# A Novel Technique for Restricted Kinematic Alignment Total Knee Arthroplasty Without Computer-Assisted Devices

## TL;DR

This paper introduces a new device and technique for performing knee replacement surgery without the need for expensive computer-assisted tools.

## Contribution

A novel device and technique for restricted kinematic alignment total knee arthroplasty without computer-assisted devices.

## Key findings

- The new device enables precise cartilage thickness measurement and osteotomy angle adjustment.
- The heel-lift technique provides a reproducible method for tibial osteotomy volume and angle determination.
- The innovations make KA and rKA-TKA feasible in any surgical setting without CAS.

## Abstract

Kinematic-alignment total knee arthroplasty (KA-TKA) aims to restore natural limb alignment and joint line obliquity, thereby improving patient satisfaction. Restricted KA-TKA (rKA-TKA) addresses abnormal knee anatomies and seeks to replicate natural anatomical structures within safe alignment boundaries. This study introduces a novel device and technique that enables rKA-TKA without computer-assisted surgery (CAS). The new device allows for precise cartilage thickness measurement and adjustment of osteotomy angles, facilitating accurate alignment. A heel-lift technique for tibial osteotomy is presented, offering a reproducible method for determining the osteotomy volume and angle. These innovations make KA and rKA-TKA feasible in any surgical setting, avoiding the high costs and limited availability associated with CAS.