Single-section inner hexagonal dental implant tooth nail

Abstract

The invention discloses a single-section inner hexagonal dental implant tooth nail, and belongs to the technical field of dental implant restoration. The invention relates to a single-section type inner hexagonal dental implant dental nail, which is of an integrated single-section type forming structure, and a dental nail main body sequentially comprises a head part, a straight body part and a tapered tip end along the axial direction; the head part is provided with an inner hexagonal operation structure, and a hook-shaped fixing structure used for being clamped with a repairing part is machined on the periphery of the head part. At least two first blood grooves which are symmetrically distributed are formed in the side wall of the straight body position; an external thread is arranged on the straight body position; the tapered tip is of a tapered structure adopting R2 and R13 arc transition. The problems that a traditional three-section type dental nail is tedious in operation, poor in osseointegration, unstable in retention and the like are effectively solved, the planting survival rate and the operation efficiency are greatly improved, the medical cost is reduced, and the dental nail has extremely high clinical application value.

Description

Technical Field

[0001] This invention belongs to the field of oral medical device technology, specifically relating to an integrated dental implant screw, which is particularly suitable for alveolar bone implantation and restoration surgery after permanent tooth loss. Through structural optimization, it achieves single implantation, efficient osseointegration and stable retention, representing a technological improvement of the core components of oral implant restoration. Background Technology

[0002] Tooth loss is a common oral disease in clinical practice. Trauma, tooth decay, periodontal disease, and other factors can all lead to tooth loss or extraction, affecting not only the patient's chewing function and facial aesthetics but also causing a series of oral problems such as alveolar bone resorption and tilting of adjacent teeth. Dental implant restoration is currently the preferred solution for restoring missing teeth. Its core component is the implant post, and the structural design of the post directly determines the success rate of the implant surgery, postoperative healing efficiency, and long-term stability.

[0003] Currently, most dental implants used in clinical practice are three-part structures, consisting of the implant abutment, the connecting section, and the implanted prosthesis. However, this structure has revealed several intractable technical drawbacks in long-term clinical application. First, traditional three-part implants lack dedicated drainage channels for body fluids and bone growth. After implantation, tissue fluid and exudate within the alveolar bone cannot drain promptly, easily accumulating and causing local inflammation. Furthermore, the limited contact area between the implant and bone tissue results in slow bone cell attachment and growth, a long osseointegration period, and low survival rates, increasing the risk of implant loosening and dislodgement. Second, the head of the three-part implant uses only a simple planar or threaded connection without a dedicated locking structure, resulting in insufficient bonding force with the upper prosthesis. Prolonged chewing stress can lead to prosthesis loosening and displacement, affecting the implant's lifespan and safety. Third, the flat or slightly tapered tip of traditional implants creates significant resistance during implantation into the alveolar bone, making it difficult for dentists to precisely control the implantation depth and angle, potentially causing alveolar bone cracking, implant displacement, and increasing the probability of surgical failure. Finally, the three-section split structure requires the separate processing of three independent components, followed by high-precision assembly. The processing technology is complex and costly, and bacteria can easily remain in the assembly gaps, leading to postoperative infections. As a result, the overall product qualification rate and clinical applicability are poor.

[0004] In response to the pain points of the existing technologies, the industry urgently needs a dental implant that is structurally simplified, surgically convenient, has efficient osseointegration, and stable retention, in order to overcome the inherent defects of the three-segment dental implant and improve the clinical outcomes of dental implant restoration. Summary of the Invention

[0005] The purpose of this invention is to provide a single-segment internal hexagonal dental implant staple that features a simplified structure, convenient surgery, efficient osseointegration, and stable retention.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: A single-segment internal hexagonal dental implant staple, wherein the staple is an integrated single-segment molded structure, the staple body comprising, along the axial direction, a head, a straight body, and a tapered tip; the head is provided with an internal hexagonal operating structure, and the outer periphery of the head is machined with a hook-shaped retention structure for engaging with the prosthetic component; the sidewall of the straight body has at least two symmetrically distributed first blood grooves; the straight body is provided with external threads; the tapered tip is a tapered structure with a transition of R2 and R13 arcs.

[0007] The dental implant is integrally machined / milled from medical-grade TA4 titanium alloy, with no splicing or assembly gaps. It features a continuous and complete structure, consisting of a head, a straight body, and a tapered tip, allowing for single-session implantation. The straight body uses a standard M2 external thread, machined integrally with the implant body to provide insertion guidance and ensure precise implantation depth. The tapered tip employs a tapered structure with R2 and R13 rounded transitions and a tip diameter of φ2mm, significantly reducing alveolar bone resistance during implantation and improving surgical controllability. The hook-shaped retention structure at the head rigidly engages with the prosthesis, preventing loosening or displacement and enhancing long-term retention stability.

[0008] Furthermore, the precision grade of the hexagonal internal operating structure is H2, and the dimensional tolerance of the hexagonal internal corner is +0.10mm / +0.05mm. The head is the core area for surgical operation and connection with the prosthesis. An H2 precision hexagonal internal structure with a dimensional tolerance of +0.10mm / +0.05mm is set at the center to accommodate specialized implantation tools, enabling precise torque transmission and implantation. The outer periphery of the head is machined with a hook-shaped retention structure, forming a rigid engagement with the upper prosthetic component, improving connection stability.

[0009] Specifically, the hook-shaped retention structure is an annular hook groove arranged around the outer periphery of the head. The depth of the hook groove is 0.3mm-0.5mm and the width is 0.4mm-0.6mm, forming an interference fit with the repair component.

[0010] Specifically, the first blood groove is an axially extending arc-shaped groove with a depth of 0.2mm-0.4mm and a width of 1mm-2mm, and the blood groove runs through the entire axial length of the straight-body position. The first blood groove, which is an axially extending arc-shaped groove, is symmetrically distributed on the side wall of the straight-body position. It is used for the drainage of alveolar bone tissue fluid and the channel for bone cell growth, increasing the contact area between bone tissue and dental post, promoting osseointegration, and reducing the risk of inflammation.

[0011] Specifically, the tapered tip (7) has two symmetrically distributed second blood grooves (8) on its side. The second blood grooves (8) are circular grooves with a depth of 0.3 mm. The second blood grooves (8) are close to the side of the straight body position (4) and are distributed on the same axial center line as the first blood groove (5) to form a drainage connection with the first blood groove (5).

[0012] Specifically, the dental implant is made of medical-grade TA4 titanium alloy, with a surface roughness Ra≤1.6μm, and all unmarked chamfers are C0.2. The dental implant uses medical-grade TA4 titanium alloy, which meets national standards for medical implant materials and exhibits excellent biocompatibility. The surface is medical-grade polished, with a roughness Ra≤1.6μm, and all unmarked chamfers are C0.2, avoiding sharp edges that could damage oral soft tissues and improving processing precision and clinical safety.

[0013] Preferably, the overall length of the dental nail is 8mm-15mm.

[0014] Preferably, there are four first blood grooves and four second blood grooves, and the four first blood grooves and four second blood grooves are evenly and symmetrically distributed along the circumference of the straight body. The symmetrical blood grooves in the straight body position drain tissue fluid, avoid stagnation and inflammation, provide bone growth channels, and improve bone integration efficiency and survival rate.

[0015] Preferably, the external thread has a triangular thread profile and a pitch of 0.4 mm, and the thread and the main body of the thread pin are integrally formed.

[0016] The present invention has the following beneficial effects: This invention employs an integrated, single-segment structure, eliminating the need for separate assembly. Doctors can complete the implantation and restoration connection in a single surgery, completely eliminating the need for secondary surgeries, significantly shortening the treatment cycle, reducing surgical trauma and pain for patients, and improving the overall medical experience. A straight, symmetrical blood groove allows for rapid drainage of tissue fluid, preventing local inflammation. Simultaneously, it provides space for bone cell attachment and growth, increasing the contact area between the implant and bone tissue, improving osseointegration speed by over 30%, and significantly increasing implant survival rate. The hook-shaped retention structure at the head forms a rigid engagement with the restoration component, combined with the M2 straight thread for tight occlusion with the alveolar bone, increasing overall retention force by 50%. Even after long-term chewing stress, there is no loosening or displacement, extending the implant's lifespan to over 15 years. The tapered tips with R2 and R13 rounded transitions allow for easy entry into the alveolar bone during implantation, reducing resistance by 40%. Doctors can precisely control the implantation angle and depth, preventing alveolar bone cracking and implant displacement, resulting in a near 100% success rate.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the single-segment internal hexagonal dental implant screw of the present invention; Figure 2 This is a schematic diagram of the main structure of the single-segment internal hexagonal dental implant screw of the present invention; In the diagram: 1-head, 2-internal hexagonal structure, 3-hook-shaped retaining structure, 4-straight body position, 5-first blood groove, 6-external thread, 7-tapered tip, 8-second blood groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0022] The single-segment internal hexagonal dental implant of this invention is integrally machined without any separate parts. It is entirely made of medical-grade TA4 titanium alloy, conforming to the standard YY / T0605-2016 "Surgical Implant Metal Materials: Titanium and Titanium Alloy Processed Products". Specific structural dimensions are as follows: The head (1) is the operating and connecting end of the dental screw, with an outer diameter of φ4.3mm; the center is equipped with an internal hexagonal structure (2), with a side dimension of 2mm and a tolerance of +0.10mm / +0.05mm, which is compatible with a special implant torque wrench to achieve precise implantation operation; the outer periphery of the head is machined with a hook-shaped retention structure (3), with a width of 0.8mm, which forms an interference fit with the connecting end of the upper porcelain / all-ceramic restoration to ensure that the connection is not loose.

[0023] The straight body position (4) is the core area of ​​bone integration, with an axial length of 5 mm. Two symmetrically distributed first blood grooves (5) are opened on the side wall. The first blood groove is an arc-shaped groove with a depth of 0.3 mm and a width of 1.5 mm. It runs through the entire length of the straight body position along the axial direction of the dental screw and is used for tissue fluid drainage and bone cell growth.

[0024] The straight body (4) is provided with an external thread (6). The external thread (6) adopts the M2 standard external thread, the thread profile is triangular, and the pitch is 0.4mm. The thread is integrally processed with the main body of the screw, and the surface roughness is consistent with the main body. It can be accurately guided when screwed in to ensure uniform implantation depth.

[0025] The tapered tip (7) serves as the implantation guide and features a tapered structure with a rounded transition of R2 and R13. The rounded transition design avoids damage to the alveolar bone from sharp edges and corners, resulting in minimal resistance during implantation and improved surgical maneuverability. Two symmetrically distributed second blood grooves (8) are provided on the side of the tapered tip (7). The second blood grooves (8) are circular grooves with a depth of 0.3 mm. The second blood grooves (8) are close to the side of the straight body position (4) and are distributed on the same axial center line as the first blood groove (5) to form a drainage connection with the first blood groove (5).

[0026] The total length of the dental post is 10mm, which can be adjusted within the range of 8mm-15mm according to the clinical alveolar bone height and the location of the missing tooth; the surface is polished with medical-grade mirror finish, with a roughness Ra≤1.6μm, and all unmarked chamfers are C0.2 to eliminate sharp edges and protect oral soft tissues.

[0027] The material uses medical-grade TA4 titanium alloy, whose chemical composition meets the requirements for medical implantation. The Ti content is ≥90%, the Al content is 5.5%-6.5%, and the V content is 3.5%-4.5%. This material has the characteristics of low density, high strength, strong corrosion resistance, and excellent biocompatibility. After implantation, it does not cause rejection or allergies in the human body, making it the preferred material for dental implants.

[0028] The single-segment internal hexagonal dental implant staple in this embodiment is manufactured using an integrated CNC lathe and machining center. First, the TA4 titanium alloy bar is turned into the basic shape of the staple body, then the internal hexagonal structure, hook-shaped retention structure (3), first blood groove (5) and second blood groove (8) are milled, and finally the threads are machined and the surface is polished. High-precision CNC equipment is used throughout the process, and the machining error is controlled within ±0.02mm to ensure accurate structural dimensions. Medical-grade electrochemical polishing process is used to remove machining marks and burrs, so that the surface roughness reaches Ra≤1.6μm. The polished surface is smooth and dense, making it less prone to plaque and bacteria adhesion, reducing the risk of postoperative infection, and improving the adhesion ability of bone cells.

[0029] The single-segment internal hexagonal dental implant of this invention achieves its core working effect through structural integration and functional synergy, as detailed below: The R2 and R13 arc transition structures at the tapered tip first contact the alveolar bone drilling position to form a precise guide; the M2 straight thread section is screwed into the alveolar bone with the tool, and the thread bites into the bone tissue, gradually fixing the dental implant in the preset position. The resistance is small and the positioning is accurate throughout the process, avoiding implant displacement; after the dental implant is implanted, the tissue fluid and exudate in the alveolar bone are quickly drained through the symmetrical first blood groove (5) and second blood groove (8) in the straight position, avoiding fluid accumulation and inflammation; the groove structure of the first blood groove (5) provides attachment sites for bone cells. Bone cells grow along the blood groove axis, gradually wrapping the dental implant, increasing the bonding area between the bone tissue and the dental implant, and achieving rapid and stable osseointegration. The internal hexagonal structure of the head transmits the torque of the implant tool to ensure uniform implantation force; the hook-shaped retention structure forms a rigid engagement with the restoration component, with no gaps or relative displacement at the connection surface. The biting force during chewing is evenly transmitted to the dental implant and alveolar bone through the restoration, avoiding local stress concentration and ensuring long-term stability.

[0030] Because of its single-section, integrated structure with no assembly gaps, bacteria can not grow in any gaps. The smooth titanium alloy material and the chamfered design without sharp edges further reduce the risk of soft tissue damage and infection, enabling rapid postoperative healing.

[0031] The clinical implantation process is as follows: S1. Preoperative preparation: The doctor uses an oral CT scan to determine the alveolar bone density, height and width of the patient to determine the implantation position and depth of the dental implant and selects a dental implant of the present invention with an appropriate size.

[0032] S2. Alveolar bone preparation: Using a special implant drill bit, a hole is drilled at the preset position. The diameter of the hole matches the straight thread section of the dental implant, and the depth is consistent with the implantation depth of the dental implant.

[0033] S3. Dental screw implantation: Use a special torque wrench with the internal hexagonal structure of the dental screw head to screw the dental screw in clockwise; the tapered tip guides the straight thread section to gradually screw into the alveolar bone until the head is flush with the surface of the alveolar bone. The implantation process only takes 3-5 minutes.

[0034] S4 restoration connection: The upper restoration component is engaged with the hook-shaped retention structure on the head of the dental implant. After confirming a secure connection, the entire implant restoration surgery is completed. No secondary surgery is required after the procedure, and the implant can be used normally once the bone augmentation has healed.

[0035] Multiple Specification Implementation Examples To adapt to different clinical needs, the present invention can adjust structural parameters to form products of multiple specifications, as follows: Example 1: Standard dental screw With a total length of 10mm, two symmetrical blood grooves are created in the straight position, which is suitable for anterior tooth implants with conventional alveolar bone height and density.

[0036] Example 2: Extended dental screw The total length is 12mm, the straight body length is 6mm, and the straight thread section length is 7mm, making it suitable for posterior tooth implantation in cases of insufficient alveolar bone height.

[0037] Example 3: Multi-groove type dental screw The straight-body position features four circumferentially evenly distributed blood grooves, increasing the total contact area of ​​the blood grooves by 50%, making it suitable for patients with low bone density and poor healing ability.

[0038] Example 4: Fine-tipped dental screw The tapered tip has a diameter of φ1.8mm, with R1 and R10 rounded transitions, making it suitable for alveolar bone implants with thin bone walls that are prone to cracking.

[0039] Performance verification of Examples 1-4 above: This invention has been verified by a third-party medical device testing institution, and all its performance indicators are superior to those of traditional three-segment dental screws. Biocompatibility: Meets ISO10993 standards, and is non-cytotoxic, non-sensitizing, and non-irritating.

[0040] Retention force: The pull-out force of the hook-shaped retention structure is ≥500N, which is much higher than the 200N of the traditional connection structure.

[0041] Bone integration rate: ≥90% after 3 months of implantation, compared to only 60% for traditional dental screws.

[0042] Implantation resistance: Tapered tip implantation resistance ≤10N, traditional flat tooth screw resistance ≥25N.

[0043] Machining accuracy: dimensional error ≤ ±0.02mm, pass rate ≥ 99%.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A single-segment internal hexagonal dental implant pin, characterized in that, The dental stud is an integrated single-segment molding structure. The main body of the dental stud includes a head, a straight body, and a tapered tip along the axial direction. The head is provided with an internal hexagonal operating structure, and the outer periphery of the head is machined with a hook-shaped retention structure for engaging with the repair component. The sidewall of the straight body has at least two symmetrically distributed first blood grooves. The straight body is provided with external threads. The tapered tip is a tapered structure with a transition of R2 and R13 arcs.

2. The single-segment internal hexagonal dental implant screw according to claim 1, characterized in that, The precision grade of the internal hexagonal operating structure is H2, and the dimensional tolerance of the internal hexagon is +0.10mm / +0.05mm.

3. The single-segment internal hexagonal dental implant pin according to claim 1, characterized in that, The hook-shaped retention structure is an annular hook groove arranged around the outer periphery of the head. The depth of the hook groove is 0.3mm-0.5mm and the width is 0.4mm-0.6mm, forming an interference fit with the repair component.

4. The single-segment internal hexagonal dental implant screw according to any one of claims 1-3, characterized in that, The first blood groove is an axially extending arc-shaped groove with a depth of 0.2mm-0.4mm and a width of 1mm-2mm, and the blood groove runs through the entire axial length of the straight body.

5. The single-segment internal hexagonal dental implant screw according to claim 4, characterized in that, The tapered tip (7) has two symmetrically distributed second blood grooves (8) on its side. The second blood grooves (8) are circular grooves with a depth of 0.3 mm. The second blood grooves (8) are close to the side of the straight body position (4) and are distributed on the same axial center line as the first blood groove (5) to form a drainage connection with the first blood groove (5).

6. The single-segment internal hexagonal dental implant screw according to claim 1, characterized in that, The dental stud is made of medical-grade TA4 titanium alloy, and the surface roughness Ra of the dental stud is ≤1.6μm.

7. The single-segment internal hexagonal dental implant screw according to claim 1, characterized in that... The overall length of the dental nail is 8mm-15mm.

8. The single-segment internal hexagonal dental implant screw according to claim 5, characterized in that, There are four first blood grooves and four second blood grooves, and the four first blood grooves and four second blood grooves are evenly and symmetrically distributed along the circumference of the straight body.

9. The single-segment internal hexagonal dental implant screw according to claim 5, characterized in that, The external thread has a triangular thread profile and a pitch of 0.4 mm. The thread and the main body of the thread pin are integrally machined.

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