[Translated article] Significant improvement in axial load stability with the pre-tensioned pelvic external fixator: A biomechanical analysis in a model with type C Tile lesion.

Autor: Durán Garrido FJ; Unidad de Cirugía Ortopédica y Traumatología, Hospital Universitario Virgen de La Victoria, Málaga, Spain. Electronic address: javiduran91@hotmail.com., Pérez de la Blanca A; Escuela de Ingenierías industriales, Universidad de Málaga, Málaga, Spain., Lombardo Torre M; Unidad de Cirugía Ortopédica y Traumatología, Hospital Universitario Virgen de La Victoria, Málaga, Spain., Delgado Rufino B; Unidad de Cirugía Ortopédica y Traumatología, Hospital Universitario Virgen de La Victoria, Málaga, Spain., Peña Trabalón A; Escuela de Ingenierías industriales, Universidad de Málaga, Málaga, Spain., Queipo de Llano Temboury A; Unidad de Cirugía Ortopédica y Traumatología, Hospital Universitario Virgen de La Victoria, Málaga, Spain.
Jazyk: English; Spanish; Castilian
Zdroj: Revista espanola de cirugia ortopedica y traumatologia [Rev Esp Cir Ortop Traumatol] 2023 Mar-Apr; Vol. 67 (2), pp. T125-T133. Date of Electronic Publication: 2022 Dec 14.
DOI: 10.1016/j.recot.2022.12.008
Abstrakt: Objective: The aim of our work is to check if the use of a pre-tensed bar connected to 2 supra-acetabular Schanz pins is more stable in a pelvic with a tile C1 injury.
Material and Methods: We used synthetic pelvis (N = 5) with a unstable vertical injury, stabilized with both the standard and the pre-tensed system. They both were submitted to axial loading. We measured applied forces and the position of markers that were positioned in the sacroiliac and symphysis joints. We determined the relative movements between injured surfaces, rigidity, resistance and when each system failed.
Results: When using the pre-tensed fixator, the rigidity was much higher in the sacro-iliac joint(P=.043) being 3.45 times higher, being also 2.06 times higher in pubic symphysis (P=.043). The resistance against failure was 2 times higher too (P=.043).
Discussion: The increased axial stability with the pre-tensed external fixator accords with its ability to make active compression in both posterior and anterior elements of the pelvic ring, which was previously demonstrated. This result supports the preliminary clinic outcomes that were obtained.
Conclusions: The pre-tensed external fixator increases the axial stability of the pelvic ring's posterior elements in a synthethic pelvis with a Tile C1 injury, without decreasing it's capacity to achieve an anterior stability.
(Copyright © 2022 SECOT. Publicado por Elsevier España, S.L.U. All rights reserved.)
Databáze: MEDLINE
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