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CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2023; 58(04): e604-e610
DOI: 10.1055/s-0043-1768620
Artigo Original
Joelho

Analysis of the Mechanical Behavior of Porcine Graft Fixation in a Polyurethane Block Using a 3D-printed PLA Interference Screw[*]

Article in several languages: português | English
Juliana Pereira de Oliveira 
1   Engenheiro, Departamento de Engenharia e Tecnologia, Universidade Federal Rural do Semiárido, Mossoró, RN, Brasil
,
André Luigui Bezerra Santos 
1   Engenheiro, Departamento de Engenharia e Tecnologia, Universidade Federal Rural do Semiárido, Mossoró, RN, Brasil
,
Camilo Partezani Helito 
2   Ortopedista e Traumatologista, Departamento de ortopedia e Traumatologia, Instituto de Ortopedia e Traumatologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brasil
,
Rodrigo Nogueira de Codes 
1   Engenheiro, Departamento de Engenharia e Tecnologia, Universidade Federal Rural do Semiárido, Mossoró, RN, Brasil
,
Diego Ariel de Lima 
3   Médico, Departamento de Ciências da Saúde, Universidade Federal Rural do Semiárido, Mossoró, RN, Brasil
,
Diego Ariel de Lima 
3   Médico, Departamento de Ciências da Saúde, Universidade Federal Rural do Semiárido, Mossoró, RN, Brasil
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Abstract

Objective The interest in using 3D printing in the healthcare field has grown over the years, given its advantages and potential in the rapid manufacturing of personalized devices and implants with complex geometries. Thus, the aim of the present study was to compare the mechanical fixation behavior of a 3D-printed interference screw, produced by fused deposition modeling of polylactic acid (PLA) filament, with that of a titanium interference screw.

Methods Eight deep flexor porcine tendons, approximately 8 mm wide and 9 cm long, were used as graft and fixed to a 40 pounds-per-cubic-foot (PCF) polyurethane block at each of its extremities. One group was fixed only with titanium interference screws (group 1) and the other only with 3D-printed PLA screws (BR 20 2021 018283-6 U2) (group 2). The tests were conducted using an EMIC DL 10000 electromechanical universal testing machine in axial traction mode.

Results Group 1 (titanium) obtained peak force of 200 ± 7 N, with mean graft deformation of 8 ± 2 mm, and group 2 (PLA) obtained peak force of 300 ± 30 N, and mean graft deformation of 7 ± 3 mm. Both the titanium and PLA screws provided good graft fixation in the polyurethane block, with no slippage or apparent deformation. In all the samples, the test culminated in graft rupture, with around 20 mm of deformation in relation to the initial length.

Conclusion The 3D-printed PLA screw provided good fixation, similar to that of its titanium counterpart, producing satisfactory and promising results.

Keywords

bone screws - lactic acid - printing, three-dimensional

Financial Support

The present study received no financial support from any public, commercial, or not-for-profit sources.


* Trabalho desenvolvido na UFERSA - Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brasil.




Publication History

Received: 24 July 2022

Accepted: 18 October 2022

Article published online:
30 August 2023

© 2023. 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/)

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