Changes in Global Sagittal Alignment after Posterior Instrumentation of Right Thoracic Curve in Adolescent Idiopathic Scoliosis with and without Thoracic Hypokyphosis
Refereed conference paper presented and published in conference proceedings


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摘要Introduction: Patients with adolescent idiopathic scoliosis (AIS) with thoracic curve often present with rotatory deformity and diminution of thoracic kyphosis. However, the change of global sagittal alignment (GSA) during thoracic kyphosis restoration remains uncertain. The aims of this study were to evaluate these changes in AIS with and without thoracic hypokyphosis during surgical correction, in comparison with healthy controls.
Methods: The patients with AIS were subdivided into thoracic hypokyphosis (THK) and normal thoracic kyphosis (NTK). Early-onset scoliosis radiographies were acquired at baseline, immediately after surgery, and at 1-year and 2-year followup examination. Multiple GSA parameters and head positions were measured, including ratio of sagittal vertical axis to sacrofemoral distance (SVA/SFD), and angle of odontoid–hip axis (OD-HA) line.
Results: Twenty-four operative AIS girls with right thoracic curvature and 36 female asymptomatic controls (NC) were recruited. There were significant differences on multiple GSA parameters between patients with AIS, with and without THK, and NC. Compared with NC, patients with AIS with THK at baseline had higher SVA/SFD (p<0.05) and OD-HA (p<0.05), indicating that THK had compensated balance with unusual forward leaning posture. Immediately after surgery, SVA/SFD still remained high while OD-HA reversed, suggesting balance remained partially compensated. Both parameters were normalised after 2 years, indicating sagittal balance finally achieved. In contrast, no significant difference was found between NTK and NC. Changes in GSA and mechanism of balance are different in patients with AIS with or without THK.
Conclusion: As the head plays a critical role on balance during immediate and delayed after surgery, OD-HA can be complementary parameter for assessing global balance during follow-up of patients with AIS with THK.
出版社接受日期02.10.2019
著者KH Yeung, GCW Man, C Vergari, W Skalli, JCY Cheng, WCW Chu
會議名稱Hong Kong Orthopaedic Association 39th Annual Congress 2019 (HKOA 2019)
會議開始日02.11.2019
會議完結日03.11.2019
會議地點Hong Kong
會議國家/地區香港
出版年份2019
月份11
日期2
出版地Hong Kong
語言英式英語

上次更新時間 2020-29-05 於 11:44