Posterior Cruciate Retaining (PCR) Versus Posterior Cruciate Substituting (PCS) Total Knee Arthroplasty (TKA)

SCORPIO™ Posterior Stabilized Versus Posterior Retained Total Knee Arthroplasties: Long-term Functional and Radiographic Outcome

This randomized clinical trial (RCT) examined 10 year outcomes comparing SCORPIO™ Posterior Cruciate Substituting (PCS) versus Posterior Cruciate Retaining (PCR) Total Knee Arthroplasty (TKA) as the primary outcome.

RCT of 100 subjects undergoing primary TKA who were randomized to received either a SCORPIO™ PCS or PCR TKA.

Subjects were evaluated pre-operatively and at 2 and 10 years post-operatively using the Western Ontario (WOMAC) Osteoarthritis Index, the RAND-36 and knee range of motion (2 years only). Complication and revision rates were also evaluated.

Inclusion Criteria:

• scheduled for primary TKA
• non-inflammatory arthritis
• intact Posterior Cruciate Ligament at the time of surgery

Exclusion Criteria:

• required bone grafting of either the femur or tibia
• varus or valgus deformity of > 15 degrees
• previous high tibial osteotomy
• unable to understand or comply with the study requirements
• unable to provide signed informed consent