Baerums Verk

Researchers are investigating a new method to improve ligament balancing of the medial collateral ligament (MCL) during total knee arthroplasty (TKA) for patients with knee osteoarthritis or ligament laxity. This study aims to assess whether a novel instrument can provide a more systematic, objective, and repeatable approach to MCL lengthening compared to traditional methods that depend heavily on the surgeon's experience. The focus is on varus knee deformities, where the MCL often requires lengthening to balance the joint and ensure proper alignment and function after surgery. The study involves using a new device designed to guide puncturing of the MCL in a controlled, grid-like pattern during surgery. When ligament balancing is needed, this instrument will be used to perform stepwise puncturing while monitoring ligament balance with computer navigation, ligament tensors, and conventional spatulas. The procedure aims to achieve consistent ligament lengthening without increasing injury risk. The intervention is performed perioperatively at Bærum Hospital, following a standard total knee arthroplasty protocol. Participants will be followed according to standard care for TKA patients, with assessments of ligament lengthening and feasibility of the new method over a one-year period. The primary outcomes measured include whether systematic ligament balancing is achievable using the novel instrument and the amount of MCL lengthening in millimeters. Safety and functional outcomes will be monitored through routine postoperative visits and evaluations as per usual hospital practice.