Dental implant
By designing the roots of dental implants with different bone resorption and osteogenesis speeds in multiple areas, the problem of degradation of the initial stability of dental implants is solved, and the relay type maintains stability and improves the success rate of implants is achieved.
Patent Information
- Application Number
- CN202411997218.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-01
AI Technical Summary
There are fragile periods in the interval where dental implants have decreased initial stability, which affects the stability of the implant and bone.
A dental implant is designed with the root part of at least two areas, with different bone resorption speeds and/or osteogenesis speeds. Through gradient settings or porous structure regulation, different areas are ensured to adapt to the surrounding bone resorption speeds and the formation speeds of new bone.
By regulating bone resorption and osteogenesis speed, the relay type maintains the stability of the implant, enhances the binding force between the implant and the bone, and improves the success rate and treatment effect of the implant.
Smart Images
Figure CN119732764A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of dental implants, and in particular to a dental implant. Background Art
[0002] Implants with good bone integration and stability can help improve the success rate of implantation and shorten the treatment cycle. Implant stability mainly includes two parts: primary stability and secondary stability. Figure 1 As shown in the figure, the initial stability is generated by the surrounding bone that the implant contacts, and the secondary stability is obtained by the bone fusion of the new bone tissue formed after the implant is placed. Among them, the principle and characteristics of implant stability determine the interval in which the implant stability will inevitably decrease, so there is a period when the implant is particularly vulnerable to external loads.
[0003] The period of implant stability decline varies depending on the implant's structural design or surface treatment, but as a common phenomenon for all dental implants, the aforementioned fragile period has a great impact on the initial stability of the implant. Therefore, in order to enhance the stability of the implant-bone, it is necessary to modify the implant structure.
[0004] It should be noted that the information disclosed in the background technology section of this disclosure is only intended to increase the understanding of the overall background of this disclosure, and should not be regarded as an admission or any form of suggestion that the information constitutes prior art already known to those skilled in the art. The above statements are only used to provide background technology information related to this application, and do not necessarily constitute prior art. Summary of the invention
[0005] The disclosed embodiment provides a dental implant, which is beneficial to improving the stability of the implant.
[0006] According to one aspect of the present disclosure, there is provided a dental implant, comprising:
[0007] Neck; and
[0008] The root portion is connected to the neck portion, and the root portion includes at least two regions, and the bone absorption rate and / or bone formation rate of the at least two regions are different.
[0009] In some embodiments, the bone resorption rate and / or bone formation rate of at least two regions are set to be gradually varied according to the absorption rate of surrounding bones and the formation rate of new bones.
[0010] In some embodiments, a plurality of through holes are respectively disposed in at least two regions, and the total flow areas of the at least two regions are different.
[0011] In some embodiments, multiple through holes are respectively provided in at least two regions, and the porosity of at least two regions is different; and / or, multiple through holes are respectively provided in at least two regions, and the apertures of the through holes in at least two regions are different.
[0012] In some embodiments, at least two regions have different surface treatment methods or treatment degrees; and / or at least two regions are made of different materials.
[0013] In some embodiments, at least two regions are respectively provided with a plurality of through holes, and in the at least two regions, the arrangement of the through holes satisfies the following function:
[0014]
[0015] Among them, x, y, z are the coordinates of the point, t is the parameter that controls the aperture size of the through hole, and c is the parameter that controls the porosity in the area.
[0016] In some embodiments, at least two regions are respectively provided with a plurality of through holes. After the arrangement of the through holes in two regions is determined, the through holes in the remaining regions are gradually formed according to the following formula:
[0017]
[0018]
[0019] in, are the functions satisfied by the through holes in two adjacent areas, α(x, y, z) is the function that controls the gradient layer, k is the parameter that controls the gradient speed, and G(x, y, z) is the function that controls the gradient shape.
[0020] In some embodiments, the elastic modulus of the root is approximately equal to the elastic modulus of bone tissue adjacent to the root.
[0021] In some embodiments, a plurality of through holes are respectively disposed in at least two regions, and at least one through hole among the plurality of through holes extends to the outer surface of the root portion.
[0022] In some embodiments, the outer surface of the root includes a knife-edge-like bevel.
[0023] In some embodiments, the neck and the base are detachably connected.
[0024] In some embodiments, the dental implant further comprises a screw, and the neck and the root are connected by the screw.
[0025] In some embodiments, the neck and the root are both provided with a cone portion that cooperates with the screw, and the taper of the cone portion is 1:20.
[0026] In some embodiments, a protrusion is provided at one end of the neck close to the root, and a groove is provided at one end of the root close to the neck, and the protrusion is inserted into the groove.
[0027] In some embodiments, the screw extends from an end of the neck away from the root portion through the boss and to the root portion.
[0028] In some embodiments, the outer circumference of both the neck and the root are threaded.
[0029] In some embodiments, an end of the root away from the neck is provided with a self-tapping groove.
[0030] In some embodiments, the length of the root is 1.5 to 2.5 times the length of the neck.
[0031] In some embodiments, the root portion includes a first portion close to the neck and a second portion away from the neck, the second portion is provided with a plurality of through holes, and the through holes are filled with human body absorbable material.
[0032] In some embodiments, the body absorbable material includes polylactic acid, polyglycolic acid, or polycaprolactone.
[0033] In some embodiments, the neck is a solid structure or a porous structure.
[0034] Based on the above technical solution, the bone absorption rate and / or bone formation rate of at least two areas of the root in the present disclosure are different. This setting can make different areas have different bone absorption rates and / or new bone formation rates, provide support for regulating the surrounding bone absorption and new bone formation rates, and is conducive to achieving the effect of relay-type maintenance of implant stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:
[0036] Figure 1 Schematic diagram showing how the stability of new and old bones changes over time.
[0037] Figure 2 Cross-sectional views of some embodiments of dental implants provided by the present disclosure.
[0038] Figure 3 Schematic diagrams of the structures of some embodiments of the dental implants provided by the present disclosure.
[0039] Figure 4 Schematic diagrams of the structures of three porous structures in some embodiments of the dental implant provided by the present disclosure.
[0040] Figure 5Schematic diagram of the gradual change of the porous structure in some embodiments of the dental implant provided by the present disclosure.
[0041] Figure 6 A gradually changing cross-sectional view of a porous structure in some embodiments of a dental implant provided by the present disclosure.
[0042] Figure 7 Schematic diagram of the structure of the inclined surface in some embodiments of the dental implant provided by the present disclosure.
[0043] In the figure:
[0044] 1. Neck; 2. Root; 21. Bevel; 3. Screw; 4. Thread; 5. Self-tapping groove. DETAILED DESCRIPTION
[0045] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0046] In the description of the present disclosure, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present disclosure.
[0047] like Figure 2 and Figure 3 As shown, in some embodiments of the dental implant provided by the present disclosure, the dental implant includes a neck 1 and a root 2, the root 2 is connected to the neck 1, and the root 2 includes at least two regions, and the bone absorption rate and / or bone formation rate of the at least two regions are different.
[0048] In the disclosed embodiment, the dental implant includes a neck 1 and a root 2, and the bone absorption rate and / or bone formation rate of at least two areas of the root 2 are different. This setting can enable different areas to have different bone absorption rates and / or new bone formation rates, provide support for regulating the surrounding bone absorption and new bone formation rates, and help achieve the effect of relay-type maintenance of the stability of the implant.
[0049] In some embodiments, the bone resorption rate and / or bone formation rate of at least two regions are set to be gradually varied according to the absorption rate of surrounding bones and the formation rate of new bones.
[0050] Setting the bone absorption rate and / or bone formation rate of at least two regions to gradually change according to the absorption rate of surrounding bones and the formation rate of new bones can make at least two regions adapt to the absorption rate of surrounding bones and the formation rate of new bones, which is beneficial to maintaining constant implant stability.
[0051] In some embodiments, the neck 1 is a solid structure.
[0052] Setting the neck 1 as a solid structure can provide initial stability and mechanical support to prevent early loosening; moreover, as the part in contact with the gums, setting the neck 1 as a solid structure can effectively reduce the risk of infection.
[0053] In other embodiments, the neck 1 is a porous structure.
[0054] Setting the neck 1 to a porous structure can increase permeability, provide more abundant blood supply, and promote healing.
[0055] In some embodiments, the root portion 2 is a porous structure.
[0056] By setting the root 2 as a porous structure, the elastic modulus of the implant can be reduced, thereby better matching the mechanical properties of the bone tissue, allowing the surrounding bone tissue to withstand stress within the normal range, avoiding the stress shielding phenomenon of bone absorption due to long-term exposure to lower stress, and obtaining long-term stability; the porous structure can also increase the attachment area and space of the bone surface, and through the growth of bone tissue and angiogenesis, the implant and bone tissue can form a more stable combination, thereby improving overall stability.
[0057] In some embodiments, a plurality of through holes are respectively disposed in at least two regions, and the total flow areas of the at least two regions are different.
[0058] By setting the total flow areas of at least two regions to be different, the absorption rates of the surrounding bones and the formation rates of new bones in the at least two regions can be different, which is beneficial to maintaining the stability of the implant constant.
[0059] The total flow area of each region can be adjusted by adjusting the porosity, the number of through holes, the pore size of the through holes, or the shape of the through holes.
[0060] In some embodiments, multiple through holes are respectively provided in at least two regions, and the porosity of at least two regions is different; and / or, multiple through holes are respectively provided in at least two regions, and the apertures of the through holes in at least two regions are different.
[0061] If the porosity in the area is high and the aperture of the through hole is large, the area will have higher permeability and surface area, allowing blood and nutrients to penetrate into the implant more easily to support new bone formation and tissue regeneration, which helps the implant to quickly integrate with the surrounding bone tissue in the early stage and improve the stability of the neck. At the same time, the surface with higher porosity and larger aperture is rougher, and the mechanical stability of the implant is stronger in the early stage of implantation, which is conducive to avoiding the stability valley effect.
[0062] If the porosity in the area is low and the through-holes are small, the area will have higher mechanical strength and rigidity, which will help to withstand chewing and other mechanical loads, prevent the implant from deforming or breaking during use, and also reduce the micro-movement between the implant and the surrounding bone tissue. Excessive micro-movement will hinder new bone formation and implant integration, increasing the risk of implant loosening.
[0063] The root 2 in the disclosed embodiment adopts a non-uniform porous structure, and porous structures with different porosities and pore sizes are selected in different regions. In addition to being beneficial to local biological and mechanical properties, it also adjusts the overall stress distribution of the implant, thereby alleviating stress concentration and adverse failure modes, and avoiding bone absorption or implant failure problems caused by stress concentration.
[0064] In some embodiments, the porosity of at least two regions is 40% to 70%, such as 40%, 50%, 60% or 70%.
[0065] In some embodiments, the diameter of the through holes in at least two regions is 150 μm to 400 μm, for example, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm and 400 μm.
[0066] In some embodiments, at least two regions are respectively provided with a plurality of through holes, and in the at least two regions, the arrangement of the through holes satisfies the following function:
[0067]
[0068] Among them, x, y, z are the coordinates of the point, t is the parameter that controls the aperture size of the through hole, and c is the parameter that controls the porosity in the area.
[0069] like Figure 4 As shown, the porous structure of the root 2 can be selected from the Gyroid type (such as Triply Periodic Minimal Surface, a three-dimensional curved surface structure with periodic repeating units, widely present in nature, such as protein shells, cytoskeleton, etc.) of the TPMS type. Figure 4 (a)), Diamond type (as shown Figure 4 (b)), Primitive type (such as Figure 4 (c) etc. The TPMS porous structure has excellent permeability and stress conduction, and the changes of the porous structure can be easily controlled.
[0070] Taking the Gyroid type as an example, the specific implicit function is:
[0071]
[0072] Among them, x, y, z are the coordinates of the TPMS point, t is the parameter controlling the unit cell size, and c is the parameter controlling the porosity.
[0073] According to the specific requirements of different areas, different t and c parameter values can be selected to match the corresponding pore size and porosity.
[0074] In some embodiments, at least two regions are respectively provided with a plurality of through holes. After the arrangement of the through holes in two regions is determined, the through holes in the remaining regions are gradually formed according to the following formula:
[0075]
[0076]
[0077] in, are the functions satisfied by the through holes in two adjacent areas, α(x, y, z) is the function that controls the gradient layer, k is the parameter that controls the gradient speed, and G(x, y, z) is the function that controls the gradient shape.
[0078] like Figure 5 and Figure 6 As shown, the changes in pore size and porosity between the two regions can be seen. After determining the peripheral TPMS porous structure, the following formula can be used to gradually change with the adjacent porous structure:
[0079]
[0080]
[0081] in, They are two adjacent parts of the TPMS implicit function, α(x, y, z) is the S-type function that controls the gradient layer, k is the parameter that controls the gradient speed, and G(x, y, z) is the function that controls the gradient shape. For different t and c parameters For Gyriod-type TPMS with different porosity and unit cell size, appropriate G(x, y, z) and k are selected to obtain a relatively smooth gradient layer morphology. Substitute The corresponding TPMS can be generated in.
[0082] In some embodiments, the elastic modulus of the root 2 is substantially equal to the elastic modulus of the bone tissue adjacent to the root 2 .
[0083] The elastic modulus of the commonly used titanium implants (103-110 GPa) is much higher than that of the surrounding bone tissue (cortical bone is 12.6-21.0 GPa, cancellous bone is 0.5-3.5 GPa), which easily produces stress shielding phenomenon at the bone tissue interface, causing the titanium with a larger elastic modulus in the system to obtain greater stress, while the bone tissue with a smaller elastic modulus may undergo bone absorption due to lack of sufficient stress stimulation, which in turn leads to implant loosening and falling off.
[0084] The root 2 in the embodiment of the present disclosure adopts a porous structure. By setting the elastic modulus of the root 2 to be approximately equal to the elastic modulus of the bone tissue adjacent to the root 2, sufficient initial stability can be provided, the absorption of the surrounding bone tissue and the loosening of the implant can be slowed down, and the long-term stability of the implant can be improved.
[0085] In some embodiments, a plurality of through holes are respectively disposed in at least two regions, and at least one through hole among the plurality of through holes extends to the outer surface of the root 2 .
[0086] By extending at least one through hole among the plurality of through holes to the outer surface of the root 2, the outer surface of the root 2 can have a certain degree of roughness, thereby enhancing the mechanical fit between the implant and the surrounding tissue and improving the stability of the implant.
[0087] like Figure 7 As shown, in some embodiments, the outer surface of the root 2 includes a knife-like bevel 21 .
[0088] By further modifying the porous outer surface of the root 2 into a blade-like bevel 21, it is beneficial to cut part of the cancellous bone into the porous structure when the implant is screwed into the bone, thereby accelerating the bone formation rate, and also helping to obtain greater mechanical stability and maintain initial stability.
[0089] In some embodiments, the neck portion 1 and the root portion 2 are detachably connected.
[0090] By configuring the neck 1 and the root 2 to be detachably connected, when bacterial infection or peri-implantitis occurs, the neck 1 at the top can be easily removed for cleaning and disinfection without removing the root 2. This allows the implant to be conveniently treated locally when bacterial infection occurs, greatly reducing the patient's pain and surgical risks.
[0091] In some embodiments, the dental implant further comprises a screw 3 , and the neck 1 and the root 2 are connected by the screw 3 .
[0092] By providing the screw 3 and connecting the neck 1 and the root 2 via the screw 3 , both the detachable connection between the neck 1 and the root 2 can be achieved and the connection reliability between the neck 1 and the root 2 can be improved.
[0093] In some embodiments, both the neck 1 and the root 2 are provided with a cone portion that cooperates with the screw 3 , and the taper of the cone portion is 1:20.
[0094] By setting the taper of the cone that cooperates with the screw 3 to achieve threaded connection to 1:20, it is beneficial to improve the connection reliability between the neck 1 and the root 2, and effectively prevent the screw 3 from falling off.
[0095] The screw 3 may adopt an ISO standard fine pitch thread.
[0096] The taper of the cone is set to 1:20, which meets the standard of Mohs taper, and can achieve a self-locking connection, providing high sealing and initial stability between the neck 1 and the root 2. At the same time, the screw 3 further enhances the fixing effect, ensures the mechanical strength and durability of the connection, effectively disperses stress and prevents bacterial isolation.
[0097] In some embodiments, a protrusion is provided at one end of the neck 1 close to the root 2, and a groove is provided at one end of the root 2 close to the neck 1, and the protrusion is inserted into the groove.
[0098] By providing the protrusion and the groove, the neck 1 and the root 2 can be preliminarily connected through the cooperation of the protrusion and the groove, which is convenient for the subsequent connection of the screw 3 and improves the convenience of connection.
[0099] In some embodiments, the screw 3 passes through the protrusion from the end of the neck 1 away from the root 2 and extends to the root 2. This arrangement can extend the length of the screw 3 as much as possible and improve the connection reliability between the neck 1 and the root 2.
[0100] In some embodiments, threads 4 are provided on the outer circumferences of the neck 1 and the root 2 .
[0101] By providing threads 4 on the periphery of the neck 1 and the root 2, a stronger mechanical fit can be provided for the implant to be combined with the bone cortex, thereby improving the initial stability of the implant.
[0102] In some embodiments, a self-tapping groove 5 is provided at one end of the root portion 2 away from the neck 1 .
[0103] By providing a self-tapping groove 5 at the end of the root 2 away from the neck 1, the connection reliability between the root 2 and the surrounding tissue can be effectively improved, and the root 2 can be prevented from falling off.
[0104] In some embodiments, the length of the root portion 2 is 1.5 to 2.5 times the length of the neck portion 1 . For example, 1.5 times, 2 times, and 2.5 times. The length of the root portion 2 is greater than the length of the neck portion 1 .
[0105] In some embodiments, the root portion 2 includes a first portion close to the neck 1 and a second portion away from the neck 1 , and the second portion is provided with a plurality of through holes, and the through holes are filled with human body absorbable material.
[0106] By filling the through hole of the second part away from the neck 1 with a human body absorbable material, the osteogenesis efficiency can be delayed, the stability trough can be postponed, a large difference in the osteogenesis speed can be avoided, and relay osteogenesis can be formed.
[0107] In some embodiments, the body absorbable material includes polylactic acid (also known as polylactide), polyglycolic acid (also known as polyglycolide), or polycaprolactone.
[0108] In some embodiments, at least two regions have different surface treatment methods or treatment degrees; and / or at least two regions are made of different materials.
[0109] The surface treatment methods of the area include sandblasting, hydrophilic treatment or surface coating, etc. Among them, different treatment degrees of sandblasting can include different amounts of sandblasting, different sandblasting times or different sandblasting areas, etc. Different treatment degrees of hydrophilic treatment can include different treatment times or different hydrophilic materials, etc. Different treatment degrees of surface coating can include different coating amounts or different coating materials, etc.
[0110] When through holes are provided in the region, the bone absorption rate and bone formation rate of the region can be adjusted by filling the through holes with different degradable materials or different drugs affecting bone formation.
[0111] In some embodiments, the outer surface of the implant is sandblasted or hydrophilized. Alternatively, an osteoclast activity inhibitor is applied to the outer surface of the implant.
[0112] Sandblasting the outer surface of the implant can increase the surface roughness of the implant and improve the mechanical locking force between the implant and the bone.
[0113] The outer surface of the implant is hydrophilized, and the SLA surface is treated with hydroxylation and highly hydrophilic SLActive surface treatment, which can enable the implant to quickly attract blood protein coagulation and bone formation after implantation, promote the initial healing response, etc. The surface of the dental implant that has been hydrophilized can form an osteoclast activity inhibitor coating to inhibit alveolar bone resorption, thereby enhancing the initial stability of the implant and the bonding strength of the implant-bone interface.
[0114] The osteoclast activity inhibitor (1st to 3rd generation bisphosphonate compounds of the PCP group) may include one or more selected from the group consisting of the following substances: alendronate, zoledronate, and the salts or esters thereof that are pharmaceutically permitted for use.
[0115] In some embodiments, the outer surface of the root is coated with a coating or alloy containing antibacterial elements (such as silver or copper) to further enhance the antibacterial effect.
[0116] The structure of an embodiment of the dental implant provided by the present disclosure is described below:
[0117] like Figure 2 and Figure 3 As shown, in order to achieve relay osteogenesis during implantation and provide continuous mechanical stability, different parts of the implant are designed differently.
[0118] The implant comprises a neck 1 and a root 2, wherein the upper one-third of the implant is the neck 1 without a porous structure, and the middle / lower two-thirds of the implant is the root 2 with a porous structure.
[0119] The neck 1 is a solid structure, which can provide initial stability and mechanical support to prevent early loosening.
[0120] The root 2 is a porous structure, which includes multiple different regions. Different regions are designed to have porous structures with different porosities and pore sizes, which can effectively regulate the speed of bone absorption and bone formation, and relay the stability of the implant within an acceptable range.
[0121] The neck 1 is the part of the implant that contacts the gums and is of a solid structure, which can effectively reduce the risk of infection. The periphery of the neck 1 and the root 2 are both provided with threads 4, which combine with the bone cortex to provide a strong mechanical fit.
[0122] The non-threaded part of the implant is Booleaned with the porous structure, and its periphery has a more aggressive full thread, which can further improve the initial stability.
[0123] The implant adopts a self-tapping structure, and the porous surface is further modified into a blade-like bevel, which is beneficial for cutting part of the cancellous bone into the porous structure when the implant is screwed into the bone, accelerating the bone formation rate, and also helping to obtain greater mechanical stability and maintain initial stability.
[0124] The neck 1 and the root 2 are detachably connected by a screw 3. When bacterial infection or peri-implantitis occurs, the neck 1 can be easily disassembled for cleaning and disinfection.
[0125] The surface of the implant is sandblasted to increase the surface roughness of the implant and improve the mechanical locking force between the implant and the bone. The surface of the implant is also hydrophilized, which can quickly attract blood protein coagulation and bone formation after the implant is implanted, promoting the initial healing response, etc.
[0126] The through hole of the root 2 can also be selectively filled with polymer materials that can be absorbed by the human body to delay the efficiency of osteogenesis and postpone the stability trough, thereby causing differences and forming relay osteogenesis.
[0127] The implant provided in the embodiment of the present disclosure adopts a partitioned design, and each part of the implant can regulate the speed of surrounding bone absorption or new bone formation, and relay the stability of the implant in the weak stability area of new bone formation. The partitioned porous structure design not only significantly improves the initial and secondary stability of the implant, ensuring sufficient stability in the weak stability area of new bone formation, but also reduces the stress shielding effect through the optimization of the elastic modulus, and promotes the healthy growth of bone tissue.
[0128] The implant provided in the embodiment of the present disclosure adopts a detachable structure, which is easy to clean after bacterial infection.
[0129] The outer surface of the implant provided in the embodiment of the present disclosure adopts a porous structure design, which can effectively increase the mechanical fit between the implant and the surrounding tissue.
[0130] The implant provided in the embodiment of the present disclosure optimizes the pore size and porosity design, and the porous structure can match the elastic modulus of bone tissue, reduce stress shielding, make it easier for osteoblasts to grow into the implant, and promote the healthy growth and integration of bone tissue.
[0131] The internal porous structure design of the implant provided in the embodiments of the present disclosure, as well as the external coating and surface modification treatment, can effectively enhance the antibacterial effect of the implant, effectively prevent infection, improve the overall biocompatibility and mechanical properties of the implant, and significantly improve the implant success rate and treatment effect.
[0132] The implant provided by the embodiment of the present disclosure adopts a structure combining a Morse taper and a screw, which can provide excellent mechanical locking and fixing effects. The self-locking function of the Morse taper and the further tightening of the screw ensure the stability of the connection and effectively prevent the implant from loosening in the early stage.
[0133] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.
[0134] Those skilled in the art will appreciate that, in the above method of a specific embodiment, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.
[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that without departing from the principles of the present disclosure, the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, and these modifications and equivalent replacements should be included in the scope of the technical solution for protection of the present disclosure.
Claims
1. A dental implant, characterized in that: include: Neck (1); and The root portion (2) is connected to the neck portion (1), and the root portion (2) includes at least two regions, and the bone absorption rate and / or bone formation rate of at least two of the regions are different.
2. The dental implant according to claim 1, characterized in that The bone absorption rate and / or bone formation rate of at least two of the regions are gradually set according to the absorption rate of the surrounding bones and the formation rate of new bones.
3. The dental implant according to claim 1, characterized in that At least two of the regions are respectively provided with a plurality of through holes, and the total flow areas of at least two of the regions are different.
4. The dental implant according to claim 1, characterized in that At least two of the regions are respectively provided with a plurality of through holes, and the porosity of at least two of the regions is different; and / or at least two of the regions are respectively provided with a plurality of through holes, and the apertures of the through holes in at least two of the regions are different.
5. The dental implant according to claim 1, characterized in that The surface treatment methods or treatment degrees of at least two of the regions are different; and / or, the materials used in at least two of the regions are different.
6. The dental implant according to claim 1, characterized in that At least two of the regions are respectively provided with a plurality of through holes, and in at least two of the regions, the arrangement of the through holes satisfies the following function: Wherein, x, y, z are the coordinates of a point, t is a parameter for controlling the aperture size of the through hole, and c is a parameter for controlling the porosity in the region.
7. The dental implant according to claim 1, characterized in that At least two of the regions are respectively provided with a plurality of through holes. After the arrangement of the through holes in two of the regions is determined, the through holes in the remaining regions are gradually formed according to the following formula: in, are the functions satisfied by the through holes in the two adjacent areas, α(x, y, z) is the function controlling the gradient layer, k is the parameter controlling the gradient speed, and G(x, y, z) is the function controlling the gradient shape.
8. The dental implant according to claim 1, characterized in that The elastic modulus of the root (2) is substantially equal to the elastic modulus of the bone tissue adjacent to the root (2).
9. The dental implant according to claim 1, characterized in that A plurality of through holes are respectively arranged in at least two of the regions, and at least one of the plurality of through holes extends to the outer surface of the root (2).
10. The dental implant according to claim 1, characterized in that The outer surface of the root (2) comprises a blade-like bevel (21).
11. The dental implant according to claim 1, characterized in that The neck (1) and the root (2) are detachably connected.
12. The dental implant according to claim 1, characterized in that It also comprises a screw (3), and the neck (1) and the root (2) are connected by the screw (3).
13. The dental implant according to claim 12, characterized in that The neck (1) and the root (2) are both provided with a cone portion that matches the screw (3), and the cone angle of the cone portion is 1:
20.
14. The dental implant according to claim 12, characterized in that A protrusion is provided at one end of the neck (1) close to the root (2), and a groove is provided at one end of the root (2) close to the neck (1), and the protrusion is inserted into the groove.
15. The dental implant according to claim 14, characterized in that The screw (3) passes through the protruding portion from an end of the neck (1) away from the root (2) and extends to the root (2).
16. The dental implant according to claim 1, characterized in that The outer circumferences of the neck (1) and the root (2) are both provided with threads (4).
17. The dental implant according to claim 1, characterized in that A self-tapping groove (5) is provided at one end of the root (2) away from the neck (1).
18. The dental implant according to claim 1, characterized in that The length of the root (2) is 1.5 to 2.5 times the length of the neck (1).
19. The dental implant according to claim 1, characterized in that The root portion (2) comprises a first portion close to the neck (1) and a second portion away from the neck (1); the second portion is provided with a plurality of through holes, and the through holes are filled with a material that can be absorbed by the human body.
20. The dental implant according to claim 19, characterized in that The human body absorbable material includes polylactic acid, polyglycolic acid or polycaprolactone.
21. The dental implant according to claim 1, characterized in that The neck (1) is a solid structure or a porous structure.