Sagittal balance evaluation of spinal deformities using curve harmony angles
10.3760/cma.j.issn.0253-2352.2014.08.006
- VernacularTitle:脊柱-骨盆曲线和谐角在脊柱畸形矢状面评价中的应用
- Author:
Hui LIU
;
Zhaomin ZHENG
;
Sibei LI
;
Kuibo ZHANG
;
Jianru WANG
;
Huafeng WANG
;
Hua WANG
;
Zemin LI
;
Hao YANG
- Publication Type:Journal Article
- Keywords:
Spinal Curvatures;
Postural balance;
Radiography
- From:
Chinese Journal of Orthopaedics
2014;(8):831-838
- CountryChina
- Language:Chinese
-
Abstract:
Objective To introduce Curve Harmony Angle (CHA)to quantify the relationship between adjacent curves of the spine and pelvis and evaluate sagittal balance in spinal deformities. Methods Radiographic analysis of 93 asymptomatic vol-unteers and 95 patients including Degenerative Scoliosis(DS), Adolescent Idiopathic Scoliosis(AIS)and Ankylosing Spondylitis (AS)was performed by measuring sagittal parameters. Correlation study among parameters was further conducted. Curve Harmony Angles(CHAs)including the following three parameters were measured. Cervical-Thoracic Angle (CTA), Thoracic-Lumbar Angle (TLA) and Lumbar-Sacral Angle (LSA). Comparative study between normal population and different spinal disorders were per-formed in order to describe the characteristic changes of CHAs. Besides, according to Schwab SRS adult deformity classification, comparative study of CHAs in different balance status was performed to test the reliability of CHA on sagittal balance evaluation. Results All subjects showed typical changes of sagittal parameters. Different spinal disorders showed characteristic patterns of CHAs. In Schwab-SRS Adult Deformity Classification, Compensatory Balance group showed smaller LSA compared to Balance group;Imbalance group showed significantly smaller CTA, LSA and significantly greater TLA. Conclusion CHAs are parame-ters used to quantify the relationship between adjacent curves. Comparative study of CHA between normal population and different spinal disorder or among different balance status showed specific characters respectively. It is feasible to use CHA to evaluate the clinical sagittal balance and the results of deformity correction.
