Does the Use of Patient Specific Instrumentation Improve Outcomes in Knee Arthroplasty Surgery for Osteoarthritis When Compared to Standard Posterior Referenced Instrumentation?

Exclusion Criteria

• •Cortisone treatment during the last 6 months before operation
• •Neurological diseases with symptoms, stroke with sequel
• •Endocrine diseases with symptoms
• •OA secondary to trauma, infection, inflammatory disease or congenital and acquired deformities
• •BMI \>=35
• •OA of the hip with symptoms
• •Ongoing infection
• •Any metal within 150 mm from the joint line on the side to become operated
• •Unable or unwilling to participate in the follow-up.