Personalised Against Standard High Tibial Osteotomy

Inclusion Criteria: * Patients undergoing High Tibial Osteotomy * Male or Female, aged 18 to 65 years * Primary diagnosis of Non-Inflammatory Degenerative Joint Disease (NIDJD) * Predominately diagnosed with unicompartmental medial osteoarthritis of the knee with the normal clinically acceptable level of other compartmental involvement * Varus deformity \<20 ° * BMI ≤ 35. An exemption to this may be made if the participant (in the investigators opinion) is suitable for surgery. * Participant is willing and able to give informed consent for participation in the study. * Able (in the Investigators opinion) and willing to comply with all study requirements. * Willing to allow his or her General Practitioner and consultant, if appropriate, to be notified of participation in the study. Exclusion Criteria: * Female participants who are pregnant, lactating or planning pregnancy during the course of the study. * Prisoners * Participants with a known deep tissue sensitivity to device materials * Participants with an active or suspected latent infection in or about the affected knee joint * Participants who have received any orthopaedic surgical intervention to the lower extremities (excluding investigative surgery) within the past 12 months, or is expected to require any orthopaedic surgical intervention to the lower extremities, other than the HTO to be enrolled in this study, within the next 12 months (including intra-articular procedures). * Participants who require bilateral HT…