The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength

Objective  Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods  Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane blocks with density of 10 PCF (0.16 g/cm3). I...

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Autores principales: Fleury, Rodrigo Barra Caiado, Shimano, Antônio Carlos, Matos, Thiago Dantas, Teixeira, Kelsen de Oliveira, Romero, Valéria, Defino, Helton Luiz Aparecido
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Thieme Revinter Publicações Ltda. 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7748926/
https://www.ncbi.nlm.nih.gov/pubmed/33364646
http://dx.doi.org/10.1055/s-0040-1710072
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author Fleury, Rodrigo Barra Caiado
Shimano, Antônio Carlos
Matos, Thiago Dantas
Teixeira, Kelsen de Oliveira
Romero, Valéria
Defino, Helton Luiz Aparecido
author_facet Fleury, Rodrigo Barra Caiado
Shimano, Antônio Carlos
Matos, Thiago Dantas
Teixeira, Kelsen de Oliveira
Romero, Valéria
Defino, Helton Luiz Aparecido
author_sort Fleury, Rodrigo Barra Caiado
collection PubMed
description Objective  Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods  Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane blocks with density of 10 PCF (0.16 g/cm3). Insertion torque and pullout strength were assessed. Results  The pullout strength of the rough surface and smooth surface screws did not differ, except in the group of 4.8 mm diameter screws. In this group, the rough surface screws showed greater resistance to pullout. Conclusion  Pedicle screws with a rough surface did not show increased pullout resistance in the acute phase of their insertion in polyurethane blocks compared to smooth surface screws. The rough surface screws had a higher insertion torque than the smooth surface screws, depending on the diameter of the screw and the preparation of the pilot hole.
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spelling pubmed-77489262020-12-22 The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength Fleury, Rodrigo Barra Caiado Shimano, Antônio Carlos Matos, Thiago Dantas Teixeira, Kelsen de Oliveira Romero, Valéria Defino, Helton Luiz Aparecido Rev Bras Ortop (Sao Paulo) Objective  Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods  Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane blocks with density of 10 PCF (0.16 g/cm3). Insertion torque and pullout strength were assessed. Results  The pullout strength of the rough surface and smooth surface screws did not differ, except in the group of 4.8 mm diameter screws. In this group, the rough surface screws showed greater resistance to pullout. Conclusion  Pedicle screws with a rough surface did not show increased pullout resistance in the acute phase of their insertion in polyurethane blocks compared to smooth surface screws. The rough surface screws had a higher insertion torque than the smooth surface screws, depending on the diameter of the screw and the preparation of the pilot hole. Thieme Revinter Publicações Ltda. 2020-12 2020-06-08 /pmc/articles/PMC7748926/ /pubmed/33364646 http://dx.doi.org/10.1055/s-0040-1710072 Text en Sociedade Brasileira de Ortopedia e Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ ) https://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.
spellingShingle Fleury, Rodrigo Barra Caiado
Shimano, Antônio Carlos
Matos, Thiago Dantas
Teixeira, Kelsen de Oliveira
Romero, Valéria
Defino, Helton Luiz Aparecido
The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title_full The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title_fullStr The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title_full_unstemmed The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title_short The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength
title_sort role of pedicle screw surface on insertion torque and pullout strength
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7748926/
https://www.ncbi.nlm.nih.gov/pubmed/33364646
http://dx.doi.org/10.1055/s-0040-1710072
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