416 results about "Bone marrow cavity" patented technology

The present invention provides a two-part telescopic intramedullary orthopedic device comprising a first section inserted into the medullary cavity of one of the fractured or severed bone ends, and secured thereto, and a second section inserted into the medullary cavity of the other fractured or severed bone end and secured thereto, wherein the first section is telescoped within the internal space of the second section, and wherein one of the sections comprises a ferromagnetic material and the other section is either constructed entirely of a non-magnetic material or comprises a ferromagnetic material, wherein the ferromagnetic section(s) are actuable by an external axially directed magnetic field, such that one section may be caused to move axially (either bidirectional or essentially unidirectional) in relation to the other section. In addition, the invention encompasses a method for changing bone length as well as a method for enhancing bone fracture healing.

This prosthesis comprises a humeral or femoral component and an intermediate component. The concave surface of articulation of the humeral or femoral component is formed by a plate connected by a neck to a part of this component adapted to be anchored in the humeral or femoral medullary cavity. The intermediate component is provided with a member for retaining the humeral or femoral component in a position where the plate is in abutment against the first convex surface of the intermediate component. The retaining member defines a non-circular passage in which the neck is adapted to be displaced as a function of the movements of the humeral or femoral component with respect to the other components of the prosthesis. The retaining member defines with the first convex surface of articulation of the intermediate component a volume for receiving a part of the plate projecting radially with respect to the neck.

A bone screw has a flexible shaft which prevents relative movements in the direction of tension, but permits smaller movements in all other directions. The bone screw is configured as a screw insertable into medullary cavities having a curved surface, where the screw adapts to the given contour.

An orthopedic prosthetic implant comprises a metal alloy stem element (13, 63, 113), which has one end portion (19, 69, 119) constructed to reside in the medullary cavity of a bone and an integral connector (23, 73, 123) at the opposite end to which crystalline brittle head (17, 67, 117), preferably made of pyrocarbon-coated graphite, is joined. The head interfaces with human bone, and its effective joinder to the stem element is achieved through a polymeric insert (15, 65, 115) of proportional shape and design which has selected elastic properties. The design and material of the polymeric insert allow it to be securely received within an interior cavity (35, 77, 131) of the pyrocarbon-coated graphite head and mated to the stem connector in an either rigidly or bi-polar arrangement. The method of joinder allows the construction of composite implants that utilize the most desirable properties of metallic and brittle crystalline materials.

A device is provided including a distal nail portion and a proximal nail portion that can be connected to each other to attain a rigid configuration. The device is to be placed internally within the medullary cavities of at least two bones forming a joint to accomplish arthrodesis of the joint. The device is placed intramedullarily in order to minimize incision size, excessive bone resection and post-operative tendon damage and tenderness. Additionally, one particular method for using the device is provided that includes placing and affixing the distal nail in a bone of a joint, placing the proximal nail in another bone of a joint, connecting the distal nail to the proximal nail, doing the desired geometrical adjustments, affixing the proximal nail to the distal nail by tightening the connection and affixing the proximal nail to the other bone of the joint to attain a rigid configuration.

An apparatus has been developed to enable a surgeon to perform multiple orthopedic surgical operations, such as orthopedic surgical resectioning, total joint replacement and fixation of fractures, based on a single reference point. The apparatus is adjustable to conform to the needs and dimensions of individual patients and the surgical procedure(s) to be performed. The apparatus includes a support adapted for insertion into and alignment within the medullary cavity of a patient's bone. The support is capable of expanding into the bone so that the support is fixed within the bone and alignable to the bone. The support may be implanted to align a fractured bone, or extend a distance beyond its fixed position within the medullary cavity to provide a known surgical reference point. The apparatus includes one or more cutting guides mountable on the support and used in performing the desired surgical procedure(s). The cutting guides are positionable with respect to the known surgical reference point created by the support which enables the user to accurately position and secure various instruments at the desired position about the patient's anatomy.

This method comprises the use of a repair equipment including a humeral rod (2) intended to be placed in the medullary cavity of the humerus, comprising at least one hole (6) for receiving a thread (11) for repositioning the tuberosities (101, 102) and for maintaining the latter with respect to the rest of the bone. Said hole (6) is formed in the metaphyseal portion of the humeral rod (2), in the anteroposterior direction thereof; and the repair equipment further comprises a so-called “guying” subassembly (3), to maintain the tuberosities (101, 102) when they re-installed, two second so-called “traction” subassemblies (4), for pulling of the tuberosities (101, 102) one toward the other, and two so-called third “pressing” subassemblies (5), for tackling the tuberosities (101, 102); each of these sub-assemblies comprises a needle and thread (11) connected to this needle, this thread (11) forming a loop.

The invention is directed to a method for treating a tissue or organ in a subject by directly administering an effective amount of an exogenous, decellularized extracellular matrix or a mixture of extracellular matrix and mesenchymal stem cells into the intended site of activity, such as bone marrow cavity. In one embodiment, the invention provides methods of treating bone marrow to increase the number of circulating progenitor and stem cells. In some other embodiments of the invention, the decellularized extracellular matrix to be directly administered is configured to be a time released therapeutic.

A device for safely accessing bone marrow and other tissues is disclosed. Such device comprises a needle assembly, a sensor mechanism, and an actuator configured to engage with the needle assembly via the sensor mechanism to advance a tissue penetrable needle through a first tissue region and into a second tissue region. In one aspect, the first tissue region is a bone cortex and the second tissue region is a bone marrow cavity. The sensor mechanism is configured to disengage the actuator from the needle once the needle has crossed the first tissue region (e.g., bone cortex) into the second tissue region (e.g., bone marrow cavity), thereby preventing the needle from advancing further into the second tissue region. In one aspect, the sensor mechanism is mechanical and comprises a pin assembly comprising a spring-loaded pin that extends through the needle. The pin assembly is configured such that advancement of the distal tip of the spring-loaded pin past the distal tip of the needle causes the actuator to disengage from the needle. The actuator is a rotatable actuator. A catheter-based embodiment of the device can be inserted in body passageways to access tissue internally within the body.

The invention discloses a metal composite material capable of inducing bone growth and an application thereof. The metal composite material is especially suitable for biomedical engineering for human hard tissue defect, comprising an artificial joint, artificial bone, a dental implant, a plastic surgery medical apparatus and instrument, a bone marrow cavity implant and the like. Specifically a double-phase composite material capable of inducing bone growth is provided, a cellular structure is prepared on a clinical medical metal material (titanium, titanium alloy, stainless steel, cobalt-base alloy, nickel-titanium shape memory alloy and the like), magnesium or a magnesium alloy capable of inducing bone growth is filled in the cellular structure, and the composite material in the structure can be used as a solid material, and as the surface/partial structure of a solid metal material. By virtue of the design of the composite material, the bioactivity of an existing medical metal implantable device can be improved; along with the continuous decomposition and bone induction effect of the magnesium or the magnesium alloy in a human body environment, and the bone structure is gradually induced to grow into the cellular structure to enhance the binding strength of the bone tissue with the implant so as to prevent the implant from getting separated, achieve good biological immobilization, and greatly improve the bone integration effect.

An apparatus for intrasosseous injection of medication to the medullary cavity of a jawbone and for the extraction of medullary bone contents is disclosed. It comprises an implant housing component, a drill bit component and a seal plug component. The implant housing component is implanted into the cortical bone of the mandible. The drill bit component produces a hole within the mandible that initiates the implanting of the implant housing component. The seal plug component that is removably attached to the distal end of the implant housing component allows for repeated access of a hypodermic needle into the mandible.

A femoral stem 2 for artificial hip joint is provided that is capable of tightly fixing a greater trochanter and is suitable for treatment of transcervical fracture where it is necessary to fix the greater trochanter. The femoral stem 2 comprising: a stem member 20 including a distal part 21 of the stem member which is inserted in a medullary cavity of a femur and fixed therein and a proximal part 22 of the stem member which has a neck 26 for fixing an artificial head and is positioned at a proximal end of the distal part, the distal part and the proximal part being integrated or separable; a plate fixing portion 36 which is detachably attached at a top of the proximal part; and a greater trochanter plate 3 for depressing the greater trochanter 71, the greater trochanter being fixed to the plate fixing portion 36 at a certain angle or fixed to the plate fixing portion so as to adjust an angle. Since the greater trochanter plate 3 is fixed onto the femoral stem 2 of the present invention, the greater trochanter is tightly fixing and thus the fixation can be stabilized. Furthermore, since the greater trochanter plate 3 is fixed at the top of the proximal part 22, the greater trochanter plate 3 covers the top of the greater trochanter 71 when the greater trochanter 71 is fixed. Therefore upward displacement of the greater trochanter by a gluteus medius musculus can be effectively suppressed.

A method enabling a destroyed part of a joint or joint cartilage to be extracted accurately and at a high speed with a good repeatability and enabling quantitative and simple 3D analysis of the joint and the destroyed part, that is, a method of 3D image processing comprising filling in a medullary cavity region, comprised of a hollow region inside a joint, of a digitalized image of a cross-section of the examined joint using the Expansion and Shrinkage method, performing 3D labeling by a 3D image obtained by stacking digitalized images of cross-sections of the examined joint generated at a step of extracting a contour of the cross-sectional image of the joint or digitalized images of cross-sections of the examined joint not pre-processed, and defining the joint image to be evaluated.

A bone fixture apparatus has an elongate fixture device intended to be inserted in a metaphysical region of a long bone. The device is inserted generally transversely of the direction of the medullary cavity in the bone. The fixture device includes an aperture extending laterally thereof and intended to accommodate an intramedullary nail inserted longitudinally therethrough into the cavity. The fixture device is further formed with an axial aperture intended to receive a securing element capable of insertion therein to firmly engage said nail with the fixture device. Also disclosed is a jig arrangement for locating, relative to a long bone, the bone fixture apparatus.

The invention provides a hand and foot bone defect implant which comprises a defect compensation body and two supporting bodies. The defect compensation body comprises a central rod and an outer sleeve fixedly arranged on the central rod in a sleeving mode. The two ends of the central rod can be inserted in medullary cavities of broken bone on the two sides respectively. The end faces of the two ends of the outer sleeve can be connected with fracture surfaces of the broken bone on the two sides respectively. Cavities used for containing filler are formed in the end faces of the two ends of the outer sleeve. At least one part of the surface of the cavity on each end face is attached to the surface of cortical bone of the corresponding connected broken bone so that the corresponding filler can make contact with the cortical bone. The two supporting bodies are connected with the ends of the central rod respectively. The supporting bodies can make contact with the inner walls of the medullary cavities to support the central rod when the two ends of the central rod are inserted in the medullary cavities of the broken bone. By means of the hand and foot bone defect implant, hand and foot bone defect injuries can be repaired, and therefore the original length of the broken bone can be kept, the risk of amputation is avoided, and part of functions can be kept.

The invention discloses a method and device for determining a medullary cavity anatomical axis based on deep learning, and the method comprises the steps: carrying out the segmentation of a two-dimensional cross section image according to a preset segmentation neural network, and obtaining a bone region corresponding to a medullary cavity through segmentation; performing layer classification on the bone area according to a preset classification neural network, and separating out a medullary cavity layer; determining central points of all medullary cavity layers according to a central point calculation formula; carrying out straight line fitting on the center point, and determining the medullary cavity anatomical axis. The invention aims to provide a high-precision medullary cavity anatomical axis determination mode.