Increased pelvic incidence may lead to arthritis and sagittal orientation of the facet joints at the lower lumbar spine

BMC Medical Imaging

Research Article

Ksenija Slankamenac¹  Samy Bouaicha¹  Thorsten Jentzsch¹  James Geiger¹  Clément ML Werner¹  Thi Dan Linh Nguyen-Kim² 

[1]Division of Trauma Surgery, Department of Surgery, University Hospital Zuerich, Zuerich, Switzerland

[2]Institute of Diagnostic and Interventional Radiology, University Hospital Zuerich, Zuerich, Switzerland

关键词: Pelvic incidence;    Age;    Gender;    Lumbar Lordosis;    Facet joint arthritis;    Orientation;   

DOI  :  10.1186/1471-2342-13-34

 received in 2013-05-28, accepted in 2013-11-01,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundCorrect sagittal alignment with a balanced pelvis and spine is crucial in the management of spinal disorders. The pelvic incidence (PI) describes the sagittal pelvic alignment and is position-independent. It has barely been investigated on CT scans. Furthermore, no studies have focused on the association between PI and facet joint (FJ) arthritis and orientation. Therefore, our goal was to clarify the remaining issues about PI in regard to (1) physiologic values, (2) age, (3) gender, (4) lumbar lordosis (LL) and (5) FJ arthritis and orientation using CT scans.MethodsWe retrospectively analyzed CT scans of 620 individuals, with a mean age of 43 years, who presented to our traumatology department and underwent a whole body CT scan, between 2008 and 2010. The PI was determined on sagittal CT planes of the pelvis by measuring the angle between the hip axis to an orthogonal line originating at the center of the superior end plate axis of the first sacral vertebra. We also evaluated LL, FJ arthritis and orientation of the lumbar spine.Results596 individuals yielded results for (1) PI with a mean of 50.8°. There was no significant difference for PI and (2) age, nor (3) gender. PI was significantly and linearly correlated with (4) LL (p = < 0.0001). Interestingly, PI and (5) FJ arthritis displayed a significant and linear correlation (p = 0.0062) with a cut-off point at 50°. An increased PI was also significantly associated with more sagitally oriented FJs at L5/S1 (p = 0.01).ConclusionPI is not correlated with age nor gender. However, this is the first report showing that PI is significantly and linearly associated with LL, FJ arthritis and more sagittal FJ orientation at the lower lumbar spine. This may be caused by a higher contact force on the lower lumbar FJs by an increased PI. Once symptomatic or in the event of spinal trauma, patients with increased PI and LL could benefit from corrective surgery and spondylodesis.

【 授权许可】

CC BY   
© Jentzsch et al.; licensee BioMed Central Ltd. 2013