thread structure. Background Art

[0002] An implant is the matrix for medical denture implantation and is a key part of dental implants for fixing dentures. When implanting dentures, the implant is usually placed into the jawbone part. Implants are usually made of titanium alloy, and then the implant and the dental crown are connected through an abutment. During the implanting process of the implant, the implanting stability of the implant affects the stability of the dental crown, thereby affecting the quality and effect of denture implantation.

[0003] After retrieval, a Chinese patent with the publication number CN102860878A discloses an improved medical implant, including a body part implanted into human tissue, a base post for fixing an artificial denture, and a neck connecting the body part and the base post. Threads are provided on the surface of the body part. The pitch of the first thread at the lower end of the body part is large, and the pitch of the second thread at the upper end of the body part is small. By setting different pitches for the first thread and the second thread, the implantation becomes more convenient and stable.

[0004] However, for the above implant with threads of different pitches, since the thread pitches at the top end and the crown part are different, when screwing in the implant, the feeding amplitudes of the top end and the crown part of the implant are different, which easily causes damage to the jawbone part, resulting in a fragile connection between the implant and the implant hole in the jawbone part. Therefore, the implant is prone to looseness during the dental crown occlusion process, thus affecting the stability of the implant. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dental implant based on a bidirectional thread structure, so that the overall dental implant body remains stable, thereby preventing the dental implant body from becoming dislocated and loose from the implant hole, and further ensuring the implantation effect of the dental implant.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dental implant based on a bidirectional thread structure includes a dental implant body, an abutment, and a fixing screw. The dental implant body includes an upper implant and a lower implant. At least one inclined guiding groove is opened at the top of the lower implant, and at least one connecting insert block is provided at the bottom of the upper implant. The connecting insert block is inserted into the inclined guiding groove to construct a connection chain between the upper implant and the lower implant. During the separation process of the upper implant and the lower implant, the lower implant is misaligned and offset in the reverse direction of the inclination of the connecting insert block and the inclined guiding groove.

[0008] The interior of the upper implant is provided with an internal thread groove, the fixing screw is threadedly connected to the interior of the internal thread groove, the bottom of the fixing screw is movably connected to a top pin, and a top compression spring is arranged between the top pin and the fixing screw.

[0009] Preferably, the exterior of the upper implant is provided with top threads, the exterior of the lower implant is provided with crown threads, the lower implant is arranged in a frustum shape, the taper angle of the lower implant is 8°, when the upper implant and the lower implant construct a complete dental implant body, the top threads and the crown threads are arranged as a smooth and continuous thread structure, the top threads are arranged as wide-body flat and low threads, the crown threads are arranged as narrow-body sharp-edge high threads, and the width of the top threads and the crown threads smoothly transitions.

[0010] Preferably, at least one spiral groove is provided on the exterior of both the upper implant and the lower implant.

[0011] Preferably, a socket groove is provided at the top of the upper implant, a socket ring is fixedly connected to the bottom of the abutment, the socket ring and the socket groove are radially limited and inserted, and the fixing screw passes through the abutment and the socket ring and is threadedly connected to the internal thread groove.

[0012] Preferably, a movable groove and a top pressure groove are provided at the inner bottom of the lower implant, a connecting ring is movably connected to the interior of the movable groove, the movable groove is provided with a straight groove opening, the groove opening direction is adapted to the direction of the inclined guiding groove, the outer wall of the connecting ring is attached to the inner wall of the bottom of the upper implant, the fixing screw passes through the connecting ring, and the bottom of the top pin presses against the interior of the top pressure groove.

[0013] Preferably, a limiting ring is fixedly connected to the exterior of the connecting ring, a limiting groove is provided on the inner wall of the movable groove, and the limiting ring is clamped in the interior of the limiting groove.

[0014] Preferably, the connecting ring is arranged as two split ring bodies, the two split ring bodies are bonded with glue, limiting rings are provided on the exteriors of the two split ring bodies, and installation notches are provided on the limiting rings of the two split ring bodies.

[0015] Preferably, a convex block is fixedly connected to the exterior of the connecting ring, a limiting hole is provided on the exterior of the lower implant, the convex block is inserted outside the limiting hole, and when the upper implant and the lower implant are misaligned and offset, the convex block extends through to the outside of the limiting hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The top thread of the present invention is misaligned with the crown thread. The crown thread fits onto the top of the implant hole thread, so that the crown thread and the top thread are misaligned and self-locked, achieving the purpose of automatically locking the dental implant body. By dividing the top thread and the crown thread into two misaligned threads with opposite spiral directions, the mechanical stability of the connection is ensured by the top thread of the upper implant. Through the misalignment and self-locking of the crown thread and the top thread of the lower implant, the overall dental implant body is kept stable, preventing the dental implant body from becoming dislocated or loose in the implant hole, and thus ensuring the implantation effect of the dental implant.

[0018] 2. The present invention isolates the internal thread groove of the upper implant and the implant hole through the connecting ring, ensuring the sealing performance of the internal thread groove during the dental implantation process, avoiding foreign object interference inside the internal thread groove. At the same time, the connecting ring further ensures the stability of the feeding process of the fixing screw, thus ensuring the stability and safety during the dental implantation process.

[0019] 3. When the connecting ring and the movable groove are horizontally offset, the connecting ring pushes the convex block through the limiting hole, causing the convex block to protrude outside the lower implant, forming a limiting block. Through the combined use of the convex block and the crown thread, the connection stability between the lower implant and the implant hole is further ensured, thus ensuring the implantation stability of the dental implant body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the dental implant body, abutment and fixing screw of the present invention;

[0021] Figure 2 is a schematic structural diagram of the assembled state of the dental implant body, abutment and fixing screw of the present invention;

[0022] Figure 3 is a schematic structural diagram of the disassembled state of the dental implant body, abutment and fixing screw of the present invention;

[0023] Figure 4 is a schematic cross-sectional view of the separation of the dental implant body and the abutment of the present invention;

[0024] Figure 5 is a schematic cross-sectional view of the assembled state of the dental implant body, abutment and fixing screw of the present invention;

[0025] Figure 6 is a schematic structural diagram of the connection surface between the upper implant and the lower implant of the present invention;

[0026] Figure 7 is a schematic structural diagram of the connecting ring of the present invention;

[0027] Figure 8 is a schematic structural diagram of the separated state of the lower implant and the upper implant pushed by the fixing screw of the present invention;

[0028] Figure 9 This is a partial structural schematic diagram of the separation state between the implant and the upper implant under the push of the fixing screw of the present invention;

[0029] Figure 10 This is a structural schematic diagram of the state where the dental implant, abutment, and fixing screw are implanted into the implant hole in the jawbone of the present invention;

[0030] Figure 11 This is a structural schematic diagram of the separation state of the main body of the dental implant, abutment, and fixing screw implanted into the implant hole in the jawbone and the internal upper implant and lower implant of the present invention.

[0031] In the figure: 1. Main body of dental implant; 2. Abutment; 3. Fixing screw; 11. Upper implant; 111. Internal thread groove; 112. Insertion slot; 113. Top thread; 12. Lower implant; 121. Crown end thread; 122. Limit hole; 13. Oblique guide groove; 14. Connecting insert block; 15. Movable slot; 151. Pressing slot; 16. Connecting ring; 161. Limit ring; 17. Protrusion; 18. Limit slot; 19. Spiral groove; 21. Insertion ring; 31. Top pin; 32. Pressing spring. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1 - Figure 11 , a dental implant based on a bidirectional thread structure, including a main body of the dental implant 1, an abutment 2, and a fixing screw 3. The main body of the dental implant 1 includes an upper implant 11 and a lower implant 12. At least one oblique guide groove 13 is opened at the top of the lower implant 12, and at least one connecting insert block 14 is provided at the bottom of the upper implant 11. The connecting insert block 14 is inserted into the oblique guide groove 13 to construct a connection chain between the upper implant 11 and the lower implant 12. During the separation process of the upper implant 11 and the lower implant 12, the lower implant 12 is misaligned and offset in the reverse direction of the inclination of the connecting insert block 14 and the oblique guide groove 13;

[0034] It should be noted that during the implantation process, first, imaging evaluation is performed: CBCT scanning, measuring the height and width of the jawbone, determining the available bone mass, avoiding dangerous areas, marking anatomical structures such as the inferior alveolar nerve canal and the maxillary sinus floor, and determining the implantation angle and depth;

[0035] Implantation process:

[0036] Step 1: Local anesthesia. Wipe the oral mucosa with iodophor and drape a sterile hole towel.

[0037] Step 2: Make a horizontal incision at the alveolar ridge crest, add a vertical releasing incision, and dissect the mucoperiosteal flap to expose the bone surface.

[0038] Step 3: Prepare holes step by step. The drilling depth should be 1 - 2 mm longer than the length of the implant.

[0039] When the drilling of the jawbone is completed, screw the main body 1 of the dental implant into the implant hole so that the top of the upper implant 11 is flush with the bone surface.

[0040] An internal thread groove 111 is provided inside the upper implant 11. The fixing screw 3 is threadedly connected inside the internal thread groove 111. A top pin 31 is movably connected to the bottom of the fixing screw 3, and a top pressure spring 32 is provided between the top pin 31 and the fixing screw 3.

[0041] It should be noted that the abutment 2 and the upper implant 11 are fixedly connected by the fixing screw 3. When the fixing screw 3 is screwed in, the top pin 31 of the fixing screw 3 presses the lower implant 12, so that the upper implant 11 and the lower implant 12 are separated and misaligned through the connecting insert block 14 and the inclined guide groove 13.

[0042] In an optional embodiment, a top thread 113 is provided on the outside of the upper implant 11, a crown thread 121 is provided on the outside of the lower implant 12. The lower implant 12 is set in a frustum shape, and the taper angle of the lower implant 12 is 8°. When the upper implant 11 and the lower implant 12 form a complete main body 1 of the dental implant, the top thread 113 and the crown thread 121 are set as a smooth and continuous thread structure. The top thread 113 is set as a wide-body flat and short thread, the crown thread 121 is set as a narrow-body sharp-edge and high thread, and the width of the top thread 113 and the crown thread 121 has a smooth transition.

[0043] Reference Figure 10 and Figure 11 It should be noted that during the process of screwing in the main body 1 of the dental implant, the top thread 113 at the top of the upper implant 11 is stably combined with the implant hole, the crown thread 121 of the lower implant 12 fits the bottom of the thread of the implant hole, and because the crown thread 121 is set in a sharp-edge shape, there is a certain gap between the crown thread 121 and the thread of the implant hole.

[0044] And the whole main body 1 of the dental implant is in a frustum shape. By setting the taper, the main body 1 of the dental implant has a taper friction with the implant hole, thereby improving the mechanical stability of the main body 1 of the dental implant. At the same time, due to the flat setting of the top thread 113, the micro-movement and bacterial invasion of the main body 1 of the dental implant are effectively reduced.

[0045] Reference Figure 11, Further, when the upper implant 11 and the lower implant 12 are separated and misaligned, and the top thread 113 and the crown thread 121 are misaligned, the crown thread 121 fits against the top of the implant hole thread, so that the crown thread 121 and the top thread 113 are misaligned and self-locked, achieving the effect of automatically locking the dental implant body 1. By misaligning the top thread 113 and the crown thread 121 into two misaligned threads with opposite spiral directions, the mechanical stability of the connection is ensured by the top thread 113 of the upper implant 11. Through the self-locking of the crown thread 121 of the lower implant 12 with the top thread 113, the overall dental implant body 1 is kept stable, thereby preventing the dental implant body 1 from becoming dislocated and loose from the implant hole, and further ensuring the implantation effect of the dental implant.

[0046] In an alternative embodiment, at least one spiral groove 19 is provided on the outer surfaces of both the upper implant 11 and the lower implant 12.

[0047] It should be noted that the spiral groove 19 is used for discharging bone fragments during the implantation process.

[0048] In an alternative embodiment, a socket groove 112 is provided at the top of the upper implant 11, and a socket ring 21 is fixedly connected to the bottom of the abutment 2. The socket ring 21 and the socket groove 112 are radially limited and inserted, and the fixing screw 3 passes through the abutment 2 and the socket ring 21 and is threadedly connected to the internal thread groove 111.

[0049] It should be noted that during the installation of the dental crown, the abutment 2 is inserted into the socket groove 112 of the upper implant 11 through the socket ring 21, and then the abutment 2 and the upper implant 11 are fixed by the fixing screw 3. The dental crown is installed on the top of the abutment 2 to complete the implantation of the denture.

[0050] Reference Figures 4 - 6 , In an alternative embodiment, a movable groove 15 and a pressing groove 151 are provided at the inner bottom of the lower implant 12. A connecting ring 16 is movably connected inside the movable groove 15. The movable groove 15 is provided with a straight groove opening, and the groove opening direction is adapted to the direction of the inclined guiding groove 13. The outer wall of the connecting ring 16 fits against the inner wall of the bottom of the upper implant 11. The fixing screw 3 passes through the connecting ring 16, and the bottom of the top pin 31 presses inside the pressing groove 151.

[0051] It should be noted that when installing the fixing screw 3, the fixing screw 3 is pressed against the top of the top pressure groove 151 through the top pin 31. Since the upper part of the fixing screw 3 is threadedly connected to the upper implant 11, the bottom of the fixing screw 3 pushes the lower implant 12 downward through the top pin 31. When the lower implant 12 moves downward, the lower implant 12 undergoes a lateral displacement under the action of the inclined guide groove 13 and the connecting insert block 14, so that the upper implant 11 and the lower implant 12 are vertically separated and laterally misaligned, and further the top thread 113 and the crown thread 121 are misaligned, forming two misaligned threads inside the implant hole, so as to achieve the purpose of locking the dental implant body 1.

[0052] It should be noted that the connecting ring 16 is used to maintain the connection stability between the upper implant 11 and the lower implant 12. The axis of the connecting ring 16 is collinear with that of the upper implant 11. When the lower implant 12 is laterally displaced, the lower implant 12 and the connecting ring 16 are misaligned, and the connecting ring 16 is laterally displaced inside the movable groove 15.

[0053] The connecting ring 16 is used to isolate the internal thread groove 111 of the upper implant 11 from the implant hole, ensure the sealing performance of the internal thread groove 111 during the tooth implantation process, avoid foreign object interference inside the internal thread groove 111, and at the same time the connecting ring 16 further ensures the stability of the feeding process of the fixing screw 3, so as to ensure the stability and safety during the tooth implantation process.

[0054] Reference Figure 4 and Figure 7 In an alternative embodiment, a limiting ring 161 is fixedly connected to the outside of the connecting ring 16, and a limiting groove 18 is formed on the inner wall of the movable groove 15, and the limiting ring 161 is clamped inside the limiting groove 18.

[0055] Among them, the connecting ring 16 is arranged as two split ring bodies, the two split ring bodies are glued together, limiting rings 161 are arranged on the outside of both split ring bodies, and installation notches are formed in the limiting rings 161 of both split ring bodies.

[0056] It should be noted that during the assembly process, both split ring bodies are clamped into the position of the limiting groove 18 through the installation notches, then the ring bodies are twisted, and then glued together to construct the complete connecting ring 16. At this time, the installation notches of the two groups of limiting rings 161 of the connecting ring 16 are misaligned, so that the connecting ring 16 is stably installed inside the movable groove 15 through the upper and lower two groups of limiting rings 161, and the connecting ring 16 and the lower implant 12 maintain axial stability.

[0057] Among them, a convex block 17 is fixedly connected to the outside of the connecting ring 16, a limiting hole 122 is formed on the outside of the lower implant 12, and the convex block 17 is inserted outside the limiting hole 122. When the upper implant 11 and the lower implant 12 are misaligned and displaced, the convex block 17 extends through the outside of the limiting hole 122.

[0058] Reference Figure 9 and Figure 11 It should be noted that when the connecting ring 16 and the movable groove 15 are laterally offset, the connecting ring 16 pushes the convex block 17 through the limiting hole 122, so that the convex block 17 protrudes to the outside of the lower implant 12 to form a limiting stop block. The stable connection between the lower implant 12 and the implant hole is further ensured by the combined use of the convex block 17 and the crown end thread 121, thereby ensuring the implantation stability of the dental implant body 1.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dental implant based on a bidirectional thread structure, comprising a dental implant body (1), an abutment (2) and a fixing screw (3), characterized in that: The dental implant body (1) comprises an upper implant (11) and a lower implant (12); at least one oblique guide groove (13) is provided on the top of the lower implant (12); at least one connecting plug (14) is provided on the bottom of the upper implant (11); the connecting plug (14) is plugged into the oblique guide groove (13) to form a connecting chain between the upper implant (11) and the lower implant (12); during the separation process of the upper implant (11) and the lower implant (12), the lower implant (12) is displaced in the opposite direction along the inclination of the connecting plug (14) and the oblique guide groove (13); An internal thread groove (111) is provided inside the upper implant (11), the fixing screw (3) is threadedly connected to the inside of the internal thread groove (111), a top pin (31) is movably connected to the bottom of the fixing screw (3), and a top pressure spring (32) is provided between the top pin (31) and the fixing screw (3).

2. A dental implant based on a bidirectional thread structure according to claim 1, characterized in that: The upper implant (11) is provided with an apical thread (113) on the outside, and the lower implant (12) is provided with a coronal thread (121) on the outside. The lower implant (12) is configured to be a frustum, and the cone angle of the lower implant (12) is 8°. When the upper implant (11) and the lower implant (12) construct a complete dental implant body (1), the apical thread (113) and the coronal thread (121) are configured to be a smooth and continuous thread structure. The apical thread (113) is configured to be a wide flat short thread, and the coronal thread (121) is configured to be a narrow sharp high thread. The apical thread (113) and the coronal thread (121) have a smooth transition in width.

3. A dental implant based on a bidirectional thread structure according to claim 1, characterized in that: At least one spiral groove (19) is formed on the outside of the upper implant (11) and the lower implant (12).

4. The dental implant based on a bidirectional thread structure according to claim 1, characterized in that: The top of the upper implant (11) is provided with a plug-in groove (112), the bottom of the base (2) is fixedly connected with a plug-in ring (21), the plug-in ring (21) and the plug-in groove (112) are radially limited and plug-in, and the fixing screw (3) passes through the base (2) and the plug-in ring (21) and is threadedly connected to the internal thread groove (111).

5. The dental implant based on a bidirectional thread structure according to claim 1, characterized in that: The inner bottom of the lower implant (12) is provided with a movable groove (15) and a top pressure groove (151); the movable groove (15) is movably connected to a connecting ring (16); the movable groove (15) is arranged as a straight groove, the direction of the groove is adapted to the direction of the oblique guide groove (13); the outer wall of the connecting ring (16) is fitted with the inner wall of the bottom of the upper implant (11); the fixing screw (3) passes through the connecting ring (16), and the bottom of the top pin (31) is pressed against the inside of the top pressure groove (151).

6. A dental implant based on a bidirectional thread structure according to claim 5, characterized in that: The outside of the connecting ring (16) is fixedly connected to a limiting ring (161), the inner wall of the movable groove (15) is provided with a limiting groove (18), and the limiting ring (161) is clamped inside the limiting groove (18).

7. A dental implant based on a bidirectional thread structure according to claim 6, characterized in that: The connecting ring (16) is configured as two ring sections, the two ring sections are bonded together by glue, and the outsides of the two ring sections are both provided with limiting rings (161), and the limiting rings (161) of the two ring sections are both provided with installation notches.

8. The dental implant based on a bidirectional thread structure according to claim 6, characterized in that: The outside of the connecting ring (16) is fixedly connected with a protrusion (17), the outside of the lower implant (12) is provided with a limiting hole (122), the protrusion (17) is inserted into the outside of the limiting hole (122), and when the upper implant (11) and the lower implant (12) are misaligned, the protrusion (17) extends through to the outside of the limiting hole (122).

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