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| Author(s): |
Laís Fernanda Sargi
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Jaboticabal. 2021-09-16. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2021-02-26 |
| Advisor: | Bruno Watanabe Minto |
| Abstract | |
The aim of the study was to evaluate the accuracy of a threedimensional surgical perforation guide for the caudal cervical vertebrae of dogs with an auxiliary guide in vertebral perforation, generating a direction to insert the screws in the vertebral pedicle. The direction was previously prepared, using computational means, based on the analysis of the vertebral bones of each dog, respecting the safe surgical corridors. For this, five canine cadavers were obtained at computed tomography (CT) with cuts of 1 mm thick, and as images in DICOM format of the C5 and C6 cervical vertebrae were exported to three-dimensional (3D) reconstruction software that the creation of a guide virtual perforation surgery based on the safe corridor of the vertebral pedicle for placing pedicle screws of 2.7 mm in diameter. After the creation and application of the virtual GP3D (control group), the patient-specific drilling guides were printed in 3D by the SLA method. Pedicle screws with the aid of GP3D were scientific in two groups: specimens (GEX) and biomodels printed in ABS (GBIO). The CT images adjusted in the postoperative period of the cadavers and biomodels were saved in JPEG format and sent to a program for the evaluation of the transverse angle of the perforations between the virtual and real screws by means of three-dimensional reconstruction and the tomographic image. There were no significant differences between the angles of the screw trajectories composed by the control group and between the trajectories of the groups ex vivo group (p> 0.05) and biomodel group (p> 0.05) reported in the left and right vertebral pedicle of C5 and C6. The evaluation of the screw trajectories by the three-dimensional reconstruction method and by computed tomography, there are also no important differences (p> 0.05). Do the following: the patient-specific surgical drilling guide model is favorable in helping to orient the drill for the introduction of no caudal cervical vertebral pedicle. (AU) | |
| FAPESP's process: | 18/24859-4 - Development of a patient-specific surgical drill guide for pedicle screw fixation in the lower cervical spine using rapid three-dimensional prototyping |
| Grantee: | Laís Fernanda Sargi |
| Support Opportunities: | Scholarships in Brazil - Master |