Fossa-Foveolar Mismatch Is Highest in Dysplastic Hips and During External Rotation.

Vera M Stetzelberger, Cem Cek, Jannine T Segessenmann, Vlad Popa, Corinne A Zurmuehle, Joseph M Schwab, Moritz Tannast

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Article in Arthroscopy, sports medicine, and rehabilitation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Vera M StetzelbergerDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Cem CekDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Jannine T SegessenmannDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Vlad PopaDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Corinne A ZurmuehleDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Joseph M SchwabDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Moritz TannastDepartment of Orthopaedic Surgery and Traumatology, HFR Cantonal Hospital, University of Fribourg, Fribourg, Switzerland.

Funding

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6 · The paper itself

Abstract

Purpose: To identify which hip pathomorphologies and motions are associated with a high fossa-foveolar mismatch (FFM) index. Methods: Three-dimensional models of hips with femoroacetabular impingement syndrome or developmental dysplasia of the hip (DDH) and control hips were analyzed. Simulations of the physiological range of motion and impingement tests were performed using validated collision detection software. The FFM index-the proportion of the fovea tracking outside the acetabular fossa-was calculated for each motion. Results: A total of 183 hips with femoroacetabular impingement syndrome and 22 control hips were included. DDH hips showed the highest FFM index (median 0.4), followed by hips with excessive femoral version (median 0.3). Controls had the lowest values (median 0.2). External rotation had the highest FFM in all groups. Motions such as flexion, extension, and abduction had the lowest FFM values. Conclusions: DDH and excessive femoral version were linked to increased FFM, while hips from the control group presented the lowest mismatch. From all analyzed motions, the highest FFM was found in external rotation in all groups. Level of Evidence: Level III, retrospective cohort study.

Identifiers

PMID41541516

DOI10.1016/j.asmr.2025.101288

PMCPMC12800802

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