102 results about "Bone length" patented technology

The invention relates to the technical field of medical instruments, and discloses an additive manufacturing bionic bone trabecula full-porous interbody fusion cage which is applied to spinal fusion surgery and is of a bionic bone trabecula full-porous structure made of medical metal through a laser melting or electron beam melting additive manufacturing technology. The interbody fusion cage comprises a front end face, a rear end face, a first side surface, a second side surface, an upper fusion face and a lower fusion face, the upper fusion face and the lower fusion face make direct contact with a vertebral body end plate of a spine, anti-skid teeth are arranged on the surfaces of the upper fusion face and the lower fusion face, and a bone grafting window penetrating through the upper fusion face and the lower fusion face is formed in the center of the interbody fusion cage. The interbody fusion cage has the structure and mechanical property similar to those of cancellous bone and trabecular bone of a human body, can improve the bone combination area and bone ingrowth space, has excellent initial and long-term stability, and can effectively reduce stress shielding so as to improve the bone fusion capability.

The invention discloses a three-dimensional human body posture estimation method and system, and relates to the technical field of computer vision, and the method comprises the steps: extracting two-dimensional human body posture key points from a monocular video picture sequence, and generating a two-dimensional human body posture key point sequence; projecting the two-dimensional key point sequence to a feature space through nonlinear high-dimensional mapping to generate a high-dimensional feature space matrix; and inputting the high-dimensional feature matrix into a three-dimensional human body posture recognition model fusing motion constraints and frequency division spatial-temporal features to obtain a three-dimensional human body posture key point sequence, and realizing three-dimensional human body posture estimation through three-dimensional coordinates. According to the method, the robustness and the detection precision of the monocular three-dimensional human body posture estimation method are improved. Error values of relative movement speed, skeleton length and skeleton direction of the key points are calculated, so that training is easier to converge, and the training process is more stable.

The invention discloses a preparation method of a bionic bone replacement prosthesis based on a TPMS (Tire Pressure Monitor System) structure and the replacement prosthesis, and relates to a bone prosthesis technology, the preparation method comprises the following steps: S1, based on the structural information of a host femoral head, obtaining the specification and size of each part structure, and establishing a three-dimensional prosthesis model; s2, an alloy material is selected, and a tail end support is prepared through hollow design and trepanning; s3, constructing a bone scaffold matched with the mechanical structure trend of the host bone trabecula by designing a three-period small curved surface structure and adjusting functional parameters, and obtaining a hollow prosthesis by assembling an end face connecting structure; s4, selecting a multi-layer bionic cartilage material, and preparing an outer cartilage cup by matching the multi-layer bionic cartilage material with the surface radian of the femoral head of the host; and S5, the structures of all the parts are assembled and embedded according to the sequence, and cross bolts are embedded. The hollow-out design with sparse inside and dense outside is adopted, so that the prosthesis transmits load more uniformly, stress of surrounding bones is relieved, and bone ingrowth is promoted.

The invention relates to the technical field of skull repair, and discloses a personalized 3D printing porous composite hydroxyapatite coating skull repair body which comprises a truss structure, a plurality of porous areas are distributed on the truss structure, bionic bone trabecula structures are integrally formed in the porous areas, the truss structure is composed of hollow pipes communicating with one another, and the hollow pipes communicate with one another. A plurality of small holes and micro holes which are communicated with the interior of the hollow pipe are formed in the hollow pipe, and a composite coating of a hydroxyapatite coating and titanium is sprayed on the porous area; the invention provides a personalized 3D printed skull restoration with a porous composite hydroxyapatite coating. The problem that the biocompatibility, the bone induction capability and the bone ingrowth effect of an existing skull restoration need to be improved is solved.

A bone insert includes a cap having a convex top surface, an elongated stem, and a barrier between the cap and the stem. The stem of the bone insert is inserted into a hole formed in a host bone until the barrier is pressed against the exposed bone. The bone implant can be placed against a small focus contact point on the cap. Liquid cement can be injected into a space volume between the host bone and a bone implant. The cap can be made of a material and / or have surface features that create a strong bond with the cement when the liquid cement cures. The stem can be made of a material and / or have bone ingrowth surface features that create a strong bond with the bone.

The invention provides an unmarked action acquisition and analysis method and system, and the method comprises the steps: recognizing static and dynamic 2D key points according to the static and dynamic image data of a tester, and reconstructing the static and dynamic 2D key points into static and dynamic 3D key points; based on the static 3D key points, calculating and optimizing the skeleton length, and performing scaling adjustment on the standard skeleton and muscle model to obtain a static skeleton and muscle model of the testee; estimating skeleton motion attitude information according to the original and optimized dynamic 3D key points, and matching the skeleton motion attitude information to a static skeleton and muscle model of a tester to perform inverse kinematics analysis; estimating ground support force GRF of left and right feet by using an inverse kinematics analysis result based on a dynamic balance relationship of human motion; on the basis of an inverse kinematics analysis result and ground support force GRF estimated values of the left and right feet, counter-acting force and torque required by each joint of the human body are calculated frame by frame by adopting an inverse kinematics method of a rigid body system, and then muscle strength and activation degree are calculated. According to the invention, unmarked action acquisition and analysis can be carried out.

The invention provides a 3D human body posture estimation method based on a diffusion model and continuous frame time-frequency information fusion, and the method comprises the steps: inputting a 2D posture into an initial estimator for posture extraction, and obtaining an initial 3D human body posture; inputting the initial 3D human body posture into a diffusion model in an iteration form, and training in combination with noise to obtain an optimized 3D human body posture; performing mechanism processing on the long sequence data of the 3D human body skeleton by using an encoder of a space Transform module and a time frequency domain fusion module to obtain encoding features, and performing mechanism processing on the long sequence data of the 3D human body skeleton by using the time frequency domain fusion module; and the coding features are input into the time-frequency feature fusion module for mechanism processing, so that the accuracy of attitude estimation is improved. According to the method, the initial estimator is used for integrating constraints such as the bone length consistency and the joint connection relation, and fuzziness and ambiguity in 2D-3D inference can be reduced.

The invention relates to a hip joint prosthesis. The hip joint prosthesis comprises an interstitial acetabular prosthesis and a femoral head reconstruction device. The interstitial acetabular prosthesis is stably connected with a pelvic acetabular fossa through the interstitial acetabular cup, the fixing screw and the interstitial acetabular lining, and adaptability and stability are enhanced through multiple designs such as petal openings and damping parts; the femoral head reconstruction device comprises a joint friction surface prosthesis and a bone ingrowth supporting cage frame, and reconstruction and stable supporting of the femoral head are achieved. According to the hip joint prosthesis, the technical effects of improving the stability and durability of the hip joint prosthesis, reducing postoperative discomfort of a patient and promoting bone tissue growth are achieved.

The embodiment of the invention provides a virtual character display method and device, equipment, a medium and a program, a virtual character is displayed by obtaining a limb image of a human body, determining the skeleton length of a corresponding human body limb according to the limb image, and the limb skeleton length of the virtual character is determined according to the skeleton length of the human body limb. According to the method, the skeleton length of the human limb can be automatically detected, the limb skeleton length of the virtual character is adjusted according to the skeleton length of the human limb, flexible adjustment of the limb skeleton length of the virtual character is realized, and the user experience is improved.

The spine implant comprises a frame body and a porous structure, the frame body comprises a first end and a second end which are opposite to each other, a cavity is formed in the frame body, and the cavity penetrates through the frame body in the direction from the first end to the second end; the porous structure comprises a first porous part, the first porous part is contained in the cavity and connected with the frame body, the first porous part comprises a first part, a second part and a third part which are sequentially distributed from the first end to the second end, and the porosity of the first part and the porosity of the third part are both larger than the porosity of the second part. According to the embodiment of the invention, the first part, the second part and the third part of the porous structure of the spine implant are sequentially distributed in the direction from the first end to the second end of the frame body, and the porosity of the first part and the porosity of the third part are greater than that of the second part, so that stress shielding of the spine implant can be reduced; the bone ingrowth performance of the bone is improved, and the risk that the middle of the spine implant is broken is reduced.

An implant assembly for a long bone is adapted to support an exo-prosthesis. The assembly includes a stem, a subdermal component and a percutaneous post. The stem has a proximal end that is adapted to be received in a surgically prepared medullary canal of the long bone, and a distal end having a surface that is adapted to promote bone ingrowth. The subdermal component includes a proximal portion that is adapted for attachment to the distal end of the stem, and a fixation surface that is adapted to promote soft tissue fixation. The percutaneous post has a proximal end that is adapted to be attached to the subdermal component.

A bone insert includes a cap having a convex top surface, an elongated stem, and a barrier between the cap and the stem. The stem of the bone insert is inserted into a hole formed in a host bone until the barrier is pressed against the exposed bone. The bone implant can be placed against a small focus contact point on the cap. Liquid cement can be injected into a space volume between the host bone and a bone implant. The cap can be made of a material and / or have surface features that create a strong bond with the cement when the liquid cement cures. The stem can be made of a material and / or have bone ingrowth surface features that create a strong bond with the bone.

The invention discloses an idiopathic knee joint deformity correction method based on combination of growth curve prediction and absorbable material time gradient regulation and control, and is applied to the technical field of biomedical materials. Comprising the following steps: acquiring lower limb bone length data of a normal child, and drawing a growth curve; constructing and fitting a lower limb bone length model by using the growth curve data, and constructing a mathematical model for correcting idiopathic knee varus and valgus; constructing a prediction model to calculate the time of implanting the child patient with idiopathic genu varum into the steel plate for fixation during the semi-epiphyseal fixation; the absorbable zinc-magnesium alloy internal fixation nail plate with different in-vivo absorption time gradients is developed; the zinc-magnesium alloy internal fixation nail plate with the corresponding absorption time is selected for correction according to the time required by different child patients to be implanted into the steel plate for fixation. After a child patient receives a semi-epiphyseal block operation to achieve the correction effect, the internal fixation steel plate can be automatically absorbed and broken, the operation of taking out internal fixation again is omitted, the operation risk and pain are reduced, and the treatment cost is reduced.

The present application relates to the technical field of prosthetic reconstruction of adjacent joint bone defects, and in particular to an intramedullary axial pressure fixation prosthesis for metaphyseal bone defects. The key points of its technical solution are: it includes a pressure rod and a fixing member for fixing the position of the pressure rod, the pressure rod extends into a fixing handle, a pressure tail cap threadedly connected to the pressure rod is arranged inside the fixing handle, a nut hole for inserting the pressure tail cap is opened on the fixing handle, the pressure tail cap abuts against the bottom of the nut hole and can rotate inside the nut hole; the purpose of exerting mutual pressure between the prosthesis and the retained bone is achieved, thereby promoting the bone ingrowth effect and making the connection between the two more stable in the early postoperative period.

The utility model discloses a bionic movement intervertebral fusion replacement device, and relates to the technical field of medical instruments. In order to solve the problem that an existing fusion cage does not move relatively and does not conform to normal physiological characteristics of human beings, the following technical scheme is provided: the fusion cage comprises an upper fusion body, a lower fusion body and a lining, the bottom of the upper fusion body is rotatably connected with the top of the lining, and the lining is detachably connected to the top of the lower fusion body. A groove is formed in the bottom of the upper fusion body, the shape of the groove is matched with the shape of the top of the lining, the top of the lining is of an arc-shaped structure, porous structures are arranged at the top of the upper fusion body and the bottom of the lower fusion body respectively, and barb structures are arranged at the top of the upper fusion body and the top of the lower fusion body. The side end of the lower fusion body is provided with a rotary outer blocking piece, and a bolt locking lining is arranged outside the rotary outer blocking piece. The defect that the fusion cage cannot move relatively can be overcome, normal physiological characteristics of human beings are better met, and meanwhile sufficient supporting force and bone ingrowth capacity are achieved.

The application discloses a 3D-printed intervertebral fusion cage, which is used to solve the problem of poor bone ingrowth effect of the prior art fusion cage, slow degradation speed, and early release of active ingredients, and the structure comprises a frame and an embedded pipe, the embedded pipe is arranged in the frame, the components are all made of degradable metal materials and can be gradually degraded in the human body, the embedded pipe is further encapsulated with active ingredients for promoting bone growth, and the active ingredients are released with the degradation of the embedded pipe, so that the early release of the drugs in the embedded pipe is avoided, long-acting effect is achieved, and of course a net beam is arranged in the gap of the frame, and the porous structure formed by the net beam further increases the bone ingrowth effect; the application creatively uses a 3D process to realize the encapsulation of the active ingredients and the forming of the porous support, and is combined with the degradable metal to realize the sustained release, so that a good growth condition is provided for the bone ingrowth in the porous support, the effect of the growth factors is fully played, and the treatment effect is improved.

The invention provides an individualized tibia defect repairing type knee joint prosthesis, and belongs to the technical field of orthopedic implants. The device is formed by assembling a femoral condyle, a femoral bone marrow needle, a plateau pad, a tibia plateau, a restoration body and a tibia bone marrow needle. Wherein the tibia platform and the restoration body are matched through metal-metal threads and are assisted by bone cement to achieve anti-rotation locking, the restoration body adopts a 3D printing individualized bone trabecula structure and is compounded with an HA coating to promote bone ingrowth, the tibia bone marrow needle and the platform are connected through a standard taper connector, inventory and individualization compatibility is achieved, and the bone marrow needle and the platform are connected through a standard taper connector. The defects that an existing prosthesis is large in bone mass loss, unattractive in reconstruction, free of bone ingrowth function, high in processing cost and the like are overcome, and the postoperative function of a tibia defect patient and the long-term stability of the prosthesis can be remarkably improved.

The application relates to a hip joint prosthesis, which comprises an interposition acetabulum prosthesis and a femoral head reconstruction device. The interposition acetabulum prosthesis is connected with the acetabular fossa of the pelvis stably through an interposition acetabulum cup, a fixing screw and an interposition acetabulum liner, and the adaptability and stability are enhanced through multiple designs such as petal opening and damping parts; the femoral head reconstruction device comprises a joint friction surface prosthesis and a bone ingrowth support cage, and the reconstruction and stable support of the femoral head are realized. The application achieves the technical effects of improving the stability and durability of the hip joint prosthesis, reducing the postoperative discomfort of patients and promoting the growth of bone tissue.

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 utility model discloses a mixed fixing type joint prosthesis assembly, belongs to the technical field of joint prostheses, and is designed for solving the problems that a joint prosthesis in the prior art is loosened and even falls off and the like. The utility model discloses a mixed fixing type joint prosthesis assembly which comprises a joint prosthesis which is an arc-shaped face, and the inner concave face of the joint prosthesis comprises a posterior condyle area and a main body area. The biological material layer covers at least part of the posterior condyle area, and the biological material layer is used for forming bone ingrowth between the biological material layer and the to-be-connected bone. According to the mixed fixing type joint prosthesis assembly, the stability of connection is improved through bone ingrowth formed between the biological material layer and the skeleton to be connected, and the problem that in the prior art, bone cement in the posterior condyle area cannot reach the effective penetration depth, and consequently a joint prosthesis is loosened and even falls off from the skeleton of the human body is solved; connection between the joint prosthesis assembly and the to-be-connected skeleton is more stable, and the use experience is better.

The application discloses a monocular three-dimensional human pose estimation method fusing part perception and bone topology prior, and belongs to the field of computer vision. The application aims to solve the problem that existing methods ignore human motion heterogeneity and lack explicit anatomical constraints. The method comprises the following steps: obtaining 2D joint coordinates of a monocular video sequence and generating initial features; extracting features by using a parallel double-path time attention mechanism, wherein a global path captures overall motion, and a local path independently models features divided into five semantic component groups, and a cross-part graph convolution network is used to capture limb coordination, and two features are fused through an adaptive gating unit; and finally, features are transformed to a bone domain through a bone structure refining module, a graph convolution network is used to explicitly correct bone length and connection relationship based on a topology structure, and a refined three-dimensional pose is generated. The application enhances the physical rationality and accuracy of the predicted pose.

Systems, methods, and devices for bony fusion are disclosed. A threaded cannulated implant may be inserted into a target space, such as in the sacroiliac joint. The implant may have a distal section, a proximal section, and a central section between the distal section and the proximal section. The distal section may comprise cutting threads and flutes for self-drilling the implant into bone. The proximal section may be configured to couple to an insertion instrument for the implant. The central section may have a lattice structure through which bone graft may flow to promote bone ingrowth. A solid core region may be located inwards from the lattice structure. The central section may also have openings through the core region to connect the lattice structure to the cannula.

There is a fixation device for promoting fusion and / or osteosynthesis of a first bone segment and a second bone segment, comprising a bone plate portion including an outer surface, an inner surface and at least one fixation aperture extending from the outer surface to the inner surface and a bone wedge portion extending from the plate portion at a first end and a free opposite end, the bone wedge portion comprising a porous architecture configured to promote bone ingrowth, the wedge portion defining first and second engagement surfaces for engaging the first bone segment and a second bone segment, respectively. There is also a method of manufacturing a fixation device for promoting fusion and / or osteosynthesis of a first bone segment and a second bone segment, a method of promoting fusion and / or osteosynthesis of a first bone segment and a second bone segment, and a fixation kit.

The present invention discloses a method for generating a trabecular porous structure model based on cancellous bone micro-CT and preparing a trabecular porous structure, and relates to the field of biomedical technology. A specific implementation of the method for generating a trabecular porous structure model based on cancellous bone micro-CT includes: scanning the cancellous bone based on micro-CT to obtain a three-dimensional image of the cancellous bone; determining the position of the cavity of the cancellous bone according to the gray value of each point in the three-dimensional image; and generating a trabecular porous structure model based on the Voronoi algorithm according to the cavity position. This implementation can reproduce the microstructure, density distribution, mass transfer characteristics and biological properties of the bone, and at the same time has good mechanical properties and bone ingrowth properties.

The utility model relates to a bone filling prosthesis for treating local bone defects of knee joints, which comprises a prosthesis body, the prosthesis body is arranged to be a conical truncated cone column convenient for implanting the prosthesis body into cancellous bone, the prosthesis body forms a bone trabecula structure, and the prosthesis body is provided with a plurality of pores; the prosthesis body is of a conical truncated cone structure formed by a truncated cone column, and the prosthesis body can be conveniently implanted into the cancellous bone through the end, facing the taper angle side, of the prosthesis body. In the implanting process, the device can also form good press fit with the cancellous bone, the cancellous bone is further tamped, and good initial stability and bone ingrowth conditions are provided; the bone trabecula structure formed by the prosthesis body is beneficial to the ingrowth of new bone tissues, the integration of the prosthesis and surrounding bone tissues is promoted, and good biological reconstruction can be carried out on local bone defects of the knee joint.

The utility model relates to the technical field of medical equipment, and discloses a double-bone fracture plate for femoral supracondylar fracture, which comprises a double-bone fracture plate, one end of the double-bone fracture plate is connected with a fixing block, two sides of the fixing block are provided with sliding blocks, the outer sides of the sliding blocks are sleeved with adjusting blocks, the adjusting blocks are provided with sliding grooves at positions corresponding to the sliding blocks, and the sliding blocks are connected with the double-bone fracture plate. A spring is connected to one side of the fixing block, a fixing screw hole is formed in the surface of the double bone fracture plate, a connecting groove is formed in one side of the fixing screw hole, auxiliary fixing screw holes are formed in the positions, around the fixing screw hole, of the double bone fracture plate, and a pressure relief groove is formed in the lower end of the double bone fracture plate. By adjusting the positions of the double bone fracture plates which are symmetrically arranged, the bone fracture plate is convenient to adapt to treatment conditions with different bone lengths, the practicability is improved to a certain extent, a doctor is more flexible in surgical operation, and real-time adjustment can be carried out according to actual conditions.

The application discloses a three-dimensional human posture estimation method and system, relates to the technical field of computer vision, and comprises the following steps: extracting two-dimensional human posture key points from a monocular video picture sequence, and generating a two-dimensional human posture key point sequence; projecting the two-dimensional key point sequence to a feature space through nonlinear high-dimensional mapping, and generating a high-dimensional feature space matrix; inputting the high-dimensional feature matrix into a three-dimensional human posture recognition model which fuses motion constraints and frequency division space-time features, obtaining a three-dimensional human posture key point sequence, and realizing three-dimensional human posture estimation through three-dimensional coordinates. The method improves the robustness and detection precision of the monocular three-dimensional human posture estimation method. Error values are calculated for the relative motion speed, bone length and bone direction of the key points, so that the training is easier to converge and the training process is more stable.

The invention discloses an additive-manufactured biological tibia tray prosthesis and a manufacturing method thereof, and relates to the technical field of artificial knee joint prostheses. The biological type tibia support prosthesis comprises four types: a biological type symmetrical tibia support, a biological type symmetrical stemless tibia support, a biological type anatomical tibia support and a biological type anatomical stemless tibia support. The prosthesis mainly comprises a support body, a porous structure, a plug pin and the like, and is integrally formed through an additive manufacturing technology, so that the precision and the strength are ensured. The porous structure is designed to be in an irregular space three-dimensional grid shape, the thickness ranges from 0.6 mm to 1.6 mm, and the porous structure is used for promoting bone trabecula ingrowth and achieving biological fixation. The positioning nail adopts a bullet-shaped design and is provided with an exhaust groove and a notch, so that the installation is simplified and the stability is enhanced. The manufacturing method comprises the steps of design modeling, stress optimization, additive manufacturing and aftertreatment, and the prosthesis is made of a titanium alloy material and meets related international standards. The invention has the advantages of simple installation, reliable fixation, good bone ingrowth effect and the like.

The utility model relates to the technical field of medical instruments, and discloses a full-porous cervical vertebra fusion cage which comprises a machining area and a porous area. The machining area is provided with a threaded hole for leading in a surgical instrument; the porous area comprises an upper surface, a lower surface, a front surface, a rear surface and two side surfaces; and the upper surface and the lower surface are provided with anti-skid surfaces. The threaded hole in the machining area is used for being matched with a surgical instrument matched with the threaded hole, and surgical implantation is facilitated. The porous area provides more growth space for cells, adhesion, migration, proliferation and differentiation of the cells are facilitated, and finally the bone ingrowth effect is achieved. The full-porous cervical vertebra fusion cage has the mechanical property matched with the human body structure and good biocompatibility, can form a tight bonding interface with the human body tissue, improves the combination stability of the fusion cage and the human body tissue, has the mechanical property matched with the human body tissue, and can be applied to clinical treatment of cervical degenerative diseases.

The present invention discloses a cervical fusion device, which is made of porous tantalum; the structure of the cervical fusion device is a box-type structure; the upper surface of the cervical fusion device is convex, and the lower surface is straight; the cervical fusion device includes a central part and a peripheral wall, the central part is arranged in the middle of the cervical fusion device, and the peripheral wall is arranged around the central part; the peripheral wall is made of porous tantalum with a porosity of 20%-30%; the central part is made of porous tantalum with a porosity of 70%-80%; the central part of the cervical fusion device is provided with vertically retractable barbs. The cervical fusion device provided by the present invention does not require bone grafting, has no bone grafting area, and avoids complications related to bone grafting; it is made of porous tantalum material. Porous tantalum, also known as trabecular metal, has a three-dimensional structure with interconnected pores similar to human cancellous bone, has a high porosity, can promote the exchange of nutrients in the pores, is more conducive to bone ingrowth, promotes bone integration, and increases the fusion rate.