68 results about "Tubular bone" patented technology

An integrated scaffold for bone tissue engineering has a tubular outer shell and a spiral scaffold made of a porous sheet. The spiral scaffold is formed such that the porous sheet defines a series of spiral coils with gaps of controlled width between the coils to provide an open geometry for enhanced cell growth. The spiral scaffold resides within the bore of the shell and is integrated with the shell to fix the geometry of the spiral scaffold. Nanofibers may be deposited on the porous sheet to enhance cell penetration into the spiral scaffold. The spiral scaffold may have alternating layers of polymer and ceramic on the porous sheet that have been built up using a layer-by-layer method. The spiral scaffold may be seeded with cells by growing a cell sheet and placing the cell sheet on the porous sheet before it is rolled.

A Bone screw for anchoring a marrow nail with transverse bores in a tubular bone. The bone screw had a thread with a pitch S, a core diameter D1 and outer diameter D3. The screw supports the marrow nail with a middle part and is fixed in the bone with a distal part. The thread has a flat cylindrical thread base with a length l>0.3 S. In addition, a second thread with the same pitch S and with the core diameter D1 is present in a proximal head part, but has a greater outer diameter D2>D3 in order to proximally achieve a fixing with a greater thread profile.

An implant for the purpose of osteosynthesis, for the immobilization and stabilization of tubular bones, especially of tubular bones that have a fracture or an osteotomy, especially of rib bones, comprises at least a first implant component that has an attachment section with means of attachment for the purpose of attaching the first implant component to a tubular bone, especially in a region of the tubular bone close to a fracture or osteotomy. The first implant component further has a connection section, with the connection section being formed for insertion of a second implant component and immobilization of the second implant component in a position adjustable relative to the first implant component. The connection section comprises a guide device for the purpose of guiding the second implant component as the second implant component is being positioned relative to the first implant component. The guide device permits movement of the second implant component relative to the first implant component only in one direction relative to a longitudinal axis of the connection section. A third implant component, which matches the first implant component in functionality, is attached to the other end of the second implant component.

A bone plate for use in anterior lumbar spinal fixation has interlocking components to prevent dislodgement of the plate due to anatomical forces. The exposed surface of the plate is smooth to prevent trauma to internal body tissue. The plate spans the intervertebral space with each end attached to an adjacent vertebrae by locking screws threadably engaged with tubular bone anchors. The bone anchors include helical members are threaded through the bone plate and inserted into holes within the bone. The plate has a countersunk cavity including portions overlapping the locking screws. A locking cap fits in the cavity to secure the other end of the locking screws from backing-out of the plate. The locking cap includes at least two chamfered portions that cooperate with mating recesses in the countersunk cavity of the bone plate.

A longitudinal minimal-invasion bone cutter for tubular bones comprises a bone cutting end bone cutting device and far end positioning devices. The bone cutting end bone cutting device is slidingly sleeved on a positioning adjusting guide rail which is in a long-strip shape, a sliding groove is arranged in the middle of the positioning adjusting guide rail along the length direction, and scales of the positioning adjusting guide rail are arranged along the sliding groove. The far end positioning devices are symmetrically sleeved at two ends of the positioning adjusting guide rail slidingly. By means of the longitudinal minimal-invasion bone cutter, medical workers can perform longitudinal bone cutting operations on the tubular bones according to treatment needs, and the longitudinal minimal-invasion bone cutter is convenient to operate. When the operations are performed, the longitudinal minimal-invasion bone cutter provides convenience for transverse traction of bone blocks and meets needs of angiitis treatment. The bone cutting operations performed by the aid of the longitudinal minimal-invasion bone cutter belong to minimal-invasion operations, do not damage nerves, blood vessels, soft tissues and periostea, have small invasion, facilitate reconstruction and union of bones, and meet needs of longitudinal traction treatment of the tubular bones. By means of the longitudinal minimal-invasion bone cutter, safety and accuracy of the longitudinal bone cutting operations of the tubular bones are improved, medical workers can conveniently perform the operations, and the operation effect is guaranteed.

The invention relates to an implant for at least partially creating, recreating or stabilizing vertebral bodies or tubular bones. In said implant, a metallic, nonmetallic or ceramic hollow body is coated with an active substance complex or comprises said active substance complex. This active substance complex comprises the following components which differ from one another and which are specifically adapted for creating bone: at least one structural component based on extracellular material which is specifically adapted to the cells of the bone which is to be created, at least one recruiting component, at least one adhesion component, and at least one growth and / or maturation component.

A medical implant plate including at least two sets of apertures through an elongated shaft body to individually accommodate and orient set screws or pegs at various angles that may be selected depending on application, i.e., the apertures don't have fixed angled, but allow for a range of angles. Once the screw has been locked, the device becomes a fixed angled device. The screws or pegs laterally spaced relative to each other to resist torsion and to secure the plate against dislodgement. The body also includes a flared-end portion that accommodates and extends partially onto a metaphysis of a tubular bone of the hand while maintaining a low-profile to avoid soft-tissue irritation. The flared-end portion that extends on to the metaphysis does NOT have holes for screws but serves as a buttress. Screws that extend into the metaphysis come from the three holes located along the slightly angled portion of the plate.

A bone plate for use in anterior lumbar spinal fixation has interlocking components to prevent dislodgement of the plate due to anatomical forces. The exposed surface of the plate is smooth to prevent trauma to internal body tissue. The plate spans the intervertebral space with each end attached to an adjacent vertebrae by locking screws threadably engaged with tubular bone anchors. The bone anchors are threaded into the vertebrae and have a reduced diameter leading end which the locking screws expand to lock the anchor in the vertebrae and secure the end of the locking screw in the anchor. The plate has a countersunk cavity including portions overlapping the locking screws. A locking cap fits in the cavity to secure the other end of the locking screws from backing-out of the plate.

The present application relates to an implant for tubular bones and to a method for treating fractures of tubular bones. The implant is used to connect two parts of a tubular bone that has broken with a substantially smooth break. The implant is formed by a shaped piece that is inserted into the medullary cavity of a broken tubular bone. The shaped piece has at least one through-opening, which has a substantially constant internal diameter and extends substantially through the shaped piece and through which a cord can be pulled in order to stabilize the fracture. The shaped piece is made of resorbable material, and two anchor parts can be secured on the cord. The anchor parts fix the cord to the bone, and the shaped piece exploits the principle of an internally braced stack in order to press the fracture surfaces of the bone against each other.

A tubular spacer and a method for the manufacture of the spacer is described. The tubular spacer has a first rim on a first end, a second rim on its opposite second end, and a jacket extending between said first and said second rims. The jacket has a tapered section adjacent to at least one end. The spacer is suitable for use in tubular bone surgery where it is necessary that the spacer adapts to different bone cross-sections. To make this tubular spacer, a cylinder having a tubular jacket body is expanded and / or narrowed at one or both of its ends. Methods for using the spacer as well as kits for making the spacers are described.

A longitudinal minimal-invasion bone cutter for tubular bones comprises a bone cutting end bone cutting device and far end positioning devices. The bone cutting end bone cutting device is slidingly sleeved on a positioning adjusting guide rail which is in a long-strip shape, a sliding groove is arranged in the middle of the positioning adjusting guide rail along the length direction, and scales of the positioning adjusting guide rail are arranged along the sliding groove. The far end positioning devices are symmetrically sleeved at two ends of the positioning adjusting guide rail slidingly. By means of the longitudinal minimal-invasion bone cutter, medical workers can perform longitudinal bone cutting operations on the tubular bones according to treatment needs, and the longitudinal minimal-invasion bone cutter is convenient to operate. When the operations are performed, the longitudinal minimal-invasion bone cutter provides convenience for transverse traction of bone blocks and meets needs of angiitis treatment. The bone cutting operations performed by the aid of the longitudinal minimal-invasion bone cutter belong to minimal-invasion operations, do not damage nerves, blood vessels, soft tissues and periostea, have small invasion, facilitate reconstruction and union of bones, and meet needs of longitudinal traction treatment of the tubular bones. By means of the longitudinal minimal-invasion bone cutter, safety and accuracy of the longitudinal bone cutting operations of the tubular bones are improved, medical workers can conveniently perform the operations, and the operation effect is guaranteed.

The intramedullary fixation device for use in fixing the relative position between a tubular bone and an adjoining bone has, according to the present invention, an intramedullary nail that is inserted into the medullary canal of the tubular bone whose position is to be fixed, an elongated blade for insertion into the adjoining bone whose position is to be fixed relative to that of the tubular bone, a coupling element for fixing and locking the relative position of the nail and blade after their insertion, and a means for locating and positioning within the bones to-be-treated the nail and blade. Furthermore, the blade has a cross-sectional shape that is configured in consideration of the geometry of the bone into which the blade is to-be-placed and so as to enhance the ability of the blade to stabilize the bone, and these elements are configured so that they do not have to be decouple during the process of inserting the nail and blade.

An internal saw for osteotomy of tubular bones, comprising a base body, provided with a saw blade, which is moved radially out of the base body, whereby the base body, in particular the saw blade may be driven to oscillate radially.

The invention relates to a bone grafting device for tubular bone defect healing, and belongs to the technical field of orthopedic medical devices. The bone grafting device is used for grafting tubular bones to promote the healing of the tubular bones, and comprises an outer sleeve, an inner sleeve and a connecting rod, wherein the inner diameter of the outer sleeve is matched with the outer diameter of the two ends of a tubular bone defect part required for bone grafting, and the inner sleeve is positioned in the outer sleeve; the connecting rod is inserted in the inner sleeve, and the diameter of the connecting rod is matched with the inner diameter of the inner sleeve; and the length of the connecting rod is greater than that of the inner sleeve, and the inner sleeve and the outer sleeve are made of biodegradable magnesium alloy. In the bone grafting device, the connecting rod in the inner sleeve can firmly connect the two ends of a defective tubular bone, a high-quality autologous cancellous bone is filled between the inner sleeve and the outer sleeve to simultaneously play roles of bone grafting and reinforced fixing, and the biodegradable magnesium alloy has a function of inducing bone formation, thereby the fracture healing is promoted. The bone grafting device has the advantages of firm bone grafting, high intensity, early ambulation for patients, and good clinical effect.

FIG. 1 shows an inventive implant 1. It has a central fillet 2 extending along a longitudinal axis L. The fillet 2 has openings 3 which are formed at regular intervals. At the level of the openings 3 and extending at right angles on both sides are clamps 4, which, when the implant is inserted, are brought into mutual engagement with a tubular bone and clamped to it. The fillet 2 is formed so as to be bendable in three-dimensions. It can be bent in two planes relative to the longitudinal axis L of the fillet 2 and torqued about the longitudinal axis L. Thus, a simple implant 1 with an overall regular structure is provided which can be cut with a cutting pliers to a desired length.

An osteosynthesis system for treating fractures of tubular bones includes an intramedullary nail with an elongated nail body consisting of a hard metal material with two end sections and a middle section therebetween that has at least one transverse screw hole close to the end for screwing in at least one bone screw into each end section. The nail body is solid or has a through-channel arranged in the center in the cross-section of the nail body. In the middle section at least two transverse one-sided screw holes are placed proximate to a fracture. Screw holes are formed as inlays made out of soft metal material securely joined to the nail body, and bone screws with an initial thread consisting of hard metal material that can be screwed into the bone and screw holes while forming threads.

An osteosynthesis system for treating fractures of tubular bones includes an intramedullary nail with an elongated nail body consisting of a hard metal material with two end sections and a middle section that has at least one transverse screw hole close to the end for screwing in at least one bone screw into each end section. The nail body has a through-channel for pushing through a guide element, in the middle section on the side of the through-channel with the lowest wall thickness, at least two transverse one-sided screw holes for screwing in bone screws are placed proximate to a fracture, all one-sided screw holes are formed as inlays made out of soft metal material securely joined to the nail body, and bone screws with an initial thread consisting of hard metal material that can be screwed into the bone and screw holes while forming threads.

The invention relates to a prosthesis for at least partial replacement of a tubular bone and of an adjacent joint, comprising an elongate shaft (1) with a first end and a second end, and a joint mechanism (2) arranged at the second end of the shaft (1), wherein a length-adjusting mechanism (3) is provided which actuates the shaft (1) along the axis (10) thereof in the manner of a telescope.

A locking nail for treating fractures of tubular bones has two parallel cross-bores that are axially spaced apart provided on the distal end of said nail and optionally at least one additional cross-bore is provided on the proximal end thereof for receiving bone screws. The nail includes a groove which is parallel to a longitudinal axis of the nail is formed into the outer side of the nail. The groove extends into the distal bores on both sides and merges into the bore. The longitudinal axis of the groove intersects the axis of each cross-bore.

The invention discloses a method for preparing a novel individual degradable artificial intraosseous stent, which belongs to the technical field of biomedicine. The method comprises the following steps of making a light-cured resin mold of which the form is consistent with the marrow cavity of a tubular bone massive comminuted fracture segment by using a rapid forming technology; and pouring an artificial intraosseous stent by using a compound material. The stent has the advantages of easiness in operating, reliable curative effect, high bone healing speed and small quantity of complications when applied to operation of tubular bone massive comminuted fractures, can be particularly applied to treatment of comminuted fractures of tubular bone metaphysis, and has very high potential clinical application value.

Medullary pin (1) for a distraction with segment transport and subsequent lengthening of a tubular bone, wherein the medullary pin (1) comprises: an at least partly hollow body (3) extending in an axial direction of the medullary pin (1), a locking means for locking the body (3) in a first end fragment (5) of the tubular bone, a first inner part (7), which is arranged displaceably in the axial direction inside the body (3) and comprises a first fixation means for the fixation of a middle fragment (15) of the tubular bone, a second inner part (17), which is arranged displaceably in the axial direction inside the body and comprises a second fixation means for the fixation of a second end fragment (25) of the tubular bone, and a drive unit (40) for the axial displacement of the first inner part (7) relative to the second inner part (17), wherein the drive unit (40) is arranged inside the body (3) between the first fixation means of the first inner part (7) and the second fixation means of the second inner part (17).

The present application relates to an implant for tubular bones and to a method for treating fractures of tubular bones. The implant is used to connect two parts of a tubular bone that has broken with a substantially smooth break. The implant is formed by a shaped piece that is intended to be inserted into the medullary cavity of a broken tubular bone. The shaped piece has at least one through-opening, which has a substantially constant internal diameter and extends substantially through the whole of the shaped piece and through which a cord can be pulled in order to stabilize the fracture. The shaped piece is made of resorbable material, and two anchor parts can be secured on the cord. The anchor parts are intended to fix the cord to the bone, and the shaped piece is intended to exploit the principle of an internally braced stack in order to press the fracture surfaces of the bone against each other.

The invention discloses an artificial hip joint thighbone end prosthesis which comprises a head ball, a full thighbone neck, a full hollow thighbone narrow cavity handle and a thighbone neck inner short handle, wherein the ball head is arranged on the upper end part of the full thighbone neck; the upper end of the full hollow thighbone narrow cavity handle is connected to the outer side of the bottom surface of the full thighbone neck; the thighbone neck inner short handle is arranged at the inner side of the bottom surface of the full thighbone neck; and the full hollow thighbone narrow cavity handle consists of a uniform cross-section tubular upper part and a swallow-tail form tubular lower part. The artificial hip joint thighbone end prosthesis utilizes the full hollow thighbone narrow cavity handle to replace a half hollow thighbone narrow cavity handle of the prior art , thus a swallow-tail form lower end on the full hollow thighbone narrow cavity handle can be inserted into a tubular bone area of a thighbone narrow cavity of a patient. Because the contact area of the full hollow thighbone narrow cavity handle and the thighbone narrow cavity is large and the full hollow thighbone narrow cavity handle is more deeply inserted into the thighbone narrow cavity, the stability of the prosthesis can be increased so as to prolong the service life of the prosthesis and reduce the overhaul rate and the pain of patients.