Biomechanical study in dogs thoracolumbar spines with technics of stabilization using PIN with methylmethacrylate, modified segmental stabilization, locking plate and clamp rod internal fixation

• Grant number: 11/19972-7
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2012
• End date: June 30, 2014
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Clinics and Surgery
• Principal Investigator: Cassio Ricardo Auada Ferrigno
• Grantee: Cassio Ricardo Auada Ferrigno
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Spinal fractures and luxations resulting from a trauma are a frequently seen neurological disease in veterinary practice and in many cases surgical treatment is necessary. There are many types of implants for spinal stabilization; however few studies of the thoracolumbar region of the spine were carried out to evaluate the biomechanical properties of each technic. The objective of this study is to compare biomechanically, the strength and stifness promoted by four different technics of stabilization on this region (pin with methylmethacrylate, modified segmental stabilization, locking plate and clamp rod internal fixation) under bending forces. Twenty eight specimens of thoracolumbar spines of dogs will suffer iatrogenic luxation of the T13/L1 vertebral bodies. They will be divided into four groups, each fixated by one of the above mentioned implants. In order to perform the biomechanical tests, a Kratos 5000 testing machine (model KE3000MP, serie M1012931 and load cell of 100 Kg) will be used. For each specimen two biomechanical tests will be performed: the control test, with the healthy spine and after its disarticulation and fixation with one of the proposed technics. (AU)