Braces do not reduce loads on internal spinal fixation devices

Objective. To determine the effect of a brace or harness on loads on intern al spinal fixation devices. Design. The implant loads were measured in vivo using telemeterized interna l spinal fixators. Background. Only limited information exists regarding the load reduction du e to a brace or harness. Methods. A Boston overlap brace, a reclination brace, and a lumbotrain harn ess were examined to determine how they affect the loads on internal spinal fixation devices. The implant loads were measured using telemeterized fixa tors in six patients for several positions and activities, including sittin g, standing, walking, bending forward, and lifting an extended leg in a sup ine position. Results. None of the braces studied were able to markedly I educe the loads on the fixators. Frequently even higher fixator loads were measured when w earing a brace or harness. Conclusions. It does not seem helpful to brace patients after mono- or bise gmental stabilization of the lumbar spine.