CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2019; 54(06): 697-702
DOI: 10.1055/s-0039-1697015
Artigo Original
Sociedade Brasileira de Ortopedia e Traumatologia. Published by Thieme Revnter Publicações Ltda Rio de Janeiro, Brazil

Fixation of the Anterior Ligament Graft at the Tibial Pole: Biomechanical Analysis of Three Methods[*]

Article in several languages: português | English
Fernando Pessoa Weiss
1  Faculdade Evangélica do Paraná (FEPAR), Curitiba, Paraná, Brasil
,
Felipe Augusto de Aguiar Possoli
2  Programa de Pós-Graduação em Engenharia Mecânica e Materiais, Universidade Tecnológica Federal do Paraná (UTFPR), Curitiba, Paraná, Brasil
,
Isabel Ziesemer Costa
3  Departamento de Ortopedia e Traumatologia, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil
,
Paulo César Borges
4  Departamento de Mecânica, Universidade Tecnológica Federal do Paraná (UTFPR), Curitiba, Paraná, Brasil
,
5  Departamento de Ortopedia e Traumatologia, Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brasil
,
Luiz Fernando Kubrusly
1  Faculdade Evangélica do Paraná (FEPAR), Curitiba, Paraná, Brasil
› Author Affiliations
Further Information

Publication History

15 March 2018

28 May 2018

Publication Date:
13 December 2019 (online)

Abstract

Objective Comparative biomechanical analysis of tibial fixation strength for ligament reconstruction with interference screw compared with screw post and washer, and compared with the associated fixation of both methods (hybrid fixation).

Method A total of 54 specimens were used (porcine tibias and bovine flexor digital tendons), which were divided into three groups with fixation types similar to those used in anterior cruciate ligament (ACL) reconstruction: 1) fixation with interference screw; 2) fixation with screw post and toothed washer over knot and suture strand; and )- fixation with screw post and washer combined with interference screw (hybrid fixation). The analyses were performed through pull-out biomechanical tensile tests to determine the stiffness and load to system failure (yield load).

Results The hybrid fixation group presented a significantly higher final stiffness (59.10 ± 3.45 N/mm) in comparison to the other groups (p < 0.05) and a higher yield load (581.34 ± 33.48 N) compared to the interference screw group (p < 0.05).

Conclusion Hybrid fixation had biomechanical advantages over the bovine digital flexor graft fixation system in swine tibia during tensile tests.

* Study developed at Faculdade Evangélica do Paraná (FEPAR) and Universidade Tecnológica Federal do Paraná (UTFPR), Curitiba, Paraná, Brazil.