David G. Lewallen, M.D.

Closed for Enrollment

• A Matched Case Controlled Study of the Biomechanics of Dislocating Hips and Asymptomatic Non-dislocating Hips Rochester, Minn.

  The primary objective of this study is to determine whether the functional cup orientation for dislocating hips differs from the functional cup orientation for asymptomatic non-dislocating hips.

• Analysis of Synovial Fluid for Metal Ions Rochester, Minn.

  This research study is being done to find out if there is any correlation between metal ion levels (cobalt and chromium) in the fluid around your hip, and those that are found in your blood. One factor that may cause failure of a total hip arthroplasty is an elevated level of these ions around the hip.