CT-based radiostereometric analysis for assessing midfoot kinematics: precision compared with marker-based radiostereometry.

Background And Purpose: 3-dimensional midfoot motion is hard to evaluate in clinical practice. We present a new computed tomography (CT)-based radiostereometric analysis (CT-RSA) technique to examine in vivo midfoot kinematics during single-leg stance and compare it with marker-based radiostereometry (RSA).

Patients And Methods: 8 patients were examined with bilateral non- and full-weight-bearing CT images of the midfoot.

Does temporary bridge plate fixation preserve joint motion after an unstable Lisfranc injury?

Background: Recently, temporary bridge plate fixation has gained popularity in the treatment of unstable Lisfranc injuries. The technique aims to reduce the risk of posttraumatic osteoarthritis, and after plate removal, the goal is to regain joint mobility. Here we explore marker-based radiostereometric analysis (RSA) to measure motion in the 1st tarsometatarsal (TMT) joint and asses the radiological outcome in patients treated with this surgical technique.