59 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.

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.

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 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 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.

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.

The application provides an intervertebral fusion prosthesis and an intervertebral fusion prosthesis assembly, the intervertebral fusion prosthesis comprising: an outer shell, the outer shell being provided with a first conduction nail hole; a first bone conduction nail, the first bone conduction nail being arranged in the first conduction nail hole and extending out of the outer shell, the first bone conduction nail comprising a first connecting head, a first nail barrel and a first bone conduction body arranged in the first nail barrel, the outer side wall of the first nail barrel being provided with a first threaded structure, the first connecting head being provided with a first butt joint groove and the first butt joint groove being communicated with the accommodating cavity; a first adjusting body being provided with a first bone conduction block; a second bone conduction body being arranged in the first connecting barrel, the first connecting barrel extending into the first bone conduction block, and the end of the first connecting barrel being inserted into the first butt joint groove. The technical scheme of the application effectively solves the problem that the effect of the intervertebral fusion prosthesis in promoting bone ingrowth is poor in the related art, and the long-term stability of the intervertebral fusion prosthesis after implantation is poor.

The invention provides an artificial intervertebral disc, and belongs to the field of medical implantable orthopedic medical instruments. The artificial intervertebral disc comprises an upper end plate, a lower end plate, an upper-end porous structure, a lower-end porous structure and an elastic body for connecting the upper end plate and the lower end plate with the upper-end porous structure and the lower-end porous structure, the upper end porous structure and the upper end plate are integrally formed, the lower end porous structure and the lower end plate are integrally formed, and the elastic body, the upper end plate, the lower end plate, the upper end porous structure and the lower end porous structure are integrally formed. According to the artificial intervertebral disc, the elastic body and the end plate are firmly combined to form a mutually embedded and coated integrated structure, so that material damage and abrasive dust hidden dangers caused by interface friction between the end plate and the elastic body material are effectively reduced or eliminated; the outer surfaces, making contact with the human body bones, of the upper end plate and the lower end plate are each of a porous structure, anti-rotating thorns are distributed, and the immediate stability and osseointegration after operation are improved. The artificial intervertebral disc has the advantages of being firm in structure, not prone to damage and good in bone ingrowth effect, and the movement function of a normal intervertebral disc in a human body is met.

The invention discloses a 3D printing bone grafting bin-free interbody fusion cage which is characterized in that the 3D printing bone grafting bin-free interbody fusion cage comprises a supporting structure and a porous structure, the porous structure and the supporting structure are integrally printed and formed, the porous structure is constructed through connecting rods which are mutually connected in a space, and the porous structure is filled and stacked in the supporting structure; the support structure includes an edge. A through hole is formed in a gap between the connecting rods, and the through hole of the supporting structure is in an irregular shape. The 3D printing bone grafting bin-free porous interbody fusion cage is of a hexahedron structure, and the contour of the side wall of the porous structure achieves circular arc transition through fillets. The problems that a traditional interbody fusion cage is too high in elasticity modulus and has a stress shielding effect can be solved, the elasticity modulus of the 3D printing bone grafting bin-free porous interbody fusion cage is matched with the elasticity modulus of a human body bone of a patient part, bone grafting is not needed, and a good bone ingrowth effect can be achieved.

The present application relates to the technical field of medical devices, and discloses a knee joint prosthesis, which comprises a trabecular bone type, one side of the trabecular bone type is provided with a front condyle side, the other side of the trabecular bone type is provided with a notch, both ends of the trabecular bone type notch are provided with distal end sides, the upper surface of the distal end side is provided with a trabecular column, one side of the distal end side is provided with a rear condyle side, the side wall of the trabecular bone type is provided with a femoral condyle body, the inside of the trabecular column is provided with a column, one side of the rear condyle side is provided with a femoral component surface, and the outer wall of the femoral component surface is provided with. The femoral side prosthesis realizes better fusion of the femoral side prosthesis and bone tissue, promotes bone ingrowth, and achieves the effect of long-term stable fixation. The problems of poor long-term stability, easy loosening and easy wear of the friction interface of the traditional femoral side prosthesis are solved, and the service life of the prosthesis and the life quality of the patient are improved.

A spine internal fixing device with a fusion function comprises a pedicle screw, the pedicle screw comprises a screw body, a screw tail is arranged at the upper end of the screw body, a nut is connected to the screw tail through internal threads, the screw body and the screw tail are of a honeycomb structure simulating cancellous bone, and solid external threads are arranged on the outer surface of the screw body. According to the spinal internal fixation device with the fusion function, a full-assembly simulation cancellous bone honeycomb structure of a pedicle screw rod nut and a matched connecting piece is prepared by adopting a 3D printing technology, and meanwhile, solid structures of key stress parts such as an external thread tip threaded connection surface are reserved so as to guarantee early mechanical fixation strength; after the components are assembled, a continuous bone ingrowth channel is formed, so that the transformation of internal fixation of the spine from temporary mechanical support to permanent osseous fusion is realized, and various intervertebral, intervertebral, posterior lateral and transverse process bone grafting fusion steps in a traditional spine fusion operation can be omitted.

The invention discloses a hip joint prosthesis system and a preparation method thereof. The hip joint prosthesis system comprises a thighbone assembly, an acetabulum assembly and a soft tissue fixing device. The femoral component comprises a femoral stem and a femoral bulb, the femoral stem comprises a bone contact surface used for being combined with the thighbone of a user and a near-end bearing portion used for being connected with the femoral bulb, the near-end bearing portion extends laterally to form a neck, and the neck is provided with an interface structure. The bone contact surface of the femoral stem and the bone contact surface of the acetabular cup are each provided with a three-dimensional porous structure. The acetabulum assembly comprises an acetabulum lining arranged on the femur ball head in a sleeving mode and an acetabulum cup arranged outside the acetabulum lining in a sleeving mode. The soft tissue fixing device is mounted on the interface structure; the pore characteristic parameters of the three-dimensional porous structure on the femoral stem change in the axial direction of the femoral stem. According to the invention, the limitation that the traditional uniform coating cannot give consideration to the optimal bone ingrowth conditions of different bone regions can be overcome, and uniform and firmer osseointegration of the prosthesis in the body of a patient can be promoted.

Provided herein are medical devices and methods for treating bone fractures. The medical device comprises a body, a scaffold within the body, and a means for focusing bone growth throughout the body. The device is designed to minimize shear stresses on a distal tip and distribute micromotion to encourage bony ingrowth. The scaffold may include a triply periodic minimal surface (TPMS) with a cubic repeating pattern defining walls within the scaffold, and the TPMS may be helically wrapped around a central axis of the device. The device may also house biologic agents and accommodate an autologous product. In some embodiments, the medical device is a bone screw or a pedicle screw, designed to reduce common issues such as screw loosening, screw backout, and rod breakage. The method of treatment involves implanting the medical device into a patient's bone to aid fracture healing.

The invention belongs to the technical field of microorganisms and nutriology, and discloses bifidobacterium longum subsp.infantis CICC 6069 for promoting calcium absorption and application of a composition of the bifidobacterium longum subsp.infantis CICC 6069 and vitamin D in improvement of bone health. Cytology experiments and animal models verify that the strain can significantly promote absorption of intestinal epithelial cells to calcium ions and improve the serum calcium level and the calcium apparent absorption rate of calcium-deficient model animals; when the strain is combined with vitamin D, skeletal development (such as increasing bone length and improving bone mineral density) can be further remarkably promoted, and the synergistic effect is remarkably superior to that of single use of the strain. The invention provides an application of bifidobacterium longum infant subCICC 6069 in preparation of related products for promoting calcium absorption, and also provides a composition for promoting calcium absorption and / or improving bone health, and the composition comprises the strain and vitamin D. The invention further provides a preparation method of the bifidobacterium longum infant subCICC 6069 and a preparation method of the bifidobacterium longum infant subCICC 6069. The strain and the composition are suitable for preparing food, health food or medicine for promoting calcium absorption and improving bone health.

The utility model provides a skull implant which comprises an implant body, a plurality of first holes are formed in the surface of the implant body, the porosity of the implant body ranges from 5% to 50%, a plurality of second holes are formed in the edge of the implant body, and an included angle is formed between the hole axis of each second hole and the plane where the edge of the implant body is located. After the skull implant is implanted, the first hole in the implant main body assists liquid diffusion and cell tissue ingrowth, a small amount of subcutaneous effusion can be dispersed and absorbed by the cell tissue, and a false membrane is prevented from being formed between the skull implant and the cell tissue, so that the occurrence rate of generation of the subcutaneous effusion is reduced. When the skull implant is used, the edge of the implant body makes contact with bone tissue, the second hole is matched with the direction in which the bone grows into the skull implant, conditions are provided for the bone tissue to grow into the skull implant, the integration effect of the bone tissue and the skull implant is improved, and bone growth and healing can be effectively promoted.