Articles Vol. 65 No. CĐ11- HN Chấn thương Chỉnh hình-TPHCM 02/12/2024

9. THE ROLE OF EOS IMAGING SYSTEM TO EVALUATE MAXIMAL AXIAL VERTEBRA ROTATION IN ADOLESCENT IDIOPATHIC SCOLIOSIS

Vo Quang Dinh Nam1,2, Pham Binh Nguyen1,2, Vo Van Khoa3,4, Pham Thi Cam Van5,6
1 Hospital for Traumatology and Orthopaedics
2 Bệnh viện Chấn thương Chỉnh hình Thành phố Hồ Chí Minh
3 University of Medicine and Pharmacy at Ho Chi Minh City
4 Trường Đại học Y Dược Thành phố Hồ Chí Minh
5 MEDIC Medical Center
6 Trung tâm Y khoa MEDIC, Thành phố Hồ Chí Minh
Corresponding author: namvqd@gmail.com
DOI: 10.52163/yhc.v65iCD11.1741
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Keywords
Trunk rotational angle Apical vertebral rotation Maximal axial vertebral rotation Coronal deformity angular ratio
Abstract

Background: Neglecting or misunderstanding the assessment of vertebral rotation can lead to inaccuracies during surgery. However, no assessment of vertebral rotation is totally reliable.

Purposes: This study evaluated the relationship between maximal axial vertebra rotation (maxAVR) and other clinical and radiological indexes, compared to apical vertebra rotation (AVR) in idiopathic adolescent scoliosis (AIS).

Methods: Forty consecutive patients of AIS with Cobb angle of major curve > 40° were included. They were scanned by an EOS imaging system and had trunk rotational angle (TRA) measured by scoliometer. The correlation between variables was assessed using Pearson’s correlation coefficient and loaded onto a meta-analysis model.

Results: There were (34 girls and 6 boys) with an average age of 13.8±1.6 years. AVR was maxAVR in only 47.5% (19/40) cases of the major curves and 42.3% (11/26) cases of the minor curves. The correlation between maxAVR and TRA was significantly higher than the correlation between AVR and TRA for the MT curves (p=0.0001) and TL/L curves (p=0.0001). On multivariate regression analysis, the magnitude of maxAVR showed a significant correlation with TRA (p=0.0002), Cobb angle (p=0.001), and coronal deformity angular ratio (C-DAR) (p=0.027).

Conclusions: The apical vertebra was not the most rotated in most cases. The correlation between maxAVR and TRA was significantly higher than the correlation between AVR and TRA. Moreover, the maxAVR was multivariately related to TRA, Cobb angle, and C-DAR.

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