Mechanical parameter assessment of fresh human cancellous bone of the femoral head in atraumatic femoral head necrosis and primary coxarthrosis.

Autor: Fischer B; ZESBO - Centre for Research on Musculoskeletal Systems, Leipzig University, Leipzig, Germany; Institute of Anatomy, Leipzig University, Leipzig, Germany. Electronic address: benjamin.fischer@medizin.uni-leipzig.de., Reise R; ZESBO - Centre for Research on Musculoskeletal Systems, Leipzig University, Leipzig, Germany; Department of Orthopaedic, Trauma and Plastic Surgery, Leipzig University, Leipzig, Germany., Schleifenbaum S; ZESBO - Centre for Research on Musculoskeletal Systems, Leipzig University, Leipzig, Germany; Department of Orthopaedic, Trauma and Plastic Surgery, Leipzig University, Leipzig, Germany., Roth A; Department of Orthopaedic, Trauma and Plastic Surgery, Leipzig University, Leipzig, Germany.
Jazyk: angličtina
Zdroj: Clinical biomechanics (Bristol, Avon) [Clin Biomech (Bristol, Avon)] 2023 Aug; Vol. 108, pp. 106057. Date of Electronic Publication: 2023 Jul 28.
DOI: 10.1016/j.clinbiomech.2023.106057
Abstrakt: Background: Atraumatic femoral head necrosis is a rare pathological change of the femoral head. It is characterized by local necrosis of the cancellous bone as a result of reduced blood supply to the bone. Even today it remains unclear how to assess the hardness of the necrosis, whether it is soft tissue that is easily removed, or hard tissue that is difficult to resect.
Methods: Femoral heads with primary coxarthrosis were selected as a comparison group. For this purpose, 49 femoral heads obtained during total hip arthroplasty surgery with either condition (23 femoral head necrosis, 26 coxarthrosis) were transferred to the testing laboratory in fresh condition. Cylindrical specimens were obtained using a tenon cutter along the main trabecular load direction in the subchondral region of the femoral head. Additionally, thin bone slices were extracted proximal and distal to the specimens for density measurements. Brass plates were glued to the circular surfaces of the specimens. After curing of the adhesive, the specimens were mounted in the testing machine and destructive uniaxial compression tests were conducted.
Findings: The recorded mean compressive strengths and elastic moduli were almost identical for both groups, but the necrosis group showed significantly higher data scattering and range regarding the elastic modulus. The mean density of the coxarthrosis specimens was significantly higher than that of the necrotic specimens.
Interpretation: The mechanical properties of cancellous bone vary considerably in the presence of femoral head necrosis. The existence of hard necrosis implies a potential challenge regarding the clinical resection of these tissues.
Competing Interests: Declaration of Competing Interest Not applicable.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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