20240050234. UNICOMPARTMENTAL TIBIAL COMPONENTS simplified abstract (ZIMMER GMBH)

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UNICOMPARTMENTAL TIBIAL COMPONENTS

Organization Name

ZIMMER GMBH

Inventor(s)

John O'connor of Oxford (GB)

Christopher Dodd of Oxford (GB)

David Wycliffe Murray of Birmingham (GB)

UNICOMPARTMENTAL TIBIAL COMPONENTS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240050234 titled 'UNICOMPARTMENTAL TIBIAL COMPONENTS

Simplified Explanation

The abstract describes a patent application for a unicompartmental tibial component, which is a medical device used in knee replacement surgeries. The component consists of a plate with a bearing surface and an opposing surface that is secured to the patient's tibia. The plate has an anterior end, outer side, posterior end, and inner side, with a width defined between the outer and inner sides. The plate also has a longitudinal anteroposterior axis that extends between the anterior and posterior ends.

The component includes two elongate pegs protruding from the opposing surface in the anterior portion. These pegs are parallel to each other and angled with respect to the longitudinal anteroposterior axis. They protrude posteriorly and distally from the plate. The anterior portion of the plate covers 60% or less of the longitudinal axis length, while the posterior portion covers the remaining 40% or more. The posterior portion of the opposing surface is free from pegs or other fixation devices.

The component is designed for cementless fixation using an interference fit. The abstract also mentions a method of installation and a tool suitable for use in the installation.

  • The patent describes a unicompartmental tibial component for knee replacement surgeries.
  • The component includes a plate with a bearing surface and an opposing surface that is secured to the patient's tibia.
  • The plate has an anterior end, outer side, posterior end, and inner side, with a defined width.
  • Two elongate pegs protrude from the opposing surface in the anterior portion.
  • The pegs are parallel to each other and angled with respect to the longitudinal axis.
  • The anterior portion of the plate covers 60% or less of the longitudinal axis length, while the posterior portion covers the remaining 40% or more.
  • The posterior portion of the opposing surface is free from pegs or other fixation devices.
  • The component is designed for cementless fixation using an interference fit.
  • The patent also describes a method of installation and a suitable tool for installation.

Potential applications of this technology:

  • Knee replacement surgeries, specifically for patients requiring unicompartmental tibial components.
  • Orthopedic surgeries where a cementless fixation method is preferred.

Problems solved by this technology:

  • Provides a unicompartmental tibial component for knee replacement surgeries, allowing for targeted treatment of specific compartments of the knee.
  • Offers a cementless fixation option, which may have advantages over cemented fixation methods.

Benefits of this technology:

  • Improved stability and functionality of the knee joint after surgery.
  • Potentially reduced risk of complications associated with cemented fixation.
  • Customizable to fit the patient's specific anatomy and needs.


Original Abstract Submitted

unicompartmental tibial components are described herein. a first unicompartmental component () comprises a plate () having a bearing surface () and an opposing surface () that is configured to be secured to a proximal end of a patient's tibia, wherein the plate further comprises an anterior end (), an outer side (), a posterior end () and an inner side (), wherein a mediolateral width w of the plate is defined between the outer and inner sides, and a longitudinal anteroposterior axis () extends between the anterior and posterior ends approximately one third of the width of the plate (i.e. w) from the lateral side, and defines a longitudinal axis length l of the plate. a first elongate peg () protrudes from the opposing surface in the anterior portion, the first elongate peg defining a first peg axis (). a second elongate peg () protrudes from the opposing surface in the anterior portion, the second elongate peg defining a second peg axis (). 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.

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