Biomechanical evaluation of a new femoral stem design for total hip replacement in a canine model
Faria, Luís Guilherme de; Minto, Bruno Watanabe; Department of Medicine and Locomotive Apparatus RehabilitationShimano, Antonio Carlos; Department of Medicine and Locomotive Apparatus RehabilitationMacedo, Ana Paula; Department of Veterinary Clinic and SurgeryDiogo, Lucia Maria Izique; Department of Veterinary Clinic and SurgeryDreibi, Rafael Manzini; Department of Veterinary Clinic and SurgeryNobile, Matheus; Santos Junior, Wanderley Severo; Kawamoto, Fernando Yoiti Kitamura; Franco, Guilherme Galhardo; Dias, Luis Gustavo Gosuen Gonçalves.
Acta cir. bras;
36(5): e360506, 2021. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-1278104
Resumo
ABSTRACT Purpose To evaluate the biomechanical properties of a novel total hip replacement femoral stem. Methods Eight pairs of femurs from dog cadavers were used. The femurs were separated into different groups. A novel femoral stem with a convex proximal portion (Stem B) was biomechanically evaluated and compared to awell-known veterinary collared stem (Stem A). Femoral stems were inserted into the contralateral femurs from the same dog, forming 16 constructs. A flexo-compression load was applied on the axial axis of each sample. Maximum strength, deflection, stiffness, and energy absorption were analysed. Results Group B constructs showed significantly higher values (p ? 0.05) for the variables, except stiffness. The mean maximum strength was 1,347 ± 357 N for Group A and 1,805 ± 123 N for Group B (p ? 0.0069). The mean deflection was5.54 ± 2.63 mm for Group A and 10.03 ± 3.99 mm for Group B (p ? 0.0056). For the energy variable, the force was 6,203 ± 3,488 N/mm for Group A and 12,885 ± 5,056 N/mm for Group B (p ? 0.0054). Stem B had greater maximum strength, deflection, and energy. Conclusions The new stem was effective in neutralizing the impact of axial flexion-compression stresses during biomechanical tests in cadaveric models.
Biblioteca responsável:
BR1.1
Texto completo