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Objective:
This study was conducted to collate and compare a 1 year post-surgical radiographic outcome of posterior spinalinstrumentation and correction in the coronal plane with the use of pedicle screws against hybrid fixation in patients with adolescent idiopathic scoliosis.
Methods:
Cross-sectional study involving 34 patients who underwent scoliosis correction. The variables were measured pre-operatively, immediately post surgery and in two 6 monthly OPD follow-ups. Data analysis of data was conducted in SPSS version 20.
Results:
Average major curve was corrected from 58.0 ± 13.0° pre-op to 16.0 ± 9.0° using pedicle screws fixation and increased to 18.4 ± 8.6° at first year follow-up and using hybrid construct, thenormal major curve was corrected from 62.0 ± 13.0° pre-op to 18.0 ± 8.0° and increased to 22 ± 9°. By 1 year of follow-up, differences were apparent between the two groups considering the curvature in the coronal plane.
Conclusion:
Cobbs angles between pre-operative and post operative correction and 1-year radiographic follow-up evaluation was better in the instrumentation fixation using pedicle screws compared to hybrid instrumentation. Using pedicle screws there was a correction loss of 12.5% as compared to the 16.6% using hybrid fixation Pedicle screw instrumentation. Pedicle screw fixation also has the advantage of allowing three dimensional correction of deformity.
Mustufa Pervez, Imtiaz A. Hashmi, Sohail Rafi, Idrees Shah, Aqeel A. Memon. (2017) Loss Of Correction By Segmental Pedicle Screws Compared To Hybrid Fixation In Adolescent Idiopathic Scoliosis, The Pakistan Journal of Medicine and Dentistry, Volume-6, Issue-4.
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