Biomechanical evaluation of four surgical techniques for ventral stabilization of the atlantoaxial joint in dogs

Autor(es)

Ferreira, Danyelle Rayssa Cintra ; Dias, Luls Gustavo Gosuen Goncalves ; Minto, Bruno Watanabe ; Rocha, Thiago Andre Salvitti de Sa ; Malta, Caio Afonso dos Santos ; da Conceicao, Maria Eduarda Bastos Andrade Moutinho ; de Lucena, Dayvid Vianeis Farias

• Tipo de documento: Artigo Científico
• Fonte: Acta Cirurgica Brasileira; v. 38, p. 11-pg., 2023-01-01.

Resumo

Purpose: This study compared, through biomechanical evaluation under ventral flexion load, four surgical techniques for ventral stabilization of the atlantoaxial joint in dogs. Methods: In total, 28 identical atlantoaxial joint models were created by digital printing from computed tomography images of a dog, and the specimens were divided into four groups of seven. In each group, a different technique for ventral stabilization of the atlantoaxial joint was performed: transarticular lag screws, polyaxial screws, multiple screws and bone cement (polymethylmethacrylate-PMMA), and atlantoaxial plate. After the stabilization technique, biomechanical evaluation was performed under ventral flexion load, both with a predefined constant load and with a gradually increasing load until stabilization failure. Results: All specimens, regardless of stabilization technique, were able to support the predefined load without failing. However, the PMMA method provided significant more rigidity (p <= 0.05) and also best resisted the gradual increase in load, supporting a significantly higher maximum force (p <= 0.05). There was no statistical difference in flexural strength between the transarticular lag screws and plate groups. The polyaxial screws method was significantly less resistant to loading (p < 0.05) than the other groups. Conclusion: The PMMA technique had biomechanical advantages in ventral atlantoaxial stabilization over the other evaluated methods. (AU)

• Processo FAPESP: 18/03464-1 - Avaliação biomecânica de quatro técnicas de estabilização ventral da articulação atlantoaxial de cão, utilizando corpos de prova com prototipagem rápida 3D
• Beneficiário: Danyelle Rayssa Cintra Ferreira
• Modalidade de apoio: Bolsas no Brasil - Mestrado