Influence of the T1-slope on sagittal alignment of the subaxial cervical spine after posterior atlantoaxial fusion in os odontoideum

2016 ◽  
Vol 149 ◽  
pp. 39-43 ◽  
Author(s):  
Qunfeng Guo ◽  
Yuan Deng ◽  
Jian Wang ◽  
Liang Wang ◽  
Xuhua Lu ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Sagittal Alignment ◽  
Os Odontoideum ◽  
Atlantoaxial Fusion ◽  
T1 Slope ◽  
Subaxial Cervical Spine

scholarly journals Relationship of T1 Slope with sagittal alignment parameters of the upper and subaxial cervical spine in patients with cervical lordotic and kyphotic curvature

2020 ◽  
Author(s):  
Dong Sun ◽  
Peng Liu ◽  
Zhaolin Wang ◽  
Jie Cheng ◽  
Jianhui Mou ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Sagittal Alignment ◽  
Pearson Correlation ◽  
Linear Regression Analysis ◽  
Observer Agreement ◽  
Group Differences ◽  
Cervical Lordosis ◽  
Cervical Alignment ◽  
T1 Slope ◽  
Subaxial Cervical Spine

Abstract Background: To identify the relationship between T1 slope and the sagittal alignment parameters of the upper and subaxial cervical spine in patients with cervical lordosis and kyphosis.Methods: Relevant sagittal radiographic parameters pertaining to patients with non-specific neck pain but with no associated neurogenic symptoms were retrospectively analyzed. Patients were categorized into lordotic alignment and kyphotic alignment groups based on the C2-C7 Cobb. Correlation among radiographic variables was assessed with the Pearson correlation coefficient and linear regression analysis. Between-group differences with respect to cervical alignment parameters were assessed with One-way Analysis of Variance.Results: Intra-observer and inter-observer agreement (two independent observers) was rated as excellent (kappa: 0.91 - 0.93). Inter-observer agreement for the two independent observers was rated as and substantial (kappa: 0.79 - 0.80), respectively. Significant between-group differences were observed with respect to C0-C1 angle, C1-C2 angle, C0-C2 angle, C2-C7 SVA (sagittal vertical axis) and TS-CL (T1 slope minus cervical lordosis) (P<0.01 for all), but not with respect to T1S (T1 slope) (P=0.367). In both groups, C2-C7 SVA showed a significant linear correlation with T1S (r2=0.712 vs. r2=0.467) and TS-CL (r2=0.810 vs. r2=0.248).Conclusion: This study showed that the two cervical alignment types (lordosis and kyphosis) have different angular variation in upper and subaxial cervical spine. With the increase in T1 slope, the upper cervical C0-C2 Cobb angle and the C2-7 SVA in the lordotic group were significantly higher than that of the kyphotic group. TS-CL mismatch may significantly impact lordotic cervical alignment in patients with lordosis.

scholarly journals Relationship of T1 Slope with Sagittal Alignment Parameters of the Upper and Subaxial Cervical Spine in Patients with Cervical Lordotic and Kyphotic Curvature

2020 ◽  
Author(s):  
Dong Sun ◽  
Peng Liu ◽  
Zhaolin Wang ◽  
Jie Cheng ◽  
Jianhui Mou ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Sagittal Alignment ◽  
Pearson Correlation ◽  
Linear Regression Analysis ◽  
Observer Agreement ◽  
Group Differences ◽  
Cervical Lordosis ◽  
Cervical Alignment ◽  
T1 Slope ◽  
Subaxial Cervical Spine

Abstract Background To identify the relationship between T1 slope and the sagittal alignment parameters of the upper and subaxial cervical spine in patients with cervical lordosis and kyphosis.Methods Relevant sagittal radiographic parameters pertaining to patients with non-specific neck pain but with no associated neurogenic symptoms were retrospectively analyzed. Patients were categorized into lordotic alignment and kyphotic alignment groups based on the C2-C7 Cobb. Correlation among radiographic variables was assessed with the Pearson correlation coefficient and linear regression analysis. Between-group differences with respect to cervical alignment parameters were assessed with One-way Analysis of Variance.Results Intra-observer and inter-observer agreement (two independent observers) was rated as excellent (kappa: 0.91–0.93). Inter-observer agreement for the two independent observers was rated as and substantial (kappa: 0.79–0.80), respectively. Significant between-group differences were observed with respect to C0-C1 angle, C1-C2 angle, C0-C2 angle, C2-C7 SVA (sagittal vertical axis) and TS-CL (T1 slope minus cervical lordosis) (P < 0.01 for all), but not with respect to T1S (T1 slope) (P = 0.367). In both groups, C2-C7 SVA showed a significant linear correlation with T1S (r2 = 0.712 vs. r2 = 0.467) and TS-CL (r2 = 0.810 vs. r2 = 0.248).Conclusion This study showed that the two cervical alignment types (lordosis and kyphosis) have different angular variation in upper and subaxial cervical spine. With the increase in T1 slope, the upper cervical C0-C2 Cobb angle and the C2-7 SVA in the lordotic group were significantly higher than that of the kyphotic group. TS-CL mismatch may significantly impact lordotic cervical alignment in patients with lordosis.

scholarly journals Relationship between the atlantodental interval and T1 slope after atlantoaxial fusion in patients with rheumatoid arthritis

BMC Surgery ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Byeong Jin Ha ◽  
Yu Deok Won ◽  
Je Il Ryu ◽  
Myung-Hoon Han ◽  
Jin Hwan Cheong ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Sagittal Alignment ◽  
Multivariate Logistic Regression Analysis ◽  
Atlantoaxial Instability ◽  
Atlantoaxial Fusion ◽  
T1 Slope ◽  
Significant Difference ◽  
Cervical Sagittal Alignment ◽  
Before And After ◽  
Atlantodental Interval

Abstract Background Atlantoaxial fusion has been widely used for the treatment of atlantoaxial instability (AAI). However, atlantoaxial fusion sacrifices the motion of atlantoaxial articulation, and postoperative loss of cervical lordosis and aggravation of cervical kyphosis are observed. We investigated various factors under the hypothesis that the atlantodental interval (ADI) and T1 slope may be associated with sagittal alignment after atlantoaxial fusion in patients with rheumatoid arthritis (RA). Methods We retrospectively investigated 64 patients with RA who underwent atlantoaxial fusion due to AAI. Radiological factors, including the ADI, T1 slope, Oc-C2 angle, cervical sagittal vertical axis, and C2–C7 angle, were measured before and after surgery. Results The various factors associated with atlantoaxial fusion before and after surgery were compared according to the upper and lower preoperative ADIs. There was a significant difference in the T1 slope 1 year after surgery (p = 0.044) among the patients with lower preoperative ADI values. The multivariate logistic regression analysis showed that the preoperative ADI (> 7.92 mm) defined in the receiver-operating characteristic curve analysis was an independent predictive factor for the increase in the T1 slope 1 year after atlantoaxial fusion (odds ratio, 4.59; 95% confidence interval, 1.34–15.73; p = 0.015). Conclusion We found an association between the preoperative ADI and difference in the T1 slope after atlantoaxial fusion in the patients with RA. A preoperative ADI (> 7.92 mm) was an independent predictor for the increase in the T1 slope after atlantoaxial fusion. Therefore, performing surgical treatment when the ADI is low would lead to better cervical sagittal alignment.

scholarly journals Relationship between the atlantodental interval and T1 slope after atlantoaxial fusion in patients with rheumatoid arthritis

2020 ◽  
Author(s):  
Byeong Jin Ha ◽  
Yu Deok Won ◽  
Jeil Ryu ◽  
Myung-Hoon Han ◽  
Jin Hwan Cheong ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Sagittal Alignment ◽  
Multivariate Logistic Regression Analysis ◽  
Atlantoaxial Instability ◽  
Atlantoaxial Fusion ◽  
T1 Slope ◽  
Significant Difference ◽  
Cervical Sagittal Alignment ◽  
Before And After ◽  
Atlantodental Interval

Abstract Background Atlantoaxial fusion has been widely used for the treatment of atlantoaxial instability (AAI). However, atlantoaxial fusion sacrifices the motion of atlantoaxial articulation, and postoperative loss of cervical lordosis and aggravation of cervical kyphosis are observed. We investigated various factors under the hypothesis that the atlantodental interval (ADI) and T1 slope may be associated with sagittal alignment after atlantoaxial fusion in patients with rheumatoid arthritis (RA). Methods We retrospectively investigated 64 patients with RA who underwent atlantoaxial fusion due to AAI. Radiological factors, including the ADI, T1 slope, Oc-C2 angle, cervical sagittal vertical axis, and C2-C7 angle, were measured before and after surgery. Results The various factors associated with atlantoaxial fusion before and after surgery were compared according to the upper and lower preoperative ADIs. There was a significant difference in the T1 slope 1 year after surgery (p = 0.044) among the patients with lower preoperative ADI values. The multivariate logistic regression analysis showed that the preoperative ADI (> 7.92 mm) defined in the receiver-operating characteristic curve analysis was an independent predictive factor for the increase in the T1 slope 1 year after atlantoaxial fusion (odds ratio, 4.66; 95% confidence interval, 1.37–15.84; p = 0.014). Conclusion We found an association between the preoperative ADI and difference in the T1 slope after atlantoaxial fusion in the patients with RA. A preoperative ADI (> 7.92 mm) was an independent predictor for the increase in the T1 slope after atlantoaxial fusion. Therefore, performing surgical treatment when the ADI is low would lead to better cervical sagittal alignment.

scholarly journals Relationship between the atlantodental interval and T1 slope after atlantoaxial fusion in patients with rheumatoid arthritis

2020 ◽  
Author(s):  
Byeong Jin Ha ◽  
Yu Deok Won ◽  
Jeil Ryu ◽  
Myung-Hoon Han ◽  
Jin Hwan Cheong ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Sagittal Alignment ◽  
Multivariate Logistic Regression Analysis ◽  
Atlantoaxial Instability ◽  
Atlantoaxial Fusion ◽  
T1 Slope ◽  
Significant Difference ◽  
Cervical Sagittal Alignment ◽  
Before And After ◽  
Atlantodental Interval

Abstract Background: Atlantoaxial fusion has been widely used for the treatment of atlantoaxial instability (AAI). However, atlantoaxial fusion sacrifices the motion of atlantoaxial articulation, and postoperative loss of cervical lordosis and aggravation of cervical kyphosis are observed. We investigated various factors under the hypothesis that the atlantodental interval (ADI) and T1 slope may be associated with sagittal alignment after atlantoaxial fusion in patients with rheumatoid arthritis (RA).Methods: We retrospectively investigated 64 patients with RA who underwent atlantoaxial fusion due to AAI. Radiological factors, including the ADI, T1 slope, Oc-C2 angle, cervical sagittal vertical axis, and C2-C7 angle, were measured before and after surgery.Results: The various factors associated with atlantoaxial fusion before and after surgery were compared according to the upper and lower preoperative ADIs. There was a significant difference in the T1 slope 1 year after surgery (p=0.044) among the patients with lower preoperative ADI values. The multivariate logistic regression analysis showed that the preoperative ADI (>7.92 mm) defined in the receiver-operating characteristic curve analysis was an independent predictive factor for the increase in the T1 slope 1 year after atlantoaxial fusion (odds ratio, 4.59; 95% confidence interval, 1.34-15.73; p=0.015).Conclusion: We found an association between the preoperative ADI and difference in the T1 slope after atlantoaxial fusion in the patients with RA. A preoperative ADI (>7.92 mm) was an independent predictor for the increase in the T1 slope after atlantoaxial fusion. Therefore, performing surgical treatment when the ADI is low would lead to better cervical sagittal alignment.

scholarly journals Relationship between the atlantodental interval and T1 slope after atlantoaxial fusion in patients with rheumatoid arthritis

2020 ◽  
Author(s):  
Byeong Jin Ha ◽  
Yu Deok Won ◽  
Jeil Ryu ◽  
Myung-Hoon Han ◽  
Jin Hwan Cheong ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Sagittal Alignment ◽  
Multivariate Logistic Regression Analysis ◽  
Atlantoaxial Instability ◽  
Atlantoaxial Fusion ◽  
T1 Slope ◽  
Significant Difference ◽  
Cervical Sagittal Alignment ◽  
Before And After ◽  
Atlantodental Interval

Abstract Background: Atlantoaxial fusion has been widely used for the treatment of atlantoaxial instability (AAI). However, atlantoaxial fusion sacrifices the motion of atlantoaxial articulation, and postoperative loss of cervical lordosis and aggravation of cervical kyphosis are observed. We investigated various factors under the hypothesis that the atlantodental interval (ADI) and T1 slope may be associated with sagittal alignment after atlantoaxial fusion in patients with rheumatoid arthritis (RA).Methods: We retrospectively investigated 64 patients with RA who underwent atlantoaxial fusion due to AAI. Radiological factors, including the ADI, T1 slope, Oc-C2 angle, cervical sagittal vertical axis, and C2-C7 angle, were measured before and after surgery.Results: The various factors associated with atlantoaxial fusion before and after surgery were compared according to the upper and lower preoperative ADIs. There was a significant difference in the T1 slope 1 year after surgery (p=0.044) among the patients with lower preoperative ADI values. The multivariate logistic regression analysis showed that the preoperative ADI (>7.92 mm) defined in the receiver-operating characteristic curve analysis was an independent predictive factor for the increase in the T1 slope 1 year after atlantoaxial fusion (odds ratio, 4.59; 95% confidence interval, 1.34-15.73; p=0.015).Conclusion: We found an association between the preoperative ADI and difference in the T1 slope after atlantoaxial fusion in the patients with RA. A preoperative ADI (>7.92 mm) was an independent predictor for the increase in the T1 slope after atlantoaxial fusion. Therefore, performing surgical treatment when the ADI is low would lead to better cervical sagittal alignment.

Rheumatoid Pannus Presenting as a Large Epidural Mass in the Subaxial Cervical Spine: A Case Report

2021 ◽  
Author(s):  
Nathan K Leclair ◽  
Joshua Knopf ◽  
Michael Baldwin ◽  
Faripour Forouhar ◽  
Hilary Onyiuke
Keyword(s):  
Case Report ◽  
Cervical Spine ◽  
Subaxial Cervical Spine
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