Static bending test after proximal femoral nail (PFN) removal - in vitro analysis
Abstract Objective To evaluate, through biomechanical testing, the resistance to and energy required for the occurrence of proximal femoral fracture in synthetic bone after removal of a proximal femoral nail model (PFN), comparing the results obtained with a reinforcement technique using polymethyl...
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Sociedade Brasileira de Ortopedia e Traumatologia
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| Series: | Revista Brasileira de Ortopedia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162017000700052&lng=en&tlng=en |
| _version_ | 1797332019426885632 |
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| author | Leonardo Morais Paiva Sílvio Leite de Macedo Neto Diogo Ranier de Macedo Souto George Neri Barros Ferreira Hélio Ismael da Costa Anderson Freitas |
| author_facet | Leonardo Morais Paiva Sílvio Leite de Macedo Neto Diogo Ranier de Macedo Souto George Neri Barros Ferreira Hélio Ismael da Costa Anderson Freitas |
| author_sort | Leonardo Morais Paiva |
| collection | DOAJ |
| description | Abstract Objective To evaluate, through biomechanical testing, the resistance to and energy required for the occurrence of proximal femoral fracture in synthetic bone after removal of a proximal femoral nail model (PFN), comparing the results obtained with a reinforcement technique using polymethylmethacrylate (PMMA). Methods Fifteen synthetic bones were used: five units for the control group (CG), five for the test group without reinforcement (TGNR), and five for the test group with reinforcement (TGR). The biomechanical analysis was performed simulating a fall on the trochanter using a servo-hydraulic machine. In the GC, the assay was performed with the PFN intact. In the TGNR and TGR groups, a model of PFN was introduced and the tests were performed in the TGNR, after simple removal of the synthesis material, and in the TGR, after removal of the same PFN model and filling of the cavity in the femoral neck with PMMA. Results All groups presented a basicervical fracture. The CG presented a mean of 1427.39 Newtons (N) of maximum load and 10.14 Joules (J) of energy for the occurrence of the fracture. The TGNR and TGR presented 892.14 N and 1477.80 N of maximum load, and 6.71 J and 11.99 J of energy, respectively. According to the Kruskal-Wallis ANOVA, there was a significant difference in the maximum load (p = 0.009) and energy (p = 0.007) between these groups. Conclusion The simple removal of a PFN in synthetic bone showed a significant reduction of the maximum load and energy for the occurrence of fracture, which were re-established with a reinforcement technique using PMMA. |
| first_indexed | 2024-03-08T07:43:36Z |
| format | Article |
| id | doaj.art-0ca0525db021460d9c35420520d76ec8 |
| institution | Directory Open Access Journal |
| issn | 1982-4378 |
| language | English |
| last_indexed | 2024-03-08T07:43:36Z |
| publisher | Sociedade Brasileira de Ortopedia e Traumatologia |
| record_format | Article |
| series | Revista Brasileira de Ortopedia |
| spelling | doaj.art-0ca0525db021460d9c35420520d76ec82024-02-02T16:42:30ZengSociedade Brasileira de Ortopedia e TraumatologiaRevista Brasileira de Ortopedia1982-437852suppl 1525610.1016/j.rboe.2017.01.008S0102-36162017000700052Static bending test after proximal femoral nail (PFN) removal - in vitro analysisLeonardo Morais PaivaSílvio Leite de Macedo NetoDiogo Ranier de Macedo SoutoGeorge Neri Barros FerreiraHélio Ismael da CostaAnderson FreitasAbstract Objective To evaluate, through biomechanical testing, the resistance to and energy required for the occurrence of proximal femoral fracture in synthetic bone after removal of a proximal femoral nail model (PFN), comparing the results obtained with a reinforcement technique using polymethylmethacrylate (PMMA). Methods Fifteen synthetic bones were used: five units for the control group (CG), five for the test group without reinforcement (TGNR), and five for the test group with reinforcement (TGR). The biomechanical analysis was performed simulating a fall on the trochanter using a servo-hydraulic machine. In the GC, the assay was performed with the PFN intact. In the TGNR and TGR groups, a model of PFN was introduced and the tests were performed in the TGNR, after simple removal of the synthesis material, and in the TGR, after removal of the same PFN model and filling of the cavity in the femoral neck with PMMA. Results All groups presented a basicervical fracture. The CG presented a mean of 1427.39 Newtons (N) of maximum load and 10.14 Joules (J) of energy for the occurrence of the fracture. The TGNR and TGR presented 892.14 N and 1477.80 N of maximum load, and 6.71 J and 11.99 J of energy, respectively. According to the Kruskal-Wallis ANOVA, there was a significant difference in the maximum load (p = 0.009) and energy (p = 0.007) between these groups. Conclusion The simple removal of a PFN in synthetic bone showed a significant reduction of the maximum load and energy for the occurrence of fracture, which were re-established with a reinforcement technique using PMMA.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162017000700052&lng=en&tlng=enQuadrilFraturas de quadrilOsteoporosePolimetilmetacrilato |
| spellingShingle | Leonardo Morais Paiva Sílvio Leite de Macedo Neto Diogo Ranier de Macedo Souto George Neri Barros Ferreira Hélio Ismael da Costa Anderson Freitas Static bending test after proximal femoral nail (PFN) removal - in vitro analysis Revista Brasileira de Ortopedia Quadril Fraturas de quadril Osteoporose Polimetilmetacrilato |
| title | Static bending test after proximal femoral nail (PFN) removal - in vitro analysis |
| title_full | Static bending test after proximal femoral nail (PFN) removal - in vitro analysis |
| title_fullStr | Static bending test after proximal femoral nail (PFN) removal - in vitro analysis |
| title_full_unstemmed | Static bending test after proximal femoral nail (PFN) removal - in vitro analysis |
| title_short | Static bending test after proximal femoral nail (PFN) removal - in vitro analysis |
| title_sort | static bending test after proximal femoral nail pfn removal in vitro analysis |
| topic | Quadril Fraturas de quadril Osteoporose Polimetilmetacrilato |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162017000700052&lng=en&tlng=en |
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