123 results about "Bone Cortex" patented technology

Computer implemented methods, systems, and computer products employing program code or algorithms for use in customized patient specific hip implants or femoral stems or sleeves having an outer surface that corresponds more closely to the inner surface of the cortical bone of a patient's femur compared to conventional hip implant or femoral stems or sleeves based on population-based design.

The utility model discloses a 3D printing porous pedicle screw which comprises a screw body part and a screw cap part, the screw body part comprises a cortical bone thread area close to one end of the screw cap part and a cancellous bone thread area far away from one end of the screw cap part, and a porous structure area is arranged at one end, not connected with the screw cap part, of the screw body part. The porous structure area comprises an inner core column extending in the axial direction of the nail body part, at least one reinforcing beam and a porous structure, the reinforcing beams extend outwards from the periphery of the inner core column, and the porous structure is annularly distributed on the outer periphery of the inner core column. The porous structure can efficiently induce bone tissue to grow in, the screw and a vertebral body are connected into a whole, stress is effectively dispersed, the stability of the screw is improved, the porous structure is arranged on the vertebral body at the front end of the screw, screw breakage caused by stress concentration of the screw in a vertebral pedicle area can be avoided, meanwhile, the stability of the screw can be better improved through the reinforcing beam, and the service life of the screw is prolonged. The possibility of fracture of a porous area of the screw is reduced, generalization performance is better, and the use experience feeling is improved.

Surgical systems and methods for manipulation of an anatomy that includes cortical and cancellous bone. A surgical manipulator has a robotic arm to move an instrument with an energy applicator. A sensor senses forces / torques applied to the energy applicator. Controller(s) obtain a tool path for the energy applicator to traverse. A segment of the tool path transitions into, or between, cortical bone and cancellous bone. The controller(s) control the manipulator to advance the energy applicator along the tool path according to a first feed rate to manipulate the cortical or cancellous bone and detect, with the sensor, a change in the forces / torques being indicative of the transition. In response to detection of this change, the controller(s) control the manipulator to advance the energy applicator along the tool path according to a second feed rate, greater / less than the first feed rate.

An osteogenic composition comprises growth-factor augmented cortical bone and cancellous bone having viable endogenous osteogenic cells that remain adherent to the cancellous bone. The growth-factor augmented cortical bone comprises demineralized cortical bone amplified with growth factors derived from a demineralized bone, and the cancellous bone not having been subjected to a loosening agent. The osteogenic composition is cryopreserved or lyopreserved. A method for preparing an enhanced graft composition with improved osteoinductive properties includes processing demineralized cortical bone; solubilizing growth factors from demineralized bone; and mixing the demineralized cortical bone with the solubilized growth factors.

This invention pertains to spinal pedicle screws, specifically locking spinal pedicle screws, including perforated pedicle screws and cortical bone screws that work with them. The proximal end of the self-locking master screw is thickened. A through-hole is provided in the thickened section of the pedicle screw, and the cortical bone screw is driven into the through-hole and fixed to the upper and lower cortical bone layers of the pedicle to form a triangular fixation. After the pedicle screw is implanted, both ends of the through-hole of the pedicle screw are located inside the pedicle. A hole is drilled from the posterolateral aspect of the pedicle using a special aiming device, passing forward and upward through the oblique hole of the pedicle screw, and then through the anterior and superior cortical bone of the pedicle. After measuring the length, a suitable cortical bone screw is selected, screwed in, and locked, fixing the posterolateral cortical bone, the pedicle screw, and the anterior and superior cortical bone of the pedicle. The screw is positioned in a safe area of ​​the superior cortical bone of the pedicle. The cortical bone screw is fixed to the upper and lower cortical bone of the pedicle by passing through the oblique hole, thus locking the position of the pedicle screw.

The invention discloses an infectious bone defect bionic repair hydrogel stent and a preparation method and application thereof, and is characterized in that the infectious bone defect bionic repair hydrogel stent is composed of an upper antibacterial-vascularization layer simulating a periosteum structure, a middle support layer simulating a bone cortex structure and a lower regeneration-regulation layer simulating a cancellous bone structure; the upper antibacterial-vascularization layer is prepared from photoresponse CuxO / SiC heterojunction powder, the middle support layer is prepared from silk fibroin, and the lower regeneration-regulation layer is prepared from HAP (at) Cur-CNDs-Pt NPs composite nanoparticles. The multi-dimensional structure and function integration realizes the full-period regulation and control of antibiosis-barrier-regeneration, breaks through the limitation of the traditional single-function stent, and provides an integrated solution for infectious bone defect repair.

The invention discloses a bone-like osteoma microwave ablation thermal injury assessment method based on all-optical parameters, which comprises the following steps: respectively considering thermal injury models of cortical bone and cancellous bone under different microwave ablation conditions by constructing a simulation model conforming to bone tissue characteristics; according to the method, construction of an incomplete P5 approximation model is proposed, bone tissue all-optical parameter anti-construction research based on steady-state radiance is carried out, the accuracy is high, calculation is convenient, temperature parameters and biological tissue all-optical parameters are analyzed in a combined mode, a tissue thermal damage model of the temperature and tissue all-optical parameters is established through theoretical research, and due to the characteristics of different bone tissues, the tissue thermal damage model can be used as a tissue thermal damage model of the temperature and tissue all-optical parameters. The tissue types are considered in the thermal damage model, and effective bone tissue thermal damage factors are designed based on different tissues, so that the evaluation accuracy is ensured.

CT images from the neck, lung, cardiac, abdominal, pelvis, hip, spine or lower extremity areas are obtained and analyzed by a computer to measure trabecular bone density on each level it is available, in the spine and hip. Any bone tissue associated with vertebrae that is fractured is excluded, along with Schmorl's nodes, large blood vessels, and cortical bone, to accurately average the trabecular bone density on a scan. The density of fat, heart, and muscle tissue of a subject is used to calibrate the results. That data may be input to an absolute fracture risk model (Fracture Risk Algorithm calculator). Information such as bone density, T score, Z score, fracture risk, and identification of vertebral fractures (if present) may be determined and reported.

Disclosed herein are tracking element fixation elements for affixing computer-assisted surgical system (CASS) tracking elements to a patient. Fixation systems provide kinematic coupling or clamping functionality that allows tracking elements (attached to a tracker arm) to be repeatedly and accurately detached and re-attached to facilitate removal when necessary, such as for point probe data collection, during impaction, bone movement, and / or the like. Fixation systems may include a baseplate and a tracker arm configured to be kinematically coupled to the baseplate via a magnet associated with independent ball bearings or contacts extending from a bottom surface of the magnet. The ball bearings or contacts are configured to be received within corresponding grooves of the baseplate. The baseplate may include one or more protrusions extending from a bottom of the baseplate that are configured to be impacted into the cortical bone of the patient.

The present invention provides muscle-derived progenitor cells that show long-term survival following transplantation into body tissues and which can augment non-soft tissue following introduction (e.g. via injection, transplantation, or implantation) into a site of non-soft tissue (e.g. bone) when combined with a biocompatible matrix, preferably SIS. The invention further provides methods of using compositions comprising muscle-derived progenitor cells with a biocompatible matrix for the augmentation and bulking of mammalian, including human, bone tissues in the treatment of various functional conditions, including osteoporosis, Paget's Disease, osteogenesis imperfecta, bone fracture, osteomalacia, decrease in bone trabecular strength, decrease in bone cortical strength and decrease in bone density with old age.

The present disclosure refers to a system for determining a cortical bone, comprising: an ultrasound transducer which is configured to transmit an ultrasound wave to a region of interest, and to receive a backscattered ultrasound wave which is backscattered from the region of interest, wherein the region of interest comprises a cortical bone; and an evaluation unit which is configured to determine at least one of a pore size, a bone thickness, and a speed of sound in the cortical bone by evaluating the backscattered ultrasound wave. Further, a method for determining a cortical bone is provided. A computer program product which, when executed by a processor, executes the method.

Provided is a skeleton protection method, which comprises administering to a subject in need thereof an effective amount of a peptide comprising the amino acid sequence of SEQ ID NO: 1. The present invention proves that administering the peptide of SEQ ID NO: 1 can ameliorate cortical bone erosion of calcaneus bone resulting from rheumatoid arthritis (RA) and restore the decline of RA-induced bone mineral density. Therefore, the peptide of SEQ ID NO: 1 possesses a therapeutic effect for skeleton protection.

The utility model relates to the technical field of orthopaedic minimally invasive surgery robots, and discloses a flexible mechanical arm for orthopaedic minimally invasive surgery, which comprises a base and a supporting seat, the top end of the base is fixedly connected with the supporting seat, and a first mounting groove is arranged in the supporting seat. According to the flexible mechanical arm for the minimally invasive surgery in the orthopedics department, during surgery, operation is conducted through a robot host after the mechanical arm is connected, surgery operation is conducted after a drill bit is correctly positioned, when the drill bit enters a vertebral pedicle to make contact with a first layer of cortical bone, vibration is strengthened, and when the drill bit breaks through the first layer of cortical bone, vibration is reduced; the flexible electron senses changes of vibration and pressure, the drill bit is stopped through an algorithm, and therefore the situation that the drill bit moves forwards excessively and causes iatrogenic injury is avoided, whether the drill bit is located at the optimal position or not can be sensed in real time in the operation process by setting the optimal pressure value and the optimal frequency value, and the operation efficiency is improved. The problem that operation guidance cannot be accurately conducted in the operation in real time is solved.

A method and system for analysis of medical images is presented in the field of analysis of medical images. The method and systems is provided to determine one or more parameters of bones in medical images. The method and system may be characterized as an advancement in analysis of medical images to ascertain bone health and discern pathologies in bone. Specifically, a system and method is disclosed for analysing medical images showing at least a portion of a bone to determine one or more bone parameters for the at least one portion of a bone. Steps taken by the system and method include: determining a region of interest of the medical image; identifying a boundary of at least one of an inner edge and an outer edge of cortical bone of the at least one portion of the bone within the region of interest; identifying at least one boundary of trabecular bone of the at least one portion of the bone within the region of interest; utilising the identified boundaries to determine at least one of the following bone parameters: orientation, bone mineral density, length, width of trabecular structure, for the at least one portion of bone within the region of interest.

An apparatus and methods are provided for a one-step dental implant that avoids pressure points and heat production within a patient's bone. The dental implant includes a bone cutting portion having a centering tip surrounded by bone cutting edges and soft tissue knives. The centering tip perforates the gingiva while the soft tissue knives dissect the gingiva with a precise circular cut. The bone cutting edges chisel the bone as the dental implant is tightened into the bone. Deflecting sides direct bone powder into axial bone storage areas. A gingival sealing portion includes a cylindrical portion that fits into cortical bone without friction or exerting pressure on the bone. The cylindrical portion removably retains components that include a silicone O-ring. Engaging sections of the cylindrical portion enable driving the dental implant into the patient's bone. Internal threads of the cylindrical portion enable clamping abutments onto the dental implant.

The invention provides a bone evaluation method based on neural network enhancement and finite element analysis. The bone evaluation method comprises the following steps: acquiring an ultrahigh-resolution CT image of a living vertebra; performing domain conversion processing on the CT image by adopting a generative neural network; carrying out resampling and segmentation on the enhanced CT image; constructing a bone trabecula microstructure model in the cancellous bone mask area; assembling the RVE unit and the cortical bone model into a complete vertebral finite element model, and applying a multi-working-condition load to the RVE unit to calculate anisotropic material parameters; and carrying out axial compression finite element analysis on the complete centrum model, and judging the bone health state. According to the method, information of two dimensions of bone mass and bone, especially contribution of a bone trabecula microstructure to bone strength, is comprehensively considered, bone degeneration and fracture high-risk patients can be recognized earlier, and a scientific basis is provided for clinical early intervention.

Described herein are three-dimensional scaffold compositions and methods for bone repair or regeneration. In some embodiments, the disclosed scaffolds comprise a core portion mimicking a native trabecular bone structure that is surrounded by an exterior portion mimicking a native cortical bone structure. In some embodiments, the scaffolds may be functionalized by mineralization and / or pre-vascularization to promote bone and blood vessel formation.

The present invention relates to a system and a method for bone fracture risk assessment and provides for a system to predict Osteoporosis and Osteopenia and its associated fracture risk automatically from conventional chest X-ray image. The invention provides an automated digital X-ray bilateral Clavicle Radiogrammetry and its estimation of Cortical Thickness and Calculation of Cortical bone mass indices of Clavicle to predict dual Hips (Neck) Bone Mineral Density (BMD), dual Hips (Total) Bone Mineral Density (BMD) and Spine (Total) Bone Mineral Density (BMD) as measured by dual energy X-ray absorptiometry (DXA) bone densitometer and 10-year probability of both Major Bones (hip, spine, humerus or forearm)—and Hip-Osteoporotic Fracture Risk Scores. Using the same chest X-ray, an automated prediction of Osteoporosis and Osteopenia at both dual hips and spine regions and 10-year probability of both Major Bones and Hip Osteoporotic Fracture Risk using Artificial Intelligence (AI).

The application discloses an individual customized long bone defect filling biomimetic bone block, which has biological compatibility and is a topological optimization structure and comprises a support cylinder, a middle filling body and an inner filling body from outside to inside. The support cylinder is a dense cylindrical structure, has connecting parts for being connected with bone cortices at both ends of the support cylinder, and further has fusion parts at both ends of the inner wall of the support cylinder. The fusion parts are annular and are made of degradable material with a porous lattice structure, and the outer end surface of the fusion part is in contact with the end surface of the connected bone cortex. The middle filling body is arranged in the support cylinder and is filled between the two fusion parts and is made of degradable material. The inner filling body is filled in the middle filling body, and both ends of the inner filling body do not extend into the fusion part. The middle filling body and the inner filling body are stacked by a plurality of porous cell units. The dense non-degradable material and the loose porous degradable material are combined, the mechanical properties are optimized through the topological structure, the growth simulation is realized by using different lattice form characteristics, and the rapid osteogenesis is promoted.

Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body (2) for implantation at one end of a long bone (99). An outer face of the inner body (2) is designed as a bone contact face (20) for bearing on the surrounding bone margin (97). According to the invention, an outer shell piece (3) is provided which, as a bone replacement piece, is doubled onto the outside of the inner body (2) for filling a defect at the cortical bone margin (97) and is not dimensioned peripherally, such that, in the circumferential direction, it covers only a part of the outer circumference of the inner body (2). The doubled outer shell piece (3) forms a filler piece for a bone defect (bone window 96) at the bone end. Closure of the bone window (96) is achieved, and unwanted contact between the graft and surrounding soft-tissue parts is avoided. Moreover, the graft is thus also supported in the region of the bone window (96). Parts of the bone margin (97) that are still present can thus remain intact, allowing the greatest possible preservation of naturally present bone substance.

A threaded implant for bone fixation is provided. The implant includes a head. The implant includes a shaft extending distally from the head. The shaft includes a distal tip. The shaft includes a first set of threads extending a first predetermined length from the distal tip. The first set of threads are configured to capture cortical bone in one of a foot and / or ankle bone of a patient. The shaft includes a second set of threads extending a second predetermined length from the first set of threads. The second set of threads are configured to capture epiphyseal bone in the one of the foot and / or ankle bone. Related methods are also provided.

The utility model provides a double-guide plate for assisting an apical operation, and belongs to the field of dental pulp pathology in oral medicine. The double-guide guide plate comprises a tooth supporting part and a double-guide guide part; the tooth supporting part comprises a tooth supporting guide plate, and the tooth supporting guide plate wraps the surface of a tooth body and is tightly attached to the surface of the tooth; the double-guide part comprises two parallel guide tubes, and the two guide tubes are connected with the tooth supporting guide plate and used for guiding guide legs on the two sides of the dental handpiece. According to the utility model, the dental handpiece can be guided to be accurately positioned and cut; a drill point used in an operation and cortical bones in an operation area cannot be blocked by sight, and observation and water spraying cooling during the operation are facilitated; when the apex flap turning operation is carried out, the opened gingival flap can be put on the tube wall of the guide tube, so that the operation in the operation is facilitated, the damage of traction to the gingiva is reduced, and the soft tissue can be recovered as soon as possible.

The invention discloses an oral implant bone splitting chisel and a use method, the chisel comprises a holding part, a buffer area and a working head part which are distributed in a T-shaped structure; the holding part is a rod body and is provided with an anti-slip structure on the surface, and the axis is vertically and fixedly connected with the axis of the buffer area; the working head comprises a guide face and a guide blade, the splitting blade is of a wedge-shaped structure, a cutting edge is arc-shaped, arc-shaped transition faces are arranged on the two sides of the cutting edge, fillet transition is arranged at the tip end, the thickness of the cutting edge is gradually increased from the tip end to the root portion, and the holding portion and the buffer area are of an integral or detachable structure. The holding stability is improved through the T-shaped structure, bone tissue friction and damage are reduced through the design of the arc-shaped cutting edges and the round corners, the detachable working head can meet the requirements of different operation areas (a straight neck is used for an anterior tooth area, and a bent neck is used for a posterior tooth area), and multi-direction precise bone splitting is achieved; the use method is adaptive to different alveolar bone forms and bone cortex thicknesses, the operation steps are standard and controllable, the cleavage range is effectively controlled, the operation risk is reduced, the safety and convenience of the implant surgery are improved, and the device is suitable for various oral implant bone cleavage surgeries.

The disclosure relates to an intraosseous access device comprising a barrel, a motor, a slide carrier, a rotating stylet assembly, and a handle. The rotating stylet assembly is actuated through the barrel with the slide carrier and rotated by the motor. Elements of the rotating stylet assembly may rotate through the cortex of a bone. The drill may also comprise a shield disposed within the barrel, a slide interface both disposed within a slide channel and attached to the slide carrier, a spring disposed within the barrel, and a removable pivot body attached to both the handle and the barrel.

System for evaluating the fit of a femoral implant (118A, 188B) to a distal end of a femur (32) in a selected orientation before the femur (32) is resected, the system comprising the following elements: - Means of obtaining predefined form factor information for a variety of femoral implants (118A, 188B); - Means of obtaining information about the shape of the surface of the distal end of the femur (32); - Means for automatically performing a virtual fit assessment of each possible incremental position of a predefined set of incremental positions for each size of an implant to be considered (118A, 188B) before the femur (32) is resected; and - Means for selecting an optimal size and position of an implant (118A, 188B) from the virtual fit assessments, characterized in that the means for selection - Means for calculating a maximum lateral runout of an anterior resection of the femur (32) from an outline (220) of a proximal end of the femoral implant, and / or - Means to calculate a percentage of the outline (220) of the proximal end lying on sectioned anterior cortical bone, and / or - Means of calculating a percentage of the outline (220) of the proximal end that lies on or above uncut anterior cortical bone, and / or - Contains means for calculating a maximum gap between the femoral implant and the uncut anterior cortical bone.

The invention relates to a spine osteotomy guide plate which comprises a first body, a second body, a plurality of first osteotomy guide needles and a plurality of second osteotomy guide needles, the first body is provided with a first osteotomy guide face, the second body is provided with a second osteotomy guide face, and the first osteotomy guide face and the second osteotomy guide face are used for osteotomy guide of a spine posterior column; the plurality of first osteotomy guide needles are detachably connected to the first body, extend along the first osteotomy guide surface and are used for increasing the guide distance of the first osteotomy guide surface; the plurality of second osteotomy guide needles are detachably connected to the second body, extend along the second osteotomy guide surface and are used for increasing the guide distance of the second osteotomy guide surface; wherein the first osteotomy guide needle and the second osteotomy guide needle both extend to the cortical bone position of the anterior column of the spine and are used for osteotomy guide of the anterior column of the spine.

The present invention relates to the technical field of orthopedic medical instruments, and relates to an intramedullary nail for percutaneous pelvis internal fixation, comprising an anterior column intramedullary nail and a general intramedullary nail, and being used in cooperation with an external guide frame. A hollow channel is formed in the anterior column intramedullary nail and used for allowing an anterior column screw guide pin to pass through, and the anterior column screw guide pin allows the anterior column intramedullary nail to pass through the acetabular dome and the acetabular anterior wall to the ramus superior ossis pubis; a hollow channel is formed in the general intramedullary nail and used for allowing a transcolumn screw guide pin or a posterior column screw guide pin to pass through, and the general intramedullary nail can be used as a transcolumn screw and a posterior column screw; when the general intramedullary nail is used as a transcolumn screw, the transcolumn screw guide pin allows the transcolumn screw to pass through the acetabular dome and reach the sacroiliac joint along the interior of the greater sciatic notch without passing through the sacroiliac joint; and when the general intramedullary nail is used as a posterior column screw, the posterior column screw guide pin passes through the acetabular posterior wall to the proximal end of the greater sciatic notch without penetrating out of the cortical bone.

The application provides a high-toughness mechanically adaptive bone screw and a preparation method thereof, relates to the technical field of orthopedic implant medical devices, and comprises the following steps: preparing a carbon fiber-polyether ether ketone core mold; preparing a variable-thickness carbon fiber-polyether ether ketone prepreg; conveying the variable-thickness carbon fiber-polyether ether ketone prepreg and an organic film after heat sealing to the surface of the carbon fiber-polyether ether ketone core mold, and layer by layer laying on the carbon fiber-polyether ether ketone core mold to be compacted, molded and prepared into a preform; heating the preform to a specified temperature, extruding and molding through a screw structure mold, and then demolding and heat treating to prepare the bone screw. The application uses the organic film as a toughening layer and designs a coaxial laminated structure, the thickness gradually decreases from the central cylinder to the outer peripheral layer of the screw body, the performance in the aspects of bending fatigue performance and fracture toughness is obviously improved, the relative modulus is significantly lower than that of the bone screw prepared by a traditional scheme, and is closer to the modulus of cortical bone, thereby reflecting the advantages in mechanical adaptation.

The invention discloses a calcaneus osteotomy shifting and measuring device, and belongs to the technical field of medical instruments, the device comprises a fixed support, a movable support arranged on one side of the fixed support, a positioning piece fixedly mounted at one end of the fixed support, and an adjusting structure arranged on the fixed support and the movable support; a hooking piece is arranged at one end of the movable bracket; the adjusting structure comprises a horizontal moving assembly and a longitudinal moving assembly, wherein the horizontal moving assembly is arranged on the fixed support and connected with the movable support, and the longitudinal moving assembly is arranged on the horizontal moving assembly and connected with the movable support. According to the calcaneus osteotomy shifting and measuring device, the two hook bodies are directly inserted into a cortical bone of osteotomy, temporary fixing can be achieved, the operation convenience of a fixing link in an operation is improved, meanwhile, due to the combination of the horizontal moving assembly and the longitudinal moving assembly, shifting in the water direction and adjusting in the longitudinal direction of osteotomy can be achieved, and the operation efficiency is improved. Therefore, the multi-dimensional displacement requirement in the calcaneus osteotomy operation can be met.

This application discloses a method, display method, apparatus, device, and storage medium for determining jawbone features. The method includes: obtaining a radicular bone scan image; segmenting the jawbone based on the radicular bone scan image to determine a segmented jawbone image; using a neural network, taking both the radicular bone scan image and the segmented jawbone image representing the same jawbone location as input, to determine a jawbone feature image and a cancellous bone feature image; comparing the jawbone feature image and the cancellous bone feature image, and determining a cortical bone feature image based on the differences; and determining and outputting cortical bone feature information based on the cortical bone feature image. The method provided in this application can improve the accuracy and efficiency of jawbone feature determination.