Dental implant
By designing a dental implant with progressive internal thread structure and Mohss taper self-locking joint effect, the problem of insufficient initial stability of the implant is solved, early bone binding and long-term stability is achieved, the cost of implantation and repair is reduced, and the applicable population is expanded.
Patent Information
- Application Number
- CN202420596919.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The initial stability control of existing implants is difficult to balance during implantation, resulting in failure of osseous conjugation or fracture, increasing the financial burden of patients, and the scope of indications is limited.
A dental implant is designed, with a progressive internal thread structure inside, including the first and third conical studs and the second column studs, combining the 15° angle and the Mohss taper self-locking effect, optimizing the thread depth and density, reducing pressure concentration, enhancing initial stability and long-term bone binding.
Improve the early stability and long-term stability of implant implants, reduce bone resorption, expand indications, reduce costs, and achieve aesthetic repair effects.
Smart Images
Figure CN223111818U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an implant for dental use, belonging to the technical field of medical devices. Background Art
[0002] An implant-supported denture is a kind of tooth replacement prosthesis completed on the basis of implant support and retention. It has now become the preferred restoration method for tooth defect and tooth loss. Among the current clinical applications and market circulations, the threaded implant has advantages. Safe primary stability is positively correlated with successful long-term implant integration, which can ensure successful clinical results. The initial stability of an implant is defined as the biomechanical stability after implantation, and it is affected by bone quantity and quality, implant geometry, surgical technique, and insertion torque.
[0003] Most of the existing implants are imported. A considerable part of the cost of implant restoration comes from the high cost of imported implant materials, resulting in high implant restoration costs, greatly increasing the economic burden on patients, restricting the further clinical promotion of implant denture technology, and making it difficult to benefit a large number of toothless patients.
[0004] A major technical problem faced by dental implants is the control of initial stability during implant insertion. On the one hand, insufficient initial stability and continuous micro-movement cause bone bonding failure, ultimately leading to early implant shedding. On the other hand, too high initial stability (too large implant insertion torque) will cause bone burns and bone fractures, and then lead to implant failure. In the elderly with osteoporosis, diabetes, periodontal disease, and smoking populations, the reduction of implant bone bonding rate caused by various systemic diseases has also become the main risk of current artificial dental implant failure. Therefore, how to improve the control of initial stability during implant insertion, improve the implant bone bonding rate, and expand the indications of dental implants is still an urgent problem to be solved in artificial dental implant treatment. For this reason, the present utility model is proposed. Summary of the Invention
[0005] Aiming at the deficiencies of the prior art, the present utility model provides an implant for dental use, which improves the early stability of implant insertion, makes implanting easier, the results more predictable, maintains the long-term stability of bone tissue and soft tissue, and achieves aesthetic restoration effects.
[0006] The technical solution of the present utility model is as follows:
[0007] An implant for dental use includes a body. An internal thread is provided inside the body. The body is successively composed of a first stud, a second stud, and a third stud from top to bottom. Among them, both the first stud and the third stud are conical, providing a progressive bone extrusion effect, and the second stud is cylindrical, and the threads on the second stud are parallel to each other;
[0008] When the implant is implanted, the diameter of the implant cavity is consistent with the diameter of the second stud. During implantation, the threads on the second stud are parallel, without self-tapping property, and will not generate excessive pressure due to self-tapping, thereby reducing the over-activity of osteoclasts caused by pressure and promoting the early bone bonding of the body implant.
[0009] Preferably according to the present utility model, a tapered platform is provided between the threads at the top of the second stud and the threads at the bottom of the first stud. The side of the vertical cross-section of the tapered platform forms an angle of 15° with the horizontal line. The 15° angle, in combination with the parallel thread design, ensures that the implant has a larger bone bonding area, changes the stress distribution of the cancellous bone when the implant is functionally loaded, and moreover, more remaining bone mass can be retained during the implantation at the 15° angle, which is beneficial to improving the long-term repair effect of the implant.
[0010] Preferably according to the present utility model, the pitch of the threads on the first stud is smaller than the pitch of the threads on the third stud, and the pitch of the threads on the third stud is smaller than the pitch of the threads on the second stud;
[0011] The depth of the threads on the first stud is smaller than the depth of the threads on the third stud, and the depth of the threads on the third stud is smaller than the depth of the threads on the second stud. The thread density on the first stud is the highest and the depth is the shallowest, which increases the contact area between the implant and the cortical bone, improves the initial stability during implantation, and moreover, generates a load on the surrounding cortical bone during implantation through the shallow and dense thread structure, which helps to reduce the pressure on the bone; reduces the problem of cortical bone resorption caused by excessive pressure, and at the same time can more evenly disperse the pressure generated during occlusion after restoration, reducing the problem of bone resorption that may be caused by stress concentration.
[0012] Preferably according to the present utility model, the maximum outer diameter of the first stud is 0.6 mm larger than the outer diameter of the second stud, ensuring a prepared step difference at the part where the top of the implant contacts the cortical bone, thereby ensuring the initial stability during implant implantation. The outer diameter of the second stud is the same as the maximum outer diameter of the third stud.
[0013] Preferably according to the present utility model, the maximum outer diameter of the first stud is 3 mm - 7 mm, and the overall length of the implant (i.e., the sum of the lengths of the first stud, the second stud, and the third stud) is 6 mm - 20 mm.
[0014] Preferably according to the present utility model, the internal thread inside the body extends from the first stud to the second stud. A cylindrical groove is provided inside the first stud above the internal thread. The diameter of the cylindrical groove is greater than the diameter of the internal thread. The internal thread matches the external thread of the fixing screw at the bottom of the abutment. The cooperation between the internal thread and the cylindrical groove has two effects. First, during use, the thread at the bottom of the abutment is screwed into the implant, and the round table in the middle of the abutment is tightly combined with the cylindrical groove to achieve the self-locking effect of the Morse taper. Through the combination of thread and static friction for fixation, at the same time, the tight combination of the round table structure in the middle of the abutment and the cylindrical groove can prevent the occurrence of micro-leakage. Second, it can prevent stress concentration when the abutment is stressed, causing the fracture of the fixing screw and the fracture of the implant on the side wall of the implant body. Moreover, the connection with the Morse taper makes the implant and the abutment have strong mechanical stability, reduces the micro-movement of the abutment, reduces the marginal bone resorption around the implant, and realizes the long-term stability of implant restoration.
[0015] Preferably according to the present utility model, the external thread of the third stud is a self-tapping thread, ensuring that the implant can be implanted deeper with the torque.
[0016] Further preferably according to the present utility model, the bottom of the third stud is a plane, making the cutting edge sharper and enhancing the self-tapping property of the self-tapping thread at the root.
[0017] The beneficial effects of the present utility model are as follows:
[0018] 1. The present utility model improves the early stability of implant implantation, makes implantation easier, the results more predictable, maintains the long-term stability of bone tissue and soft tissue, and realizes the aesthetic restoration effect.
[0019] 2. The threads on the second stud of the present utility model are parallel. When the implant is implanted, the diameter of the implant cavity is the same as the diameter of the second stud. During implantation, the threads on the second stud are parallel, without self-tapping property, and will not generate excessive pressure due to self-tapping, thereby reducing the over-activity of osteoclasts caused by pressure and promoting the early bone union of the implant body.
[0020] 3. The cooperation between the internal thread and the cylindrical groove of the present utility model has two effects. First, during use, the thread at the bottom of the abutment is screwed into the implant, and the round table structure in the middle of the abutment is tightly combined with the cylindrical groove to achieve the self-locking effect of the Morse taper. Through the combination of thread and static friction for fixation, at the same time, the tight combination of the round table structure in the middle of the abutment and the cylindrical groove can prevent the occurrence of micro-leakage. Second, it can prevent stress concentration when the abutment is stressed, causing the fracture of the fixing screw and the fracture of the implant on the side wall of the implant body. Moreover, the connection with the Morse taper makes the implant and the abutment have strong mechanical stability, reduces the micro-movement of the abutment, reduces the marginal bone resorption around the implant, and realizes the long-term stability of implant restoration.
[0021] 4. The first stud of the present utility model is conical, and the corresponding planting position of the first stud is the crown end. Since the blood supply of the cortical bone at the crown end is less and it is more sensitive to pressure, excessive pressure will cause bone resorption. The conical design can shift the stress concentration area downward, avoid bone resorption caused by stress concentration, facilitate bone attachment and bone growth, and achieve the long-term stability of the implant. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a schematic structural view of the present utility model;
[0023] Figure 2 is a schematic internal structural view of the present utility model;
[0024] Wherein: 1. First stud; 2. Second stud; 3. Third stud; 4. Abutment; 5. Conical platform; 6. Cylindrical groove; 7. Internal thread;
[0025] 41. Fixing screw; 42. Round platform. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The present utility model will be further described below by way of examples in conjunction with the drawings, but not limited thereto.
[0027] Example 1:
[0028] As Figure 1-2 shown, this embodiment provides a dental implant, including a body. An internal thread 7 is provided inside the body. The body successively includes a first stud 1, a second stud 2, and a third stud 3 from top to bottom. Among them, both the first stud 1 and the third stud 3 are conical to provide a progressive bone extrusion effect, and the second stud 2 is cylindrical, and the threads on the second stud 2 are parallel;
[0029] When the implant is implanted, the diameter of the implant socket is the same as the diameter of the second stud. During implantation, the threads on the second stud are parallel, without self-tapping property, and will not generate excessive pressure due to self-tapping, thereby reducing the excessive activity of osteoclasts caused by pressure and promoting the early bone bonding of the body part of the implant.
[0030] A conical platform 5 is provided between the threads at the top of the second stud 2 and the threads at the bottom of the first stud 1. The side of the vertical section of the conical platform 5 forms an angle of 15° with the horizontal line. The 15° angle cooperates with the parallel thread design to ensure that the implant has a larger bone bonding area, change the stress distribution of the cancellous bone when the implant is functionally loaded, and moreover, more remaining bone mass can be retained during the implantation at the 15° angle, which is beneficial to improving the long-term repair effect of the implant.
[0031] The thread pitch of the threads on the first stud 1 is smaller than the thread pitch of the threads on the third stud 3, and the thread pitch of the threads on the third stud 3 is smaller than the thread pitch of the threads on the second stud 2;
[0032] The thread depth on the first stud 1 is less than that on the third stud 3, and the thread depth on the third stud 3 is less than that on the second stud 2. The thread density on the first stud is the highest and the depth is the shallowest, which increases the contact area between the implant and the cortical bone, improves the initial stability during implantation, and generates a load on the surrounding cortical bone during implantation through the shallow and dense thread structure, helping to reduce the pressure on the bone; reducing the problem of cortical bone resorption caused by excessive pressure, and at the same time, it can also more evenly disperse the pressure generated during occlusion after restoration, reducing the bone resorption problem that may be caused by stress concentration.
[0033] The maximum outer diameter of the first stud 1 is 0.6 mm larger than the outer diameter of the second stud 2, ensuring a significant difference in the part where the top of the implant contacts the cortical bone, thus ensuring the initial stability during implant implantation. The outer diameter of the second stud 2 is the same as the maximum outer diameter of the third stud 3.
[0034] The maximum outer diameter of the first stud 1 is 3 mm - 7 mm, and the overall length of the implant (i.e., the sum of the lengths of the first stud, the second stud, and the third stud) is 6 mm - 20 mm.
[0035] The internal thread 7 inside the body extends from the first stud 1 to the second stud 2. A cylindrical groove 6 is provided inside the first stud above the internal thread 7. The diameter of the cylindrical groove 6 is larger than the diameter of the internal thread 7. The internal thread 7 matches the external thread of the fixing screw 41 at the bottom of the abutment 4. The cooperation between the internal thread and the cylindrical groove has two effects. First, during use, the thread at the bottom of the abutment is screwed into the implant, and the round table 42 in the middle of the abutment is tightly combined with the cylindrical groove 6 to achieve the self-locking effect of the Morse taper. Through the combination of thread and static friction for fixation, at the same time, the tight combination of the round table structure in the middle of the abutment and the cylindrical groove can prevent the occurrence of micro-leakage; second, it can prevent stress concentration when the abutment is stressed, causing the fracture of the fixing screw and the fracture of the implant on the side wall of the implant. Moreover, the connection of the Morse taper makes the implant and the abutment have strong mechanical stability, reduces the micro-movement of the abutment, reduces the marginal bone resorption around the implant, and realizes the long-term stability of implant restoration.
[0036] The external thread of the third stud is a self-tapping thread, ensuring that the implant can be implanted deeper with torque.
[0037] The bottom of the third stud is a plane, making the cutting edge sharper and enhancing the self-tapping property of the self-tapping thread at the root.
[0038] The use of the implant is the same as that of the existing implant. The implant and the abutment are sequentially placed.
[0039] Above, although the preferred embodiments of the present invention have been described, the scope of the present invention is not limited to this specific embodiment. If a person with general knowledge in the art can make appropriate changes within the scope recorded in the claims of the present invention.
Claims
1. A dental implant, characterized in that, It includes a body with internal threads. The body consists of a first stud, a second stud, and a third stud from top to bottom. Among them, both the first stud and the third stud are conical, the second stud is cylindrical, and the threads on the second stud are parallel.
2. The dental implant according to claim 1, characterized in that, There is a conical platform between the threads at the top of the second stud and the threads at the bottom of the first stud. The side of the vertical cross-section of the conical platform forms a 15° angle with the horizontal line.
3. The dental implant according to claim 2, characterized in that, The pitch of the threads on the first stud is smaller than the pitch of the threads on the third stud, and the pitch of the threads on the third stud is smaller than the pitch of the threads on the second stud. The depth of the threads on the first stud is smaller than the depth of the threads on the third stud, and the depth of the threads on the third stud is smaller than the depth of the threads on the second stud.
4. The dental implant according to claim 3, characterized in that, The maximum outer diameter of the first stud is 0.6 mm larger than the outer diameter of the second stud, and the outer diameter of the second stud is the same as the maximum outer diameter of the third stud.
5. The dental implant according to claim 4, characterized in that, The maximum outer diameter of the first stud is 3 mm - 7 mm, and the overall length of the implant is 6 mm - 20 mm.
6. The dental implant according to claim 4, characterized in that, The internal threads inside the body extend from the first stud to the second stud. There is a cylindrical groove inside the first stud above the internal threads. The diameter of the cylindrical groove is larger than the diameter of the internal threads. The internal threads match the external threads of the fixing screw at the bottom of the abutment.
7. The dental implant according to claim 6, characterized in that, The external threads of the third stud are self-tapping threads.
8. The dental implant according to claim 7, characterized in that, The bottom of the third stud is flat.