This prospective cohort study was conducted with the aim of comparing relevant clinical outcomes which included intra (surgical time and blood loss), post-operative outcomes (range of motion, function, complications and revisions) and return to activity between imageless and image-based surgical system in medial unicondylar knee arthroplasty

this prospective cohort study was conducted between 1st June 2015 and 1st July 2018 at Bhumibol Adulyadej Hospital, Bangkok, Thailand. A total of 33 medial compartment OA knee patients were randomly allocated to MAKO or NAVIO robotic assisted UKA. The outcomes assessed were intra-operative outcomes (operative time, blood loss) and postoperative outcomes (function, complications and revision) at 1 year after surgery.

Inclusion Criteria:

• patients were those deemed suitable for unicondylar knee arthroplasty surgery
• patients who could give informed consent
• patients who willing to attend the prescribed follow-up.

Exclusion Criteria:

• Patients who have medial osteoarthritis knee with following condition:

  1. Ligament insufficiency (anterior cruciate ligament rupture, collateral ligament insufficiency).
  2. Inflammatory arthritis
  3. A deformity requiring augmentation
  4. Neurological movement disorders
  5. pathology of the feet, ankles, hips, or opposite knee causing significant pain or gait alterations

• Patients who ultimately required a total knee arthroplasty (valgus greater than 14 degree, multiple compartment osteoarthritis were contraindications to unicondylar knee arthroplasty.