Patent ID: 9138326
Filing Date: 2015-09-22
Classification: A61F

Abstract:
1. A joint implant comprising: a longitudinal axis; an upper implant part; a lower implant part articulated to the upper implant part to form a joint, each of the upper and lower implant parts having a joint part and an abutment part that can be abutted on and supported against respectively facing bone, the joint part and the abutment part of each respective implant part being detachably connected to each other by respective fixing devices, each abutment part having a fixing area including a seat into which the corresponding joint part is insertable in a direction parallel to the longitudinal axis from a surface facing the abutment part in a mounted state of the implant, the joint part and the abutment part of each of the upper and lower implant parts including a joint region, the two joint regions cooperating with each other directly to form an articulated connection, or with an intermediate element having opposite upper and lower sides as contact surfaces, thus forming two sub-joints; and a connecting device interconnecting the upper and lower implant parts to form a coherent assembly, wherein the connecting device can change position relative to one or both of the joint parts of the upper and lower implant parts, and wherein each fixing device detachably connecting the abutment part and the corresponding joint part of a respective implant part comprises form-closure devices fixable to one another in a fixed position by twisting the joint part and the abutment part of the respective implant part relative to one another, and at least one of said fixing devices further includes two anti-twist safeguarding devices for securing the form-closure devices in the fixed position against untwisting in an opposite twisting direction, each of said anti-twist safeguarding devices having a recess in a radially outward surface of the joint part engaged with a protrusion radially inwardly extending from the corresponding abutment part, said engagement being disengageable in a direction perpendicular to the longitudinal axis by a tool.