16 results about "Metaphysis" patented technology

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 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.

The present invention relates to a mechanical implant for hip and shoulder arthroplasty. The mechanical implant comprises a neck (1) and an end (2), the end (2) which enters into a cavity in the patient's bone and terminates with a movable mechanical part (3) which fits into the metaphysis of the femur or humerus, and the end (2) terminates with two movable parts (4) to fit the end (2) into the neck (1). The two parts of the neck (1) and the movable mechanical part (3) are joined by a screw (5). The present invention enhances stability and facilitates the replacement of the neck (1) in the event of revision.

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.

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 invention relates to a positioning device (100) for implantation of prosthesis in a long bone, in particular for implantation of humeral prosthesis, comprising: at least one centering element (101) with a channel (102) configured to house an intramedullary nail (11); a support element (103) configured to hold a reference mask (200) on a plane (12) at a resected metaphysis of the long bone; an adjustment element (104) configured to connect the centering element (101) and the support element (103), wherein the adjustment element (104) further comprises a displacement device (105) configured to provide a controlled offset to the support element (103) for displacing the reference mask (200) over the plane (12) of the resected metaphysis.

This invention belongs to the field of medical device technology and discloses a universal distraction and reduction device for metaphyseal fractures, including a connecting cylinder and a limiting cylinder. The connecting cylinder and the limiting cylinder are connected to several connecting frames. The connecting cylinder and the limiting cylinder are rotatably connected to a nut. The nut is threadedly connected to a distraction rod. The distraction rod is rotatably connected to a worm gear. The worm gear is connected to a transverse connecting structure. The transverse connecting structure is movably connected to a needle holder. The needle holder is detachably connected to a needle. This solution achieves precise "universal" reduction of the metaphysis through multi-degree-of-freedom adjustment, including axial extension, planar rotation, sliding, and arc-shaped trajectory. It is flexible in operation and features a self-locking and double-locking structure to ensure intraoperative stability and reliability. The symmetrical arc-shaped groove design conforms to anatomical morphology and adapts to different left and right access methods, significantly improving surgical efficiency and reduction quality.

A stemless implant for shoulder arthroplasty includes a body having a proximal portion, distal portion, and an outer surface. A cylindrical extrusion is substantially perpendicular to and adjacent the proximal portion. At least a portion of the outer surface is configured to contact bone, the outer bone contacting surface comprising a concave taper. The stemless implant can be sized and shaped for insertion into a metaphysis of a humerus bone without penetrating a diaphysis of the humerus bone. The implant optionally comprises a medial fin, a lateral fin, an anterior fin, and a posterior fin. The medial fin and lateral fin may be thicker than the anterior fin. The fins may taper from the proximal portion to the distal portion.

A stemless implant for shoulder arthroplasty includes a body having a proximal portion, distal portion, and an outer surface. A cylindrical extrusion is substantially perpendicular to and adjacent the proximal portion. At least a portion of the outer surface is configured to contact bone, the outer bone contacting surface comprising a concave taper. The stemless implant can be sized and shaped for insertion into a metaphysis of a humerus bone without penetrating a diaphysis of the humerus bone. The implant optionally comprises a medial fin, a lateral fin, an anterior fin, and a posterior fin. The medial fin and lateral fin may be thicker than the anterior fin. The fins may taper from the proximal portion to the distal portion.

The application provides a metaphyseal prosthesis, comprising: a main body part; a connecting part arranged at one end of the main body part and capable of moving along the axial direction of the main body part; and an adjusting structure, the adjusting structure comprising an adjusting rod and an adjusting ring, the adjusting rod being arranged on the main body part, and the adjusting ring being rotatably arranged on the adjusting rod and capable of moving relative to the adjusting rod when the adjusting ring rotates to drive the connecting part to move, so as to adjust the distance between the main body part and the connecting part. The technical scheme of the application effectively solves the problem in the prior art that the metaphyseal prosthesis is difficult to adjust the length, thereby resulting in poor universality.

The invention discloses a tibial plateau fracture minimally invasive bone fracture plate with a universal locking structure, and belongs to the technical field of medical instruments, the tibial plateau fracture minimally invasive bone fracture plate comprises a bone fracture plate body, the bone fracture plate body comprises a tibia plate body, a metaphysis plate body and a backbone fixing plate from top to bottom, a first universal locking hole, a second universal locking hole and a third universal locking hole are formed in one side of the tibia plate body, one side of the metaphysis plate body and one side of the diaphysis fixing plate in a penetrating mode, locking threaded sleeves are arranged on the inner wall of the first universal locking hole, the inner wall of the second universal locking hole and the inner wall of the third universal locking hole, and a kirschner wire positioning hole is formed in one side of the tibia plate body in a penetrating mode. The tibia plate body, the metaphysis plate body and the diaphysis fixing plate are integrated, so that the bone fracture plate can adapt to the tibia plateau, the metaphysis and the diaphysis part, the fitting degree with the tibia metaphysis is improved, and it is ensured that the bone fracture plate is tightly attached to the bone surface; the universal locking holes are formed in the segments of the bone fracture plate body, and the locking threaded sleeves and the multi-angle locking screws are matched, so that the implanting angle of the screws is flexibly adjustable.

The invention relates to a mechanical implant for hip or shoulder joint replacement. The mechanical implant consists of a neck part (1) and an end part (2), wherein the end part (2) can be inserted into a medullary cavity of a bone of a patient; a movable mechanical part (3) is arranged at the tail end of the end part (2) and is matched with the metaphysis of the femur or the humerus; furthermore, the implant comprises two movable parts (4) for fitting the end (2) to the neck (1). And the neck part (1) and the movable mechanical part (3) are connected and fixed through a screw (5). According to the invention, the stability can be improved, and the neck part (1) is easier to replace during revision surgery.

A humeral implant is provided. The implant includes a humeral stem including a plurality of fins. At least one fin comprises a serrated bottom edge. A radial distance between an inner bottom edge of the at least one fin and a centerline of the humeral implant increases along a distal length of extension of the at least one fin. At least the serrated bottom edge of the at least one fin is configured to cut into and compact bone of the metaphysis of a humerus toward relatively denser cancellous bone of a peripheral portion of the humerus when press-fit therein, thereby providing sufficient press-fitting for cementless fixation of the humeral stem into the humerus. Related kits and methods are also provided.

The utility model discloses an interphalangeal joint surface replacement prosthesis which comprises a near-end phalanx surface prosthesis, and a near-end phalanx fixing part is arranged on the side portion of the near-end phalanx surface prosthesis and used for being fixed to the radial back side bone surface or the ulnar back side bone surface of the near-end phalanx metaphysis. A far-end phalanx fixing part is arranged on the side part of the far-end phalanx surface prosthesis and is used for being fixed on the median bone surface of the back side of the far-end phalanx metaphysis; the far-end end face of the near-end phalanx surface prosthesis and the near-end end face of the far-end phalanx surface prosthesis are each provided with a curved surface part, so that the far-end phalanx surface prosthesis can rotate relative to the near-end phalanx surface prosthesis, and the prosthesis and the side portion of the phalanx are connected and fixed through the near-end phalanx fixing part and the far-end phalanx fixing part. The mode of fixing through the intramedullary cavity is avoided, fixing can be conducted without bone cement, and serious complications such as deep medullary cavity infection are avoided.

A cerclage device configured for fixation of at least one bone portion and / or tissue of a subject's shoulder is disclosed. The cerclage device comprises an elongate member having a medial end and a lateral end. The cerclage device is configured to be irreversibly secured relative to the at least one bone portion and / or tissue when the medial end and / or the lateral end are moved in a fastening direction. The cerclage device may be coupled with a metaphyseal component or humeral prosthesis implanted in the subject's shoulder. A method for cerclage fixation of at least one bone portion and / or tissue of a subject's shoulder using a cerclage device is also disclosed. A cerclage device and method for cerclage fixation of at least one bone portion and / or tissue of a subject's body is also disclosed. The cerclage device may be coupled with a fixation support implanted in the subject's body.

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.