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Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis

OBJECTIVE: To analyze the results of biomechanical assays of fixation of Pauwels type III femoral neck fracture in synthetic bone, using 7.5mm cannulated screws in inverted triangle formation, in relation to the control group. METHODS: Ten synthetic bones were used, from a domestic brand, divided in...

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Autores principales: Freitas, Anderson, Lula, Welder Fernandes, de Oliveira, Jonathan Sampaio, Maciel, Rafael Almeida, Souto, Diogo Ranier de Macedo, Godinho, Patrick Fernandes
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Sociedade Brasileira de Ortopedia e Traumatologia 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167045/
https://www.ncbi.nlm.nih.gov/pubmed/25246851
http://dx.doi.org/10.1590/1413-78522014220400917
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author Freitas, Anderson
Lula, Welder Fernandes
de Oliveira, Jonathan Sampaio
Maciel, Rafael Almeida
Souto, Diogo Ranier de Macedo
Godinho, Patrick Fernandes
author_facet Freitas, Anderson
Lula, Welder Fernandes
de Oliveira, Jonathan Sampaio
Maciel, Rafael Almeida
Souto, Diogo Ranier de Macedo
Godinho, Patrick Fernandes
author_sort Freitas, Anderson
collection PubMed
description OBJECTIVE: To analyze the results of biomechanical assays of fixation of Pauwels type III femoral neck fracture in synthetic bone, using 7.5mm cannulated screws in inverted triangle formation, in relation to the control group. METHODS: Ten synthetic bones were used, from a domestic brand, divided into two groups: test and control. In the test group, a 70° tilt osteotomy of the femoral neck was fixated using three cannulated screws in inverted triangle formation. The resistance of this fixation and its rotational deviation were analyzed at 5mm displacement (phase 1) and 10mm displacement (phase 2). The control group was tested in its integrity until the fracture of the femoral neck occurred. The Mann-Whitney test was used for group analysis and comparison. RESULTS: The values in the test group in phase 1, in samples 1-5, showed a mean of 579N and SD =77N. Rotational deviations showed a mean of 3.33°, SD = 2.63°. In phase 2, the mean was 696N and SD =106N. The values of the maximum load in the control group had a mean of 1329N and SD=177N. CONCLUSION: The analysis of mechanical strength between the groups determined a statistically significant lower value in the test group. Level of Evidence III, Control Case.
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spelling pubmed-41670452014-09-22 Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis Freitas, Anderson Lula, Welder Fernandes de Oliveira, Jonathan Sampaio Maciel, Rafael Almeida Souto, Diogo Ranier de Macedo Godinho, Patrick Fernandes Acta Ortop Bras Original Article OBJECTIVE: To analyze the results of biomechanical assays of fixation of Pauwels type III femoral neck fracture in synthetic bone, using 7.5mm cannulated screws in inverted triangle formation, in relation to the control group. METHODS: Ten synthetic bones were used, from a domestic brand, divided into two groups: test and control. In the test group, a 70° tilt osteotomy of the femoral neck was fixated using three cannulated screws in inverted triangle formation. The resistance of this fixation and its rotational deviation were analyzed at 5mm displacement (phase 1) and 10mm displacement (phase 2). The control group was tested in its integrity until the fracture of the femoral neck occurred. The Mann-Whitney test was used for group analysis and comparison. RESULTS: The values in the test group in phase 1, in samples 1-5, showed a mean of 579N and SD =77N. Rotational deviations showed a mean of 3.33°, SD = 2.63°. In phase 2, the mean was 696N and SD =106N. The values of the maximum load in the control group had a mean of 1329N and SD=177N. CONCLUSION: The analysis of mechanical strength between the groups determined a statistically significant lower value in the test group. Level of Evidence III, Control Case. Sociedade Brasileira de Ortopedia e Traumatologia 2014 /pmc/articles/PMC4167045/ /pubmed/25246851 http://dx.doi.org/10.1590/1413-78522014220400917 Text en http://creativecommons.org/licenses/by-nc/3.0/ All the content of the journal, except where otherwise noted, is licensed under a Creative Commons License.
spellingShingle Original Article
Freitas, Anderson
Lula, Welder Fernandes
de Oliveira, Jonathan Sampaio
Maciel, Rafael Almeida
Souto, Diogo Ranier de Macedo
Godinho, Patrick Fernandes
Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title_full Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title_fullStr Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title_full_unstemmed Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title_short Analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type Asnis
title_sort analysis of mechanical strength to fixing the femoral neck fracture in synthetic bone type asnis
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167045/
https://www.ncbi.nlm.nih.gov/pubmed/25246851
http://dx.doi.org/10.1590/1413-78522014220400917
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