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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Surgical treatment of neuromuscular Early Onset Scoliosis with a bilateral posterior one-way rod compared to the Spring Distraction System: study protocol for a limited-efficacy Randomized Controlled Trial (BiPOWR)

Fig. 2

One Way Self-Expanding Rod. The OWSER is a growing rod that passively lengthens one way as the spine grows. In the BiPOWR trial, the distal anchors are iliosacral screws instead of pedicle screws. Blue: The proximal fixation consists of hooks positioned in a claw configuration. Two crosslinks are added for torsional stability (green). Red: The growing domino, combined with a rod that is serrated across its distal length, allows for lengthening. The reserve length can be 50 mm or 80 mm long. Movement in the other direction is prevented by a split retaining ring system inside the domino

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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