119 results about "Diaphysis" patented technology

A trial femoral assembly for hip arthroplasty and associated method of use is disclosed that includes a head, a neck connected to the head, and a stem or broach connected to the neck, wherein the neck is expandible and collapsible. Also, the stem or broach can move laterally in relation to the longitudinal axis of the neck. A first embodiment includes a notched rod located within a housing and within a circular lower neck portion having a tilted spiral cam that interacts with the notched rod to provide movement involving extension or retraction of the neck. A second embodiment includes a bevel gear located on an outer surface of the head that engages a screw located inside the head to move the neck to provide extension or retraction. A third embodiment includes at least three nested, telescoping threaded elements with oppositely handed threads that extend or retract the neck.

The invention relates to the technical field of medical image processing, artificial intelligence and the like, and provides a bone age assessment method and system based on an AI model and a bone age instrument. A detected left wrist X-ray image is preprocessed through gray scale standardization, noise filtering and a self-supervised learning model, the ratio of the width of the distal radius epiphysis to the width of the metaphysis, the length of the metaphysis of the third palm bone and graded skeleton features of the maturity of auxiliary ossification points are extracted through a Vision Transform, and multi-modal data fusion is conducted on the extracted skeleton features and demographic information. And a multi-layer perceptron model is adopted to predict the fused multi-dimensional bone age related data, and a bone age evaluation report is output, so that errors in bone age prediction of children and teenagers are effectively reduced, and the detection efficiency is improved.

The invention discloses a management device for patient leg fracture nursing, and belongs to the field of orthopedic trauma, the management device comprises a bed body, an arranged fracture management mechanism is used in cooperation with a fracture patient, the legs of the patient are placed on the top surface of a bottom plate, and the shanks and thighs of the patient are supported through a thigh supporting plate and a shank supporting plate respectively; after thighs and shanks of a patient are bound and bound together with the thigh supporting plate and the shank supporting plate through belt buckles and binding belts respectively, the position of the traction plate is adjusted according to the position of a bone needle part after fracture puncture at the thigh proximal end, the femoral shaft, the knee joint or the ankle joint of the shank of the patient, and a bone needle is placed in one bone needle clamping groove; after the traction plate is fixed on the L-shaped adjusting plate through the second screw hole knob, the L-shaped adjusting plate is pushed to move towards the right side by rotating the first screw hole knob on the fixed threaded rod, and the compression spring is forced to perform retraction operation, so that the aim of performing bone traction on a patient is fulfilled.

A system for sizing the resected surface to provide metaphyseal referencing and to properly guide a tool into a central portion of the canal in the diaphysis. The system can include a sizing feature to approximate the size of the metaphysis. The system can also include a base configured to contact the metaphysis and a guide feature configured to guide a tool along a central portion of the canal in the diaphysis.

The utility model discloses a proximal femur intramedullary nail main nail guide needle entry point positioner, and relates to the technical field of medical instruments, in particular to a proximal femur intramedullary nail main nail guide needle entry point positioner which comprises a positioner body, the positioner body is composed of a handle portion and a low-incisura pressing portion, and the pressing portion is in a plate shape with a certain thickness. And the front edge of the piriform muscle nest is sensed through the side wall structure until the front edge and the piriform muscle nest are relatively clamped. Then, a guide needle is placed in a guide hole of the pressing part, and under C-arm machine perspective, the position of the guide needle on the side position X-ray perspective piece is properly adjusted, so that the needle inlet point of the guide needle is located at the vertex position on the normal position X-ray perspective piece and located at the central axis position of the femoral neck on the side position X-ray perspective piece. The guide needle is inserted into the femoral shaft, the positioner is taken down, subsequent operation steps such as opening, imbedding of the main nail, the head nail and the tail nail are carried out in sequence, and the purpose of effectively and accurately locking the needle inserting point position of the main nail guide needle of the proximal femoral nail is achieved.

The invention relates to a femoral stem and a hip joint prosthesis. The femoral stem comprises a near-end prosthesis stem, a far-end prosthesis stem and a locking rod. A mounting channel is arranged in the near-end prosthesis handle, the mounting channel penetrates through the near-end prosthesis handle in the direction from the near end of the near-end prosthesis handle to the far end of the near-end prosthesis handle, and a crimping surface is arranged on the near-end prosthesis handle; the far-end prosthesis handle is detachably mounted at the far end of the near-end prosthesis handle, and the far-end prosthesis handle is provided with an anti-retreating structure; one end of the locking rod penetrates through the mounting channel and abuts against the crimping surface, and the other end of the locking rod is connected with the far-end prosthesis handle. The femoral stem can pressurize a human body femoral metaphyseal osteotomy surface and a human body femoral shaft osteotomy surface, so that the contact area between the two osteotomy surfaces is increased, and the stability and the healing speed after the femoral stem is implanted are improved.

Augments for implantation of an orthopedic implant device in a bone. A distal end of an outer portion of the augment can have a shape that is configured to generally conform to the shape of a metaphyseal-diaphyseal junction of an intramedullary canal of the bone. Further, a proximal end of the outer portion of the augment has a shape that is configured to generally conform to a shape of the metaphyseal region of the intramedullary canal. Additionally, the shape of the outer portion at the distal end can be separated from the shape of the outer portion at the proximal end by a distance that is approximately equal to the distance between the metaphyseal-diaphyseal junction and the metaphyseal region of the intramedullary canal.

The application relates to the technical fields of medical image processing and artificial intelligence, and provides a bone age evaluation method and system based on an AI model and a bone age instrument. The left wrist X-ray image of a subject detected in the bone age instrument is acquired, and the demographic information of the subject is recorded. The detected left wrist X-ray image is pretreated through gray standardization, noise filtering and a self-supervised learning model. The Vision Transformer is used to extract the distal radius epiphysis and metaphysis width ratio, the third metacarpal metaphysis length and the auxiliary ossification point maturity grading skeletal features, and the multi-modal data fusion is carried out with the demographic information. The multi-layer perception model is used to predict the fused multi-dimensional bone age related data, and a bone age evaluation report is output, so that the error in the bone age prediction of children and adolescents is effectively reduced, and the detection efficiency is improved.

Within examples, a surgical device with an embedded sensor system for performing hip replacements is described. This device mitigates fracturing of the mid metaphyseal / diaphyseal region of the femur, and ensures adequate press-fit of the component into the bone. The device relays information regarding forces experienced by the patient's bone to a separate data acquisition device and displays it on an interface. This information is used by the surgeon to determine the force present inside of the patient's bone during broaching, and can then be used to provide better care, and mitigate fractures due to overloading in the bone.

The invention discloses a proximal humerus fracture adjustable repositor, and relates to the field of orthopedic medical technology, the proximal humerus fracture adjustable repositor comprises a first main rod and a second main rod, one side of the surface of the first main rod is provided with an annular groove, and the interior of the annular groove is slidably connected with a sleeve in threaded connection with the surface of the second main rod; an adjusting assembly used for independently adjusting the kirschner wire in a three-dimensional mode is arranged outside the second main rod, and an anti-displacement assembly used for limiting the kirschner wire is arranged outside the adjusting assembly. The humerus reduction ring rotates in the mounting groove to enable the first threaded kirschner wire to achieve forward and backward inclination adjustment, the rotation angle of the humerus head relative to the backbone is adjusted through sliding of the first threaded kirschner wire in the adjusting groove, and three-dimensional adjustment of the first threaded kirschner wire is achieved through axial traction, forward and backward inclination angle adjustment and control of the rotation angle. Therefore, the resetting accuracy is improved.

The present application relates to the technical field of medical image processing, and provides a knee femur and tibia segmentation method based on region growing, comprising the following steps: S1, acquiring knee medical images; S2, selecting a growth seed point; S3, coarsely segmenting the knee medical images to obtain knee stem data; S4, finely segmenting the knee medical images to obtain knee connection data; S5, fusing the knee stem data and the knee connection data to obtain knee femur and tibia image data with complete contours; S6, coarsely filling the knee femur and tibia image data to obtain knee femur and tibia image data after coarse filling; and S7, iteratively filling holes in the knee femur and tibia image data by using a three-dimensional sliding window, so as to obtain image data that is consistent with the surrounding data in shape, position and completeness and smoothness. The present application solves the problems of slow segmentation speed, unstable segmentation effect, incomplete segmentation and adhesion in preoperative planning of knee replacement surgery.

Augments for implantation of an orthopedic implant device in a bone. A distal end of an outer portion of the augment can have a shape that is configured to generally conform to the shape of a metaphyseal-diaphyseal junction of an intramedullary canal of the bone. Further, a proximal end of the outer portion of the augment has a shape that is configured to generally conform to a shape of the metaphyseal region of the intramedullary canal. Additionally, the shape of the outer portion at the distal end can be separated from the shape of the outer portion at the proximal end by a distance that is approximately equal to the distance between the metaphyseal-diaphyseal junction and the metaphyseal region of the intramedullary canal.

An orthopaedic surgical instrument includes an assembly collar having a cavity extending between a superior opening and an inferior opening. The cavity is sized to receive a tapered trunnion of an implanted femoral stem. A bore extends between an inferior end and a superior end of the assembly collar and is configured to align with an implant bore formed in the implanted femoral stem. The bore and the implant bore are configured to receive a fastener to secure the assembly collar to the implanted femoral stem. A method of utilizing the orthopaedic surgical instrument is also contemplated.

The invention discloses a metaphyseal distraction osteotomy reduction device for treating ulnar impingement syndrome through a wrist arthroscope. The device comprises a bottom plate, and a surrounding mechanism, a distraction mechanism, an osteotomy mechanism and a reduction mechanism are fixedly installed on the bottom plate; the encircling mechanism is provided with a placing space conforming to the far end of the ulna of the wrist joint of the human body; the distraction mechanism is used for distraction of skin tissue around the metaphysis and exposure of an ulnar metaphysis osteotomy area. The reset mechanism resets the ulna bone after osteotomy through a reset hook, and a screw guide needle is arranged in the ulna bone according to a kirschner wire guide hole in the ulna bone. The device has the advantages of structural integration, ergonomic design, accurate distraction and osteotomy, powerful reset function and the like, and an efficient, safe and accurate solution is provided for treating ulnar impingement syndrome through a wrist arthroscope.

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

The utility model discloses a metal 3D printing porous bone induction structure tibial prosthesis, which comprises a diaphysis prosthesis, a bone fracture plate and an intramedullary nail, the diaphysis prosthesis is designed according to the anatomical form of the focus part of a patient, the diaphysis prosthesis comprises a solid framework and a porous structure, and a cavity is arranged in the diaphysis prosthesis; the at least two bone fracture plates are connected to the two ends of the diaphysis prosthesis in the tibia direction respectively, and the at least two bone fracture plates are connected with the tibia near end and the tibia far end through screws respectively. The tibia near end comprises a first medullary cavity, the tibia far end comprises a second medullary cavity, the intramedullary nail penetrates through the first medullary cavity, the cavity and the second medullary cavity, and the two ends of the intramedullary nail are connected with the tibia near end and the tibia far end through screws respectively. The utility model can solve the problems of incapability of realizing rapid healing, poor initial stability and poor long-term stability in the existing bone defect reconstruction.

The present invention discloses an intramedullary reducer for long bone fractures of limbs, comprising a guide hose, a guide wire, a driving mechanism and a wire feeding mechanism. The guide hose can be extended into the medullary cavity of the long bone shaft, and a capsule body capable of guiding the forward direction of the guide hose is fixed at the front end of the guide hose. The guide wire is inserted into the guide hose, and the front end of the guide wire extends out of the guide hose and is fixed with a blunt head abutting against the guide hose. The driving mechanism is used to drive the guide hose to move forward, and the distance between the driving mechanism and the front end of the guide hose is at least 10 mm. The wire feeding mechanism is placed outside the long bone shaft and is used to drive the guide wire to move forward.

This invention discloses an automatic measurement method and system for the Cobb angle of scoliosis based on an improved YOLOv8n-obb model. The method includes acquiring a spinal image (containing several vertebrae), inputting the spinal image into a pre-trained deep learning model based on an improved YOLOv8n-obb model, and outputting the positions of several vertebrae. The deep learning model includes a backbone network, a cervical network, and a head network. The backbone network is a multi-scale convolutional module combining C2f, DCNv2, FADC, and SPPF, used to acquire multi-scale features of the spinal image. The cervical network is a feature fusion module combining DSS, an attention layer, and a sampling layer, used to perform feature fusion on the multi-scale features. The head network includes multiple detection heads, used to perform rotational target detection based on the multi-scale features fused to obtain the positions of several vertebrae, and then obtaining the Cobb angle based on these vertebrae positions. This invention uses a deep learning model improved by YOLOv8n-obb to perform rotational target detection on the vertebrae positions, thereby predicting the Cobb angle of scoliosis.

The invention relates to the technical field of medical instruments, in particular to a backbone lesion windowing tool set which is easy and convenient to operate, capable of rapidly manufacturing a bone window on a long bone backbone and reducing the occurrence rate of pathological fracture in the bone window manufacturing process and after the operation, regular in window shape, smooth and non-sunken in cross section, capable of reducing the window area to the maximum extent and capable of improving the production efficiency. Postoperative recovery is facilitated; comprising a trephine and a swing saw, the trephine, the swing saw and the guide plate assembly jointly form a windowing tool set, the positioning needle core is located on one side of sawteeth of a trephine pipe and fixed in the trephine pipe of the trephine through a fixing piece, and the tip end of the positioning needle core extends outwards from the inside of the trephine pipe.

The present invention discloses a novel cephalomedullar nail for preventing the backward tilt of head and neck bone blocks, and belongs to the technical field of medical fracture reduction instruments. The cephalomedullar nail with a device for preventing the backward tilt of head and neck bone blocks comprises a main rod, a main nail and an anti-backward tilt screw; the main rod is used to be inserted into the femoral shaft of the patient; the first end of the main nail is penetrated to connect the main rod, and the second end is penetrated to fix the fracture block of the femoral neck and femoral head; the first end of the anti-backward tilt screw is penetrated by the main rod, and the second end is penetrated by the femoral neck medulla, reaching the posterior edge of the anterior cortex of the femoral neck. The problem that the main rod is penetrated by the femoral shaft, and the main nail is penetrated by the femoral neck and femoral head, the cortical alignment is easily lost in the process of obtaining secondary stabilization after postoperative sliding, and the healing rate of the cortical support reduction to the fracture is low is solved. The second end of the anti-backward tilt screw of the present invention is penetrated by the femoral neck medulla, directly reaching the posterior edge of the anterior cortex of the femoral neck, playing a blocking role in preventing the cervical cortex of the head and neck bone block from tilting, falling back, and moving backward.

The invention discloses a cortical bone compression mechanics experiment test piece preparation method, which comprises: 1, full bone marking and positioning, which is used for determining the cortical bone distribution position on a backbone and marking a loop line perpendicular to the axis of the backbone in a segmented manner; 2, bone body annular cutting is carried out, wherein the bone is annularly cut along the mark, and it is guaranteed that the central axis of the segmented bone section is kept consistent with the original femur; 3, annular end face marking is conducted, specifically, a cutting area is marked in the circumferential direction of the bone ring, and it is guaranteed that all sections are located on the same circumference during sampling; fourthly, cylindrical coring is conducted, specifically, cutting is conducted one by one through a coring drill bit according to the marked cutting areas, and the rotating speed of the coring drill bit is lower than 200 rpm; and step 5, sample polishing: polishing the end surfaces of the two sides of the cylindrical sample, and reducing the parallelism of the two ends to be less than 0.01 mm. According to the method, the cylindrical cortical bone sample can be effectively prepared, and the axial characteristics of the cortical bone serving as a material can be more accurately reflected.

A design method of an anatomical plate for treating a distal femoral fracture and an anatomical plate are provided. The design method includes: obtaining a high-precision three-dimensional model of a fractured bone of a patient; simulating intraoperative reduction to obtain a post-reduction bone model; establishing a finite element model and performing finite element analysis to determine a force condition of the post-reduction bone model; extracting point arrays of a cross section and a coronal plane from a medial femoral condyle part and a diaphysis part of a distal femur of the post-reduction bone model, connecting the point arrays of the cross section and the coronal plane to obtain a connection curve, and obtaining a solid body design of a plate body; adjusting a thickness and a shape of the plate body according to the force condition and an implantation condition of the post-reduction bone model to obtain an anatomical plate.

The application discloses a kind of biomimetic composite scaffold with periosteum-cortical bone-cancellous bone structure and its preparation method and application.The scaffold is assembled by independent periosteum biomimetic scaffold module and independent bone trunk biomimetic module.The periosteum biomimetic scaffold module is cylindrical tube structure hydrogel, loaded with zinc silicate particles and periosteum related cells, with the biological functions of promoting cartilage differentiation, secreting nerve and vascular factors and synthesizing periosteum matrix proteins.The bone trunk biomimetic scaffold module is cylindrical bioceramic, with multiple vertical pipes embedded in the dense layer of outer wall to simulate cortical bone, and with staggered structure inside to simulate cancellous bone.Animal experiments show that the biomimetic composite scaffold can effectively promote the integrated regeneration of bone trunk and periosteum in rabbit radial critical size defect model.Therefore, the application provides a new solution for the biomimetic design and regeneration repair of bone tissue engineering.

The utility model discloses an orthopedic internal fixation steel plate system, and relates to the technical field of medical instruments. The two opposite sides of the steel plate in the thickness direction are provided with a first surface and a second surface capable of making contact with a backbone, the multiple protrusions are arranged on the first surface at intervals in the length direction of the steel plate, and the two opposite ends of the steel plate in the length direction are provided with through holes penetrating in the thickness direction of the steel plate. One end of each limiting piece is provided with a clamping part, the other end of each limiting piece is provided with an insertion part capable of penetrating through the diaphysis cortex, the limiting pieces are in one-to-one correspondence with the through holes and penetrate through the through holes, and the clamping parts are located on the sides, close to the first surface, of the through holes and can be clamped to the steel plate; a plurality of hoop assemblies are arranged corresponding to the convex parts and the clamping parts, in each hoop assembly, a first half-ring hoop and a second half-ring hoop are detachably connected and form a surrounding area capable of surrounding the steel plate and the backbone, and the inner side face of each first half-ring hoop is provided with a groove capable of being connected with the corresponding convex part or the corresponding clamping part in a matched mode. No screw is needed for fixation, bone injury is reduced, and the fracture healing effect is improved.

Within examples, a surgical device with an embedded sensor system for performing hip replacements is described. This device mitigates fracturing of the mid metaphyseal / diaphyseal region of the femur, and ensures adequate press-fit of the component into the bone. The device relays information regarding forces experienced by the patient's bone to a separate data acquisition device and displays it on an interface. This information is used by the surgeon to determine the force present inside of the patient's bone during broaching, and can then be used to provide better care, and mitigate fractures due to overloading in the bone.

The invention discloses an integrated porous backbone prosthesis based on a 3D printing technology. The invention provides an integrated porous diaphysis prosthesis which comprises the following steps: 1, designing the integrated porous diaphysis prosthesis by utilizing a modular design method; 2, the permeability and mechanical property of the contact area are tested, the structure of the contact area is more similar to that of the thighbone through fusion design, and the porous structure provides conditions for bone cell growth; 3, biomechanical analysis and comparison are carried out on the bone cement type diaphysis prosthesis and the integrated porous diaphysis prosthesis, and it is found that the porous diaphysis prosthesis can reduce the stress shielding effect and promote bone tissue growth. The porous diaphysis prosthesis designed by the invention is more compactly attached to the femur and more conforms to the anatomical shape of the human body, and the force line of the lower limbs of the human body is prevented from being changed due to the structure of the prosthesis. The integrated porous backbone prosthesis simulates the structure of a natural bone to a great extent, the comprehensive performance is excellent, and bone cell growth, nutrient substance transportation and mechanical property support are improved to a great extent.

A femoral intramedullary device is capable of treating a variety of femoral bone fractures. The device includes an intramedullary nail capable of antegrade or retrograde insertion into the femur and having a shank long enough to extend into the shaft of the long bone and reach the corresponding distal area or proximal area and sockets located intermediate the ends of the shank for receiving anchoring pins or screws extended transversely or radially from the shaft of the long bone. The intramedullary nail is placed in the intramedullary canal of a portion of the bone and the screws are fixed in the radial sockets or receivers at the level of the femoral neck to provide mechanical support across the bone. Transverse screws are placed through the transverse sockets to provide additional support and secure the nail within the femur.

Training aids for surgeons to simulate the repair or replacement of a knee joint include unitary pieces comprised of a material strong enough to withstand being put under tension without snapping, yet soft enough to be cut, filed, and / or drilled. An orthopaedic training device (100) is provided comprising a facsimile of a distal portion of a femur (200) and a facsimile of a proximal portion of tibia (200), wherein respective diaphysis portions (220, 320) and metaphysis portions (230, 330) of each facsimile are comprised of a first material having a first hardness, the femur epiphysis portion (240) is comprised of a second material having a second hardness, and the tibia epiphysis portion (340) is comprised of a third material having a third hardness, the first hardness being greater than the second hardness and the third hardness. In this way, the diaphysis portions and metaphysis portions may withstand tension, and the epiphysis portions may remain soft enough to be used in surgical procedures.

The present application relates to a long bone prosthesis, in particular to a segmental long bone prosthesis, the technical solution of which is as follows: it comprises a proximal handle and a medullary needle segment, a main body of a backbone segment is arranged between the proximal handle and the medullary needle segment, one end of the medullary needle segment is inserted into one end of the main body of the backbone segment, a retaining groove is provided on the peripheral surface of the medullary needle segment, a retaining hole is provided on the main body of the backbone segment, a retaining bead embedded in the retaining groove is provided inside the retaining hole; a sliding sleeve is provided on the outside of the main body of the backbone segment, and the retaining bead is pressed between the inner wall of the sliding sleeve and the bottom of the retaining groove; at the same time, a positioning pin is provided through the sliding sleeve and the main body of the backbone segment; the purpose of facilitating the installation of the segmental long bone prosthesis to save operation time and improve the stability and reliability of the prosthesis structure is achieved.

The invention relates to a prosthesis (P) for a fractured long bone, comprising a stem portion (1) and an implant (20) distinct from the stem portion (1), the stem portion (1) comprising: a rod (3) configured to be inserted into a bone marrow cavity (8) of a diaphyseal fragment (2) of the fractured long bone to secure the stem portion (1) to the diaphyseal fragment (2); and an epiphyseal (5) fixedly secured to the rod (3) by at least one connecting leg (7) of the stem part (1) such that a gap (9) is formed between the epiphyseal and the rod (3) along the at least one connecting leg (7), the implant (20) comprising: an inner portion (22) located at least partially within the gap (9), and at least one fastener (24) for fastening epiphyseal fragments (4) of the fractured long bone to the stem portion (1), the at least one fastener (24) being fixed to the inner portion.