Investigating Sagittal Spinopelvic Alignment and Equivalent Stress on the Femoral Head in Patients with Rapidly Destructive Coxarthrosis

Overview

Journal Eur J Orthop Surg Traumatol

Specialty Orthopedics

Date 2023 Sep 28

PMID 37770595

Authors

Kazuki Orita

Yaichiro Okuzu

Takayoshi Shimizu

Koji Goto

Yutaka Kuroda

Toshiyuki Kawai

Shuichi Matsuda

Affiliations

Soon will be listed here.

Abstract

Purpose: Rapidly destructive coxarthrosis (RDC) is a rare syndrome of unknown etiology. This study evaluated sagittal spinopelvic alignment (SSPA) in patients with RDC and compared it with that in patients with hip osteoarthritis (HOA). In addition, finite element analysis (FEA) was performed to investigate the distribution of stress on the femoral head in RDC versus HOA.

Methods: This retrospective study included patients who had undergone primary total hip arthroplasty for RDC (n = 33) and HOA (n = 99; age- and sex-matched to patients with RDC) at three hospitals from June 2014 to September 2020. Preoperative SSPA parameters and inflammatory blood markers were compared between the two groups. FEA on the computed tomography data was performed for four patients from each group with similar pelvic tilt (PT) and lateral center-edge angle (LCEA). The distribution of Drucker-Prager equivalent stress was assessed at the loaded area of the femoral head.

Results: Patients with RDC had significantly higher PT, lower sacral slope, decreased lumbar lordosis (LL), higher sagittal vertical axis, and higher pelvic incidence minus LL than patients with HOA, indicating sagittal spinal imbalance. Blood test revealed patients with RDC had higher levels of inflammation markers than patients with HOA. FEA revealed no statistically significant difference in the degree of stress concentration or the maximum equivalent stress between the two groups when PT and LCEA were comparable.

Conclusion: Patients with RDC tend to have sagittally imbalanced spine. Decreased acetabular coverage of the femoral head may heighten mechanical load of the hip joint in patients with RDC.

Citing Articles

The Presentation, Clinical Diagnosis, Risk Factors, and Management of Rapidly Progressive Hip Osteoarthritis: A Narrative Literature Review.

Oprisan A, Feier A, Zuh S, Russu O, Pop T J Clin Med. 2024; 13(20).

PMID: 39458144 PMC: 11509174. DOI: 10.3390/jcm13206194.

Letter to the Editor on "Investigating sagittal spinopelvic alignment and equivalent stress on the femoral head in patients with rapidly destructive coxarthrosis".

Ozudogru Celik T Eur J Orthop Surg Traumatol. 2023; 34(3):1731.

PMID: 38044335 DOI: 10.1007/s00590-023-03795-5.

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