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| Author(s): |
Matheus Nobile
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Jaboticabal. 2023-04-24. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2023-02-28 |
| Advisor: | Luis Gustavo Gosuen Gonçalves Dias |
| Abstract | |
The present study aimed to radiographically evaluate the occurrence of interfragmentary syndrome in femurs of cats (ex-vivo) with the use of a locked intramedullary nail associated with an interfragmentary compression device (patent BR 10 2018 016021 4) through minimally invasive osteosynthesis (MINO). For this purpose, cadavers of adult cats (n=16) were used, of which one specimen (n=1) was directed to the “pilot” test, while the rest (n=15) were directed to the definitive tests. All cases (right and left femurs) were evaluated by means of radiographic images, as a way of identifying anatomical alterations subject to exclusion. After selecting the ideal bones, computed tomography scans were also performed to measure the femoral anatomical axis, the proximal and distal lateral anatomical angles and the anteversion angle, bilaterally, prior to the medical procedure. The animals were randomly drawn into three groups, with 5 specimens each (10 femurs per group) and submitted to transverse osteotomies (access through the medial aspect of the thigh): G1-DP (osteotomy in the proximal femoral diaphysis of both femurs); G2-DM (middle diaphyseal femoral osteotomy) and G3-DD (distal diaphyseal femoral osteotomy). Then, the 30 femurs were radiographed again. After prior surgical planning, the angle stable locked intramedullary nail (AS-ILN) associated with Device 3 (BR 10 2018 016021 4) was placed in the femurs by the MINO technique and interfragmentary compression was performed. After the implantation of the interlocking nails in all feline cadavers (n=30 femurs), new radiographs and new computed tomography scans were taken to evaluate the bone position, the alignment, the achieved, the disposition of the placed implants and to statistically compare the results end points of the anatomical axes and the obtained angles, compared to the radiographs prior to the implantation of the interlocking nails, observing the presence or not of alterations. The results indicated that all gaps remained within the ideal or acceptable classification. There was no statistically significant difference between the pre- and post-implantation moments for the AaLDF (distal lateral anatomical angle of the femur). There was a significant difference only in the G2-DM group for the evaluation of the AaLPF (proximal lateral anatomical angle of the femur). All groups showed a statistically significant difference in relation to the AAF (femoral anteversion angle). It was concluded that the new implant model was effective in terms of performing interfragmentary compression on transverse lines performed on femurs of cat cadavers. (AU) | |
| FAPESP's process: | 21/03430-2 - Radiographic evaluation of the effectiveness of interfragmentary compression in femurs of cats (ex-vivo) with the use of interlocking nail associated with interfragmentary compression device (patent BR 10 2018 016021 4) through MINO |
| Grantee: | Matheus Nobile |
| Support Opportunities: | Scholarships in Brazil - Master |