Bimolar root-implant and system

Abstract

The application discloses a kind of double root bionic implant and system.Crown neck connecting portion is in upper portion of implant body, and first root and second root are contained in lower portion, and wide U-shaped root bifurcation area is formed between two roots, and bone tissue is embedded to form bone embedding retention;Side wall is provided with lateral bone integration hole, and the inner cavity is formed by bone tissue growing into the cavity for three-dimensional bone locking;Internal connecting cavity is provided with anti-rotation structure and internal thread, and the base platform is axially locked by central screw.The system also includes healing base platform, repair base platform, central screw and closure cap.The application significantly improves the initial stability of molar area implant and the long-term bone combination quality by bionic double root anatomical form, multi-dimensional bone embedding and three-dimensional bone locking cooperative retention, effectively resists lateral force and rotational force, can reduce the risk of implant peri-implantitis, and realizes phased clinical repair.

Description

Technical Field

[0001] This invention relates to the field of dental implant medical device technology, and in particular to a double-root bionic implant and system. Background Technology

[0002] Tooth loss is very common in clinical dentistry, and dental implants are recognized as the best restoration method. At present, the mainstream cylindrical threaded implants have a regular shape. After being implanted into the extraction socket in the molar area, there is a large difference in shape between them and the socket wall. The initial stability is limited, and the retention is only achieved through osseointegration on the outer surface. The resistance to lateral forces and rotation is insufficient, and micromovement is prone to occur during functional occlusion, which affects the quality of osseointegration.

[0003] Natural molars typically have two to three irregularly tapered roots, forming bifurcation zones where bone tissue fits and holds the teeth in place, giving them excellent resistance to lateral forces and rotation. Current implants have failed to effectively mimic this anatomical feature, resulting in limited long-term effectiveness in high-occlusal-force molar regions.

[0004] Therefore, it is necessary to provide a biomimetic implant that can simulate the anatomical morphology of natural molars with two roots and achieve high stability retention through multidimensional bone inlay and three-dimensional bone locking, in order to meet the clinical needs of implant restoration in the molar region. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that existing cylindrical threaded implants cannot simulate the natural double-root anatomical morphology of molars, lack a root bifurcation bone interlocking and retention mechanism, and have insufficient resistance to lateral forces and rotation, making it difficult to meet the long-term stability requirements of high occlusal force conditions in the molar region.

[0006] In a first aspect, the present invention provides a bi-rooted bionic implant, comprising: a bionic implant body 1, wherein the upper part of the bionic implant body is a crown-neck connection part, and the lower part is a bi-root structure, wherein the bi-root structure includes a first root 2 and a second root 3, and a root bifurcation region is formed between the two roots. The root bifurcation region is a wide U-shaped arc surface, and bone tissue can be embedded in the root bifurcation region to form bone interlocking fixation; the sidewall of the bionic implant body is provided with at least one lateral bone integration hole 4, which penetrates the sidewall to allow bone tissue to grow in and form three-dimensional bone locking; the internal connecting cavity 5 is provided with an anti-rotation structure 51 and an internal thread 52, which are used to axially lock and fix the abutment by means of a central screw.

[0007] In some implementations, the outer contours of the first and second roots are non-axially symmetric irregular curved surfaces, the root tips are rounded, and the root bodies are conical curved surfaces that are wider at the top and narrower at the bottom, thus simulating the anatomical morphology of a natural molar or premolar with two roots. The bifurcation angle of the root bifurcation region is 10° to 40°, the length of the two roots is 4mm to 9mm, and the maximum depth of the U-shaped bifurcation region is 2mm to 5mm.

[0008] In some embodiments, the lateral osteointegration hole is an elliptical hole with a major diameter of 0.8 mm to 2.0 mm and a minor diameter of 0.5 mm to 1.5 mm, located on the lateral walls of the first and second tooth roots, with at least one on each side; the outer contour of the crown-neck connection is a rounded rectangle or circle with a height of 1 mm to 3 mm and a top outer diameter of 5 mm to 9 mm, which forms a circumferential anti-rotation limit with the alveolar bone wall after implantation.

[0009] In some embodiments, the anti-rotation structure includes three anti-rotation bosses 51 evenly distributed along the circumference of the cavity wall. The bosses have triangular or trapezoidal cross sections and a height of 0.5 mm to 1.5 mm. The cavity wall is connected from top to bottom as a base positioning stage, an anti-rotation boss section, and an internal thread section 52.

[0010] In some implementations, the outer surface of the bionic implant body is a smooth or rough bionic curved surface without threads. It is generated by three-dimensional modeling based on the three-dimensional anatomical morphology of natural molar roots and is implanted by pressing. The total height of the implant body is 10mm to 16mm, the diameter of the crown-neck connection is 3mm to 9mm, and the height of the root body is 8mm to 14mm.

[0011] Secondly, the present invention provides a bi-root bionic implant system, including the aforementioned bi-root bionic implant, and a matching abutment assembly 10, central screw 11, and sealing cap; the sealing cap is used to seal the opening of the connection cavity after implantation; the abutment assembly includes a healing abutment and a restorative abutment, the healing abutment is used to guide gingival shaping after osseointegration, and the restorative abutment is used to connect the final crown restoration; the central screw has an internal hexagonal drive hole at the top and an external threaded tapered structure at the bottom, which, after being screwed into the internal thread of the connection cavity, axially locks and fixes the abutment assembly.

[0012] The beneficial effects of this invention are as follows: By matching the shape of the biomimetic double root with the morphology of the natural molar extraction socket, the amount of cavity preparation is reduced and the initial stability is improved; the synergistic effect of the wide U-shaped root bifurcation area bone inlay and the three-dimensional bone locking of the lateral bone integration hole upgrades the bone retention force from single-dimensional surface bone integration to multi-dimensional three-dimensional anchoring, significantly improving the resistance to lateral forces and rotation; the rounded rectangular or circular crown neck connection and the 3-6 boss anti-rotation structure form a dual anti-rotation mechanism to prevent the abutment and restoration from loosening; the press-fit smooth or rough curved surface implant eliminates rotary cutting thermal damage and reduces the risk of bone burns; the two-stage abutment system effectively separates the osseointegration period and the restoration period, the sealing cap isolates the oral environment, ensures the quality of static healing of osseointegration, and the components of each stage are independently replaceable, making maintenance convenient, comprehensively improving the clinical success rate and long-term efficacy of implant restoration in the molar area.

[0013] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0015] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 A three-dimensional structural view of a double-rooted biomimetic implant according to an embodiment of the invention is shown; Figure 2 A front view of the structure of a bi-rooted biomimetic implant according to an embodiment of the invention is shown; Figure 3 A cross-sectional view of a bi-rooted biomimetic implant according to an embodiment of the invention is shown. Figure 4 The diagram shows a structural assembly of a dual-root biomimetic implant system according to an embodiment of the invention. Figure 5 A perspective view of a base according to an embodiment of the invention is shown; Figure 6 A front view of a base structure according to an embodiment of the invention is shown; Figure 7 A cross-sectional view of a base according to an embodiment of the invention is shown; Figure 8 A structural diagram of a screw for fixing a base is shown according to an embodiment of the invention. Detailed Implementation

[0016] The present application will be further described below with reference to specific embodiments and accompanying drawings. It is understood that the illustrative embodiments of this disclosure include, but are not limited to, related methods, devices, and systems. The specific embodiments described herein are merely for explaining the present application and not for limiting it. Furthermore, for ease of description, the accompanying drawings show only the parts relevant to the present application, and not all of the structures or processes.

[0017] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0018] See Figures 1 to 3 This embodiment provides a biomimetic implant with two roots, including a biomimetic implant body 1. The biomimetic implant body 1 has a non-axisymmetric biomimetic curved surface structure, with a crown-neck connection at the top and a two-root structure at the bottom. The two-root structure includes a first root 2 and a second root 3, both of which are tapered, wider at the top and narrower at the bottom, with rounded tips. The outer contour is generated through three-dimensional modeling based on the three-dimensional anatomical morphology of natural molar roots, simulating the anatomical morphology of natural molars or premolars with two roots. The total height of the biomimetic implant body is 10mm to 16mm, the diameter of the crown-neck connection is 3mm to 9mm, and the height of the root body is 8mm to 14mm, covering the root length range of commonly used molars and premolars in clinical practice. In this embodiment, the biomimetic implant body is inserted into the alveolar socket by pressing. Initial stability is achieved by matching the biomimetic shape with the morphology of the alveolar socket bone wall, eliminating the need for rotation and bone cutting, thus eliminating the risk of bone thermal damage during the screwing process and improving the safety of immediate implantation.

[0019] See Figure 1 , Figure 2 The first root (2) and the second root (3) form a bifurcation region, which is a wide U-shaped arc with a bifurcation angle of 10° to 40°. The lengths of the two roots range from 4mm to 9mm, and the maximum depth of the U-shaped bifurcation region is 2mm to 5mm. The surface morphology is modeled and generated based on the anatomical morphology of natural molar root bifurcation. After the implant is placed in the alveolar socket, the bone tissue embeds into the wide U-shaped bifurcation region, forming a bone-interlocking structure with the lateral surfaces of the two roots, thus providing significant resistance to rotation and lateral dislodgement. Compared with traditional cylindrical implants, the root bifurcation bone interlocking upgrades the retention force of the implant from one-dimensional surface osseointegration to three-dimensional root bifurcation bone interlocking when subjected to typical lateral occlusal forces in the molar region, significantly improving bone retention and stability.

[0020] See Figures 1 to 3 The bionic implant body 1 has lateral osseointegration holes 4 on its sidewalls. These elliptical holes have their major axis aligned along the axial direction of the implant body, with a major diameter ranging from 0.8 mm to 2.0 mm and a minor diameter ranging from 0.5 mm to 1.5 mm. They are located on the sidewalls of the first and second roots, with at least one on each side, penetrating the implant sidewall and communicating with the hollow cavity. After implantation, bone tissue grows inward into the cavity through the lateral osseointegration holes 4, forming a three-dimensional bone tissue surround and fixation, further upgrading the bone retention force to three-dimensional bone locking. The lateral osseointegration holes and the root bifurcation bone intercalation work synergistically to form a multi-dimensional bone anchoring network, providing higher long-term stability and pull-out resistance compared to simple surface osseointegration.

[0021] See Figure 1 , Figure 2The outer contour of the crown-neck connector is a rounded rectangle or circle, with a flat top surface and a circular opening communicating with the connecting cavity 5. The height of the crown-neck connector is 1mm to 3mm, and the outer diameter of the top is 3mm to 9mm. After the implant is placed in the jawbone, the rounded rectangular outer contour forms a circumferential mechanical constraint with the coronal wall of the alveolar bone, providing anti-rotational retention at the morphological level and preventing the implant from rotating and shifting under occlusal load, thus overcoming the limitation of cylindrical implants that rely solely on friction for anti-rotation.

[0022] See Figure 2 , Figure 3 The connecting cavity 5 extends axially downwards from the coronal neck connection. From top to bottom, the cavity wall comprises an abutment positioning stage, an anti-rotation boss section, and an internal thread section 52. The anti-rotation structure 51 includes 3-6 anti-rotation bosses evenly distributed circumferentially along the cavity wall. The bosses have triangular or trapezoidal cross-sections, protruding radially inwards from the cavity wall. The boss height is 0.5mm to 1.5mm, and they engage with matching grooves on the outer wall of the abutment, restricting the abutment's rotational freedom within the connecting cavity. The abutment positioning stage provides precise axial positioning for the abutment. The internal thread section 52, after engaging with the external thread of the central screw 11, axially locks the abutment, forming a three-in-one abutment connection structure integrating step positioning, boss anti-rotation, and screw locking, ensuring the stability of the restoration under functional loads.

[0023] See Figure 4 This embodiment provides a dual-root biomimetic implant system, including the aforementioned dual-root biomimetic implant, abutment assembly 10, central screw 11, and sealing cap (not shown in the figure). See also Figures 5 to 7 The abutment assembly 10 includes a healing abutment and a repair abutment. The repair abutment is generally trumpet-shaped, wider at the top and narrower at the bottom. Its lower end has an outer contour connecting section that matches the anti-rotation boss. After being inserted into the connecting cavity 5, it engages with the anti-rotation structure 51 to achieve circumferential locking. The outer wall of the abutment has a rectangular through-window for easy positioning confirmation. See also... Figure 7 The base cavity is divided into a wide section and a threaded section from top to bottom. The wide section accommodates the head of the central screw 11, and the stepped surface provides anti-reverse support for the screw head. See also Figure 8 The central screw 11 has an internal hexagonal drive hole at its tip, which, when used with a hexagonal wrench, applies tightening torque. The screw has an external thread structure with a tapered tip at the bottom. After being screwed into the implant connection cavity thread 52, it axially locks the abutment. This system supports two-stage restoration: after the first-stage implantation, a sealing cap is screwed in to seal the connection cavity, isolating the oral environment and allowing the implant to heal quietly during the osseointegration period, unaffected by occlusal forces; after osseointegration is complete (usually 2 to 3 months), a healing abutment is installed to guide gingival shaping; after gingival healing, the restorative abutment and connecting crown are replaced to restore chewing function. Each stage component can be replaced independently, making maintenance convenient and significantly reducing clinical trauma from secondary surgery.

[0024] In one embodiment, the 3D modeling data of the bionic implant body 1 is derived from the 3D reconstruction results of the patient's autologous extracted molars or premolars obtained by cone-beam computed tomography (CBCT). The implant body is custom-manufactured according to the patient's individualized root contour, ensuring a precise anatomical match between its shape and the patient's original extraction socket. This individualized design maximizes the use of residual bone in the extraction socket, controlling the fit gap between the implant and the socket wall to within 0.1 mm, resulting in significantly better initial stability than standard-sized implants. Due to the highly adaptive shape, blood clots are evenly distributed between the implant surface and the socket wall, promoting bone regeneration and shortening osseointegration time while reducing the risk of bone resorption in the extraction socket. In clinical applications, this approach is particularly suitable for immediate implantation in molar areas with irregular extraction socket shapes and insufficient bone volume, achieving a precise one-to-one fit between the implant and the extraction socket.

[0025] In one embodiment, a root bifurcation bone-fitting guide groove is provided on the curved surface of the root bifurcation region. The guide groove extends inward along the wide U-shaped bottom of the root bifurcation region, with a depth of 0.5 mm to 1.5 mm and a width of 1 mm to 3 mm. After the bone tissue is embedded in the guide groove, a bone-locking interface perpendicular to the axial direction is formed between the solidified bone and the side walls of the guide groove. Under axial pull-out force, the bone-locking interface generates significant shear resistance against the implant, providing pull-out resistance far superior to that of simple surface ossification. The bone-fitting guide groove and the wide U-shaped root bifurcation region work synergistically to form a dual fixation mechanism of macroscopic bone fitting and bone-locking interface, further enhancing pull-out resistance compared to designs without guide grooves. This structure becomes effective after implant healing without additional manipulation, representing a passively induced bone-locking design with high clinical reliability.

[0026] In one embodiment, the inner wall of the lateral osseointegration hole 4 is provided with micro / nano-scale spiral grooves, with a groove depth of 10 μm to 500 μm and a pitch of 50 μm to 300 μm, formed by laser surface modification or chemical etching. The introduction of micro / nano-scale grooves significantly increases the effective contact area of ​​the inner wall of the lateral osseointegration hole, and through the geometric guidance effect of the grooves, induces osteoblasts to grow in a directional alignment along the spiral direction of the grooves, accelerating the rate of bone ingrowth into the lateral osseointegration hole. Studies have shown that the surface of the micro / nano-grooves can promote a 30% to 50% increase in bone contact rate, and combined with the three-dimensional bone locking effect of the lateral osseointegration hole, both the bone integration strength and rate are significantly improved. The laser surface modification process can also remove the surface oxide layer while forming the micro / nano-grooves, improving the wettability of the implant surface and further enhancing the early adhesion efficiency of osteoblasts.

[0027] In one embodiment, the bionic implant body 1 is manufactured using a composite manufacturing process, comprising a central structural core and a bionic root-shaped shell. The central structural core is a regular cylindrical structure, precision machined using CNC machine tools, and includes a connecting cavity 5, an anti-rotation boss 51, and internal threads 52, ensuring that the abutment fit tolerance grade is not lower than H7 / h6, and ensuring the precision and repeatability of the abutment connection. The bionic root-shaped shell is an irregular bionic tooth root morphology structure, manufactured using 3D printing technology, including the outer curved surfaces of the first tooth root 2 and the second tooth root 3, the lateral bone integration hole 4, and the root bifurcation area, accurately replicating the irregular anatomical contour of a natural molar root. The central structural core and the bionic root-shaped shell are fixedly connected by one or more of the following methods: threaded connection, welding, or biocompatible adhesive, forming a composite body integrating a regular precision component and an irregular bionic component. This composite manufacturing process solves the contradiction between the difficulty of ensuring the precision of the internal cavity fit and the biomimetic irregular shape in the traditional integral processing method. It achieves the unity of precision function and biomimetic aesthetics, and can support the individualized customization and replacement of biomimetic root-shaped shells, thereby reducing the system production cost.

[0028] In one embodiment, the outer surface of the biomimetic implant body 1 is provided with a pH-responsive antibacterial coating, which consists of biodegradable polymer microcapsules carrying antibacterial active ingredients. When inflammation occurs in the peri-implant tissue, local metabolic acid production lowers the environmental pH to below 5.5. The microcapsules undergo acid-responsive degradation and release antibacterial drugs in a targeted manner, achieving adaptive control of peri-implantitis. The core advantage of this design lies in on-demand drug release: under normal physiological conditions (pH 6.8 to 7.4), the microcapsules remain intact, without ineffective drug release; they respond precisely only when inflammation is triggered, effectively prolonging the duration of drug action and reducing the side effects of systemic medication. Compared with systemic antibiotic treatment, local targeted drug release can create a high-concentration antibacterial microenvironment around the implant, significantly improving antibacterial efficiency, reducing the risk of drug resistance, and extending the long-term lifespan of the double-root biomimetic implant, especially suitable for patients with weakened immune function or at risk of peri-implantitis.

[0029] In one embodiment, the tip of the central screw 11 is also equipped with a ring structure for connecting a force measuring device. This, in conjunction with a spring force gauge, allows for periodic measurement of the extraction resistance of the double-root bionic implant during the bone healing period. When the extraction force reaches a preset threshold (not less than 0.1N), osseointegration is deemed mature, and the patient is permitted to proceed to the second-stage restoration phase. This achieves an objective and quantitative assessment of osseointegration status, avoiding the risk of premature loading caused by relying solely on clinical experience to determine osseointegration maturity. This force measuring mechanism is simple to operate, requires no additional imaging examinations, and can be performed in the clinic, providing clinicians with a quantitative basis for decision-making and upgrading the timing of second-stage restoration from qualitative judgment to quantitative assessment. Furthermore, by continuously tracking the dynamic changes in extraction resistance, early detection of osseointegration abnormalities can be achieved, allowing for timely intervention and improving the long-term survival rate of the implant.

[0030] In one embodiment, the lengths of the first root 2 and the second root 3 may differ. The relative length difference between the two roots (within the range of 0 to 3 mm) is adjusted to accommodate the irregular bone surface morphology of the alveolar bone. The axial angle and torsion angle of the two roots can be individually adjusted based on the alveolar socket morphology in the patient's CBCT images to maximize the use of available bone and enhance multi-directional pull-out resistance. This asymmetric dual-root design overcomes the limitations of traditional symmetrical implant designs. It can address clinical situations with uneven bone volume on the buccal or lingual or mesial and distal sides by extending the longer root to areas with sufficient bone and adapting the shorter root to areas with relatively thin bone, achieving optimal bone retention distribution without damaging the bone wall. This approach, combined with CBCT three-dimensional digital design, can generate customized implant specifications for each patient, significantly improving the success rate of immediate implantation in the molar region.

[0031] In one embodiment, the mesiodistal width of the rounded rectangular outer contour of the crown-neck connector is greater than its buccal-lingual width, with a width-to-length ratio of 1:1.1 to 1:1.2. This allows the crown-neck connector to form an elliptical or rectangular fit with the coronal opening of the alveolar bone, providing greater mesiodistal stability in the molar region and conforming to the anatomical characteristics of the coronal opening of the molar alveolar bone. Axial ridges are provided at the four rounded corners of the crown-neck connector. After implantation, these ridges form a circumferential mechanical lock with the alveolar fossa bone wall, further enhancing initial anti-rotational stability. Compared to a square cross-section, the elliptical rectangular cross-section increases mesiodistal stability without affecting the buccal-lingual bone wall thickness, better conforming to the bone anatomy of the molar region and reducing the risk of coronal bone wall damage to the implant.

[0032] In one embodiment, a specialized implantation instrument kit is used with the dual-root bionic implant. The kit includes: a dual-root guiding reamer, whose shape precisely matches the structure of the dual roots, used to prepare a bone cavity within the alveolar socket that conforms to the morphology of the dual roots, ensuring uniform placement of each implant and preventing skewed placement where one is too deep and the other is suspended; a bone-chistosome shaping device, used to refine the shape of the bone cavity in the bifurcation area, ensuring precise fit between the wide U-shaped bifurcation area and the bifurcation surface of the implant root, maximizing the bone-chistosome retention effect; and a torque-limiting handle, which, in conjunction with the rounded rectangular shape of the crown-neck connector, applies precise implantation pressure, preventing excessive implantation force from damaging the bone wall, ensuring uniform placement of both roots at equal depth and speed, and improving the repeatability and safety of the surgical procedure. The specialized instrument kit, designed in synergy with the implant system, simplifies the surgical steps of dual-root bionic implantation in the molar region, reduces the surgeon's learning curve, and facilitates clinical application.

[0033] In one embodiment, the transgingival contour curve of the abutment is generated by mapping the anatomical morphology data of the corresponding natural molar neck, ensuring a close fit between the transgingival shape of the abutment and the gingival papilla and marginal gingival contour, restoring the natural transgingival contour of the molar region. The top surface of the abutment is equipped with a positioning platform that matches the occlusal surface morphology, ensuring precise placement of the crown restoration and preventing rotation under functional loads. This individualized transgingival contour design avoids excessive pressure on the gingival soft tissue or excessive gaps in the transgingival area, promoting a healthy and stable biological seal, reducing the incidence of peri-implantitis, and achieving coordinated aesthetic reconstruction of soft and hard tissues in double-root biomimetic implant restorations. This results in a final restoration that highly simulates natural teeth in both function and aesthetics.

[0034] This invention, a bipedal bionic implant and system, builds upon a basic bionic structure and further enhances its multi-dimensional comprehensive performance through a series of innovative technologies: CBCT-based individualized customization achieves precise anatomical matching of the extraction socket; the root bifurcation bone inlay guide groove and lateral bone integration hole micro-nano groove synergistically improve bone locking strength and bone integration rate; composite manufacturing processes resolve the manufacturing contradiction between the precision internal cavity and the bionic shape; pH-responsive antibacterial coating enables on-demand targeted antibacterial action, extending service life; a force assessment mechanism provides objective quantitative evidence for osseointegration assessment; the asymmetric bipedal design and mesiodistal elliptical crown neck depth adapt to individual bone volume differences; a dedicated implant instrument kit reduces surgical difficulty and error; and individualized transgingival abutment achieves coordinated aesthetic reconstruction of soft and hard tissues. These synergistic technical features constitute a complete innovative system encompassing implant morphology bionics, bone retention mechanisms, manufacturing processes, intelligent coatings, and clinical operation toolchains, representing the cutting-edge technology direction of bionic implant restoration in the molar region and possessing significant clinical application value.

[0035] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0036] The methods and systems of the present invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of the present invention are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, the present invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers recording media storing programs for performing the methods according to the present invention.

[0037] The description of this invention is given for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A biomimetic implant with two rootlets, characterized in that, include: The bionic implant body has a crown-neck connection at the top and a double root structure at the bottom. The double-root structure includes a first root and a second root, with a root bifurcation region formed between the first root and the second root. The root bifurcation region has a wide U-shaped arc surface, and bone tissue can be embedded in the root bifurcation region to form bone intercalation and fixation. The bionic implant body has at least one lateral bone integration hole on its side wall, which penetrates the side wall of the bionic implant body to allow bone tissue to grow in and form a three-dimensional bone lock. The bionic implant body has an axially extending connecting cavity inside, and the connecting cavity has an anti-rotation structure. The bottom of the connecting cavity has an internal thread for axially locking and fixing the base plate to the connecting cavity by means of a central screw.

2. The biomimetic implant with two rootlets according to claim 1, characterized in that, Both the first and second roots are biomimetic root shapes, with an outer contour that is an irregular curved surface that is not axially symmetric. The root tip is rounded and blunt, and the root body is a conical curved surface that is wider at the top and narrower at the bottom. Overall, they simulate the anatomical shape of a natural molar or premolar with two roots.

3. The biomimetic implant with two rootlets according to claim 1, characterized in that, The bifurcation angle of the root bifurcation region is 10° to 40°, the length of the first root and the second root is 4mm to 9mm, and the maximum depth of the U-shaped bifurcation region between the two roots is 2mm to 5mm. The curved shape of the root bifurcation region is modeled and generated based on the anatomical shape of the natural molar root bifurcation. After the bone tissue is embedded in the root bifurcation region, it forms bone interlocking and locking with the sides of the two roots, providing anti-rotation and anti-lateral dislodgement capabilities.

4. The biomimetic implant with two rootlets according to claim 1, characterized in that, The lateral osseointegration hole is an elliptical hole with its long axis arranged along the axial direction of the bionic implant body. The long diameter is 0.8 mm to 2.0 mm and the short diameter is 0.5 mm to 1.5 mm. The lateral osseointegration hole is located on the sidewall of the first root and the second root, with at least one on each side, allowing bone tissue to grow into the root cavity from both sides to form a three-dimensional bone lock.

5. The biomimetic implant with two rootlets according to claim 1, characterized in that, The outer contour of the crown-neck connector is a rounded rectangle or a circle, and the top surface is a flat surface with a circular opening communicating with the connecting cavity; the height of the crown-neck connector is 1mm to 3mm, and the outer diameter of the top is 5mm to 9mm; after the rounded rectangle is implanted into the bone, it forms a circumferential limit with the alveolar bone wall, providing anti-rotation retention.

6. The biomimetic implant with two rootlets according to claim 1, characterized in that, The anti-rotation structure inside the connecting cavity includes 3-6 anti-rotation bosses evenly distributed along the circumference of the cavity wall. The anti-rotation bosses have a triangular or trapezoidal cross-section and protrude radially inward from the cavity wall. The height of the bosses is 0.5mm to 1.5mm. The anti-rotation bosses and the matching grooves on the outer wall of the base plate are interlocked to restrict the rotational freedom of the base plate within the connecting cavity.

7. The biomimetic implant with two rootlets according to claim 1, characterized in that, The connecting cavity extends downward from the crown-neck connection part. The wall of the connecting cavity is provided with a stepped structure, which consists of the following steps from top to bottom: the base positioning stage, the anti-rotation boss section, and the internal thread section. The base positioning stage is used for axial positioning of the base. The anti-rotation boss section is used to restrict the rotation of the base. The internal thread section engages with the external thread of the central screw to lock the base axially.

8. The biomimetic implant with two rootlets according to claim 1, characterized in that, The outer surface of the bionic implant body is a smooth or rough bionic curved surface structure without threads. The overall shape is generated by three-dimensional modeling based on the three-dimensional anatomical shape of the natural molar root. The bionic implant body adopts a press-in implantation method, relying on the morphological matching between the bionic shape and the alveolar bone wall to achieve initial stability and reduce thermal damage to the bone caused by screwing and cutting.

9. The biomimetic implant with two rootlets according to claim 1, characterized in that, The biomimetic implant has a total height of 10mm to 16mm, a crown-neck connection diameter of 3mm to 9mm, and a root body height of 8mm to 14mm.

10. A double-root biomimetic implant system, characterized in that, Includes the bi-root bionic implant as described in any one of claims 1 to 9, and its matching abutment assembly, screws and sealing cap; The sealing cap is used to seal the opening of the connecting cavity after implantation and to isolate the oral environment during osseointegration. The abutment assembly includes a healing abutment and a restorative abutment. The healing abutment is used to guide gingival shaping after osseointegration, and the restorative abutment is used to connect the final crown restoration. The central screw has an internal hexagonal drive hole at the top and an external threaded tapered structure at the bottom. After being screwed into the internal thread of the connecting cavity, it axially locks and fixes the base assembly.

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