Dataset related to article "The Role of the 'Femur First' Technique and Spinopelvic Characteristics in achieving the Combined Sagittal Index in Total Hip Arthroplasty: results from a retrospective tertiary-center clinical study"

This record contains raw data related to article "The Role of the 'Femur First' Technique and Spinopelvic Characteristics in achieving the Combined Sagittal Index in Total Hip Arthroplasty: results from a retrospective tertiary-center clinical study"

Abstract

Background: Emerging parameters, such as the spino-pelvic unit and the combined sagittal index (CSI), are gaining importance in evaluating and optimizing implant positioning in total hip arthroplasty (THA). Our institution adopts the “femur first” technique to achieve the desired combined anteversion (CA). The purpose of the study is to evaluate the role of the 'femur first' technique and spinopelvic characteristics in achieving the CSI_standing ‘safe zone’ in primary THA. Methods: Consecutive patients undergoing primary THA were included in the present retrospective study. All patients underwent radiographic assessments in standing position with the EOS 2D/3D radiography system. Results: Forty patients (40 hips) were enrolled. 34 patients fell inside the CSI_standing “safe zone” (205°-245°). When considering the restricted CSI_standing “safe zone” for patients at high risk for adverse spinopelvic characteristics (215°-245°) only 16 patients laid inside the range. We demonstrated a positive linear correlation between CSI_standing and CA (p <0.0001). Pelvic tilt (PT) showed a positive correlation both in standing and in relaxed sitting position, (p<0.001). Sacral slope (SS) showed a significant positive correlation in relaxed sitting (p=0.003) position but not in standing position (p=0.34). The correlation analysis between CSI_{relaxed-sitting} and ΔSS showed a positive correlation (p=0.003). Conclusions: The “femur first” technique is able to achieve the CSI “safe zone” in most patients, however it seems insufficient in those with adverse spinopelvic characteristics, who are at higher risk of dislocation. Moreover, the CA, the position of the pelvis in the space (PT) and its mobility (ΔSS) greatly influence the CSI “safe zone” in patients undergoing primary THA.