Orthopedic spacer

摘要

A temporary knee replacement assembly and kit includes a tibial plate that attaches to the tibia, a tibial rod that extends through the plate into the medullary cavity and abuts the plate. A femoral plate attaches to the femur, and a femoral rod extends through the second plate into the femur medullary cavity and abuts the plate. A locking spacer connects the two rods. The spacer may be length adjustable or may be provided in multiple sizes for length selection. One or both of the rods may include a bone cement/antibiotic coating to provide antibiotic treatment to the tissue. The kit may include multiple tibial and femoral rods, multiple tibial and femoral plates, and multiple locking spacers, to accommodate different applications.

主权项

1. A temporary knee replacement comprising:
a tibial plate having an aperture therethrough; a tibial rod having an elongate portion configured to be inserted into a tibia medullary cavity, an intermediate post portion, and an end portion defining a first channel, wherein the elongate portion is configured to extend through the tibial plate aperture such that the end portion abuts the tibial plate; a femoral plate having an aperture therethrough; a femoral rod having an elongate portion configured to be inserted into a femur medullary cavity, an intermediate post portion, and an end portion defining a second channel, wherein the elongate portion is configured to extend through the femoral plate aperture such that the end portion abuts the femoral plate; a locking spacer comprising (i) a first slide portion that is shaped to slidably engage the first channel such that the first slide portion is restrained from moving within the first channel except along the first channel, (ii) a second slide portion that is shaped to slidably engage the second channel such that the second slide portion is restrained from moving within the second channel except along the second channel, and (iii) an attachment plate portion; and a first fastener configured to fix the position of the first slide portion in the first channel and a second fastener configured to fix the position of the second slide portion in the second channel, wherein the first fastener comprises a threaded fastener that extends through an aperture in the attachment plate portion and threadably engages a threaded aperture in the end portion of the tibial rod.