Related Experiment Video
Updated: Mar 21, 2026
Prone Lateral Minimally Invasive Retropleural Corpectomy Using a Rotatable Radiolucent Jackson Table
Published on: July 3, 2025
Morbidly Obese Patients Undergoing Reduced Cup Anteversion Through a Direct Lateral Approach
Steffen Brodt1, Benjamin Jacob1, Christoph Windisch1
1Orthopedic Department, Campus Eisenberg, University Hospital, Jena, Germany.
Background:
The presence of obesity negatively affects the results after total hip arthroplasty. The influence of morbid obesity on cup positioning is investigated.
Methods:
A retrospective analysis of radiographs from 790 patients in 2013 and 2014 was performed. The correlation of cup inclination and anteversion with body mass index (BMI) was analyzed. Three groups were formed: 139 patients with normal weight (BMI of <25 kg/m(2)), 566 patients with moderate obesity (BMI between 25 and 34 kg/m(2)), and 85 patients with morbid obesity (BMI of ≥35 kg/m(2)).
Results:
Cup anteversion significantly correlated with BMI (R = -0.127, p < 0.001) and patient age (R = 0.115, p = 0.001). This corresponded with a reduction of anteversion by 3.4° (p < 0.001) in the morbidly obese group compared with the normal-weight group. Cup inclination was not influenced by BMI or patient age.
Conclusions:
The precision of cup positioning declines with increasing obesity. In addition, significantly reduced anteversion is found in younger patients. We assume that this is due to iatrogenically changed pelvic tilt resulting from increased pressure exerted on the dorsal and ventral acetabular rim retractors.
Level Of Evidence:
Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.
More Related Videos
09:51The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
Published on: September 7, 2022
09:01Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018