Subperiosteal implant with an anti-exposure barrier, optimized biomechanics

Abstract

The utility model belongs to oral cavity implant technology field, concretely relates to a kind of subperiosteal implant with anti-exposure barrier, optimization biomechanics, it includes: bone paste support, to adhere to jaw bone and carry out fixation;Base, set on bone paste support, for passing through gum tissue and connecting restoration;Anti-exposure barrier structure, set in the transition area of bone paste support and base connection and close transition area;Retention structure, to connect bone paste support fixedly to jaw bone.The utility model improves the structure of implant, and the connecting transition area of bone paste support and base is closed by anti-exposure shielding structure, avoid external microorganism and impurity to enter and influence the microenvironment at bone paste support place, and improve the stability of implant implantation, reduce local stress concentration and cutting effect to soft tissue, to ensure the compatibility of implant after implantation with organism, long time use can keep stable and reliable, avoid appearing discomfort and organism damage.

Description

Technical Field

[0001] This invention belongs to the field of dental implant technology, specifically relating to a subperiosteal implant with an anti-exposure barrier and optimized biomechanics, for implant restoration in patients with severe alveolar bone atrophy. Background Technology

[0002] Subperiosteal implants are implant structures that achieve retention without drilling holes in the implant socket. They are particularly suitable for patients with severe bone loss and offer significant advantages such as personalized design, no need for bone augmentation surgery, and minimal surgical trauma. Existing subperiosteal implants typically include a bone-fitting framework that conforms to the surface of the jawbone, and an abutment mounted on the framework. The abutment passes through the gingiva to connect to the superstructure prosthesis. For example, Chinese patent CN219720914U discloses a butterfly-shaped subperiosteal implant, including a framework and anterior and posterior wings connected to the framework, with an abutment on the framework for passing through the gingiva.

[0003] However, existing subperiosteal implants face a prominent problem in clinical application: soft tissue exposure is prone to occur at the connection between the implant scaffold and abutment, as well as at the scaffold edges. In current technologies, additively manufactured subperiosteal implants, after prolonged use, exhibit partial exposure, soft tissue infection, or persistent infection. Inadequate sealing between the abutment and soft tissue at the mucosal penetration point is considered a major cause of failure, allowing bacteria to easily colonize and multiply in the substructure of the implant. Studies have indicated that micro-gaps at the implant-abutment interface provide channels for microbial leakage; when the abutment is under stress, fine metal debris may be "pumped" into the surrounding soft tissue, causing soft tissue inflammation and even bone resorption. In current subperiosteal implant designs, the upper part of the scaffold is directly connected to the abutment, lacking a specialized structure for soft tissue sealing. This makes the soft tissue prone to retraction after healing, exposing the scaffold portion of the implant, thus leading to bacterial invasion and chronic infection.

[0004] It is evident that the current subperiosteal implant structure still has room for improvement and should be optimized to enhance the sealing of the mucosa at the mucosal abutment, preventing external microorganisms and impurities from entering and affecting the microenvironment at the bone fusion framework. This would improve the stability and reliability of the subperiosteal implant for long-term use. Therefore, a more reasonable technical solution is needed to address the technical problems existing in the current technology. Utility Model Content

[0005] To address some of the problems existing in the prior art, this utility model discloses a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. By adjusting the structure at the abutment, a shielding structure is formed at the abutment to cover the area where the bone embrasure connects to the abutment, blocking external microorganisms and impurities, ensuring the stability of the microenvironment at the bone embrasure, and thus avoiding discomfort problems that may occur after long-term use of the implant.

[0006] To achieve the above objectives, the implant disclosed in this utility model can adopt the following solution: A subperiosteal implant with an exposure-protected barrier and optimized biomechanics, comprising: Osteofitting framework, used to fit and fix the jawbone; The abutment, set on the bone veneer framework, is used to pass through the gingival tissue and connect to the restoration; An exposure barrier structure is placed in the transition area connecting the bone fitting scaffold and the abutment and seals off the transition area. Retention structures are used to fix the bone fitting framework to the jawbone.

[0007] The aforementioned implant fits the jawbone through a bone-fitting framework and has an abutment for connection and repair. The anti-exposure barrier structure set at the abutment and bone-fitting framework can seal the implant after the periosteum and soft tissue are repositioned and covered, preventing external microorganisms and impurities from entering the microenvironment between the implant and the periosteum and soft tissue and disrupting the balance of the microenvironment. This maintains the long-term stability and reliability of the implant and avoids causing discomfort to the human body.

[0008] Furthermore, the abutment structure can be constructed in various forms, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the abutment includes a transgingival segment and a fixed segment. The transgingival segment corresponds to and passes through the gingival tissue penetration area, and the fixed segment is located on the transgingival segment and used to connect the restoration. When adopting the above scheme, the transgingival segment and the gingival segment can be integrally formed.

[0009] Furthermore, when the transgingival segment is fitted with the bone veneer, the connection can be achieved through various methods, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the lower part of the transgingival segment forms a connecting segment that connects and mates with the bone veneer. The outer diameter of the connecting segment is smaller than the outer diameter of the transgingival segment, and the connection between the connecting segment and the transgingival segment forms a stepped transition surface. With the above method, the connecting segment and the transgingival segment are integrally formed, and the bone veneer has a corresponding connecting hole structure that mates with the connecting segment.

[0010] Furthermore, the anti-exposure shielding structure is used to seal the fit between the bone scaffold and the abutment, maintaining the stability of the microenvironment at the bone scaffold. This can be achieved through various methods, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the anti-exposure barrier structure includes a barrier membrane that extends from the stepped transition surface of the abutment to the upper surface of the bone scaffold, with the thickness of the barrier membrane gradually decreasing. When using the above method, the barrier membrane is made of a biocompatible material, and when it fits with the bone scaffold, it can be bonded by sintering, laser welding, snap-fit ​​connection, or integral printing.

[0011] Furthermore, since the barrier membrane comes into contact with the periosteum and soft tissues, to avoid soft tissue recession after prolonged use, which could lead to partial exposure of the implant and provide a pathway for bacterial colonization and reproduction, the bonding between the barrier membrane and soft tissue should be more stable and reliable, providing a good sealing effect and preventing exposure of the internal bone veneer. Its structure is not uniquely limited; here, optimization is proposed, and one feasible option is: the surface of the barrier membrane is distributed with several micropores. These micropores guide the ingrowth of gingival fibroblasts and connective tissue to form a sealing anchor. When using the above scheme, the barrier membrane fully covers the transition area between the bone veneer and the abutment, forming a coverage width of 3mm~5mm. This not only directly provides coverage and blocks the entry of external microorganisms and impurities but also allows gingival fibroblasts to directly bond with the barrier membrane to form a mechanical anchor, improving the sealing effect and bonding stability.

[0012] Furthermore, the barrier membrane is closely attached to the periosteum and soft tissues. If there is significant stress concentration at the attachment point, it can easily damage the periosteum and soft tissues. Therefore, the structure of the barrier membrane can be adjusted to avoid stress concentration and edge cuts to the periosteum and soft tissues. Here, we propose one feasible option: the edge of the barrier membrane forms a rounded, rolled structure or an arc-shaped transition surface. When using this approach, if the edge thickness of the barrier membrane is small, it is rolled up; if the edge thickness is relatively large, its edge can be directly set as a rounded transition surface. This surface contact replaces line contact or even point contact, avoiding stress concentration, edge cutting effects, and irritation, protecting the periosteum and soft tissues, reducing the risk of soft tissue recession, and improving post-implantation compatibility.

[0013] Furthermore, the surface environment of the barrier membrane can be modified to improve post-implantation adaptability and reduce abnormal reactions. Here, we propose one feasible option: the surface of the barrier membrane is formed with a protective coating and / or a sustained-release layer. When using the above approach, the protective coating can be an antibacterial coating to inhibit bacterial colonization early and reduce the risk of postoperative infection; the sustained-release layer can be a drug sustained-release layer, loaded with antibiotics or growth factors, to promote soft tissue healing and provide antibacterial effects.

[0014] Furthermore, the bone aligning framework connects and engages with the jawbone. This fixed connection ensures the stability and reliability of the upper abutment and prosthesis. Various methods can be used to connect and fix the bone aligning framework; here, we optimize and propose one feasible option: the retention structure includes several threaded locking elements that pass through the bone aligning framework and fix it to the jawbone. Using this approach, multiple locking holes can be provided on the bone aligning framework, through which the threaded locking elements are connected to the jawbone, maintaining the connection and engagement between the bone aligning framework and the jawbone.

[0015] Furthermore, when the threaded connector is installed on the bone fitting framework, the protruding part at the tail of the threaded connector can easily cause local stress concentration and cutting effect on the periosteum and soft tissue, resulting in irritation and damage to the periosteum and soft tissue. Therefore, the structure of the threaded connector can be adjusted, and its structure is not limited to one specific one. Here, we propose one feasible option for optimization: the base is provided with a mating hole for the threaded locking member to pass through, and the inner bottom of the mating hole also forms a circumferential anti-rotation structure. The threaded locking member forms a circumferential limiting structure that corresponds to the circumferential anti-rotation structure and is used to maintain the stability of the base in the circumferential direction. When adopting the above solution, the threaded locking member can be a screw, and the threaded locking member is placed in the mating hole. The threaded locking member passes through the bottom of the base and the bone fitting framework, and directly penetrates into the jawbone for connection and fixation. This realizes the connection and fit of the bone fitting framework on the jawbone, and also realizes the fixation and fit of the base. This reduces the number of externally installed threaded locking members and avoids damage to the periosteum and soft tissue caused by the threaded connector remaining externally. The circumferential anti-rotation structure set within the mating hole corresponds to the circumferential limiting structure on the threaded locking component, maintaining the stability of the base in the circumferential direction and preventing circumferential loosening or even slippage and rotation. In some designs, the circumferential anti-rotation structure and the circumferential limiting structure can employ a corresponding matching structure of limiting grooves and limiting blocks, such as using polygonal limiting grooves and polygonal limiting blocks, which, after mating, achieve synchronous circumferential fixation.

[0016] Furthermore, to further improve the structural stability of the osteofitting framework on the jawbone, the structure of the osteofitting framework can be configured in various forms, and its structure is not limited to a single one: several auxiliary retention structures are formed on the osteofitting framework to maintain a stable fit between the osteofitting framework and the jawbone. When adopting the above scheme, the auxiliary retention structures include auxiliary retention claws, which can fit and hold the jawbone tightly, thereby improving the stability of the fit between the osteofitting framework and the jawbone.

[0017] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this utility model include: This invention improves the structure of the implant by sealing the transition area between the bone fusion scaffold and the abutment through an anti-exposure shielding structure. This prevents external microorganisms and impurities from entering and affecting the microenvironment at the bone fusion scaffold, thereby ensuring the compatibility of the implant with the body after implantation. It can remain stable and reliable for long-term use, avoiding discomfort and damage to the body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the implant disclosed in Example 1.

[0020] Figure 2 This is a cross-sectional view of the implant disclosed in Example 2.

[0021] Figure 3 Diagram showing the fit of the implant when it is inserted into the jawbone.

[0022] Figure 4 This is a schematic diagram of the continuously extending shielding film in Example 5.

[0023] In the above attached figures, the meanings of each number are as follows: 1. Jawbone; 2. Bone fitting framework; 201. Auxiliary retention claw; 3. Anti-exposure barrier structure; 4. Abutment; 401. Fixation segment; 402. Transgingival segment; 403. Connecting segment; 404. Mating hole; 5. Sealing gasket; 6. Threaded locking element; 601. Circumferential limiting structure. Detailed Implementation

[0024] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this embodiment.

[0025] In view of the fact that microorganisms are prone to colonization after implantation and use in the prior art, which can damage the implant's microenvironment and cause discomfort or even injury to the body, the following embodiments are optimized and overcome the defects of the prior art.

[0026] Example 1 like Figure 1As shown, this embodiment provides a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. It aims to form a seal around the implant area to prevent external microorganisms and impurities from entering and causing damage. At the same time, it reduces local stress concentration between the implant and the periosteum and soft tissue, and avoids the implant structure from causing unnecessary stimulation and cutting effects on the periosteum and soft tissue, thereby improving the overall stability and reliability of the implant.

[0027] As a subperiosteal implant disclosed in this embodiment, one of its structures includes: The osteofitting framework 2 is used to fit and fix the jawbone 1. Specifically, it is a thin-layer framework structure that is customized according to the surface morphology of the jawbone 1 and fits onto the surface of the jawbone 1.

[0028] Preferably, in this embodiment, the bone patency scaffold 2 is made of medical-grade titanium alloy (TC4 or TC4 ELI) or medical-grade pure titanium by 3D printing (electron beam melting or selective laser melting), and its thickness is 0.3 mm to 1.0 mm. The bone patency scaffold 2 can be configured as a mesh structure according to the anatomical morphology of the jawbone 1, achieving lightweight while ensuring mechanical stiffness. The equivalent diameter of the mesh holes is 1.0 mm to 3.0 mm, and the porosity is 40% to 70%. The bone patency scaffold 2 is provided with 2 to 8 screw holes, the inner diameter of which is 1.5 mm to 2.5 mm, for inserting retention screws to fix the scaffold to the bone surface.

[0029] As the subperiosteal implant disclosed in this embodiment, its second structure includes: Abutment 4, set on bone veneer 2, is used to pass through gingival tissue and connect to the prosthesis.

[0030] The abutment 4 can be constructed in various forms, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the abutment 4 includes a transgingival segment 402 and a fixed segment 401. The transgingival segment 402 corresponds to and passes through the gingival tissue penetration area, and the fixed segment 401 is located on the transgingival segment 402 and is used to connect the restoration. When the above scheme is adopted, the transgingival segment 402 and the gingival segment can be integrally formed.

[0031] Preferably, in this embodiment, the abutment 4 is made of titanium alloy, zirconia ceramic, or PEEK (polyetheretherketone), and the diameter of the transgingival segment 402 is 3.0 mm to 5.0 mm; the top of the fixing segment 401 is provided with a threaded hole or an internal conical surface structure. The diameter of the connecting post at the bottom of the abutment 4 is narrower than that of the transgingival segment 402 by 0.5 mm to 1.0 mm, forming a stepped transition, and this stepped surface serves as the upper support surface of the barrier layer.

[0032] When the transgingival segment 402 is fitted with the bone patency frame 2, the connection can be achieved through various methods, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the lower part of the transgingival segment 402 forms a connecting segment 403 that connects and mates with the bone patency frame 2. The outer diameter of the connecting segment 403 is smaller than the outer diameter of the transgingival segment 402, and a stepped transition surface is formed at the connection between the connecting segment 403 and the transgingival segment 402. When the above solution is adopted, the connecting segment 403 and the transgingival segment 402 are integrally formed, and the bone patency frame 2 forms a connecting hole structure that corresponds to the connecting segment 403.

[0033] Preferably, a sealing gasket 5 is provided at the connecting section 403 to seal the connection interface between the bone fitting scaffold 2 and the abutment 4. The sealing gasket 5 is made of medical-grade silicone rubber or polytetrafluoroethylene, with a thickness of 0.1 mm to 0.5 mm and a compression ratio of 10% to 30%. The surface of the sealing gasket 5 has a micro-protrusion or micro-groove structure, with a protrusion height or groove depth of 5 μm to 20 μm.

[0034] As the subperiosteal implant disclosed in this embodiment, its third structure includes: An exposure barrier structure 3 is set in the transition area connecting the bone fitting support 2 and the base 4 and seals the transition area.

[0035] The anti-exposure shielding structure is used to seal the fit between the bone scaffold 2 and the abutment 4, maintaining the stability of the microenvironment at the bone scaffold 2. This can be achieved through various methods, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the anti-exposure barrier structure 3 includes a barrier membrane that extends from the stepped transition surface of the abutment 4 to the upper surface of the bone scaffold 2, while the thickness of the barrier membrane gradually decreases. When using the above method, the barrier membrane is made of a biocompatible material, and when it fits with the bone scaffold 2, it can be bonded by sintering, laser welding, snap-fit ​​connection, or integral printing.

[0036] Preferably, the thickness of the central region where the barrier membrane mates with the abutment 4 is 0.3 mm to 0.8 mm, and the thickness of the edge region where the barrier membrane extends toward the bone-fitting scaffold 2 is 0.1 mm to 0.3 mm, forming a progressive transition interface that allows soft tissue to smoothly transition from the surface of the barrier membrane to the periosteum, reducing interface stress concentration.

[0037] The barrier membrane comes into contact with the periosteum and soft tissues. To prevent soft tissue recession during prolonged use, which could lead to partial exposure of the implant and provide a pathway for bacterial colonization and reproduction, the barrier membrane should have a more stable and reliable bond with the soft tissue, providing a good sealing effect and preventing exposure of the internal bone veneer 2. Its structure is not uniquely limited; this embodiment optimizes and adopts one feasible option: the surface of the barrier membrane has several micropores distributed on it. These micropores guide the ingrowth of gingival fibroblasts and connective tissue to form a sealing anchor. With this approach, the barrier membrane completely covers the transition area between the bone veneer 2 and the abutment 4, forming a coverage width of 3mm to 5mm. This not only directly provides coverage and blocks the entry of external microorganisms and impurities but also allows gingival fibroblasts to directly bond with the barrier membrane to form a mechanical anchor, improving the sealing effect and bonding stability.

[0038] Preferably, the micropores have a pore size of 50 μm to 200 μm, a porosity of 30% to 60%, and a pore depth of 100 μm to 500 μm. This microporous structure promotes the ingrowth of gingival fibroblasts and connective tissue, forming a "soft tissue-barrier layer" for mechanical anchoring and enhancing the durability of the seal. The microporous structure can be formed by at least one of the following methods: direct 3D printing, acid etching, anodizing, or laser drilling.

[0039] The barrier membrane is in close contact with the periosteum and soft tissues. If there is significant stress concentration at the contact point, it can easily damage the periosteum and soft tissues. Therefore, the structure of the barrier membrane can be adjusted to avoid stress concentration and edge cuts to the periosteum and soft tissues. This embodiment optimizes this by adopting one feasible option: the edge of the barrier membrane forms a rounded, rolled structure or an arc-shaped transition surface. When using the above solution, if the edge thickness of the barrier membrane is small, it is rolled up; if the edge thickness of the barrier membrane is relatively large, its edge can be directly set as a rounded transition surface. In this way, surface contact replaces line contact or even point contact, which can avoid stress concentration, edge cutting effects and irritation, protect the periosteum and soft tissues, reduce the risk of soft tissue recession, and improve post-implantation compatibility.

[0040] Preferably, the curling radius of the roll-up structure is 0.2 mm to 0.8 mm, and the radius of curvature of the rounded corner edge is not less than 0.3 mm.

[0041] Preferably, the barrier membrane includes a collagen membrane, soft tissue taken from other parts of the patient's body, etc., which can improve biocompatibility, enhance the overall recovery effect, improve closure, and reduce some adverse reactions in the later stage.

[0042] Furthermore, the surface environment of the barrier membrane can be modified to improve post-implantation adaptability and reduce abnormal reactions. This embodiment optimizes and adopts one feasible option: a protective coating and / or a sustained-release layer are formed on the surface of the barrier membrane. When adopting the above solution, the protective coating can be an antibacterial coating to inhibit bacterial colonization early and reduce the risk of postoperative infection; the sustained-release layer can be a drug sustained-release layer, which can be loaded with antibiotics or growth factors to promote soft tissue healing and provide antibacterial effects.

[0043] Preferably, the coating material is a chitosan-silver ion complex, silver nanoparticles, or polyhexamethylene biguanide (PHMB), and the coating thickness is 10 nm to 500 nm. The sustained-release period of the antibacterial coating is designed to be 7 to 28 days.

[0044] Preferably, a drug-releasing layer made of absorbable polymer material is provided at the interface between the barrier membrane and the bone-attached scaffold 2, and the drug-releasing layer is loaded with antibiotics (such as gentamicin or clindamycin) or growth factors (such as recombinant human platelet-derived growth factor-BB).

[0045] The implant disclosed in this embodiment is attached to the jawbone 1 via a bone fitting framework 2. An abutment 4 is provided for connection and repair. An anti-exposure barrier structure 3 is provided at the abutment 4 and the bone fitting framework 2. After the periosteum and soft tissue are repositioned and covered, the implant can be sealed, preventing external microorganisms and impurities from entering the microenvironment between the implant and the periosteum and soft tissue and disrupting the balance of the microenvironment. This maintains the long-term stability and reliability of the implant and avoids causing discomfort to the human body.

[0046] As the subperiosteal implant disclosed in this embodiment, its fourth structure includes: A fixation structure is used to fix the bone fitting framework 2 to the jawbone.

[0047] The bone fitting framework 2 is connected and fitted to the jawbone 1. This fixed connection ensures the stability and reliability of the upper abutment 4 and the prosthesis. Specifically, the connection and fixation of the bone fitting framework 2 can be achieved in various ways. This embodiment optimizes and adopts one feasible option: the retention structure includes several threaded locking elements 6, which pass through the bone fitting framework 2 and fix it to the jawbone 1. When using the above scheme, multiple locking holes can be provided on the bone fitting framework 2, through which the threaded locking elements 6 are connected to the jawbone 1, maintaining the connection and fit between the bone fitting framework 2 and the jawbone 1.

[0048] Preferably, the threaded locking element 6 can be a retaining screw.

[0049] Preferably, in this embodiment, a countersunk hole is provided at the locking hole. After the retaining screw is placed in the locking hole, the head of the retaining screw enters the countersunk hole. This reduces the exposed part of the retaining screw head, which can avoid local stress concentration caused by pressure on the soft tissue and can also avoid the screw causing a cutting effect on the soft tissue.

[0050] Example 2 like Figure 2 As shown, this embodiment discloses a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. The difference from Embodiment 1 is that the locking structure between the abutment 4 and the bone fitting framework 2 is adjusted in this embodiment, reducing the number of retention screws on the bone fitting framework 2. This avoids adverse effects such as local stress concentration and cutting effect on the periosteum and soft tissue caused by the structure of the retention screws, thus avoiding discomfort and damage to the body.

[0051] Specifically, the different schemes adopted in this embodiment are as follows: When the threaded connector is installed on the bone fitting support 2, the tail of the threaded connector has a protruding part, which can easily cause local stress concentration and cutting effect on the periosteum and soft tissue, causing irritation and damage to the periosteum and soft tissue. Therefore, the setting structure of the threaded connector can be adjusted and its structure is not limited to one. This embodiment optimizes and adopts one feasible option: the base 4 is provided with a mating hole 404 for the threaded locking member 6 to pass through. The inner bottom of the mating hole 404 also forms a circumferential anti-rotation structure. The threaded locking member 6 forms a circumferential limiting structure 601 that corresponds to and cooperates with the circumferential anti-rotation structure and is used to maintain the stability of the base 4 in the circumferential direction.

[0052] In this embodiment, the threaded locking member 6 can be a screw, and is disposed in the mating hole 404. The threaded locking member 6 penetrates the bottom of the base 4 and the bone fitting support 2, directly inserting into the jawbone 1 for connection and fixation. This achieves the connection and fit of the bone fitting support 2 on the jawbone 1, and also achieves the fixation and fit of the base 4. This reduces the number of externally disposed threaded locking members 6 and avoids damage to the periosteum and soft tissue caused by threaded connectors remaining externally. The circumferential anti-rotation structure disposed in the mating hole 404 corresponds to the circumferential limiting structure 601 on the threaded locking member 6, which can maintain the stability of the base 4 in the circumferential direction and prevent circumferential loosening or even slippage and rotation. In some solutions, the circumferential anti-rotation structure and the circumferential limiting structure 601 can adopt a structure of corresponding limiting grooves and limiting blocks, such as using polygonal limiting grooves and polygonal limiting blocks, which can achieve synchronous fixation in the circumferential direction after mating.

[0053] Preferably, the screw hole edge can be provided with a countersunk groove of 0.2mm to 0.5mm, so that the screw head is embedded below the upper surface of the bracket, providing a flat mounting surface for the adhesion of the barrier layer.

[0054] Preferably, the threaded locking element 6 is made of medical-grade titanium alloy or stainless steel, and when a screw is used, the specific structure includes a screw body and a screw head.

[0055] The screw body consists of a threaded section and a smooth shank section. The threaded section, located at the bottom of the screw, is used to screw into bone tissue. It has either a self-tapping or non-self-tapping thread, with an outer diameter of 1.5 mm to 2.5 mm, a pitch of 0.5 mm to 1.0 mm, and a thread length of 4 mm to 10 mm. The smooth shank section connects the threaded section to the screw head and has a length of 2 mm to 6 mm.

[0056] The screw head features a polygonal locking structure, which can be a regular hexagon, octagon, or star-shaped countersunk hole with a depth of 1.0 mm to 2.5 mm and an inscribed circle diameter of 1.2 mm to 2.2 mm. The outer diameter of the screw head is larger than the thread outer diameter, ranging from 2.5 mm to 4.0 mm. The upper surface of the screw head may have a Phillips head or internal hexagonal drive structure for easy screwing in.

[0057] In this embodiment, the screw simultaneously fixes the bone fitting support 2 to the bone surface and provides an anchor point for the abutment 4—that is, the locking screw is both a fastener of the support and an anchor of the abutment 4, realizing a three-level linkage locking of the bone fitting support 2, the screw, and the abutment 4.

[0058] In this embodiment, the structure of base 4 has also been adjusted in other ways, as follows: The abutment 4 is made of titanium alloy, zirconia ceramic or PEEK (polyether ether ketone) and includes an upper fixation segment 401 and a lower transgingival segment 402.

[0059] The fixed section 401 is used to connect dentures or upper restorations. Its top is provided with an internal threaded hole or an external conical surface structure with thread specifications from M1.4 to M2.0.

[0060] The transgingival segment 402 is used to pass through the gingival tissue penetration area. Its bottom has one or more locking protrusions, the shape of which matches the polygonal countersunk hole shape of the locking screw head (such as a regular hexagon or octagonal prism), with a dimensional tolerance of 0.01 mm to 0.05 mm for the fit clearance. The abutment 4 is embedded in the polygonal countersunk hole of the locking screw head through the locking protrusions, achieving circumferential positioning and anti-rotation fixation of the abutment 4 and the screw.

[0061] The height of the locking protrusion is 1.0 mm to 2.5 mm, slightly less than the depth of the polygonal countersunk hole (shallower by 0.1 mm to 0.3 mm), leaving a gap between the bottom of the abutment 4 and the upper surface of the screw head to accommodate the sealing washer 5. The diameter of the transgingival section 402 of the abutment 4 is 3.0 mm to 5.5 mm, customized according to the gingival thickness, and the height through the gingiva is 2.0 mm to 6.0 mm.

[0062] Other component structures not mentioned in this embodiment adopt the scheme described in Embodiment 1, and will not be repeated here.

[0063] Example 3 This embodiment discloses a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. The difference between this embodiment and the schemes in Embodiments 1 and 2 is that the structure of the bone fusion scaffold has been adjusted to facilitate close fitting between the bone fusion scaffold and the jawbone.

[0064] Specifically, the different schemes adopted in this embodiment are as follows: like Figure 1 , Figure 2 and Figure 3 As shown in this embodiment, in order to further improve the structural stability of the bone fitting framework 2 on the jawbone 1, the structure of the bone fitting framework 2 is adjusted to fit more tightly onto the jawbone 1. The structure of the bone fitting framework 2 can be configured in various forms, and its structure is not limited to one specific form: several auxiliary retention structures are formed on the bone fitting framework 2 to maintain a stable fit between the bone fitting framework 2 and the jawbone 1. When the above scheme is adopted, the auxiliary retention structure includes auxiliary retention claws 201, which can fit and hold the jawbone 1 tightly, thereby improving the stability of the fit between the bone fitting framework 2 and the jawbone 1.

[0065] Preferably, two to four auxiliary retention claws 201 extend outward from the edge of the bone fitting framework 2, and are made of elastic material (titanium alloy or shape memory alloy). They can be integrally printed with the bone fitting framework 2 or connected by laser welding. The two to four auxiliary retention claws 201 are symmetrically or asymmetrically distributed along the periphery of the bone fitting framework 2, and the specific distribution scheme is determined according to the anatomical morphology and mechanical analysis of the jawbone 1.

[0066] Each auxiliary retention claw 201 has an arc-shaped or L-shaped curved structure, with its free end extending outward and upward toward the scaffold, and a bending angle of 30° to 90°. The width of the retention claw is 1.0 mm to 3.0 mm, the thickness is 0.5 mm to 2.5 mm, and the length is 5 mm to 15 mm. The auxiliary retention claw 201 is elastic and can be compressed during implantation to pass through the soft tissue channel. After implantation, it relies on elastic recovery force to lock into the subperiosteal tissue space, forming a mechanical interlock. The elastic modulus of the retention claw matches the subperiosteal tissue, and the designed stiffness ranges from 10 N / mm to 50 N / mm. The surface of the retention claw can be provided with microbarbs or roughened (Ra 1 μm to 5 μm) to enhance the anchoring force with the subperiosteal tissue. The auxiliary retention claw 201 provides additional initial stability in the early stage of bone healing, prevents scaffold micromovement, reduces reliance on the main retention screw, and provides redundant retention guarantee for reducing the number of screws.

[0067] Preferably, the auxiliary retaining claw 201 is made of shape memory alloy and elastically recovers a predetermined bending shape under body temperature conditions.

[0068] Other component structures not mentioned in this embodiment adopt the schemes described in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0069] Example 4 This embodiment discloses a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. The difference between this embodiment and the schemes in Embodiments 1 and 2 is that the structure of the abutment has been adjusted to further improve the anchoring effect with the periosteum and soft tissue after implantation and improve the sealing performance.

[0070] Specifically, the different schemes adopted in this embodiment are as follows: like Figure 1 and Figure 2 As shown, the transgingival portion of the abutment has several micropores, which are used to guide the ingrowth of gingival fibroblasts to form an anchoring structure and improve the overall sealing effect.

[0071] In this embodiment, the function of the micropores is similar to that of the micropores on the shielding film.

[0072] Other component structures not mentioned in this embodiment adopt the schemes described in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0073] Example 5 This embodiment discloses a subperiosteal implant with an anti-exposure barrier and optimized biomechanics. The difference between this embodiment and the schemes in Embodiments 1 and 2 is that the structure of the shielding membrane has been adjusted to further improve the anchoring effect on the periosteum and soft tissue after implantation and improve the sealing performance.

[0074] Specifically, the different schemes adopted in this embodiment are as follows: like Figure 3 , Figure 4 As shown, the bone fitting framework is provided with several abutments, each abutment being used to connect to a prosthesis. The shielding membrane provided on the bone fitting framework extends continuously along the direction of the abutment arrangement to form an overall coverage, thereby forming a continuous closed surface on the bone fitting framework.

[0075] Other component structures not mentioned in this embodiment adopt the schemes described in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0076] The above are the embodiments listed in this example; however, this example is not limited to the optional embodiments described above; those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments; anyone can derive other various forms of embodiments under the guidance of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example; the scope of protection of this example should be determined by the claims.

Claims

1. A subperiosteal implant with an exposure-protection barrier and optimized biomechanics, characterized in that, include: Bone fitting framework (2) is used to fit and fix the jawbone (1); The abutment (4) is placed on the bone veneer (2) and is used to pass through the gingival tissue and connect the prosthesis; An anti-exposure barrier structure (3) is set in the transition area connecting the bone fitting frame (2) and the abutment (4) and the transition area is sealed; The fixation structure is used to fix the bone fitting framework (2) to the jawbone.

2. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 1, characterized in that: The abutment (4) includes a transgingival segment (402) and a fixed segment (401). The transgingival segment (402) corresponds to and passes through the gingival tissue perforation area. The fixed segment (401) is located on the transgingival segment (402) and is used to connect the restoration.

3. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 2, characterized in that: The lower part of the transgingival segment (402) forms a connecting segment (403) that connects and cooperates with the bone fitting framework (2). The outer diameter of the connecting segment (403) is smaller than the outer diameter of the transgingival segment (402), and a stepped transition surface is formed at the connection between the connecting segment (403) and the transgingival segment (402).

4. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 3, characterized in that: The exposure protection barrier structure (3) includes a barrier membrane that extends from the stepped transition surface of the abutment (4) to the upper surface of the bone fitting scaffold (2), while the thickness of the barrier membrane gradually decreases.

5. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 4, characterized in that: The surface of the barrier membrane is covered with a number of micropores, which are used to guide gingival fibroblasts and connective tissue to grow in and form a closed anchor.

6. The subperiosteal implant with an exposure-protecting barrier and optimized biomechanics according to claim 4 or 5, characterized in that: The edge of the barrier membrane forms an arc-shaped rolled structure or an arc-shaped transition surface.

7. The subperiosteal implant with an exposure-protecting barrier and optimized biomechanics according to claim 4 or 5, characterized in that: The surface of the barrier membrane is formed with a protective coating and / or a slow-release layer.

8. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 1, characterized in that: The fixation structure includes several threaded locking elements (6), which pass through the bone fitting bracket (2) and fix it to the jawbone (1).

9. The subperiosteal implant with an anti-exposure barrier and optimized biomechanics according to claim 8, characterized in that: The base (4) is provided with a mating hole (404) through which the threaded locking member (6) passes. The inner bottom of the mating hole (404) is also formed with a circumferential anti-rotation structure. The threaded locking member (6) is provided with a circumferential limiting structure (601) that corresponds to the circumferential anti-rotation structure and is used to maintain the stability of the base (4) in the circumferential direction.

10. The subperiosteal implant with an exposure-protecting barrier and optimized biomechanics according to claim 8 or 9, characterized in that: Several auxiliary fixation structures are formed on the bone fitting framework (2) to maintain a stable fit between the bone fitting framework (2) and the jawbone (1).

Images