Mako Cementless TKA vs Mako Cemented TKA

The Forgotten Joint Score [FJS]

The Forgotten Joint Score (FJS) is a patient-reported outcome measure (PROM) used to assess the degree to which patients have "forgotten" their artificial joint, particularly after joint replacement surgery, like knee replacements. The score \[100 is best\] was developed to measure the success of a joint replacement by evaluating how well a patient has adjusted to the implanted joint in their daily life. It aims to show whether the patient feels like the artificial joint is part of their body and doesn't think about it in normal activities. The FJS has a series of questions about: * Pain or discomfort in the joint * Function and mobility * The awareness of the joint during daily activities (e.g., walking, climbing stairs, or sitting) * The patient's satisfaction with the joint. A high score means the patient feels that the joint replacement is functioning well and does not interfere with their quality of life, while a lower score may indicate that the patient is not fully satisfied.

Assessement of tibial implant migration by maximum total point motion [MTPM] in millimetres using Radiostereometric analysis (RSA)

Radiostereometric analysis (RSA) is a highly precise imaging technique used in orthopedic research and clinical practice to track the movement of bones and implants within the body. It uses X-ray images taken from two different angles to create a 3D model of the bones or implants, which allows for highly accurate measurements of their position and motion over time. RSA is particularly useful for evaluating implant movement. It assesses the stability of orthopedic implants - for this outcome the tibial component of the knee prosthesis - to determine if it is moving, which could lead to failure. This study will assess continuous migration between the first and second year post-op, and second and fifth year post-op, measured by maximum total point motion \[MTPM\]: the maximum displacement observed between two objects (like a bone and an implant, or between two parts of an implant). Measurements are in millimetres \[mm\]; lower mm is better than higher mm, which could indicate loosening

Assess risk of loosening of the knee prosthesis by maximum total point motion [MTPM] in millimetres using Radiostereometric analysis [RSA]

Radiostereometric analysis \[RSA\] is a highly precise and advanced imaging technique used in orthopedic research and clinical practice to track the movement of bones and implants within the body. It uses X-ray images taken from two different angles to create a 3D model of the bones or implants, which allows for highly accurate measurements of their position and motion over time. RSA is particularly useful for evaluating implant movement. It assesses the stability of orthopedic implants - for this study the knee prosthesis - to determine if it is moving or loosening, which could lead to failure. This study will assess continuous migration between the first and second year pos-op, and second and fifth year post-op, measured by maximum total point motion \[MTPM\]: the maximum displacement observed between two objects (like a bone and an implant, or between two parts of an implant). Measurements are in millimetres \[mm\]; lower mm is better than higher mm, which could indicate loosening

Western Ontario and McMaster Universities Arthritis Index (WOMAC)

Western Ontario and McMaster Universities Arthritis Index (WOMAC) is a widely used set of questionnaires designed to assess the severity of symptoms in patients, particularly in the knee and hip joints. For this study it is the knee joint It evaluates three main areas: Pain: How much pain the person experiences in their joints. Stiffness: How stiff the person feels in their joints. Physical Function: The difficulty the person has with everyday movements and activities. The WOMAC score is typically measured using a series of questions related to each of these areas, with responses indicating the level of severity. Each section is scored on a scale, and the total score is used to assess the degree of impact of their affect joint in their everyday life. The higher score the worse, the lower score the better outcome: 0 is the best score indicating no problems with pain, stiffness or physical function

The Oxford Knee Score (OKS)

The Oxford Knee Score (OKS) is a patient completed questionnaire and assesses apatient's knee function and the severity of symptoms related to knee problems, particularly after knee surgery, such as knee replacement. The OKS consists of 12 questions related to symptoms, pain, and functional limitations. The questions focus on pain intensity, stiffness, and the ability to perform activities like walking, climbing stairs, and getting in and out of a car. Patients respond to each question on a 5-point scale, where higher scores generally indicate better knee function and less discomfort. The total score ranges from 0 to 48, with lower scores indicating more severe knee problems and higher scores indicating less pain and better function.