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37 results about "Articular facet" patented technology

The facet line (FL) was defined as the line passing between the anteromedial and posteromedial margin of the bilateral superior articular facet. The investigation of the role of the facet joint angle in the development of L5-S1 spondylolysis in young men

Facet implant

The present invention relates to prostheses for treating spinal pathologies, and more specifically to a system and method for treating articulating surfaces of facet joints. The system includes a superior implant for placement on a superior articulating surface and an inferior implant for placement on an inferior articulating surface. In addition, described is a method for providing articulating surfaces for facet joint articular facets, as well as various types of rasps used to prepare such surfaces.
Owner:LANTERNA MEDICAL TECH

Cervical facet resurfacing implant

The present invention relates to prostheses for treating spinal pathologies, and more specifically to a system and method for treating articulating surfaces of cervical vertebrae facet joints. The system includes a superior implant for placement on a superior articulating surface and an inferior implant for placement on an inferior articulating surface. In addition, described is a method for providing articulating surfaces for cervical vertebrae facet joint articular facets.
Owner:LANTERNA MEDICAL TECH

Spine microsurgery techniques, training aids and implants

A minimally invasive, fluoroscopically guided system is disclosed for stabilizing the articular facet joints of adjacent vertebrae. Ring and dowel implants are disclosed for installation into the facet joint. The invention includes a novel spine surgical training aid used in the initial surgeon training process for refreshing the surgeon's perspective of the critical three dimensional anatomy of the vertebrae. The invention also includes a surgical kit having a range of size-specific drills, inserters, impactors and custom-length long k-wires matched to the internal diameter of the instrumentation system.
Owner:BARRY RICHARD J

Method for resurfacing a cervical articular facet

Methods for treating spinal pathologies, and more specifically methods for treating articulating surfaces of facet joints of cervical vertebrae. The methods involve providing artificial articulating surfaces for facet joint articular facets. In addition, various types of rasps may be used to prepare the articulating surfaces prior to placement of the artificial articulating surfaces.
Owner:LANTERNA MEDICAL TECH

Orthopedic fixation mechanism

A fixation mechanism and method of fixation, such as the fixation of a facet resurfacing implant to an articular facet of a spinal vertebra. The fixation mechanism includes a securing mechanism having a socket configured to receive a knob of a biologic implant. The fixation mechanism further includes a locking mechanism for limiting expansion of the socket following engagement with the knob of the implant.
Owner:LANTERNA MEDICAL TECH

Bone pads

ActiveUS20140257293A1Accurate tolerance profileEasy to fixSurgeryJoint implantsArticular surfacesArticular surface
Disclosed herein are systems and methods for bone preparation with designed areas having accurate tolerance profiles to enable improved initial fixation and stability for cementless implants and to improve long-term bone ingrowth / ongrowth to an implant. A method of preparing a bone surface to receive a prosthetic implant thereon having an articular surface and a bone contacting surface includes resecting the bone surface at a first location to create a first resected region having a first tolerance profile with a first cross-section, resecting the bone surface at a second location to create a second resected region having a second tolerance profile with a second cross-section less dense than the first cross-section, and contacting the bone contacting surface of the prosthetic implant with the first resected region.
Owner:STRYKER CORP

Mis patellar preparation

Instruments and a method for preparing the articular surface of the patella to receive a patellar implant are utilized without everting the patella. A medial or lateral parapatellar incision and an anterior midline incision are made adjacent the patella. The patella is clamped with a patella clamp, a hole is drilled from the anterior surface of the patella. A reamer is inserted through the medial or lateral parapatellar incision and is then attached to the end of a drive shaft that extends outwardly beyond the articular surface of the patella. The posterior facing cutting surface of the reamer device is then placed in contact with the articular surface. The drive shaft is then rotated and moved anteriorly causing the cutting surface of the reamer device to remove a desired amount of patellar cartilage and bone to accommodate a patellar component. The patellar component is secured into place by aligning a central peg protruding from the top surface of the patellar component with the previously drilled hole in the patellar remnant.
Owner:HOWMEDICA OSTEONICS CORP

Medial femoral single condyle prosthesis, lateral femoral single condyle prosthesis, and femoral trochlea prosthesis

PendingCN107280817ASimplified Design Parameter ValuesJoint implantsKnee jointsArticular surfacesArticular surface
The invention discloses a medial femoral single condyle prosthesis (201), a lateral femoral single condyle prosthesis (301), and a femoral trochlea prosthesis (401). The medial femoral single condyle prosthesis comprises an articular surface which is a surface making contact with the medial patella and the medial tibial plateau during the knee joint motion process, wherein the articular surface is presented as a segmental arc (203) on a first ellipse (38) on the sagittal position, and is presented as a segmental arc (95) on a first circle (94) on a coronal position; and an inside surface, which is the part adjoining femoral condyle cut bone surface and bone cement after prosthesis implantation, and is presented as a medial posterior condyle (202) with a straight line section and a medial distal end (209) consistent with the segmental arc (203). The prosthesis can be closer to the geometric shape of the normal human femoral condyle, and design parameter values of femoral prostheses of various types are simplified.
Owner:温晓玉

Prosthetic implant and associated instruments

A prosthetic implant comprises an articular surface and a bone contacting surface. The articular surface has a first concavity extending along a first curved axis and the bone contacting surface has a convexity extending along a second curved axis. Geometric relationships between the concavity of the articular surface and convexity of the bone contacting surface are described. A resulting feature of this implant is a bone contacting surface including both planar and non-planar geometries. Instrumentation and a method for the preparation of the non-planar bone surface are also described.
Owner:HOWMEDICA OSTEONICS CORP

Talus prosthesis

The invention relates to a talus prosthesis which comprises a complete talus prosthesis body. The complete talus prosthesis body comprises a nonmetallic material part on the upper side and a metal material part on the lower side. The nonmetallic material part and the metal material part can be combined and assembled. The nonmetallic material part comprises a trochoid articular facet and a medial malleolus articular facet. The metal material part comprises a subtalar articular facet. The nonmetallic material part or the metal material part comprises a talonavicular articular facet. Four to fivefastening nail channels are arranged on the metal material part. The subtalar articular facet and / or the talonavicular articular facet is / are of a porous bone trabecula structure or is / are provided with hydroxyapatite coatings. Due to the detachable nonmetallic material part and the detachable metal material part, replacement during revision is facilitated; the porous bone trabecula structure orthe hydroxyapatite coatings are adopted for the areas adjacent to bones, and bone fusion can be promoted; the gap outside a talus bone and a calcaneal bone is filled with a protruding part A, and stability is improved.
Owner:WEST CHINA HOSPITAL SICHUAN UNIV

Method for multi-layer spiral CT three-dimensional rebuilding measuring humeral head eccentricity

The invention provides a method for a multilayer helix CT 3D reconstruction measurement humeral head excentricity, putting the humerus sample or the shoulder joint sample or the human body on the examining table. The multilayer helix CT scanning is used to obtain the humerus 3D reconstruction image, while the inner and external epicondyle of the humerus is adjusted to be at the same coronal position as the normal presentation (or the superposition of the inner and external epicondyle is the lateral position). The connecting line, wherein the radian curvature of the humerus normal presentation (or the lateral position) facies articularis capituli changes most evidently, is the humeral head normal presentation (or the lateral position) articular facet diameter CD. The circle drawing fitting facies articularis capituli arc line is used as the facies articularis capituli diameter bisecting normal EF, to line out the diameter and the center O on the bisecting normal, obtain the humerus facies articularis capituli normal presentation (or the lateral position) center of rotation O. About the middle piece of the humerus is taken for 130 mm to seek the humerus axel wire L. The humerus center of rotation O makes the normal toward the axel wire L of the middle piece of the humerus, to obtain the excentricity OA at the inner of the humerus (or the excentricity OB at the rear side). The method can not be affected by the scanning attitude, which is a faster, simpler and more accurate method.
Owner:THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA

Design method of kneecap prosthesis

The invention discloses a design method of a prosthesis so as to meet motion functions and biological functions of kneecaps, and achieve the purpose of semi-kneecap prosthesis exchange. The design method of the prosthesis comprises the steps of obtaining high-precision three-dimensional raw data of the knee joint of a patient through CT or MRI, and constructing a kneecap three dimensional model bya reverse engineering method; and according to the feature points of the kneecaps, constructing the cutting plane of the kneecap three dimensional model, and by using the cutting plane, cutting the kneecap three dimensional model to obtain a three dimensional model A1 designed according to the prosthesis and a kneecap reserving band A2; and based on A1, designing a protrusion A3 on the cutting plane, and besides, based on A2, designing a groove A4 corresponding to the A3 in the position same as the cutting plane, to obtain a semi-kneecap prosthesis fixing structure. The semi kneecap prosthesis material is polyetheretherketone. A mold adopting a material increasing manufacturing method, a conventional manufacturing method or a combination of the material increasing manufacturing method andthe conventional manufacturing method is adopted for manufacturing the personalised kneecap prosthesis. Through an injection molding method, a high strength prosthesis structure and a high surface finish kneecap prosthesis articular facet are obtained.
Owner:重庆熙科医疗科技有限公司

Device and Method for Treatment of Spondylotic Disease

A device for treatment of spondylotic disease includes a distractor for distracting vertebral facets of first and second vertebrae located adjacent each other. The distractor includes a first abutment surface for interfacing with an inferior articular facet of the first vertebra. The distractor also includes a second abutment surface for interfacing with the superior articular facet of the second vertebra corresponding to the inferior articular facet of the first vertebra. The first and second abutment surfaces of the distractor engage with each other and are separated by a predetermined distance.
Owner:GOEL ATUL

Improved partial endoprosthesis device for vertebral joint

PendingCN111526827AMaintain physical activityFix main stability issueInternal osteosythesisSpinal implantsOsseointegrationArticular facet
A partial endoprosthesis device (11) for preserving the motion of a vertebral joint for implant into a spinal segment (10) comprising an articular portion (13) being elongated along a longitudinal axis (14) with a first face (15) and a second face (17) opposite to the first face (15), the first face comprising a central protrusion (18) having a height (H), with respect to the face, and a surface (16) of an osteointegrable material. The protrusion is configured so that, by implanting the device (11) with the articular portion (13) inserted between an upper articular facet (3') of a lower vertebra (10') and a corresponding lower articular facet (3'') of upper vertebra (10") adjacent to the lower vertebra, and with the first face (15) in contact with a first articular facet selected between the upper articular facet (3') and the lower articular facet (3''), and with the second face (17) in contact with a second articular facet respectively with the lower articular facet (3'') and with theupper articular facet (3'), it is obtained that the articular portion (13), with the first face (15), pushes against the first articular facet and finally becomes integral by osteointegration with the lower articular facet (3'') and, with the second face (17), slidingly engages with the lower articular facet (3').
Owner:G&G公司 +2

Adjustable position trial component with drill guide

An exemplary trial component is configured to be attached to a resected bone having a resection surface, and includes a body portion and a sliding fastening mechanism movably coupled to the body portion. The body portion has an articular surface, a bone-facing surface, and at least one drill guide extending through the articular surface and the bone-facing surface. The sliding fastening mechanismincludes at least one post extending beyond the bone-facing surface, and the post is operable to engage the resection surface to retain the position of the sliding fastening mechanism relative to thebone. When attached to the bone, the trial component is structured to selectively retain the position of the body portion relative to the bone, and to selectively permit adjustment of the position ofthe body portion relative to the bone.
Owner:SMITH & NEPHEW INC

Glenoid arthroplasty and offset reamers

Arthroplasty components include an articular surface and a bone-facing surface. The bone-facing surface bears at least one anchoring element adapted for an oblique implantation trajectory. The articular surface includes a larger radius of curvature in the superior-inferior direction than in the anterior-posterior direction. An inferior chamfer may be present on the articular surface. Instruments and implantation methods are also disclosed. Reamers include reamer heads coupled to various offset shaft configurations.
Owner:CATALYST ORTHOSCI INC

Method for multi-layer spiral CT three-dimensional rebuilding measuring humeral head eccentricity

The invention provides a method for a multilayer helix CT 3D reconstruction measurement humeral head excentricity, putting the humerus sample or the shoulder joint sample or the human body on the examining table. The multilayer helix CT scanning is used to obtain the humerus 3D reconstruction image, while the inner and external epicondyle of the humerus is adjusted to be at the same coronal position as the normal presentation (or the superposition of the inner and external epicondyle is the lateral position). The connecting line, wherein the radian curvature of the humerus normal presentation (or the lateral position) facies articularis capituli changes most evidently, is the humeral head normal presentation (or the lateral position) articular facet diameter CD. The circle drawing fitting facies articularis capituli arc line is used as the facies articularis capituli diameter bisecting normal EF, to line out the diameter and the center O on the bisecting normal, obtain the humerus facies articularis capituli normal presentation (or the lateral position) center of rotation O. About the middle piece of the humerus is taken for 130 mm to seek the humerus axel wire L. The humerus center of rotation O makes the normal toward the axel wire L of the middle piece of the humerus, to obtain the excentricity OA at the inner of the humerus (or the excentricity OB at the rear side). The method can not be affected by the scanning attitude, which is a faster, simpler and more accurate method.
Owner:THE FIRST AFFILIATED HOSPITAL OF THIRD MILITARY MEDICAL UNIVERSITY OF PLA
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