36 results about "Articular facet" patented technology

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.

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.

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.

Embodiments of devices, apparatuses, kits, and methods for repairing and/or augmenting the articular surface and/or articular rim of a joint (e.g., repairing the anterior glenoid rim after an anterior shoulder dislocation).

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.

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.

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.

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.

The invention relates to medical compositions, a medical hydrogel, a medical kit and a multichamber discharge device for use in the prevention and/or treatment of a disease of the facet joints and/or in the replacement and/or regeneration of articular facets.

A partial endoprosthesis device preserves the motion of a vertebral joint for implant into a spinal segment and includes an articular portion having a thickness that increases in the direction of introduction between the articular facets. The articular portion is elongated along a longitudinal axis with a opposite first and second faces. The first face has a central protrusion that is configured so that, by implanting the device with the articular portion inserted between an upper articular facet of a lower vertebra and a corresponding lower articular facet of upper vertebra adjacent to the lower vertebra, and with the first face in contact with either the upper or lower articular facet, and with the second face in contact with the other articular facet, the articular portion, with the first face, pushes against the first articular facet and finally becomes integral by osteointegration with the lower articular facet.