公开(公告)号：US20240050234A1

公开(公告)日：2024-02-15

申请号：US18271029

申请日：2022-01-07

申请人： John O'CONNOR ,  Christopher DODD ,  David Wycliffe MURRAY ,  ZIMMER GMBH

发明人： John O'CONNOR ,  Christopher DODD ,  David Wycliffe MURRAY

IPC分类号： A61F2/38 ,  A61F2/30 ,  A61B17/17

CPC分类号： A61F2/389 ,  A61F2/30767 ,  A61B17/1764 ,  A61F2002/30004 ,  A61F2002/3895 ,  A61F2002/30327 ,  A61F2002/3093 ,  A61F2002/30892

摘要： Unicompartmental tibial components are described herein. A first unicompartmental component (10) comprises a plate (12) having a bearing surface (18) and an opposing surface (22) that is configured to be secured to a proximal end of a patient's tibia, wherein the plate further comprises an anterior end (24), an outer side (25), a posterior end (26) and an inner side (27), wherein a mediolateral width W of the plate is defined between the outer and inner sides, and a longitudinal anteroposterior axis (28) extends between the anterior and posterior ends approximately one third of the width of the plate (i.e. 1/3 W) from the lateral side, and defines a longitudinal axis length L of the plate. A first elongate peg (14) protrudes from the opposing surface in the anterior portion, the first elongate peg defining a first peg axis (32). A second elongate peg (16) protrudes from the opposing surface in the anterior portion, the second elongate peg defining a second peg axis (34). The first and second peg axes are disposed at an angle of 45-70 degrees with respect to the longitudinal anteroposterior axis and are substantially parallel to one another such that the first and second pegs protrude posteriorly as well as distally with respect to the plate. An anterior portion of the plate comprises a part of the plate defined by an anterior 60% or less of the longitudinal axis length L, whilst a posterior portion of the plate comprises a part of the plate that is defined by the remaining posterior 40% or more of the longitudinal axis length L. The posterior portion of the opposing surface is free from pegs or other fixation devices, and the first and second elongate pegs are located more than half of the mediolateral width W of the plate from an outer edge of the plate. The component is configured for cementless fixation using an interference fit. Also described is a method of installation and a tool suitable for use in installation.