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Sagittal slope angle of lateral atlantoaxial articulation is associated with the severity of basilar invagination with atlantoaxial dislocation and predicts reduction degree after surgery.

Authors :
Sheng XQ
Peng ZH
Ding C
Wang BY
Hong Y
Chen PF
Meng Y
Liu H
Source :
BMC musculoskeletal disorders [BMC Musculoskelet Disord] 2024 Jul 24; Vol. 25 (1), pp. 577. Date of Electronic Publication: 2024 Jul 24.
Publication Year :
2024

Abstract

Objective: To investigate (1) lateral atlantoaxial articulation (LAA) morphology in patients with basilar invagination (BI) with atlantoaxial dislocation (AAD) and healthy individuals and its relationship with the severity of dislocation and (2) the effect of the LAA morphology on reduction degree (RD) after surgery.<br />Methods: In this retrospective propensity score matching case-control study, imaging and baseline data of 62 patients with BI and AAD from 2011 to 2022 were collected. Six hundred thirteen  participants without occipitocervical junctional deformity served as controls. Logistic regression and receiver operating characteristic (ROC) curve were used for analysis.<br />Results: The age, BMI and sex did not differ significantly between the two groups after propensity score matching. Sagittal slope angle (SSA) and coronal slope angle (CSA) was lower and greater, respectively, in the patient group than in the control group. A negative SSA value usually indicates anteverted LAA. Regression analysis revealed a significant negative correlation between SSA and severity of dislocation. However, no relationship was found between CSA and the severity of dislocation. The multivariate logistic regression analysis revealed that minimum-SSA emerged as an independent predictor of satisfactory reduction (RD ≥ 90%). The ROC curve demonstrated an area under the curve of 0.844, with a cut-off value set at -40.2.<br />Conclusion: SSA in patients group was significantly smaller and more asymmetric than that in the control group. Dislocation severity was related to SSA but not to CSA. Minimum-SSA can be used as a predictor of horizontal RD after surgery.<br /> (© 2024. The Author(s).)

Details

Language :
English
ISSN :
1471-2474
Volume :
25
Issue :
1
Database :
MEDLINE
Journal :
BMC musculoskeletal disorders
Publication Type :
Academic Journal
Accession number :
39049000
Full Text :
https://doi.org/10.1186/s12891-024-07696-4