Changes in Trunk Range of Motion (ROM) Following Anterior or Posterior Spinal Fusion in Adolescent Idiopathic Scoliosis

·(a – Medtronic Sofamor-Danek; b – Medtronic Sofamor-Danek; c – Medtronic Sofamor-Danek)

INTRODUCTION: Little data exists regarding trunk ROM changes following scoliosis surgery.

PURPOSE: To compare changes in trunk ROM following anterior or posterior fusion with instrumentation in adolescent idiopathic scoliosis (AIS).

METHODS: 44 subjects with AIS(24 Posterior & 20 Anterior) were tested preop and at 24 months postop. A 6 camera video system recorded trunk ROM.

RESULTS: The Posterior group(11.2) had significantly more levels fused than the Anterior(6.2) and the lowest instrumented vertebra was more distal in the Posterior(L2) group. Preoperative results indicated no differences between the groups. Except for right lateral flexion in the Anterior group, there was a significant decrease in ROM for both groups. Postoperative ROM for the Posterior group was significantly less than the Anterior group for all motions.

CONCLUSION: The Posterior fusion group displayed significantly less ROM than the Anterior group in all 3 planes, postoperative.

· If noted, the author indicates something of value received. The codes are identified as: a-research or institutional support; b-miscellaneous funding; c-royalties; d-stock options.