83 results about "Bone length" patented technology

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.

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 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 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 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 invention discloses a low-incisura cervical vertebra fusion cage, and belongs to the field of orthopedic medical instruments. The fusion cage comprises a fusion cage body and a nail plate assembly, the fusion cage body comprises a top supporting plate, a bottom supporting plate and a porous structure, the space between the top supporting plate and the bottom supporting plate is filled with the porous structure, the fusion cage body is provided with a bone grafting bin penetrating through the top supporting plate, the porous structure and the bottom supporting plate, and the bone grafting bin communicates with the porous structure; the fusion cage body is provided with an implantation front end and an implantation rear end, the implantation rear end is provided with a connecting plate mechanism, the nail plate assembly is fixedly arranged at the implantation rear end of the fusion cage body through the connecting plate mechanism, and the nail plate assembly and the fusion cage body are detachably arranged. The intervertebral fusion device is reasonable in structural design, smooth and efficient in implantation operation, stable and firm in implantation use, good in bone ingrowth effect and short in postoperative recovery period of a patient, postoperative complications of the patient can be effectively reduced, and the use requirement of intervertebral fusion is met.

The skeletal recognition device of the present invention inputs teacher data into a learning model and calculates an output based on forward propagation. The skeletal recognition device calculates the value of a loss function based on the difference in bone length between the skeletal information (which is the forward solution value based on the teacher data) and the output of the recognition processing unit, and the difference in the angles between the bones based on the skeletal information and the output of the recognition processing unit.

The invention discloses a tantalum coating 3D printing acetabular cup-acetabular cushion block system, and belongs to the technical field of medical prostheses. The acetabular cushion block and the acetabular cup are firmly combined with the hip bone through screws, and the porous tantalum coating promotes bone ingrowth and achieves a better biological fixation effect. The radian of the acetabular cushion block is customized according to the bone defect position of a patient, the combination position of the acetabular cushion block and the acetabular cup can be selected, the angle can be flexibly adjusted, the acetabular cushion block is combined with the acetabular cup through a bottom adjustable lock catch, a self-locking structure is arranged, and uneven stress of the acetabular cup caused by looseness is prevented.

The invention relates to an intelligent fusion cage for lumbar malformation correction, and relates to the technical field of medical instruments, the intelligent fusion cage is formed by fixedly connecting three main frame bodies side by side, the upper end and the lower end of each main frame body are fixedly connected with a supporting body, the upper surface of each supporting body is of a wave-shaped structure and is composed of a plurality of convex bodies, the wave crests of each convex body are fixedly connected with antibiotic microspheres, and the wave troughs of each convex body are provided with BMP-2 slow-release gel; a relieving bag is fixedly connected into the supporting body, one end of the relieving bag is of a frustum-shaped structure, and the central point ratio CPR of the fusion cage is larger than or equal to 50% when the fusion cage is implanted; convex holes are annularly formed in the upper and lower surfaces of the main frame body, VEGF nano-liposomes are placed in the main frame body, permeation holes I with honeycomb structures are formed in the two side ends of the main frame body, and permeation holes II communicated with the interlayer channels are formed in the main frame body close to the bottom joint of the support body; the support body and the relieving capsule are composed of a PLGA / silk fibroin / nHA compound, the main frame body is Mg-Zn-Sr alloy, and the alloy is degraded to release ions to promote new bone ingrowth.

This invention relates to the field of veterinary medical device technology, and more particularly to a high-performance orthopedic implant for veterinary use and its preparation method. The method includes: preparing a solid external structure using additive manufacturing technology with a matrix material, and preparing a three-dimensional porous structure for the bone contact area on the solid external structure; preparing a micromaterial layer on the three-dimensional porous structure for the bone contact area using PVD technology, thereby obtaining the high-performance orthopedic implant for veterinary use. The preparation method of this invention combines additive manufacturing with technologies such as spraying, PVD, and laser sintering, employing cold spraying combined with laser sintering to overcome the non-metallurgical bonding defects of pure cold spray coatings, improving bonding strength and implant lifespan. The prepared implant possesses high mechanical strength, precise three-dimensional porosity, suitable elastic modulus, and good biocompatibility and osteoinductive properties. Through the synergistic effect achieved by the microporous structure and multi-material composite, excellent bone ingrowth can still be achieved even in cases of bone cell infarction.

The utility model provides a full-porous spine fusion cage with an extremely-small curved surface structure, and belongs to the technical field of medical instruments. The utility model comprises an extremely small curved surface porous structure which is a three-period spiral curved surface; the bone grafting windows are arranged on the pair of cambered surfaces of the extremely-small-curved-surface full-porous structure and are used in cooperation with bone grafting; and the instrument clamping area is arranged in the middle of the bottom surface of the extremely-small-curved-surface porous structure, is communicated with the bone grafting window and is used for clamping the spinal fusion cage by an instrument. According to the utility model, an extremely small curved surface porous structure formed by a three-period spiral curved surface is adopted, the comprehensive mechanical property is excellent, and the static compression strength and the fatigue strength are improved by more than 50%; the matching degree of the elasticity modulus and the human skeleton is high, the stress load is uniformly distributed, the mechanical reliability is high, and the anti-fatigue capability is strong; no compact solid part exists, so that the contact area with bones and the bone tissue ingrowth space are increased; blood is rapidly sucked into the pore channel through the capillary effect, bone fusion and vascularization are facilitated, and bone conduction, bone fusion and bone ingrowth performance is outstanding.

The invention discloses a bone loss repairing device which comprises a repairing part, the repairing part serves as a metal implant and uses titanium alloy as a main material, extension assemblies are installed on the top wall and the bottom wall of the repairing part, a porous assembly is installed in the repairing part, and a plurality of fixing assemblies are evenly installed on the edge of the outer wall of the repairing part. The outer edge positions of the top wall and the bottom wall of the repairing piece are each provided with a release assembly. The porous assembly comprises outer wall holes, the multiple outer wall holes are evenly formed in the top wall of the repair part, and multiple inner wall holes are evenly formed in the bottom wall of the repair part. According to the bone deficiency repairing device, through the arrangement of the porous assembly and the multi-gradient aperture gradient change, the elastic modulus and the stress shielding effect can be reduced, bone tissue is approached, bone can grow into inner wall holes conveniently, meanwhile, the internal strength of an implant is increased, biocompatibility is good, rejection reaction is reduced, and bone ingrowth is promoted through the porous structure.

This invention provides a label-free motion capture and analysis method and system, comprising: identifying static and dynamic 2D keypoints based on static and dynamic image data of the test subject, and then reconstructing them into static and dynamic 3D keypoints; calculating and optimizing bone length based on the static 3D keypoints, and then scaling and adjusting a standard bone and muscle model to obtain a static bone and muscle model of the test subject; estimating bone movement posture information based on the original and optimized dynamic 3D keypoints, and matching it to the static bone and muscle model of the test subject for inverse kinematics analysis; estimating the ground support force (GRF) of the left and right feet based on the dynamic balance relationship of human movement using the results of the inverse kinematics analysis; and using the inverse kinematics analysis results and the estimated GRF values ​​of the ground support force of the left and right feet, calculating the required reaction force and torque of each joint of the human body frame by frame using the inverse dynamics method of rigid body systems, and then calculating muscle strength and activation level. This invention enables label-free motion capture and analysis.