Rod System Allows Controlled Movement of Adjacent Vertebrae

A novel vertebral fusion system improves and expands the surgeon's treatment options and improves patient outcomes by reducing adjacent-level disease caused by traditional fusion surgery.

The Dynamo Rod System contains a flexible rod that allows for 0.75 mm of compression, +/-1.75 degrees of angulation, and features a 5.5-mm diameter rod that is pre-contoured for lordosis in lengths ranging from 65 to 400 mm, which allows for controlled compression, distraction, flexion, and extension. The rod system is designed to promote load sharing between the vertebral body replacement device and the endplates, while reducing stress on the screw to bone interfaces. The Dynamo rod system is manufactured by Alphatec Holdings (Carlsbad, CA, USA), and has been approved by the U.S. Food and Drug Administration (FDA).

"Unlike a traditional rigid fusion procedure, Dynamo is designed to allow for controlled compression, distraction, flexion, and extension of vertebrae adjacent to a fusion location, which should enable the patient to have an additional range of motion during the initial healing phase following fusion surgery,” said Dirk Kuyper, president
and CEO of Alphatec.

Advances in spine surgery technology, including a greater focus on the principles of spinal load sharing, has led to a shift toward reconstructing the spine in a way that reproduces normal spinal mechanics--a process called dynamic stabilization--with instrumentation that is rigid enough to provide sufficient immobilization while fusion takes place, but not so stiff that it places excessive pressure on the adjacent facets and discs.


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