Implant system capable of treating peri-implantitis

Abstract

The invention discloses an implant system capable of treating peri-implantitis, and belongs to the field of dental restoration materials. Comprising an implant body, the upper section of the implant body is a neck area, and the neck area is provided with an external connecting structure matched with a neck ring; the implant body realizes complete osseointegration with an alveolar bone after being implanted, and a part exposed to a soft tissue interface does not exist; the replaceable neck ring accessory comprises a series of neck rings with different heights and smooth outer surfaces, and the replaceable neck ring accessory is used for being mounted in the neck area of the implant body when peri-implantitis occurs; the roughness of the outer surface is Raut; and 0.2 [mu] m. After the peri-implantitis occurs, the smooth neck ring is replaced or screwed in, the rough surface of the neck is quickly changed into a smooth surface, and an interface which is not beneficial to plaque adhesion is formed, so that the microenvironment around the implant is improved, auxiliary treatment and control of occurrence and development of the peri-implantitis are realized, the structure is adjustable, the use is flexible, and the operation is convenient.

Description

Technical Field

[0001] The present invention belongs to the field of dental restoration materials, and particularly relates to an implant system capable of treating peri-implantitis. Background Art

[0002] With the wide application of oral implant technology, the long-term stability of implants has become a key issue of clinical concern. As a chronic inflammatory disease caused by bacterial infection, peri-implantitis can lead to the destruction of the hard and soft tissues around the implant, and is one of the main reasons for implant failure. At present, the treatment methods of peri-implantitis mostly rely on traditional means such as debridement, anti-infection, and surgical intervention. However, the treatment process is complex, the patient compliance is low, and it is prone to recurrence. There is no therapeutic implant that can directly physically isolate or structurally repair it in terms of structure.

[0003] In the prior art, although there are various improvement schemes in terms of structure or material to attempt to solve the problem of peri-implantitis. For example: (1) Antibacterial coating implants, by coating antibacterial materials (such as chlorhexidine, silver ions, chitosan, etc.) on the surface of the implant to inhibit bacterial adhesion. However, such designs have problems such as poor coating stability and limited drug efficacy duration, and once inflammation occurs, the surface structure cannot be further adjusted. (2) Microporous or drug release structures, by designing drug sustained-release channels or structures (such as nanotubes, drug storage cavities, etc.) on the implant for long-term release of antibacterial drugs. However, such structural designs are complex, the manufacturing cost is high, and external drug supplementation is still required. (3) Replaceable abutments or upper structures, this design facilitates doctors to clean and disinfect the local area when peri-implantitis occurs through replaceable abutments or removable dentures. However, repeated disassembly and assembly may cause loosening of the abutment-implant interface, increasing micro-gaps; disassembly requires professional equipment and doctor operation, it is difficult for patients to maintain by themselves, and the operation is cumbersome, with high requirements for patient compliance; the surface state of the implant cannot be adjusted, and it is limited to the replacement of the upper restoration, and the surface morphology and microenvironment of the implant body cannot be changed. (4) Mechanical cleaning, this scheme uses a high-speed bur to grind, remove the rough surface and biofilm, and polish as much as possible to reduce bacterial adhesion. However, it is difficult to form a highly polished tissue contact surface, the operation technology sensitivity is too high, and the design strength of the implant neck is reduced.

[0004] In summary, once the existing implant structure is implanted, it has a fixed form and cannot be dynamically adjusted or structurally repaired according to the patient's inflammatory status; the antibacterial coating and drug release device have a short effective period. Once exhausted or shed, they cannot continue to function and cannot be reversibly or repeatedly used; the anti-inflammatory effect of the replaceable superstructure is limited and it is difficult to directly intervene in the pathological microenvironment between the implant neck and the epithelial tissue; traditional debridement and surface treatment methods rely on professional operations, have high technical sensitivity, reduce the structural strength of the implant neck, and cannot fundamentally change the surface state of the implant, making recurrence likely. Currently, there is a lack of a simple, minimally invasive, and highly operable structural regulation method for improving the neck surface characteristics of the implant in stages after implantation to meet different clinical needs (such as the treatment period and the maintenance period).

[0005] To effectively address this issue, there is an urgent need for a new implant product with treatment and control functions at the implant structure level, which can quickly adjust the treatment strategy after peri-implantitis occurs and can minimize the formation and adhesion of bacterial biofilms to improve the long-term success rate of implants. Summary of the Invention

[0006] In response to the above problems, the present invention provides an implant system for treating peri-implantitis. After peri-implantitis occurs, by replacing or screwing in a smooth collar, the neck surface can be quickly changed from rough to smooth, forming an interface that is not conducive to plaque adhesion, thereby improving the microenvironment around the implant and assisting in the treatment and control of the occurrence and development of peri-implantitis. The present invention adjusts the surface state of the neck of the implant body through a mechanical structure, and its structure is adjustable, flexible to use, and convenient to operate.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An implant system for treating peri-implantitis, comprising:

[0009] An implant body, the upper section of which is a neck region, and the neck is provided with an external connection structure that can match the collar; after the implant body is implanted, it achieves complete osseointegration with the alveolar bone and there is no part exposed to the soft tissue interface;

[0010] A replaceable collar attachment, which includes a series of collars with different heights and smooth outer surfaces for being installed on the neck region of the implant body when peri-implantitis occurs; the surface roughness Ra of the outer surface < 0.2 μm.

[0011] As a preference of the present invention, the connection between the neck region of the implant body and the collar adopts a threaded connection, a snap connection structure, or a sliding groove connection. Further preferably, it is a threaded connection, and the pitch of the external thread in the neck region is smaller than the pitch of the external thread in the body region.

[0012] Preferably in the present invention, the total height of the implant body is 11 - 13 mm, and the height of the neck region is 5 mm.

[0013] Preferably in the present invention, the pitch of the external thread in the neck region is 0.2 - 0.3 mm, and the pitch of the external thread in the body region is 0.5 - 1.0 mm.

[0014] Preferably in the present invention, the replaceable collar attachment includes a series of collars with heights of 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and greater than 3 mm, and the collar greater than 3 mm comes with a base for supporting the dental crown or prosthesis.

[0015] Preferably in the present invention, the selection of the collar height is adapted to the bone resorption height caused by peri - implantitis.

[0016] Preferably in the present invention, the collar is of a cylindrical structure, and the outer surface is mirror - polished titanium, zirconia ceramic, or polymer material, and is coated with antibacterial drugs or healing - promoting factors.

[0017] Preferably in the present invention, a stop structure and a porous driving groove are provided at the top of the collar, and the porous driving groove matches an external installation tool to achieve the installation of the collar.

[0018] Most existing implant systems are mostly fixed in structure. Once peri - implantitis occurs, there is a lack of a "response mechanism" in structure. Even through means such as debridement, scaling, or laser treatment, it is impossible to achieve regenerative regulation or functional isolation of the implant neck surface, and the structural strength of the implant neck is reduced. Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) Achieved "reversible regulation" of the implant neck surface state: Compared with existing fixed - structure implants or surface - non - adjustable devices, the present invention can make the implant surface exposed to the oral environment due to bone resorption caused by peri - implantitis change from a rough thread to a smooth structure by installing / dismantling the collar, effectively inhibiting plaque adhesion, facilitating epithelial sealing, and thus assisting in the treatment or prevention of peri - implantitis.

[0020] (2) The replacement of the collar does not require the removal of the implant or the upper restoration, and only simple connection / dismantling (such as screwing) operations are required to complete, with simple operation; it does not rely on external intervention means such as lasers, drugs, or surgeries, improving the treatment efficiency and reducing trauma.

[0021] (3) Collars with different heights and smooth outer surfaces can be selected according to individual patient differences to be suitable for different implant sites (anterior teeth / posterior teeth), different soft tissue thicknesses, and different inflammatory stages.

[0022] (4) The implant system provided by the present invention is an adjustable therapeutic implant, which can be used for the treatment and control during the inflammatory period and also during the recovery period to prevent recurrence; it has obvious functional extensibility and is suitable for multi-stage clinical management. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of an implant body in an embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of a single collar structure in an embodiment of the present invention;

[0025] Figure 3 It is a modeling effect diagram of the single collar structure;

[0026] Figure 4 It is a schematic structural diagram of a collar structure with a built-in abutment in an embodiment of the present invention;

[0027] Figure 5 It is a modeling effect diagram of the collar structure with a built-in abutment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] The present invention provides an implant system for treating peri-implantitis, including:

[0030] An implant body, the upper section of which is a neck region, and the neck is provided with an external connection structure that can be matched with a collar; after the implant body is implanted, it achieves complete osseointegration with the alveolar bone, and there is no part exposed to the soft tissue interface. It should be emphasized that different from the neck of traditional implants, the neck region of this implant body is used for connecting structural accessories rather than being permanently exposed to the soft tissue interface. When peri-implantitis does not occur, the neck region is completely buried in the alveolar bone to achieve complete osseointegration. Only when peri-implantitis causes bone resorption, the neck region will be exposed.

[0031] A replaceable collar attachment, which includes a series of collars with different heights and a smooth outer surface (the surface roughness Ra of the outer surface < 0.2 μm), and is used to be installed on the neck region of the implant body when peri-implantitis occurs, quickly changing the neck surface from rough to smooth, forming an interface that is not conducive to plaque adhesion, thereby improving the microenvironment around the implant and assisting in the treatment and control of the occurrence and development of peri-implantitis.

[0032] In this embodiment, a threaded connection, a snap - fit connection structure, or a sliding - groove connection is adopted between the neck region of the implant body and the collar.

[0033] To adapt to different oral anatomical regions and clinical requirements, the collar consists of a series of multi - specification structures, where the heights are: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, >3mm (with a built - in abutment), and its diameter has an adjustment range of ±0.1mm corresponding to the diameter of the implant platform. The present invention can be adapted to different collars only through the standardized design of the connection structure (such as threads), which is beneficial to standardized production and inventory management.

[0034] The materials of the implant body and the collar are medical pure titanium or Ti - 6Al - 4V alloy, zirconia ceramics, high - molecular materials such as PEEK, or the above - mentioned materials combined with an antibacterial coating. Among them, medical pure titanium or Ti - 6Al - 4V alloy needs to be polished. Zirconia ceramics have excellent biocompatibility, and high - molecular materials such as PEEK have the advantages of low hardness and no metal reaction.

[0035] Example 1

[0036] A threaded implant system, the implant body of which is as Figure 1 shown, and a collar matching the implant body is as Figures 2 - 3 . The collar is an internally - threaded cylindrical annular structure, and the height of the collar can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm. The selection of the collar height is adapted to the bone resorption height caused by peri - implantitis. The collar can be screwed and fixed at the external thread of the implant neck.

[0037] A threaded connection is adopted between the neck region of the implant body and the collar, and the pitch of the external thread in the neck region is smaller than that in the body region. The total height of the implant body is 11 - 13mm, and the height of the neck region is 5mm, and the height of the implant body is 6 - 8mm. Different heights of the implant body can be designed to adapt to different patients, and it is required that the implant body achieve complete osseointegration with the alveolar bone after implantation. The pitch of the external thread in the neck region is 0.2 - 0.3mm, and the pitch of the external thread in the body region is 0.5 - 1.0mm.

[0038] The collar is a cylindrical structure, the outer surface of which is mirror - polished titanium, zirconia ceramics or high - molecular materials, and is coated with antibacterial drugs (such as silver, chlorhexidine, chitosan) or healing - promoting factors. The surface of the collar of the present invention presents a micro - level low roughness (Ra < 0.2μm) to form an antibacterial and anti - adhesion epithelial contact interface. The collar can be disassembled and assembled at any stage after the implant is implanted for different treatment purposes, including protection in the acute phase, closure in the chronic phase, and prevention of recurrence in the maintenance phase.

[0039] The top of the collar is provided with a stop structure and a porous drive groove. The stop structure is used to prevent rotational loosening and screwing limit. When installing, it needs to be screwed to the stop structure. The porous drive groove matches the external installation tool to achieve the installation of the collar. The porous drive groove in this embodiment is a three-hole structure, which can be matched with a three-pin tool to achieve the installation of the collar. During installation, the implant is implanted and bone integration is completed. If periarthritis is found in the neck of the implant, the collar can be screwed and installed in the exposed area of ​​the neck of the implant without removing the implant; the smooth surface of the collar helps to reduce plaque adhesion, stimulate epithelial attachment reconstruction, reduce the risk of inflammation, and can be removed or retained after the treatment.

[0040] Example 2

[0041] A threaded implant system, wherein the implant body is as follows Figure 1 As shown, one of the collars matches the implant body. Figures 4 - 5 The height of the collar is 3.5mm, and the collar comes with a base for supporting the crown or restoration. The bottom part to be threaded is the collar, and the top is the base.

[0042] The rest is the same as in Example 1.

[0043] Example 3

[0044] In order to facilitate the quick installation between the implant body and the collar, in addition to the above-mentioned threaded connection method, any of the following connection methods can be used instead of the threaded connection:

[0045] Snap-on connection structure: A micro-slot structure is designed on the outside of the implant neck, and the collar is embedded and fixed through an elastic snap-on.

[0046] Slideway insertion structure: A slideway structure is provided on the outside of the implant, and the collar slides in through the slideway and is locked.

[0047] Example 4

[0048] The upper part (neck) of the implant provided by the present invention reserves a threaded interface. After peri-implantitis occurs, the rough threaded structure originally exposed to the oral environment can be effectively sealed by installing a smooth, threadless collar, thereby reducing bacterial hiding and attachment, increasing the difficulty of local cleaning, improving soft tissue healing, and having a good therapeutic auxiliary effect.

[0049] The structure of the present invention can be implemented in different treatment stages:

[0050] Stage of peri-implantitis: When bone absorption is less than 3 mm, a single collar structure is used; when absorption is greater than 3 mm, a collar structure with its own base is used.

[0051] Early inflammation control stage: quickly block plaque reattachment.

[0052] Chronic maintenance stage: The smooth interface is retained for a long time to stabilize the soft tissue seal.

[0053] During normal repair, the neck of the implant has a conventional thread structure, which can form a stable interface with the bone; if the patient shows signs of peri-implantitis, a smooth collar can be simply installed on the exposed thread surface through a simple installation operation; the neck exposed to the oral environment after installation is a smooth surface with low attachment, easy to clean, and friendly to epithelium, which helps to control inflammation and inhibit bacterial adhesion; after the curative effect is stable, the collar can be removed according to needs to restore the original repair structure. The present invention can effectively control peri-implantitis, reduce the risk of implant shedding, and improve the long-term success rate. This technical solution has the advantages of minimally invasive, repeatable operation, good biocompatibility and adaptability, filling the blank in the structural design of current treatment implants. The design has a simple structure, convenient operation and high repeatability, and can be popularized and applied as a structural treatment means for peri-implantitis.

[0054] Compared with repeated treatment means such as drug treatment, surgical debridement, and laser anti-inflammatory treatment, the present invention can achieve the "reusable" treatment function by replacing the structure, reducing the subsequent treatment cost of patients and the operation cost of doctors.

[0055] The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art. Although the embodiments of the present invention are described with reference to the drawings, various modifications or changes can be made by those of ordinary skill in the art within the scope of the appended claims.

Claims

1. An implant system for treating peri-implantitis, characterized in that, include: The implant body has a neck region at its upper part, and the neck is provided with an external connection structure that can match the neck ring; the implant body is completely bone-integrated with the alveolar bone after implantation, and there is no part exposed to the soft tissue interface; The replaceable collar accessory includes a series of collars with different heights and smooth outer surfaces, which are used to be installed in the neck area of ​​the implant body when peri-implantitis occurs; the outer surface roughness Ra is <0.2μm.

2. The implant system for treating peri-implantitis according to claim 1, wherein, The neck area of ​​the implant body and the collar are connected by a threaded connection, a snap-on connection structure or a sliding groove.

3. The implant system for treating peri-implantitis according to claim 2, characterized in that, The neck region of the implant body is connected to the collar by a thread, and the pitch of the external thread of the neck region is smaller than the pitch of the external thread of the body region.

4. The implant system for treating peri-implantitis according to claim 2, characterized in that, The total height of the implant body is 11-13 mm, and the height of the neck area is 5 mm.

5. The implant system for treating peri-implantitis according to claim 2, characterized in that, The pitch of the external thread in the neck area is 0.2-0.3 mm, and the pitch of the external thread in the body area is 0.5-1.0 mm.

6. The implant system for treating peri-implantitis according to claim 1, characterized in that, The replaceable collar accessories include a series of collars with heights of 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm and greater than 3 mm, and the collars greater than 3 mm come with a base for supporting a crown or a restoration.

7. The implant system for treating peri-implantitis according to claim 6, characterized in that, The collar height is chosen to match the degree of bone resorption caused by peri-implantitis.

8. The implant system for treating peri-implantitis according to claim 1, characterized in that, The collar is a cylindrical structure, the outer surface of which is made of mirror-polished titanium, zirconium oxide ceramics or polymer material, and is coated with antibacterial drugs or healing-promoting factors.

9. The implant system for treating peri-implantitis according to claim 1, characterized in that, A stop structure and a multi-hole driving groove are provided on the top of the collar, and the multi-hole driving groove matches an external installation tool to realize the installation of the collar.

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