Not All Hips Follow the Same Rules in THA

Dynamic modeling suggested flatback deformity lowered target combined anteversion, while stiff pelvic mobility narrowed the acceptable range

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Patients with flatback deformity had lower combined anteversion midpoint targets compared to those with normal spinopelvic alignment after total hip arthroplasty.
2

Stiff spinopelvic mobility resulted in a narrower acceptable anteversion range, indicating reduced compensatory pelvic motion during functional activities.
3

Greater pelvic incidence-lumbar lordosis mismatch was linked to lower midpoint combined anteversion values, with a 2-degree decrease for every 10-degree increase in mismatch.
4

The study suggests individualized acetabular component planning for patients with spinopelvic abnormalities to enhance impingement-free range of motion.
5

Limitations included postoperative assessment of spinopelvic alignment and lack of patient-reported outcomes, which may affect the study's conclusions.

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