Radiographic evaluation of the effectiveness of interfragmentary compression in tibia of cats (ex-vivo) using a stable-angle interlocking nail associated with an interfragmentary compression device (patent BR 10 2018 016021 4) by MINO

Author(s)

Renato Barroco Neto

• 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 Gosuen

Abstract

The objective was to radiographically evaluate the occurrence of interfragmentary symptoms in cat tibias (ex-vivo) using a stable angle intramedullary pressure associated with an interfragmentary symptoms device (patent BR 10 2018 016021 4) by means of minimally invasive osteosynthesis (MINO). For this purpose, cadavers of adult cats (n=15) were used. All cases (right and left tibias) were evaluated by means of radiographic images (M1 – moment 1), as a way to identify anatomical alterations subject to exclusion, planning and selection of the dimensions of the orthopedic implants and also for the identification of the tibial mechanical axis, from the proximal and distant angles in the sagittal and frontal planes. Subsequently, after this selection, these caves were also submitted to computed tomography scans for torsional estimates, analyzes performed prior to the implementation of the implantation technique in cases. These animals were randomly drawn into three groups, with 5 specimens each. Then, the 30 tibias were radiographed again (M2 – moment 2). After previous planning, the nails were placed in the tibias using the MINO technique and interfragmentary administration was performed. after the implantation of the nails in all the feline cadavers, new radiographs were taken (M3 – moment 3) to evaluate the bone position, the transformation of the interfragmentary, the result achieved, the arrangement of the fixed implants, and also new radiographs so that the evaluation torsion was performed, statistically comparing the final results of the curricula obtained, compared to the previous images (M1). The results showed that the overload generated was satisfactory, with bone gaps varying between 0 and 0.5 mm, and also found that there was a significant difference between the points where the osteotomies were performed, that is, in all the evaluated variables, the cutting position did not show statistical difference regarding the difference in angle pre and post implantation. (AU)

• FAPESP's process: 21/11480-0 - Radiographic evaluation of the effectiveness of interfragmentary compression in tibia of cats (ex-vivo) with the use of blocked intramedular stem associated with an interfragmentary compression device (patent br 10 2018 016021 4) by mino
• Grantee: Renato Barroco Neto
• Support Opportunities: Scholarships in Brazil - Master