摘要:
A design method for designing a guide tool including a guide channel for use during cartilage repair in a joint is disclosed. The design method includes: selecting a direction along a joint axis indicating placement of the guide tool in the joint; and placing a positioning mark on the guide tool. The positioning mark is designed to be aligned with the center of said guide channel on a determined joint axis direction and thereby indicating a placement direction of the guide tool in relation to the selected joint axis during use of the guide tool. A design method of insert tools and/or an implant comprising positioning marks and also the guide tool, implant and insert tools designed using this method are also disclosed.
摘要:
A design method for design of a rig is presented. The rig comprises a hollow tubular shell, and the interior of said shell defines at least first and second intersecting cylinders, and a movable wall insert, configured to fit inside the hollow tubular shell so that a bore in the insert defines an active guide channel in the form of a first cylinder, wherein another active guide channel in the form of a second cylinder may be formed by moving the movable wall insert to another position inside the hollow tubular shell. The design method comprises identifying a damage area, presenting a 3D view of identified damage area and generating a 3D model of a virtual rig. The generating comprises virtually placing in 3D view a shape covering or partly covering damage area, and creating, based on the position of the virtually placed shape, a position of hollow tubular rig shell of the virtual rig. The method further comprises selecting the at least first and second intersecting cylinders of the virtual rig, based on the size and form of the virtually placed shape, designing the movable wall insert to mimick parts of the pattern of the guide channel inside area of the rig, and creating a positioning surface of the virtual rig which is a bone and/or cartilage-engaging end of hollow tubular shell. The positioning surface is adapted to follow the surface surrounding the virtually placed shape when the virtual rig is placed in a virtual model of the joint. The method comprises producing a rig according to the virtually created rig.
摘要:
A surgical joint implant has a cap in the form of at least two intersecting circles of the same diameter having an articular outer surface and an inner surface for bone adhesion. At the center of each circle a peg, for bone insertion into a hole of a nominal diameter, extends. One peg is slightly larger than said nominal diameter, to achieve an interference fit and the other peg is slightly thinner, to achieve a slide fit. A tubular drill rig open at both ends and having an interior circumference corresponding to the outer shape of the implant, can be mounted over the bone surface to be repaired. It accommodates a double drill for drilling, at the same time, a shallow hole of the diameter of the intersecting circle and a deeper narrow hole at the center of the circle of said nominal diameter.
摘要:
A design method for designing a guide tool including a guide channel for use during cartilage repair in a joint is disclosed. The design method includes: selecting a direction along a joint axis indicating placement of the guide tool in the joint; and placing a positioning mark on the guide tool. The positioning mark is designed to be aligned with the center of said guide channel on a determined joint axis direction and thereby indicating a placement direction of the guide tool in relation to the selected joint axis during use of the guide tool. A design method of insert tools and/or an implant comprising positioning marks and also the guide tool, implant and insert tools designed using this method are also disclosed.
摘要:
This invention relates a modular surgical kit for repair of diseased cartilage at an articulating surface of a joint. This invention also includes a designmethod for a modular surgical kit. The modular surgical kit is adapted for removal of damage cartilage and bone and also adapted for insertion of a medical implant a grafted plug or an artificial plug having an implant body with a predetermined cross-sectional profile and adapted for guiding insert tools during repair of diseased cartilage at an articulating surface of a joint, wherein the modular surgical kit comprising; an implant, and a medical implant a grafted plug or an artificial plug having an implant body with a predetermined cross-sectional profile a guide base having a positioning body with a guide hole through said positioning body and wherein: the modular surgical kit comprises a drill adjustment device being arranged to enable adjustment of the drill depth e.g. in certain length intervals the positioning body has a cartilage contact surface that is designed to fit the contour of cartilage or subchondral bone in the joint in a predetermined area surrounding the site of diseased cartilage the guide hole has a muzzle on the cartilage contact surface at a position corresponding to the site of the diseased cartilage; and a guide body with a guide channel, the guide channel having a cross- sectional profile that is designed to correspond to the cross-sectional profile of the implant body and having a muzzle; wherein the positioning body comprises means for releasably connecting to the guide body such that, when connected, the guide channel is positioned in relation to the positioning body such that its muzzle emanates at a site corresponding to the site of implantation into the bone.
摘要:
This invention relates to a surgical instrument, a guide tool for cartilage repair at an articulating surface of a joint, and also to the design method of the guide tool. More specifically the invention concerns a method of designing a guide tool for cartilage repair in an articulating surface of a joint, comprising the steps of: VI. determining physical parameters for cartilage damage in a joint and generating design parameters for cartilage repair objects and their relative placement in a predetermined pattern, comprising: VII. selecting repair objects to fit the individual cartilage damage site wherein the repair objects have; - surfaces intended to align with the articular cartilage surface in the joint, based on the healthy surface contour curvature VIII. determining, based on obtained image data, positions and angles of the selected cartilage repair objects, wherein the positions and angles are adapted so that the selected repair objects fit the individual cartilage damage site IX. generating design parameters of the guide tool, for placement of the cartilage repair objects comprising the following steps; generating the design for an upper part and a lower part of a guide channel in a guide body extending from the positioning body, said guide channel passing through said positioning body and said guide body wherein the angles and positions are generated dependent on and substantially corresponding to the determined angles and positions of the selected cartilage repair objects, and wherein; the design for the lower part of all the guide channel is generated dependent on and substantially corresponding to the determined cross sectional areas, of the selected cartilage repair objects.