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

Cutting guides that are manufactured using advanced imaging and modelling techniques to create instruments that align more closely with the unique anatomy of each patient. Custom guides were created based on a preoperative MRI protocol (Zimmer Patient Specific Instrumentation for NexGen® Complete Knee Solution, Zimmer Biomet, Warsaw, Indiana, United States in collaboration with Materialise NV, Leuven, Belgium) to optimize the placement of the components without the need for intramedullary alignment.

Instruments specific to the implant that are used to guide bone cutting in reference to the intramedullary canal or using an extramedullary jig.

A cemented TKA (NexGen® Complete Knee Solution, Zimmer Biomet, Warsaw, Indiana, United States) is used in all cases with a cruciate retaining (CR) or posterior stabilized (LPS) prosthesis as determined by the surgeon.