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| Author(s): |
Danyelle Rayssa Cintra Ferreira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Jaboticabal. 2020-05-23. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2020-02-20 |
| Advisor: | Luís Gustavo Gosuen Gonçalves Dias |
| Abstract | |
The aim of this study was to compare, after biomechanical evaluation under ventral flexion load, four ventral stabilization techniques of the atlantoaxial joint of dogs, using 3D printing prototypes and atlantoaxial three-dimensional drill guide (AA3DDG). Twenty-eight prototypes, which represented atlas and axis models of dogs in subluxation condition due to agenesis of the odontoid process, were printed three-dimensionally in polylactic acid and distributed into four groups. Each group represented a ventral stabilization technique of the atlantoaxial joint: poliaxial screws, transarticular lag screws, multiple screws and bone cement (PMMA) and a novel atlantoaxial plate. Three AA3DDG were manufactured and each was used while performing one of the following techniques: poliaxial screws, transarticular lag screws and multiple screws and PMMA. After performing the techniques, the prototypes were submitted to biomechanical evaluation under ventral flexion load and, after obtaining the results, it was possible to compare the techniques. All four stabilization methods were able to perform physiological load support without evidence of failure, however, the multiple screws and PMMA method proved to be significantly more rigid (p≤0.05) than the other techniques.The cemented construction was also the one that best resisted the acute increase in the load of ventral flexion, supporting maximum force significantly greater (p≤0.05) than the other methods. There was no statistical difference in flexural strength between the transarticular lag screws and atlantoaxial plate groups. The poliaxial screws method was significantly less resistant (p≤0.05) to flexion than the other groups. Therefore, the multiple screw and bone cement technique revealed important biomechanical advantages, being less prone to failure than the other methods evaluated. (AU) | |
| FAPESP's process: | 18/03464-1 - Biomechanical evaluation of four ventral fixation methods for stabilization of the atlantoaxial joint of dog, using models with rapid prototyping 3D |
| Grantee: | Danyelle Rayssa Cintra Ferreira |
| Support Opportunities: | Scholarships in Brazil - Master |