Influence of sagittal degenerative spondylolisthesis on anteversion of the acetabular component in total hip arthroplasty

Creating Consensus in the Definition of Spinopelvic Mobility

“…Most frequently, standing and upright or relaxed-seated radiographs are used. [13][14][15][16][17][18][19][20][22][23][24][25][33][34][35][36][37][38][39][40][41][42][43][44][45][46] Alternatively, step-up and forward-leaning or flexed-seated radiographs demonstrate the relationship between the femur and the pelvis in at-risk activities, evaluating extreme hip extension with posterior pelvic tilt and extreme hip flexion with anterior pelvic tilt, respectively. 12,21,31,32,[47][48][49][50][51][52][53][54][55][56][57][58][59][60] Radiographs with extreme positioning are well suited to reveal impingement and dislocation risk; however, such positioning can underestimate or reverse the direction of pelvic motion compared with relaxed positioning.…”