Adjacent Level Degeneration: Bryan Total Disc Arthroplasty Versus Anterior Cervical Discectomy and Fusion.

Study Design: Prospective randomized, 2-center, clinical trial.

Objective: To prospectively compare adjacent level degeneration between the Bryan Cervical Disc Prosthesis and anterior cervical discectomy and fusion (ACDF), and assess the reliability of our measurements utilizing a method not previously described.

Summary Of Background Data: ACDF is a reliable and proven procedure for the treatment of radiculopathy and/or myelopathy.

The Use of Tomosynthesis in the Global Study of Knee Subchondral Insufficiency Fractures.

Rationale And Objectives: Subchondral insufficiency fractures (SIF), previously termed spontaneous osteonecrosis of the knee, are marked by a sudden onset of severe pain. Other than the size of the lesion, prediction for progression to joint replacement is difficult. The objective was to determine if quantitative analysis of bone texture using digital tomosynthesis imaging would be useful in predicting more rapid progression to joint replacement.