# Introducing the Universal Periprosthetic Femur Fracture (UPFF) Classification: All Fractures Femur

## TL;DR

This paper introduces a new classification system for periprosthetic femur fractures that covers the entire femur, addressing the limitations of previous systems.

## Contribution

The paper presents a novel, rule-based classification system for periprosthetic femur fractures applicable across the entire femur.

## Key findings

- Previous classifications are outdated and do not account for complex fracture patterns involving revision-style implants.
- The new system aims to standardize communication and improve treatment planning and research analysis.
- Reliability and clinical validation studies are currently being conducted.

## Abstract

Peri-Prosthetic Femur Fractures (PPFFs) are occurring with increasing frequency as the incidence of hip and knee arthroplasty is rising globally. PPFFs are presenting with more complex patterns commensurate with the increasing sophistication of implant technology and surgical technique. Moreover, with patients undergoing arthroplasty procedures at a younger mean age, it is not uncommon to see both ipsilateral implants (hip and knee) being affected by the fracture. Previous classifications have separated PPFFs into the hip or knee regions, and most do not include fracture patterns about revision-style implants. Prior schemes are antiquated and are not applicable to all current fracture patterns. We present a codified anthropometric, rule-based staging system that incorporates PPFFs across the entire femur. This system is designed to standardize communication and capture variables relevant to treatment planning and future research analysis. Formal reliability and clinical validation studies are ongoing.