Ortho Dx: How does partial and total knee replacement compare?

A 53-year-old woman presents with a several-month history of right knee pain. She underwent anterior cruciate ligament reconstruction with medial meniscectomy 15 years earlier. Conservative treatment, including nonsteroidal anti-inflammatory drugs, intra-articular steroid injections, and viscosupplement injections, over the last several months has failed to relieve the pain. Anteroposterior, lateral, and sunrise radiographs show medial compartment arthritis ...