117 results about "Stress shielding" patented technology

The invention discloses a bionic lantern frame composite internal fixing device and a preparation method, and relates to the technical field of orthopedic medical instruments, the bionic lantern frame composite internal fixing device comprises an implant and a multi-rod bridging structure, the multi-rod bridging structure is composed of a plurality of longitudinal connecting rods and transverse locking nails, and the implant is composed of a plurality of multi-level bionic structures; the multi-layer bionic structure comprises two hexagonal upper and lower layer structures which are symmetrically arranged and a middle spiral layer structure arranged between the two hexagonal upper and lower layer structures. According to the invention, inspired from honeycomb and ox horn macro-microstructure, the multi-level bionic structure prepared by adopting a coupling bionic technology has excellent mechanical properties and strong buffering and vibration absorbing capabilities, can be effectively matched with the mechanical properties of natural bones, and can effectively avoid secondary injury and stress shielding effect after implantation of a patient; the composite coating introduced through an electrochemical deposition method solves the problems that a single implant structure is insufficient in biocompatibility, insufficient in antibacterial property and weak in osteogenic differentiation capacity.

The invention discloses a self-adaptive bionic cancellous bone defect prosthesis and a design method thereof, and belongs to the technical field of medical prostheses, the prosthesis is composed of biological interface gradient microporous structure parts and a main body bionic truss supporting structure part, the biological interface gradient microporous structure parts are arranged at the two ends of the main body bionic truss supporting structure part, and the main body bionic truss supporting structure part is arranged on the main body bionic truss supporting structure part. The method is mainly used for reconstructing bone defects, bionically designing a truss part of a main body with consistent arrangement direction and form of human body bone trabecula through an established linear relation between CT gray value and bone density-elasticity modulus, adaptively matching mechanical conduction of a bone structure, reducing stress shielding effect, and improving bone defect reconstruction efficiency. Meanwhile, various complex mechanical working condition requirements of the prosthesis are met, the prosthesis failure risk is reduced, and the service life of the prosthesis is prolonged.

The invention relates to the technical field of medical auxiliary instruments, and discloses an adjustable limb fixing brace which comprises a fixing mechanism, the fixing mechanism comprises a fixing band, and the adjustable limb fixing brace further comprises an air bag arranged on the inner side of the fixing band and used for being attached to a human limb to fix a wound part; the air inflation assembly is arranged on the outer side of the fixing band and used for converting the air bag from the compressed state to the expanded state; and the fine adjustment assembly is arranged between the air bag and the inflation assembly. According to the adjustable limb fixing brace, air inflation of the air bag is completed through the air inflation assembly to achieve uniform pressure distribution, the problems of stress shielding and local compression caused by rigid connection of an integrated brace are solved, and when a wound part of a patient swells, the fine adjustment assembly allows the air bag to be adjusted in real time according to the limb swelling degree; therefore, the problems that the pressure intensity at a fixed point is too large and single-point stress is concentrated are solved.

The invention discloses a bionic heterogeneous composite structure bone implant and a preparation method thereof, and relates to the technical field of medical implants.The bionic heterogeneous composite structure bone implant comprises an inner-layer cross-shaped structure, a middle-layer negative Poisson's ratio structure and an outer-layer honeycomb structure, and the cross-shaped structure, the negative Poisson's ratio structure and the honeycomb structure jointly form a bionic composite structure; and immersing the bionic composite structure subjected to double-network crosslinking into a drug-containing solution for post-treatment and drug loading to obtain the bionic heterogeneous composite structure. According to the invention, bionic adaptation and intelligent optimization of mechanical properties are realized, and the stress shielding problem is solved; according to the invention, osseointegration and vascularization processes are obviously accelerated and enhanced, and leap-type improvement of biological activity is realized; a novel intelligent treatment mode based on in-vivo microenvironment response is developed, and on-demand and accurate drug delivery is achieved.

The invention provides an interbody fusion cage. The interbody fusion cage comprises an upper vertebral plate, a lower vertebral plate and a shell, the driving device comprises a driving rod, and a bevel gear pair is arranged on one side of the driving rod; the transmission bevel gear is meshed with the bevel gear pair; the top of the supporting rod is provided with a first spherical hinge, the first spherical hinge is embedded into the spherical seat of the upper vertebral plate, the outer surface of the supporting rod is provided with a transmission thread, and the bottom of the supporting rod is provided with a second spherical hinge; the sleeve is arranged on the outer surface of the supporting rod in a sleeving mode, and the top of the flexible base abuts against the second spherical hinge. According to the technical scheme, the stress shielding effect in the implanting process of the interbody fusion cage can be effectively achieved, and the technical problem that the interbody fusion cage is attached to the physiological curvature can be effectively solved.

The present invention discloses a novel bone transport intramedullary nail, comprising an intramedullary nail main nail, the intramedullary nail main nail is a hollow structure, the intramedullary nail main nail comprises an intramedullary nail proximal end and an intramedullary nail main body, the intramedullary nail proximal end and the intramedullary nail main body are an integrated structure, the intramedullary nail proximal end has a diameter greater than the diameter of the intramedullary nail main body, the intramedullary nail proximal end is provided with a through dynamic screw hole and a static screw hole, an adjustment hole is provided on the intramedullary nail main body away from the intramedullary nail proximal end, a dynamic bone screw is installed in the dynamic screw hole, the dynamic bone screw can move axially along the dynamic screw hole, a tail cap is installed on the proximal side of the intramedullary nail, an elastic body 1 is provided between the tail cap and the dynamic bone screw, and a bone transport device for adjusting the movement of the fracture end is provided on the intramedullary nail main body. The elastic device can give stress stimulation to the bone segment, avoid stress shielding, accelerate fracture healing, reduce delayed fracture healing and non-union, and reduce the incidence of re-fracture after removing the intramedullary nail.

The invention discloses a preparation method of a bionic beetle skeleton implant, and belongs to the field of femoral implantation. The bionic structure characteristics of beetle elytra and cuticle are creatively combined, the mechanical strength and structural stability of the porous nickel-titanium alloy structure implant are effectively improved through the bionic structure design method, and the long-standing stress shielding effect problem of a traditional femoral metal implant is successfully solved; the porous nickel-titanium alloy bionic skeleton structure prepared by adopting a selective laser melting (SLM) technology not only has good mechanical suitability, avoids rejection and shedding reaction with natural bone tissues after implantation, but also can realize a complete shape memory recovery function in a room temperature environment, and has good application prospects in the field of medical orthopedic implantation.

The invention relates to the technical field of medical implants, in particular to a 4D printing-based porous Niti alloy bionic bone gradient structure construction method, which comprises the steps of patient bone data acquisition, bionic gradient model design, NiTi powder preparation, 4D printing, thermal treatment activation of memory effect, surface functionalization treatment and mechanical / biological performance test. The method is characterized by comprising the following preparation steps: accurately acquiring bone structure data through CT / MRI, combining Mimics pretreatment and UG / NX modeling, designing aperture and porosity for differentiation of cortical bone (low porosity of 30%-40%) and cancellous bone (high porosity of 50%-70%), simulating typical load working conditions through ANSYS, enabling the elastic modulus (3-15 GPa) and compressive strength (80-200 MPa) to be close to natural bone, and finally obtaining the bone structure data through the CT / MRI, the pore diameter and porosity of the cortical bone (low porosity of 30%-40%) and the porosity of the cancellous bone (high porosity of 50%-70%). According to the design, the elastic modulus difference between the implant and the host bone is remarkably reduced, the bone resorption problem caused by stress shielding is avoided, meanwhile, continuous porosity transition is achieved through the power gradual change technology, and the structural stability under the complex load is improved.

A three-dimensional (“3D”) printed orthopedic fixation implant can reduce stress shielding and / or enhance osseointegration. The implant can include: a head defining a proximal end of the implant; a tip defining a distal end of the implant; a core extending from the head to the tip, the core being elongate; and threads extending along at least a portion of the core. One or more functionally graded lattice structures can be propagated longitudinally and / or radially in at least portions of the core. A density of the one or more functionally graded lattice structures can have a varying longitudinal gradient and a varying radial gradient.

The present application relates to femoral stem prosthesis, specifically provides a femoral stem prosthesis with twisted trabecular structure, aims to solve the problem that although the existing femoral stem prosthesis has trabecular porous structure to promote bone growth, but still due to the high material elastic modulus and stress concentration inside the pore, leading to stress shielding effect and trabecular fracture, so it is difficult to effectively prevent long-term loosening of the prosthesis. For this purpose, a femoral stem prosthesis with twisted trabecular structure of the present application comprises a trabecular structure unit arranged on the surface layer of the prosthesis, the shape of the trabecular structure unit is a space net structure, the space net structure is provided with pores, the pores can accommodate new bone, and the space net structure is twisted from the inside of the prosthesis to the surface layer of the prosthesis. The present application introduces the mechanical regulation effect brought by structure twisting by arranging the space net trabecular structure which is twisted continuously from inside to outside on the surface layer of the prosthesis, on the basis of ensuring that the pores can be used for new bone growth and realizing bone-prosthesis biological fixation.

The invention discloses a bionic type tibia intramedullary nail and a matched instrument thereof, and relates to the technical field of medical instruments, and the bionic type tibia intramedullary nail comprises an intramedullary nail body; the intramedullary nail body comprises an intramedullary nail near end, an intramedullary nail middle section and an intramedullary nail far end, the intramedullary nail middle section is inserted into the intramedullary nail near end in a threaded mode, and the intramedullary nail far end is inserted into the intramedullary nail middle section in a threaded mode; according to the intramedullary nail, through the sectional type thread inserting design of the intramedullary nail near end, the intramedullary nail middle section and the intramedullary nail far end and the matching of the variable pitch gradient structures of the near end thread, the middle section thread and the far end thread, precise adaptation of the intramedullary nail and the anatomical form of the tibia marrow cavity is achieved, and a gradient mechanical buffering system is formed by the near end thread, the middle section thread and the far end thread; the problem of stress shielding caused by the fact that rigidity of a traditional intramedullary nail is not matched with a skeleton is effectively solved, meanwhile, the variable-pitch threads and the thread depth gradual change design are adopted, damage to an endosteum during nail placement is reduced, uniform stress conduction is achieved, local stress concentration is avoided, and the risks of osteoporosis, delayed fracture healing and secondary fracture are reduced.

The invention relates to the technical field of medical instruments, in particular to a hip joint thighbone prosthesis and a hip joint thighbone prosthesis manufacturing method. The hip joint femoral prosthesis comprises a spherical prosthesis main body and a connecting part, the spherical prosthesis main body is provided with an opening, one end of the connecting part extends into the spherical prosthesis main body and is connected with the spherical prosthesis main body, and the other end of the connecting part extends out of the opening; wherein the inner wall of the spherical prosthesis main body is provided with a functional gradient porous structure, and the porosity and the pore diameter of the functional gradient porous structure are gradually increased from the inner wall of the spherical prosthesis main body to the center direction of the spherical prosthesis main body in the preset direction. According to the hip joint thighbone prosthesis, the service life of a surface replacement type hip joint thighbone prosthesis can be prolonged, the problem that an existing biological fixation type prosthesis is loosened and loses efficacy due to stress shielding is solved, and the risk that a porous structure is prone to falling off from a base body in a long-term load environment is reduced.

A surgical fixation system can include a fixation device, a loop connected to the fixation device, a graft carried by the loop, and a reinforcement material. Surgical fixation systems can be used in various tissue reconstruction procedures, including but not limited to, ACL and PCL reconstructions. The graft and the reinforcement material may be tensioned independently of one another to avoid stress shielding the graft.

The invention relates to a biomedical zirconium alloy with ultralow elastic modulus and a preparation method thereof. The alloy comprises the following three alloy elements in percentage by mass: 71 to 80 weight percent of Zr, 20 weight percent of Nb, 1 to 9 weight percent of Ta and the balance of inevitable impurities. In the preparation process, by regulating and controlling the Ta content and combining three-stage solid solution-aging quenching heat treatment, the beta-Zr phase is effectively stabilized, and collaborative optimization of the elastic modulus and the strength of the alloy is achieved. According to the alloy obtained through the method, along with the increase of the Ta content, the tensile strength of the alloy is in the trend that the tensile strength is firstly increased and then decreased, and the elastic modulus is firstly decreased and then increased; when the Ta content is optimal, the lowest elasticity modulus of the alloy can reach 15.2 GPa, the tensile strength peak value can reach 861 MPa, the stress shielding effect is remarkably inhibited, and the mechanical matching property with bone tissues and the long-term stability of implants are greatly improved.

The utility model relates to the intervertebral fusion cage technical field discloses a kind of anti-drop intervertebral fusion cage. To solve the stress shielding problem in the actual use of conventional intervertebral fusion cage in prior art, and porosity is lower, fusion rate is low after operation;Lack of bone integration channel, the technical problem of low fusion rate after operation. The utility model includes support frame, at least two bone graft channels are arranged on support frame, to fill bone induction material and promote bone growth;Support frame end is provided with clamping groove;Support frame includes edge support part, and edge support part is connected by porous structure between;The porosity of porous structure gradually changes from small to large by the direction close to far from vertebral body, and presents gradient distribution. The utility model effectively balances the problem of insufficient porous structure strength, and the problem of too large solid structure quality, and the porosity of porous structure is large, has more bone integration channel, is conducive to the growth of bone cell, and can effectively improve bone growth rate.

The present invention discloses a degradable magnesium mesh for personalized reconstruction of alveolar bone defects in 3D printing; the magnesium mesh designs a personalized model structure based on CT data, and uses 3D printing technology to achieve high-precision preparation of the magnesium mesh, so that the magnesium mesh closely fits the anatomical shape of the alveolar bone; it overcomes the disadvantages of traditional titanium meshes that need to be bent during surgery and have a high exposure rate after surgery, reduces the surgical difficulty and time, and improves the surgical success rate. The surface of the magnesium mesh is a completely open regular hexagonal structure, and this mesh hole structure has the advantages of self-supporting, easy forming, high printing accuracy, and good mechanical properties. At the same time, combining the degradability of magnesium materials and the osteogenic advantages of magnesium ion bone induction, it solves problems such as stress shielding of titanium meshes, non-degradability, and the need for secondary surgery to remove them during dental implantation. The preparation process of the present invention is simple, the preparation cycle is short, the loss of raw materials is small, the repeatability is high, there is no pollution, and the obtained magnesium mesh has the characteristics of controllable shape and high precision, and can be used as a new generation of repair scaffolds for large-area bone defects in oral alveolar bone.

The invention discloses an optimization method, device and equipment of a biodegradable bone fracture plate and a storage medium, and is applied to the technical field of medical instruments, and the method comprises the following steps: constructing a finite element model of femoral shaft fracture; in the finite element model, applying a dynamic biomechanical load simulating a human body walking cycle; the stress level of the bone fracture plate and the displacement level of the fixed thighbone are used as optimization targets, and multi-dimensional parameters of the bone fracture plate are optimized; delimiting a safety area of the bone fracture plate according to the optimized bone fracture plate design parameters; according to the method, the technical steps of base material type selection and process optimization, finite element model construction and dynamic load application, multi-dimensional parameter optimization, safety area demarcation and personalized adaptation and the like are organically combined; the technical problems of secondary operation, stress shielding, high biological safety risk, poor adaptability, high engineering difficulty and the like of a traditional bone fracture plate are effectively solved.

The present invention provides an integrated design and manufacturing technology for a bone cartilage biomimetic gradient scaffold. The invention includes a functionally graded integrated bone cartilage biomimetic gradient scaffold, a transition structure for achieving graded transition between hard bone and cartilage tissue, and a biomimetic cartilage formation and post-processing method. The integrated bone cartilage biomimetic gradient scaffold is a porous interconnected ceramic structure that can be manufactured through integrated additive manufacturing. The transition structure is a special structure for firmly connecting hard bone and cartilage. The biomimetic cartilage formation and post-processing method involves performing special treatment on the 3D-printed bone scaffold to form biomimetic cartilage, thereby improving the strength of the cartilage layer and preventing cartilage damage caused by joint friction. The bone cartilage biomimetic scaffold structure proposed by the present invention has effective functional grading to mimic natural bone cartilage tissue, which is beneficial for preventing stress shielding and can be manufactured in one piece using 3D additive manufacturing technology.

The utility model relates to a kind of 3D printing's embedded titanium-magnesium alloy bone repair body, belong to bone repair body field, solve the existing single titanium alloy bone repair body elastic modulus and human skeleton difference in prior art is larger, it is prone to stress shielding effect, and the single magnesium alloy bone repair body mechanical strength and corrosion resistance is poor.The utility model includes titanium alloy cylinder, magnesium alloy structure and inlay structure, magnesium alloy structure is connected with titanium alloy cylinder by inlay structure;Multiple evenly distributed inlay grooves are equipped along the circumference of titanium alloy cylinder, both sides of inlay groove are equipped with directional slide, magnesium alloy structure is arranged in inlay groove, both sides of magnesium alloy structure are equipped with limit protrusion, limit protrusion and directional slide sliding connection.The utility model inlay magnesium alloy structure in titanium alloy cylinder, rely on titanium alloy cylinder to provide mechanical support, magnesium alloy structure gradually degrades to promote bone growth, the defect of single material is effectively avoided by the combination of both.

The invention belongs to the technical field of oral implant restoration, and particularly relates to a porous implant based on a TPMS bionic structure and a model construction method thereof.The porous implant comprises a base body, the base body is provided with an upper entity section, a porous section and a lower entity section, the surface of the upper entity section and the surface of the lower entity section are of threaded structures, and the porous section and the upper entity section are of threaded structures. The surface of the porous section is of a porous extremely-small curved surface structure, the interior of the porous section is of a solid structure, the porous structure and the solid structure are integrally formed, and the porous section is located below the bone level. The porous implant prepared by the method disclosed by the invention can effectively relieve the'stress shielding 'effect of a traditional compact implant so as to improve the interfacial osseointegration performance and the long-term stability of implantation of the implant.

This invention provides an interbody fusion device and its preparation method, comprising: metal endplates symmetrically arranged vertically, with a mesh structure on the surface of the metal endplates, the mesh structure including: a bone mesh on the outer surface of the metal endplates, a coupling mesh on the inner surface of the metal endplates, a metal separator layer fixedly disposed between the bone mesh and the coupling mesh, and a linkage locking seat disposed on the inner surface of the metal endplates; a cable passing through the linkage locking seat on the inner surface of the aforementioned metal endplates; a polymer matrix fixed between the aforementioned pair of metal endplates by the aforementioned shear-resistant structure; a bone graft cavity, which is a cavity jointly formed by the metal endplates and the polymer matrix; and a positioning hole penetrating the aforementioned polymer matrix. This application addresses the technical problems that, with prolonged implantation time, complications such as displacement, coating peeling, settlement, stress shielding, bone resorption in adjacent areas, and delayed inflammatory reactions often occur.

The invention discloses a porous scaffold SLM preparation method and device based on machine learning, and belongs to the technical field of additive manufacturing. The method comprises the following steps: firstly, designing a composite lattice porous structure consisting of inner-layer simple cubic cells and outer-layer body-centered cubic cells, wherein the inner-layer simple cubic cells and the outer-layer body-centered cubic cells are directly connected through nodes; then, a Latin hypercube sampling design test scheme is adopted, and initial small sample data of the selective laser melting process are obtained; then, a regression synthesis minority class oversampling technology is introduced to carry out enhancement processing on the data set; on the basis, establishing a kernel extreme learning machine prediction model optimized by a swarm intelligence algorithm; and finally, reversely solving optimal process parameters based on the target performance and completing preparation. Through the composite structure design, the stress shielding effect is effectively relieved, the problems of high experiment cost, less sample data and low prediction precision in traditional process optimization are solved, and efficient and accurate customized manufacturing of the high-performance medical CoCrMo implant is achieved.

The present invention provides an artificial skeletal joint and a preparation method thereof, wherein the artificial skeletal joint comprises a skeletal joint body, a first micro-arc oxidation film layer, and a second micro-arc oxidation film layer; the skeletal joint body is made of a titanium alloy; the first micro-arc oxidation film layer is disposed on the joint movable surface of the skeletal joint body, and the second micro-arc oxidation film layer is disposed on the human bone contact surface of the skeletal joint body. The above-mentioned artificial skeletal joint adopts a double-surface treatment method to modify the surface of the titanium alloy skeletal joint body, and performs a micro-arc oxidation process strengthening treatment on the joint movable surface to prepare a first micro-arc oxidation film layer with high hardness, high elastic modulus, and low friction coefficient. The human bone contact surface is subjected to a micro-arc oxidation roughening treatment to prepare a second micro-arc oxidation film layer with low elastic modulus and biocompatibility, thereby meeting the requirements of different characteristics of different positions of the artificial skeletal joint and improving wear and stress shielding of bone tissue.

A self-adaptive bionic cancellous bone defect prosthesis and a design method thereof belong to the technical field of medical prostheses. The prosthesis consists of a bio-interface gradient microporous structure portion and a main bionic truss support structure portion. The bio-interface gradient microporous structure portion is arranged at both ends of the main bionic truss support structure portion and is mainly used to reconstruct bone defects. Through the established linear relationship between CT grayscale value and bone density-elastic modulus, the main truss portion is bionicly designed with the same arrangement direction and morphology as human trabeculae, adaptively matching the mechanical conduction of the bone structure, reducing the stress shielding effect, and simultaneously matching the prosthesis's various complex mechanical working conditions, reducing the risk of prosthesis failure, and extending the prosthesis's service life.

The dynamic implant fixation plate and implant configured to accept the disclosed fixation plate can, in some aspects, provide a means of fixing an implant relative one or more planes while allowing motion relative to one or more planes. The use of the disclosed fixation plate and corresponding implant can reduce the occurrence of stress shielding and permit enhanced loading of the implant site.

This invention discloses a novel adjustable intramedullary nail, comprising a hollow main nail, a proximal end of the nail, and a main body of the nail, which are integrally formed. The diameter of the proximal end of the nail is larger than that of the main body. Multiple through-holes for dynamic screws are provided at the proximal end of the nail. An adjustment hole is provided on the main body of the nail, away from the proximal end. A dynamic bone screw is installed in each of the dynamic screw holes and can move axially along the holes. A tail cap is installed on the proximal side of the nail, and an elastomer is placed between the tail cap and the dynamic bone screw. An absorbable washer is placed distal to the dynamic bone screw to support it. An adjustment device for adjusting the stress at the fracture ends is provided on the main body of the nail, which can adjust the stress at the fracture ends according to the specific fracture conditions, avoid stress shielding at the fracture ends, accelerate fracture healing, reduce delayed healing and nonunion, and decrease the incidence of refracture after removal of the intramedullary nail.

The utility model discloses a device for promoting wound healing, which comprises a limiting ring and a healing ring which are both of an oval structure. The inner ring of the limiting ring is of a step structure, and a limiting groove of an annular structure is formed in the step. The healing ring comprises an outer ring, the outer ring is embedded into the limiting groove, the outer ring and the limiting groove are in clearance fit, the outer ring is located in the limiting groove to rotate, a pair of connecting strips are arranged at the two ends of the interior of the outer ring in the length direction, a plurality of elastic rings of oval structures are arranged between the outer sides of the connecting strips, and closed rings are arranged on the opposite faces of the connecting strips. According to the utility model, micro-stress is applied to the wound area, the gap of the wound area is reduced and controlled, stress shielding of the wound area is realized through the structure on the outer side, and the influence of stress strain generated by body movement and movement of other parts of the body on calluses is reduced; it is ensured that cell proliferation and tissue repair are stably carried out in a stable state in the wound healing stage.

The invention discloses a method and a system for determining the elastic modulus of an internal fixation block for fracture, and relates to the field of medical instruments, and the method comprises the following steps: building a parameterized biomechanical model, extracting features from the parameterized biomechanical model, and selecting the elastic modulus of the internal fixation block based on a gradient boosting decision tree model. An artificial intelligence algorithm combined with pathological state correction is used for accurately determining the elastic modulus required by the fracture internal fixation block, and the elastic modulus is creatively fused into the physiological state index of a patient to dynamically adjust the weight coefficient. Objective customization of personalized elastic modulus is achieved, it is ensured that the internal fixing block is highly matched with the bone mechanical property of a patient, stress conduction and distribution of a bone fixing interface are effectively optimized, the stress shielding risk is reduced to the maximum extent, fracture healing quality and speed are remarkably improved, complications are reduced, and fixing stability and long-term curative effect are improved. The system is a key breakthrough for intelligent and precise orthopaedic treatment.

The invention discloses a self-fixing porous acetabular cup cushion block, and particularly relates to the technical field of medical instruments.The self-fixing porous acetabular cup cushion block comprises a cushion block body and limiting supporting lugs, the cushion block body comprises a concave curved surface used for being attached to the outer surface of an acetabular cup and a convex curved surface used for being in contact with an acetabular fossa, and the limiting supporting lugs are arranged on the convex curved surface; the plurality of limiting support lugs are distributed at equal intervals along the periphery of the convex curved surface; the cushion block body and the limiting supporting lugs are each of a porous structure. By means of over-tight fit of the limiting support lugs and the support lug mounting holes, extrusion and fitting of porous structures of the limiting support lugs and porous structures of bone tissue trabecula and large-area multidirectional mechanical interlocking, displacement of the cushion block body is prevented, micro-motion is greatly reduced, and the implantation precision and initial stability of the cushion block body are improved; the porous structure is utilized, stress is effectively dispersed and conducted, stress shielding is eliminated, biomechanical stimulation is enhanced, bone tissue ingrowth is promoted, regenerative biological fusion of the cushion block body is achieved, and lifelong biological fixation of the cushion block body is guaranteed.

The present invention relates to a method for interactively designing via an implant design platform an artificial joint implant for hip arthroplasty and corresponding broaching and osteotomy guide apparatuses. The proposed implant design platform reconstructs the anatomy of the patient's pelvic and femoral bones in a 3D digital environment, and accordingly develops a patient-specific femoral implant stem as well as patient-specific surgical tools broach / rasp, osteotomy guide) used in total 10 hip arthroplasty. The patient-specific femoral implant stem developed may be optimized to ensure optimum mechanical performance for the patient, employing complex internal lattices that minimize stress shielding and advanced trabecular surfaces to promote osseointegration.