ProDisc-L total disc replacement: a comparison of 1-level versus 2-level arthroplasty patients with a minimum 2-year follow-up.

Study Design: This is a retrospective analysis of data that was collected prospectively from 2 concurrent FDA IDE lumbar arthroplasty clinical trials performed at a single center.

Objective: To determine if there is a clinical difference between the 1-level ProDisc patients versus the 2-level ProDisc patients at a minimum of 2 years of follow-up.

Summary Of Background Data: Marnay's work with ProDisc I prompted the U.

Bilateral knee and bilateral elbow osteochondritis dissecans.

A 12 1/2-year-old white girl presented with a 3-year history of bilateral knee and bilateral elbow pain. Radiographs showed osteochondritis dissecans (OCD) lesions of both patellas and bilateral intra-articular bodies within the elbows--consistent with previous OCD lesions. After unsuccessful conservative management, an arthroscopy was performed on the right knee; the lesion was removed, and a chondroplasty was performed on the patella.