School of Medicine Publications and Presentations
Variation in Functional Pelvic Tilt in Female Patients Undergoing Total Hip Arthroplasty With Acetabular Dysplasia
Document Type
Article
Publication Date
6-2023
Abstract
Background
As the pelvis is a dynamic structure, the quantification of pelvic tilt (PT) should be done in different hip positions prior to total hip arthroplasty (THA). We sought to investigate functional PT in young female patients undergoing THA and explore the correlation of PT with the extent of acetabular dysplasia. Additionally, we aimed to define the PS-SI (pubic symphysis-sacroiliac joint) index as a PT quantifier on AP pelvis X-ray.
Methods
Pre-THA female patients under the age of 50 years (n = 678) were investigated. Functional PT in 3 positions (supine, standing, and sitting) were measured. Hip parameters including lateral center-edge angle (LCEA), Tönnis angle, head extrusion index (HEI), and femoro-epiphyseal acetabular roof (FEAR) index were correlated to PT values. The PS-SI/SI-SH (sacroiliac joint-sacral height) ratio was also correlated to PT.
Results
From the 678 patients, 80% were classified as having acetabular dysplasia. Among these patients, 50.6% were bilaterally dysplastic. The mean functional PT of the entire patient group was 7.4°, 4.1°, and −1.3° in the supine, standing and seated positions. The mean functional PT of the dysplastic group was 7.4°, 4.0°, and −1.2° in the supine, standing and seated positions. The PS-SI/SI-SH ratio was found to be correlated to PT.
Conclusion
Most of the pre-THA patients had acetabular dysplasia and exhibited anterior PT in the supine and standing positions, most pronounced in the standing position. PT values were comparable between the dysplastic and non-dysplastic group without change with worsening dysplasia. PS-SI/SI-SH ratio can be used to easily characterize PT.
Recommended Citation
Cha, M. J., Xi, Y., Chhabra, A., Pierrepont, J., Jones, T., Hohman, D., & Wells, J. (2023). Variation in functional pelvic tilt in female patients undergoing total hip arthroplasty with acetabular dysplasia. The Journal of Arthroplasty. https://doi.org/10.1016/j.arth.2023.05.062
Publication Title
The Journal of Arthroplasty
DOI
10.1016/j.arth.2023.05.062
Academic Level
medical student
Comments
Original published version available at https://doi.org/10.1016/j.arth.2023.05.062
Originally submitted preprint to ScholarWorks.