ABSTRACT

Objective:

To evaluate the effect of convex rod derotation on lumbar lordosis in Lenke type-5 AIS patients who undergone selective fusion

Methods:

Twenty-five Lenke Type-5 AIS patients, operated by selective fusion and convex rod derotation, evaluated retrospectively. Thoracolumbar/lumbar Cobb angles and lumbar lordosis angles were measured on preoperative and last follow-up standing full-length anteroposterior and lateral radiographs. Kolmogorov-Smirnov test was utilized to assess distribution of study parameters. Preoperative and postoperative results were compared with Wilcoxen Sum Rank test. p<0.05 considered as statistically significant.

Results:

There were 24 female and 1 male patients. Mean age was 16 years, mean follow-up was 40 months. Preoperative and last follow-up thoracolumbar/lumbar Cobb angle was 40° and 9.72°, respectively. Mean preoperative lumbar lordosis was 52.66° and last follow-up was 50.29°. Thoracolumbar/lumbar Cobb angle difference was statistically significant, however, lumbar lordosis change was not.

Conclusion:

Convex rod derotation is an effective correction maneuver on lumbar lordosis in Lenke Type-5 AIS patients who undergone selective posterior surgery.