A dental implant and a dental implant restoration system

Abstract

The present application provides a kind of dental implant and dental implant restoration system, dental implant includes the neck, middle and root that are sequentially interconnected, the neck is columnar, with diameter D1;The middle is conical, with maximum diameter D2, the middle surface is equipped with middle outer thread;The root is columnar, with diameter D3, the root surface is equipped with root outer thread;And D1, D2, D3 The value size satisfies: D2 has greater than the maximum value of D1, D3, can improve the initial stability of implant.The present application is particularly suitable for the alveolar bone condition of insufficient bone mass or osteoporosis by the unique implant shape design and matching drill system, can significantly enhance the initial stability of implant, reduce the risk of implant loosening, thereby effectively improve the success rate of implant.

Description

Technical Field

[0001] This invention relates to the field of dental implant technology, specifically to a dental implant and a dental implant restoration system. Background Technology

[0002] In the field of dental implantology, alveolar bone quality and volume are among the key factors affecting the success rate of implant surgery. However, a large number of patients in clinical practice have insufficient bone volume or osteoporosis at the implantation site, which poses a significant challenge to implant surgery.

[0003] Currently widely used traditional implants mostly employ a uniform design (i.e., the implant diameter changes linearly from the root side to the coronal side). This design requires sufficient alveolar bone width from the root apex to the neck to completely cover the implant. If the alveolar bone width is insufficient, guided bone regeneration (GBR) or other bone augmentation surgeries are often required, significantly increasing surgical trauma, operation time, and the patient's financial burden. Therefore, there is an urgent need to develop a new type of implant that, while ensuring the mechanical strength of the implant, minimizes the requirement for alveolar bone lateral width to accommodate more complex clinical cases.

[0004] When alveolar bone density is poor, implants struggle to achieve ideal initial stability, significantly reducing implant success rates. Studies have shown that implant length and shape design are closely related to their initial stability. Therefore, it is necessary to enhance the initial stability of implants in low-bone-density areas by innovating their structural design to increase the effective implant length within a safe range.

[0005] In addition, in order to adapt to the uniform shape of traditional implants, the preparation of implantation holes usually requires multiple drills to gradually enlarge the hole along the entire length. This method has problems such as cumbersome operation steps, increased risk of bone burns, increased probability of positional displacement, and low efficiency in hole preparation, which adversely affect the final implantation results.

[0006] In conclusion, there is an urgent clinical need for an implant and related tools that can be used quickly and stably to implant patients with insufficient bone volume or osteoporosis, in order to improve the overall success rate of implantation, reduce patient suffering, lower treatment costs, and optimize the clinical experience. Summary of the Invention

[0007] Therefore, in response to at least one of the above-mentioned problems, the present invention provides a dental implant and a dental implant restoration system.

[0008] This invention is implemented using the following scheme:

[0009] This invention proposes a dental implant comprising a neck, a middle section, and a root section connected sequentially to each other. The neck is cylindrical with a diameter D1. The middle section is at least partially conical with a maximum diameter D2, and the surface of the middle section is provided with a central external thread. The root section is cylindrical with a diameter D3, and the surface of the root section is provided with a root external thread. The values ​​of D1, D2, and D3 satisfy the following condition: D2 has a maximum value greater than both D1 and D3.

[0010] In one embodiment, the values ​​of D1, D2, and D3 satisfy the following order: D2 > D1 > D3.

[0011] In one embodiment, the diameter D3 of the root of the implant is designed to be 2.5 mm to 3.0 mm, and the maximum load that the root can withstand at this size is 285.27 N to 470.12 N; the diameter D1 of the neck of the implant is designed to be 3.5 mm to 5.5 mm, and the maximum diameter D2 of the middle part of the implant is 0.2 mm to 0.3 mm larger than the diameter D1 of the neck.

[0012] In one embodiment, the dental implant is provided with a spiral cutting groove that extends spirally from the root section to the middle section.

[0013] In one embodiment, the thread depth of the middle external thread is greater than that of the root external thread, and the pitch of the root external thread is less than that of the middle external thread.

[0014] In one embodiment, the root external thread structure adopts a gradient design: the thread depth gradually increases towards the root and gradually decreases towards the crown.

[0015] In one embodiment, the neck section is provided with a neck external thread and a smooth neck collar structure, wherein the thread depth of the neck external thread is less than that of the middle external thread and the root external thread.

[0016] In one embodiment, the axial lengths of the neck, middle, and root segments of the dental implant are L1, L2, and L3, respectively, and L2 > L1. The ratio of L1:L2:L3 is L1:(1.5-2.0):(0.5-5), and the value range of L1 is 2.0-3.0 mm, the value range of L2 is 3-6 mm, and the value range of L3 is 1-15 mm.

[0017] The present invention also proposes a dental implant restoration system, including a dental implant as described above, and a matching implantation tool, which includes a pilot drill, a shaping drill and a tapping drill.

[0018] In one embodiment, the pilot drill includes a first rod portion, a drill bit body portion, and a tip portion connected sequentially to each other, wherein the diameter of the drill bit body portion gradually decreases slightly away from the connection to the first rod portion; and / or,

[0019] The forming drill includes a second rod portion and a forming main body portion connected to each other. The forming main body portion has a forming section, the diameter of which gradually decreases in the direction away from the second rod portion, i.e., the forming section is used to form a tapered hole diameter. A guide portion is also provided at the front end of the forming section, the guide portion being a circular blunt-tipped structure; and / or,

[0020] The tapping drill includes a third rod section and a tapping section that are connected to each other.

[0021] The technical solution provided by this invention has the following technical effects:

[0022] 1. This invention proposes a dental implant and a dental implant restoration system. The dental implant includes a neck, a middle section, and a root section connected sequentially. The neck is cylindrical with a diameter D1; the middle section is conical with a maximum diameter D2, and its surface is provided with a central external thread; the root section is cylindrical with a diameter D3, and its surface is provided with a root external thread. The values ​​of D1, D2, and D3 satisfy the following condition: D2 is greater than the maximum values ​​of D1 and D3, and the diameter D2 of the middle section is the largest. In immediate implant clinical applications, when the extraction socket exhibits a distinctly elliptical structure, the threads of the middle section can effectively cut into the mesial and distal bone walls of the extraction socket, thereby assisting in achieving initial stability. When the bone density at the implantation site is extremely low, and even using the longest implant cannot penetrate the cortex to achieve bicortical bone retention, the deep threads of the middle section combined with the conical core design can increase the radial interference between the threads and the socket, thereby obtaining additional mechanical stability. This invention, through its unique implant shape design and matching drilling system, is particularly suitable for alveolar bone conditions with insufficient bone volume or osteoporosis. It can significantly enhance the initial stability of the implant, reduce the risk of implant loosening, and thus effectively improve the implant success rate.

[0023] 2. This invention can optimize the surgical procedure and improve clinical efficiency: The implant drill tool structure designed with this invention is highly efficient, which can quickly and accurately complete the preparation of the implant cavity, shorten the implantation operation time, reduce patient discomfort and treatment costs, and has good clinical application and promotion value.

[0024] 3. This invention can increase implant stability and extend service life: The implant is made of biocompatible grade IV cold-worked titanium material, combined with a specific shape design and drilling system, which can form a more stable osseointegration in the bone, thereby improving the long-term stability and service life of the implant.

[0025] 4. This invention can reduce intraoperative thermal damage and protect bone tissue: The drill used in this invention has an optimized spiral chip removal groove in its structure, which can efficiently remove bone chips, reduce the temperature rise and bone tissue damage during the drilling process, and is conducive to the healing and repair of bone tissue after surgery.

[0026] 5. This invention can reduce preoperative bone volume requirements and reduce bone augmentation procedures: The implant adopts a stepped composite structure design and the root area diameter is relatively small, which reduces the requirements for alveolar bone height and width, avoids the need for a large number of bone augmentation surgeries, and significantly improves patient acceptance and satisfaction.

[0027] 6. This invention improves the standardization and convenience of full-arch implant procedures: In full-arch implant applications, due to differences in bone conditions in different anatomical regions, implant lengths often vary. Traditional procedures require frequent changes of reamers of different lengths or highly concentrated identification marking lines. Using the drilling system provided by this invention, only the drilling depth of the initial drill needs to be controlled; subsequent reaming operations can be completed using drill bits of the same length, thus significantly improving surgical efficiency, reducing the surgeon's workload and psychological burden, and demonstrating clear clinical advantages. Attached Figure Description

[0028] Figure 1 This is a front view of a dental implant according to an embodiment of the present invention;

[0029] Figure 2 This is a front view of a dental implant according to an embodiment of the present invention, showing the marked sections;

[0030] Figure 3 It is a cross-sectional diagram of the alveolar bone;

[0031] Figure 4 This is a cross-sectional view of a dental implant of the present invention implanted in the alveolar bone according to an embodiment of the invention;

[0032] Figure 5 This is a front view of the pilot drill according to an embodiment of the present invention;

[0033] Figure 6 This is a front view of the forming drill according to an embodiment of the present invention;

[0034] Figure 7 This is a front view of the tapping drill according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the dental implant restoration system of this invention used for implant restoration of Class I bone;

[0036] Figure 9 This is a schematic diagram of the dental implant restoration system of this invention used for implant restoration of Class II and Class III bone;

[0037] Figure 10 This is a schematic diagram of a dental implant restoration system according to an embodiment of the present invention used for implant restoration of Class IV bone;

[0038] Figure 11 This is an external implantation diagram of the dental implant restoration system according to an embodiment of the present invention. Detailed Implementation

[0039] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0040] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0041] like Figures 1-11 As shown, this embodiment provides a dental implant restoration system, including a dental implant 1 and matching rapid implantation tools (2, 3, 4). The rapid implantation tools include a pilot drill 2, a shaping drill 3, and a tapping drill 4.

[0042] The dental implant 1 includes a neck 11, a middle portion 12, and a root portion 13 connected sequentially. The neck 11 has a diameter D1. In this embodiment, the neck 11 is cylindrical with a uniform diameter D1. Of course, in some other embodiments, the neck 11 may also be conical with a certain taper, and the diameter D1 may be the maximum diameter of the neck 11.

[0043] The middle portion 12 connects the neck 11 and the root 13. The middle portion 12 has a varying diameter, with a maximum diameter D2. The surface of the middle portion 12 is provided with a central external thread 121. In this embodiment, the middle portion 12 is at least partially tapered, and the diameter of the tapered portion of the middle portion 12 gradually decreases in the direction from the neck 11 to the root 13. Of course, in other embodiments, the diameter of the middle portion 12 can vary in other ways; for example, the middle portion 12 can be entirely tapered, or the diameter of the middle portion 12 can slightly increase in the direction from the neck 11 to the root 13, reaching the maximum diameter D2, and then gradually decrease. That is, the maximum diameter D2 can occur at some point in the middle of the middle portion 12.

[0044] The root portion 13 has a diameter D3. In this embodiment, the root portion 13 is cylindrical with a uniform diameter D3. The surface of the root portion 13 is provided with an external root thread 131. Of course, in some other embodiments, the root portion 13 may also be a cone with a certain taper, and the diameter D3 may be the maximum diameter of the root portion 13.

[0045] Reference Figures 3-4 The alveolar bone 5 typically comprises a first cortical bone 51, cancellous bone 52, and a second cortical bone 53. The first cortical bone 51 is usually the distal cortical bone, and the second cortical bone 53 is usually the mesial cortical bone. Figure 4 The diagram shows a cross-sectional view of the dental implant 1 implanted in the alveolar bone. In this embodiment, compared to D1 and D3, the middle 12-segment of the dental implant 1 has the largest diameter D2, and its threaded structure can penetrate deep into the alveolar bone 5, thereby achieving good initial stability. For the extremely porous alveolar bone 5, the middle 12-segment, combined with the conical core structure design, can produce a certain degree of shaping and compression effect on the bone tissue during implantation, thereby further enhancing the initial retention force. In addition, the largest diameter D2 of the middle 12-segment allows the threads of the middle 12-segment to effectively cut into the mesial and distal bone walls of the extraction socket when the extraction socket presents a distinctly elliptical structure in immediate implantation clinical applications, thus assisting in achieving initial stability. When the bone density at the implantation site is extremely low, and even the longest implant cannot penetrate the cortex to achieve bicortical bone retention, the deep threads of the middle 12-segment combined with the conical core design can increase the radial interference between the threads and the socket, thereby obtaining additional mechanical stability.

[0046] In this embodiment, the diameter distribution of the dental implant 1 is set to D2 > D1 > D3, and the diameter D3 of the root 13 of the implant is designed to be the smallest, so as to balance the structural strength of the implant apical region and the need to avoid important periapical anatomical structures. In this embodiment, the diameter D3 of the root 13 of the implant is designed to be 2.5mm to 3.0mm. Under this size, the maximum load that the implant apical region can withstand is 285.27N to 470.12N, so that the implant root 13 has good structural strength.

[0047] In this embodiment, the diameter D1 of the implant neck 11 is designed to be 3.5mm to 5.5mm to ensure the interface strength between the implant neck 11 and the restorative component, and to achieve a fit design with the natural tooth morphology. The maximum diameter D2 of the implant middle portion 12 is 0.2mm to 0.3mm larger than the diameter D1 of the neck 11, that is, the diameter D2 of the middle portion 12 ranges from 3.7mm to 5.8mm, so as to obtain the ideal implantation torque without causing excessive bone compression. The root portion 13 and the neck 11 can achieve effective contact and stability with the first cortical bone 51 and the second cortical bone 53, respectively, thereby forming a bicortical bone fixation. The middle portion 12 mainly integrates with the cancellous bone 52. The middle portion 12 has a deepened thread structure, that is, the thread depth of the middle external thread 121 is greater than that of the root external thread 131. The deepened thread structure achieves deep embedding, thereby further enhancing the initial mechanical stability.

[0048] In this embodiment, the root segment 13 of the dental implant 1 adopts a uniform small-diameter cylindrical design, and its diameter D3 remains constant regardless of changes in the coronal diameter of the implant. The smaller diameter helps reduce the bone volume requirements during implantation, avoiding adverse events such as lateral perforation or bone tissue damage. During maxillary and mandibular implantation, to achieve bicortical or tricortical bone retention, the smaller diameter of the root segment 13 makes it easier to avoid sensitive anatomical structures such as important neurovascular pathways when traversing certain specific anatomical structures (such as the maxillary sinus, nasal floor, pterygoid process, inferior alveolar nerve, descending palatine artery, and labial undercut area), effectively reducing the risk of complications.

[0049] Since the interference fit between the pre-drill bit and the implant diameter in the root section 13 is stable, it is impossible to obtain additional initial stability by increasing the interference amount. Therefore, the main contribution of this region to the initial stability of the implant comes from the increase in implant length and the effective breakthrough of the root cortex.

[0050] The axial lengths of the neck 11, middle 12, and root 13 sections of dental implant 1 are L1 (range 2.0–3.0 mm), L2 (range 3–6 mm), and L3 (range 1–15 mm), respectively. The lengths of each part of dental implant 1 satisfy the relationship L2 > L1, and their ratio is L1:L2:L3 = 1:(1.5–2.0):(0.5–5). The pitch of the external root thread 131 in the root 13 section is smaller than the pitch of the external thread 121 in the middle section; that is, the external root thread 131 is a slender thread. This slender thread structure is particularly suitable for cases with insufficient bone volume or osteoporosis, allowing for deep implantation into areas with good bone quality and deep penetration into the contralateral cortical bone to achieve bicortical bone fixation, thus improving the initial stability of the implant. Specifically, bicortical fixation refers to the slender threads of the root segment 13 of implant 1 penetrating the proximal cortical bone 53 and extending to the distal cortical bone 51, thereby forming a stable mechanical support structure between the two cortical bones. This structure not only significantly enhances the stability of implant 1 in cases of bone loss or osteoporosis, but also effectively reduces the risk of postoperative loosening, thus significantly improving the success rate and long-term effectiveness of the implant.

[0051] In this embodiment, the root section 13 of the dental implant 1 adopts a columnar structure design, which aims to ensure sufficient mechanical strength of the implant 1 while maintaining a small diameter, thereby reducing the risk of implant 1 fracture. Simultaneously, the external thread 131 of the root section 13 features a gradient design: the thread gradually deepens towards the root, i.e., the external thread 131 gradually deepens along direction A, to enhance the contact area with the cortical bone and achieve good retention; the thread gradually shallows towards the coronal direction to further improve overall strength and reduce the risk of fracture.

[0052] In this embodiment, the design of a uniform diameter in the root section 13 simplifies the surgical procedure. Regardless of changes in the diameter of the implant neck or the local bone density at the implantation site, the root can be prepared with a single drill bit, thereby improving the efficiency of cavity preparation, reducing the frequency of drill bit replacement, and significantly reducing the risk of bone burns.

[0053] In addition, the dental implant 1 is provided with a spiral cutting groove 101, which extends spirally from the root section 13 to the middle section 12. The spiral cutting groove 101 can enhance the self-tapping ability of the dental implant 1 and can effectively cut the neck of the cavity.

[0054] In this embodiment, the primary purpose of the neck segment 11 of the dental implant 1 is to prevent marginal bone loss at the neck edge of the implant 1 due to bone compression. During implantation, the deep threads and self-tapping grooves of the middle segment 12 can effectively cut the neck of the implant cavity. Therefore, after implantation, if the diameter of the neck segment 11 is slightly smaller than that of the middle segment 12, excessive bone compression in the neck area of ​​the implant 1 can be avoided.

[0055] The cervical segment 11 features an external cervical thread 112 and a smooth neck collar structure 111. The external cervical thread 112 is a micro-thread, with a thread depth less than that of the central external thread 121 and the root external thread 131. The external cervical thread 112 helps to reduce the rate of physiological bone remodeling in the cervical region, thereby maintaining the stability of the marginal bone. The smooth neck collar structure 111 effectively reduces bacterial adhesion and growth, lowering the risk of peri-implantitis. These structures, by regulating both physiological and pathological pathways, jointly achieve the control and prevention of alveolar bone resorption in the cervical region.

[0056] According to the bone characteristics of different parts of the alveolar bone, the dental implant 1 of this embodiment adopts differentiated structural morphology and thread design in the root 13, middle 12 and neck 11 sections to better adapt to bone changes, improve the matching degree between implant 1 and bone tissue, and thus obtain excellent initial stability and long-term stability.

[0057] In addition, the spiral cutting groove 101 of the dental implant 1 extends spirally from the root 13 section to the middle 12 section. Combined with the structural distribution of D2>D1>D3, it can give the implant 1 good self-tapping ability, realize active cutting and shaping of bone tissue during the implantation process, effectively simplify the surgical steps and improve implantation efficiency.

[0058] In this embodiment, the dental implant 1 is made of grade IV cold-worked titanium material. This material not only has excellent biocompatibility and can effectively reduce the body's rejection reaction, but also promotes the growth and attachment of bone tissue, thereby further improving the initial stability and long-term service life of the implant.

[0059] The dental implant 1 of this embodiment has undergone mechanical property tests, and the results are as follows:

[0060] (1) Fatigue strength of the dental implant: According to the YY / T 0521-2018 standard, after the implant and the abutment are assembled together, under a load of 15 Hz and 5 million load cycles, the maximum tolerable load of the implant with a diameter of φ3.75 mm is 210 N; the maximum tolerable load of the implant with a diameter of φ4.6 mm is 330 N.

[0061] (2) Root tip strength of the implant: Under the experimental conditions of a force arm of 6 mm and a loading rate of 5 mm / min, the root tip part of the implant is impacted. The maximum load that the root of the implant with a diameter of φ3.75 mm can withstand is 285 N; the maximum load that the root of the implant with a diameter of φ4.6 mm can withstand is 470 N.

[0062] (3) Torsion strength of the implant: The neck of the implant and the root tip of the implant are twisted in opposite directions. The maximum torque of the implant with a diameter of φ3.75 mm is 145 N·cm, and the maximum torque of the implant with a diameter of φ4.6 mm is 160 N·cm.

[0063] It can be seen that the dental implant 1 of this embodiment has good mechanical properties.

[0064] In this embodiment, the rapid implantation tool supporting the dental implant 1 includes a pilot drill 2, a forming drill 3, and a tapping drill 4.

[0065] Referring to Figure 5 , the pilot drill 2 includes a first rod portion 21, a drill bit main body portion 22, and a tip portion 23. The first rod portion 21, the drill bit main body portion 22, and the tip portion 23 are sequentially connected to each other. The first rod portion 21 is used to connect to the driving tool of the drill bit. The diameter of the drill bit main body portion 22 gradually decreases slightly in the direction away from the first rod portion 21, that is, the drill bit main body portion 22 is slightly conical, which is more conducive to drilling into the bone. The tip portion 23 is a gradually tapering tip structure, which is conducive to the initial drilling. The pilot drill 2 of this embodiment has been specifically optimized in terms of diameter and shape design, and can achieve rapid and accurate positioning and hole opening operations in the alveolar bone with insufficient bone mass or osteoporosis, providing a stable initial channel for the subsequent implant implantation. This pilot drill 2 is made of high-strength and wear-resistant materials, has excellent drilling force, and at the same time ensures the geometric stability and service life of the drill bit under high-load conditions.

[0066] Referring to Figure 6The shaping drill 3 includes a second rod portion 31 and a shaping main body portion 32 connected to each other. The shaping main body portion 32 includes a shaping section 321, the diameter of which gradually decreases away from the second rod portion 31, meaning the shaping section 321 can shape a tapered hole. The size and shape of the shaping drill 3 are highly matched to the contour of the implant, and it is used to further enlarge and shape the cavity based on the initial hole made by the pioneer drill 2, making the cavity more in line with the geometric requirements of the implant. Its drill bit is designed with a special spiral chip removal groove structure, which can effectively guide bone chips out, reduce bone tissue damage and temperature rise, thereby improving drilling quality and intraoperative safety.

[0067] Reference Figure 6 A guide section 322 is provided at the front end of the forming section 321. The guide section 322 can guide the forming drill 3. The guide section 322 is a circular blunt-tipped structure without a cutting edge, so the front end of the forming drill 3 is safer in the axial direction and the positioning is more accurate, which is conducive to the subsequent digital work of the instrument.

[0068] Reference Figure 7 The tapping drill 4 includes a third shank 41 and a tapping section 42 connected to each other. The tapping drill 4 is used to tap the bone socket before implantation, creating an internal thread structure within the socket that matches the implant thread. The tapping section 42 has a chip removal groove 421, which is partially inclined to facilitate chip removal. The tapping drill 4 employs a high-precision manufacturing process to ensure the accuracy and consistency of the thread morphology, thereby achieving stable insertion of the implant into the alveolar bone and enhancing initial mechanical stability.

[0069] This embodiment proposes the "All in 2" implantation concept, which means that by optimizing the drill tool structure and operation process, implant cavity preparation can be completed in the vast majority (approximately 99%) of clinical applications with a maximum of only two drilling steps, significantly improving surgical efficiency and implantation accuracy. The optimal operation scheme is as follows:

[0070] A. Implantation methods under cartilage conditions (e.g.) Figure 10 (Class IV bone shown).

[0071] For cartilage areas primarily composed of cancellous bone, only the Pioneer Drill 2 is needed for initial hole preparation, followed by implant placement directly utilizing the implant's self-tapping thread structure. The Pioneer Drill 2's diameter and shape parameters are optimized for rapid hole creation while maintaining positioning accuracy. This drill bit is made of high-strength, wear-resistant materials, possessing excellent torsional resistance and durability. A drilling speed of 500-1000 rpm is recommended, with the drilling depth precisely set based on preoperative CBCT or CT imaging data. Drilling parameters can be adjusted in real-time during the procedure based on bone density to ensure cavity quality and initial implant stability.

[0072] B. Implantation methods under hard bone conditions (e.g.) Figure 8 (Class I bone shown).

[0073] For dense bone areas with a high proportion of cortical bone, the cavity should be further enlarged and refined using the shaping drill 3 after preparation with the pioneer drill 2. The structural parameters of the shaping drill 3 are highly matched to the shape of the implant, and it is equipped with an optimized spiral chip removal groove, which can effectively remove bone chips, reduce heat accumulation, and reduce bone tissue damage. The recommended operating speed is 200-500 rpm, and the torque setting range is 25-50 N·cm. If the bone density is high, the tapping drill 4 can be used for thread pre-cutting as needed to avoid excessive pressure on the bone tissue.

[0074] C. Implantation methods under mixed bone conditions (e.g.) Figure 9 (As shown in the diagram, Class II and Class III bones).

[0075] For mixed bone regions containing both cortical and cancellous bone, the Pioneer Drill 2 is first used to complete the full-length preparation. Subsequently, the depth of the shaping drill 3 is adjusted according to the thickness and density of the cortical bone, typically controlled at around 80% of the total length of the cavity. This strategy combines the shaping drill 3's trimming function in hard bone regions with its self-tapping implantation advantages in cartilage regions, helping to improve the initial stability of implants under complex bone conditions and reduce the risk of complications.

[0076] The dental implant restoration system of the present invention (including a dental implant 1 and matching rapid implantation tools 2, 3, and 4) has the following beneficial effects:

[0077] 1. Improves initial implant stability: This invention, through its unique implant 1 shape design and matching drilling system, is particularly suitable for alveolar bone conditions with insufficient bone volume or osteoporosis. It can significantly enhance the initial stability of implant 1, reduce the risk of implant 1 loosening, and thus effectively improve the implant success rate.

[0078] 2. It can optimize the surgical procedure and improve clinical efficiency: The implant drill tool structure designed with this invention is highly efficient and can quickly and accurately complete the preparation of the implant cavity, shorten the implantation operation time, reduce patient discomfort and treatment costs, and has good clinical application and promotion value.

[0079] 3. It can increase implant stability and extend service life: Implant 1 is made of biocompatible grade 4 cold-worked titanium material. Combined with a specific shape design and drilling system, it can form a more stable osseointegration in the bone, thereby improving the long-term stability and service life of implant 1.

[0080] 4. Reduces intraoperative thermal damage and protects bone tissue: The drill used in this invention has an optimized spiral chip removal groove in its structure, which can efficiently remove bone chips, reduce the temperature rise and bone tissue damage during drilling, and is conducive to postoperative bone tissue healing and repair.

[0081] 5. Reduced preoperative bone volume requirements and fewer bone augmentation procedures: Implant 1 adopts a stepped composite structure design and has a relatively small root diameter, which reduces the requirements for alveolar bone height and width, avoids the need for extensive bone augmentation surgery, and significantly improves patient acceptance and satisfaction.

[0082] 6. Improves the standardization and convenience of full-arch implant procedures: In full-arch implant applications, due to differences in bone conditions in different anatomical regions, the length of the implant often varies. Traditional procedures require frequent changes of reamers of different lengths or highly concentrated identification marking lines. Using the drilling system provided by this invention, only the drilling depth of the initial drill needs to be controlled; subsequent reaming operations can be completed using drill bits of the same length, thus significantly improving surgical efficiency, reducing the surgeon's workload and psychological burden, and demonstrating clear clinical advantages.

[0083] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A dental implant, characterized in that, The device comprises a neck, a middle section, and a root section connected sequentially. The neck is columnar and has a diameter D1. The middle section is at least partially conical, with the diameter of the conical portion gradually decreasing from the neck towards the root, reaching a maximum diameter D2. The surface of the middle section is provided with a central external thread. The root section is columnar and has a diameter D3. The surface of the root section is provided with a root external thread. The values ​​of D1, D2, and D3 satisfy the following order: D2 > D1 > D3. The root section adopts a columnar design with a uniform diameter, and its diameter D3 remains constant as the diameter of the coronal portion of the neck changes. The axial lengths of the segments of the neck, the middle section, and the root section are L1, L2, and L3, respectively, and the ratio of L1:L2:L3 is L1:(1.5~2.0):(0.5~5).

2. The dental implant according to claim 1, characterized in that: The diameter D3 of the root of the implant is designed to be 2.5mm to 3.0mm, and the maximum load that the root can withstand under this size is 285.27N to 470.12N; the diameter D1 of the neck of the implant is designed to be 3.5mm to 5.5mm, and the maximum diameter D2 of the middle part of the implant is 0.2mm to 0.3mm larger than the diameter D1 of the neck.

3. The dental implant according to claim 1, characterized in that: The dental implant is provided with a spiral cutting groove that extends spirally from the root section to the middle section.

4. The dental implant according to claim 1, characterized in that: The thread depth of the middle external thread is greater than that of the root external thread, and the pitch of the root external thread is less than that of the middle external thread.

5. The dental implant according to claim 1, characterized in that: The root external thread structure adopts a gradient design: the thread depth gradually increases towards the root and gradually decreases towards the crown.

6. The dental implant according to claim 1, characterized in that: The neck section is provided with a neck external thread and a smooth neck ring structure, and the thread depth of the neck external thread is less than that of the middle external thread and the root external thread.

7. The dental implant according to claim 1, characterized in that: The value range of L1 is 2.0 to 3.0 mm, the value range of L2 is 3 to 6 mm, and the value range of L3 is 1 to 15 mm.

8. A dental implant restoration system, characterized in that, The dental implant includes the dental implant as described in any one of claims 1-7, and also includes an accompanying implantation tool, said implantation tool including a pilot drill, a shaping drill and a tapping drill.

9. The dental implant restoration system according to claim 8, characterized in that: The pilot drill includes a first rod section, a drill bit body section, and a tip section connected sequentially to each other; the diameter of the drill bit body section gradually decreases slightly away from the section connected to the first rod section; and / or... The forming drill includes a second rod portion and a forming main body portion connected to each other. The forming main body portion has a forming section, the diameter of which gradually decreases in the direction away from the second rod portion, i.e., the forming section is used to form a tapered hole diameter. A guide portion is also provided at the front end of the forming section, the guide portion being a circular blunt-tipped structure; and / or, The tapping drill includes a third rod section and a tapping section that are connected to each other.

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