Original Article
Outcome of traditional growing rods for correction of apical vertebra rotation in early-onset scoliosis
Sun Xu, Xu Liang, Chen Zhonghui, Chen Xi, Du Changzhi, Li Song, Liu Zhen, Qian Bangping, Wang Bin, Zhu Zezhang, Qiu Yong
Published 2018-03-01
Cite as Chin J Surg, 2018, 56(3): 206-211. DOI: 10.3760/cma.j.issn.0529-5815.2018.03.008
Abstract
ObjectiveTo evaluate the correction result of traditional dual growing rods on apical vertebral rotation.
MethodsThis study recruited 19 early-onset scoliosis patients (6 boys and 13 girls) who had received traditional dual growing rods treatment at Department of Spine Surgery, Nanjing Drum Tower Hospital from January 2009 to July 2015. The age at initial surgery was (5.7±1.7)years(range, 3 to 9 years). Measurements of primary curve magnitude, height of T1-S1, apical vertebral translation(AVR), apical vertebral body-rib ratio, apical vertebral rotation, thoracic rotation and rib hump were compared between pre-operatively, post-operatively, and at latest follow-up, through a paired-t test. Pearson correlation test was used for correlation analysis between parameters.
ResultsAll patients had a follow-up of (49.5±12.8)months(range, 24 to 71 months). A total of 111 operative procedures were performed, among which there were 92 lengthening procedures, averagely 4.8 lengthening procedures per patient. The average interval for each lengthening procedure was 10 months. The Cobb angle of primary curve was notably decreased from (66.5±13.2)° to (35.2±10.9)°(t=24.013, P<0.01), and no significant correction loss was found at the latest follow-up ((36.7±10.7)°)(t=-1.324, P=0.202). In addition, significant correction of AVR, thoracic rotation, apical vertebral translation, apical vertebra body-rib ratio, and rib hump were noted after initial surgery. Whereas, these parameters significant increased during follow-up(all P <0.05) except for thoracic rotation. Pearson correlation analysis showed that the increase of AVR during follow-up significantly correlated with change of apical vertebra translation, apical vertebral body-rib ratio, and rib hump( r=0.652, 0.814, 0.695; all P<0.05).
ConclusionsSignificant correction of AVR can be achieved after initial surgery in early-onset scoliosis patients treated with traditional dual growing rods. However, such a technique can hardly prevent the deterioration of AVR during follow-up.
Key words:
Scoliosis; Orthopedic procedures; Growing rods; Apical vertebral rotation
Contributor Information
Sun Xu
Department of Spine Surgery, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
Xu Liang
Chen Zhonghui
Chen Xi
Du Changzhi
Li Song
Liu Zhen
Qian Bangping
Wang Bin
Zhu Zezhang
Qiu Yong
