Robotic Assisted Surgery In Total Knee Replacement

Inclusion Criteria: * Listed for elective primary TKR for end stage osteoarthritis * Suitable candidate for a cruciate retaining TKR (Triathlon prosthesis) * Male or Female, aged 18 years or above (18-80 at the time of listing for surgery). * Able to understand and provide written consent. Exclusion Criteria: * Varus deformity of \> 20 degrees observed by consultant on examination * Patient is unable to comply with the study protocol (incl. refusal for CT scan) * Female participant who is pregnant, lactating or planning pregnancy during the course of the study. * Requires patella resurfacing * Inability to understand the patient information for the study, provide written informed consent or answer study questionnaires for cognitive or language reasons * Any other significant disease or disorder which, in the opinion of the Investigator, may either put the participants at risk because of participation in the study, or may influence the result of the study, or the participant's ability to participate in the study.