A dental implant based on a bidirectional thread structure

Abstract

The present invention belongs to the technical field of dental implants, and specifically relates to a dental implant based on a bidirectional thread structure, comprising a dental implant body, a base and a fixing screw, wherein the dental implant body comprises an upper implant and a lower implant, the top of the lower implant is provided with at least one oblique guide groove, the bottom of the upper implant is provided with at least one connecting plug, and the connecting plug is plugged into the oblique guide groove to form a connecting chain of the upper implant and the lower implant; by misaligning the top thread and the coronal thread, the coronal thread fits the top of the implant hole thread, so that the coronal thread and the top thread are misaligned and self-locked, thereby achieving the purpose of automatically locking the dental implant body, utilizing the top thread of the upper implant to ensure the mechanical stability of the connection, and by misaligning and self-locking the coronal thread and the top thread of the lower implant, the overall dental implant body remains stable, thereby preventing the dental implant body and the implant hole from being dislocated and loosened, thereby ensuring the implantation effect of the dental implant.

Description

Technical Field

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

[0002] Implants are the base and key component of medical dentures, securing them in place. They are typically placed into the jawbone. Implants are typically made of titanium alloy and connected to the crown via an abutment. During implant placement, the stability of the implant affects the stability of the crown, thus impacting the quality and effectiveness of the implant.

[0003] A search revealed Chinese patent application number CN102860878A, which discloses an improved medical implant. The invention comprises a body portion implanted in human tissue, a base post for securing an artificial tooth, and a neck portion connecting the body and the base post. The body portion is threaded, with a first thread having a larger pitch at the lower end and a second thread having a smaller pitch at the upper end. By employing different pitches for the first and second threads, implantation is made more convenient and stable.

[0004] However, the above-mentioned implants use threads with different pitches. Since the thread pitches of the top and crown are different, the feed amplitudes of the top and crown of the implant are different when the implant is screwed in, which can easily cause damage to the jawbone and lead to a fragile connection between the implant and the implant hole in the jawbone. This can easily cause the implant to loosen during the crown occlusion process, thereby affecting the stability of the implant. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a dental implant based on a bidirectional thread structure, which keeps the overall dental implant body stable, thereby preventing the dental implant body and the implant hole from dislocating and loosening, thereby 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. The top of the lower implant is provided with at least one oblique guide groove. The bottom of the upper implant is provided with at least one connecting plug. The connecting plug is plugged into the oblique guide groove to form a connecting 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 displaced and offset along the inclination of the connecting plug and the oblique guide groove.

[0008] An internal thread groove is provided inside the upper implant, the fixing screw is threadedly connected to the inside of the internal thread groove, a top pin is movably connected to the bottom of the fixing screw, and a pressure spring is provided between the top pin and the fixing screw.

[0009] Preferably, the outside of the upper implant is provided with a top thread, the outside of the lower implant is provided with a coronal thread, the lower implant is set to a frustum shape, and the cone angle of the lower implant is 8°. When the upper implant and the lower implant construct a complete dental implant body, the top thread and the coronal thread are set to a smooth and continuous thread structure, the top thread is set to a wide body flat low thread, and the coronal thread is set to a narrow body sharp edge high thread, and the top thread and the coronal thread have a smooth transition in width.

[0010] Preferably, at least one spiral groove is formed on the outside of the upper implant and the lower implant.

[0011] Preferably, a plug-in groove is provided on the top of the upper implant, a plug-in ring is fixedly connected to the bottom of the base, the plug-in ring and the plug-in groove are radially limited and plugged, and the fixing screw passes through the base and the plug-in 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, and a connecting ring is movably connected inside the movable groove. The movable groove is set as a straight slot, and the slot direction is adapted to the direction of the oblique guide groove. The outer wall of the connecting ring fits with 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 is pressed against the inside of the top pressure groove.

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

[0014] Preferably, the connecting ring is configured as two ring sections, the two ring sections are bonded together by glue, and limiting rings are provided on the outside of the two ring sections, and the limiting rings of the two ring sections are provided with installation notches.

[0015] Preferably, a protrusion is fixedly connected to the outside of the connecting ring, a limiting hole is opened on the outside of the lower implant, and the protrusion is inserted into the outside of the limiting hole. When the upper implant and the lower implant are misaligned, the protrusion extends through the outside of the limiting hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The top thread and the crown thread of the present invention are misaligned, and the crown thread fits the top of the implant hole thread, so that the crown thread and the top thread are misaligned and self-locked, thereby achieving the purpose of automatically locking the dental implant body. The top thread and the crown thread are misaligned to form two misaligned threads that are misaligned in the spiral direction. The top thread of the upper implant is used to ensure the mechanical stability of the connection. The crown thread and the top thread of the lower implant are misaligned and self-locked, so that the overall dental implant body remains stable, thereby preventing the dental implant body and the implant hole from dislocating and loosening, thereby ensuring the implantation effect of the dental implant.

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

[0019] 3. When the connecting ring and the movable groove of the present invention are laterally offset, the connecting ring pushes the protrusion to pass through the limiting hole, so that the protrusion protrudes to the outside of the lower implant, forming a limiting block. The coordinated use of the protrusion and the crown end thread further ensures the stable connection between the lower implant and the implant hole, thereby ensuring the implant stability of the dental implant body. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 This 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 This is a schematic diagram of the exploded structure of the dental implant body, abutment, and fixing screw of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the dental implant body and the abutment separated from each other according to the present invention;

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

[0025] Figure 6 Schematic diagram of the structure of the connection surface between the upper implant and the lower implant of the present invention;

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

[0027] Figure 8 This is a schematic structural diagram of the present invention in a state where the fixing screw pushes the lower implant to separate from the upper implant;

[0028] Figure 9 This is a partial structural diagram of the present invention in a state where the fixing screw pushes the lower implant to separate from the upper implant;

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

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

[0031] In the figure: 1. dental implant body; 2. abutment; 3. fixing screw; 11. upper implant; 111. internal thread groove; 112. plug-in groove; 113. top thread; 12. lower implant; 121. crown thread; 122. limiting hole; 13. oblique guide groove; 14. connecting plug; 15. movable groove; 151. top pressure groove; 16. connecting ring; 161. limiting ring; 17. protrusion; 18. limiting groove; 19. spiral groove; 21. plug-in ring; 31. ejector pin; 32. top pressure spring. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] See also Figure 1 - Figure 11 A dental implant based on a bidirectional thread structure includes a dental implant body 1, an abutment 2 and a fixing screw 3. The dental implant body 1 includes an upper implant 11 and a lower implant 12. The top of the lower implant 12 is provided with at least one oblique guide groove 13. The bottom of the upper implant 11 is provided with at least one connecting plug 14. 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.

[0034] It should be noted that during the implantation process, an imaging assessment is first performed: CBCT scan, measuring the height and width of the jaw, determining the available bone volume, 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: Apply local anesthesia, wipe the oral mucosa with iodine, and lay a sterile drape;

[0037] Step 2: Make a horizontal incision on the alveolar crest, add a vertical relaxing incision, peel off the mucoperiosteal flap, and expose the bone surface;

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

[0039] When the drilling of the jaw bone is completed, the dental implant body 1 is screwed 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 , and 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 pressure spring 32 is provided between the top pin 31 and the fixing screw 3 .

[0041] It should be noted that the base 2 and the upper implant 11 are fixedly connected by the fixing screw 3. When the fixing screw 3 is screwed in, the push 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 dislocated through the connecting plug 14 and the oblique guide groove 13.

[0042] In an optional embodiment, the outside of the upper implant 11 is provided with a top thread 113, and the outside of the lower implant 12 is provided with a coronal thread 121. The lower implant 12 is set to a cone shape, 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 top thread 113 and the coronal thread 121 are set to a smooth and continuous thread structure, the top thread 113 is set to a wide body flat low thread, and the coronal thread 121 is set to a narrow body sharp edge high thread, and the top thread 113 and the coronal thread 121 have a smooth transition in width.

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

[0044] The overall dental implant body 1 is in the shape of a cone. By setting the taper, the dental implant body 1 and the implant hole produce taper friction, thereby improving the mechanical stability of the dental implant body 1. At the same time, due to the flat setting of the top thread 113, the micro-movement of the dental implant body 1 and the invasion of bacteria are effectively reduced.

[0045] refer to Figure 11Furthermore, when the upper implant 11 and the lower implant 12 are separated and misaligned, when the top thread 113 and the coronal thread 121 are misaligned, the coronal thread 121 fits against the top of the implant hole thread, so that the coronal thread 121 and the top thread 113 are misaligned and self-locked, thereby achieving the effect of automatically locking the dental implant body 1. The top thread 113 and the coronal thread 121 are misaligned and divided into two misaligned threads misaligned in the spiral direction. The top thread 113 of the upper implant 11 is used to ensure the mechanical stability of the connection. The coronal thread 121 and the top thread 113 of the lower implant 12 are misaligned and self-locked, so that the overall dental implant body 1 remains stable, thereby preventing the dental implant body 1 from being dislocated and loosened from the implant hole, thereby ensuring the implantation effect of the dental implant.

[0046] In an optional embodiment, at least one spiral groove 19 is formed on the exterior of the upper implant 11 and the lower implant 12 .

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

[0048] In an optional embodiment, a plug-in groove 112 is provided at the top of the upper implant 11, and a plug-in ring 21 is fixedly connected to the bottom of the base 2. The plug-in ring 21 and the plug-in groove 112 are radially limited and plugged 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.

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

[0050] refer to Figure 4-Figure 6 In an optional embodiment, a movable groove 15 and a top pressure 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 set as a straight slot, and the slot direction is adapted to the direction of the oblique guide groove 13. The outer wall of the connecting ring 16 fits 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 presses against the inside of the top pressure 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, and 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 to deviate downward through the top pin 31. When the lower implant 12 deviates downward, the lower implant 12 is laterally offset through the action of the oblique guide groove 13 and the connecting plug block 14, thereby causing the upper implant 11 and the lower implant 12 to be vertically separated and laterally dislocated, thereby causing the top thread 113 and the coronal thread 121 to be dislocated, forming two dislocated threads inside the implant hole, thereby achieving 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 axes of the connecting ring 16 and the upper implant 11 are collinear. When the lower implant 12 is laterally offset, the lower implant 12 and the connecting ring 16 are misaligned, and the connecting ring 16 is laterally offset inside the movable groove 15.

[0053] The connecting ring 16 is used to isolate the internal thread groove 111 of the upper implant 11 and the implant hole, ensuring the sealing of the internal thread groove 111 during the implantation process and avoiding interference from foreign objects inside the internal thread groove 111. At the same time, the connecting ring 16 further ensures the stability of the feeding process of the fixing screw 3, thereby ensuring stability and safety during the implantation process.

[0054] refer to Figure 4 and Figure 7 In an optional embodiment, 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 snapped into the inside of the limiting groove 18 .

[0055] The connecting ring 16 is configured as two ring sections, which are bonded together by glue. A limiting ring 161 is provided on the outside of the two ring sections, and the limiting rings 161 of the two ring sections are provided with installation notches.

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

[0057] Among them, the outside of the connecting ring 16 is fixedly connected with a protrusion 17, and a limiting hole 122 is opened on the outside of the lower implant 12. The protrusion 17 is inserted into the outside of the limiting hole 122. When the upper implant 11 and the lower implant 12 are misaligned, the protrusion 17 extends through the outside of the limiting hole 122.

[0058] refer to 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 protrusion 17 to pass through the limiting hole 122, so that the protrusion 17 protrudes to the outside of the lower implant 12, forming a limiting block. The coordinated use of the protrusion 17 and the coronal end thread 121 further ensures the stability of the connection between the lower implant 12 and the implant hole, thereby ensuring the implant stability of the dental implant main body 1.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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 of 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 oblique direction 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. The dental implant based on a bidirectional thread structure according to claim 1, characterized in that: The outer portion of the upper implant (11) is provided with a top thread (113), and the outer portion of the lower implant (12) is provided with a coronal thread (121). The lower implant (12) is configured as a cone shape, 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 top thread (113) and the coronal thread (121) are configured as a smooth and continuous thread structure. The top thread (113) is configured as a wide-body flat low thread, and the coronal thread (121) is configured as a narrow-body sharp-edged high thread. The top thread (113) and the coronal thread (121) have a smooth transition between width and narrowness.

3. The dental implant based on a bidirectional thread structure according to claim 1, characterized in that: At least one spiral groove (19) is provided 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 plugged, 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 interior of the movable groove (15) is movably connected to a connecting ring (16); the movable groove (15) is set as a straight slot, the slot direction 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. The 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. The 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 exteriors 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 the outside of the limiting hole (122).

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