Open AccessFactors favoring regain of the lost vertical spinal height through posterior spinal fusion in adolescent idiopathic scoliosis
Author(s) -
Benlong Shi,
Saihu Mao,
Leilei Xu,
Xu Sun,
Zhen Liu,
Zezhang Zhu,
TP Lam,
Jack C. Y. Cheng,
Bobby Kin Wah Ng,
Yong Qiu
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep29115
Subject(s) - cobb angle , coronal plane , sagittal plane , idiopathic scoliosis , spinal deformity , scoliosis , medicine , spinal fusion , deformity , cobb , orthodontics , surgery , anatomy , biology , genetics
Height gain is a common beneficial consequence following correction surgery in adolescent idiopathic scoliosis (AIS), yet little is known concerning factors favoring regain of the lost vertical spinal height (SH) through posterior spinal fusion. A consecutive series of AIS patients from February 2013 to August 2015 were reviewed. Surgical changes in SH (ΔSH), as well as the multiple coronal and sagittal deformity parameters were measured and correlated. Factors associated with ΔSH were identified through Pearson correlation analysis and multivariate regression analysis. A total of 172 single curve and 104 double curve patients were reviewed. The ΔSH averaged 2.5 ± 0.9 cm in single curve group and 2.9 ± 1.0 cm in double curve group. The multivariate regression analysis revealed the following pre-operative variables contributed significantly to ΔSH: pre-op Cobb angle, pre-op TK (single curve group only), pre-op GK (double curve group only) and pre-op LL (double curve group only) ( p < 0.05). Thus change in height (in cm) = 0.044 × (pre-op Cobb angle) + 0.012 × (pre-op TK) (Single curve, adjusted R 2 = 0.549) or 0.923 + 0.021 × (pre-op Cobb angle 1 ) + 0.028 × (pre-op Cobb angle 2 ) + 0.015 × (pre-op GK)-0.012 × (pre-op LL) (Double curve, adjusted R 2 = 0.563). Severer pre-operative coronal Cobb angle and greater sagittal curves were beneficial factors favoring more contribution to the surgical lengthening effect in vertical spinal height in AIS.