CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2019; 54(01): 020-025
DOI: 10.1016/j.rbo.2017.09.011
Original Article | Artigo Original
Sociedade Brasileira de Ortopedia e Traumatologia. Published by Thieme Revnter Publicações Ltda Rio de Janeiro, Brazil

Development of a Patient-specific Guide for High Cervical Spine Fixation[*]

Article in several languages: português | English
1  Hospital Universitário Cajuru, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brasil
,
Emiliano Neves Vialle
1  Hospital Universitário Cajuru, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brasil
,
José Aguiomar Foggiattob
2  Núcleo de Prototipagem Ferramental, Departamento de Mecânica, Universidade Tecnológica Federal do Paraná, Curitiba, PR, Brasil
,
Kayo Winiccius Samuel Neves e Silva
2  Núcleo de Prototipagem Ferramental, Departamento de Mecânica, Universidade Tecnológica Federal do Paraná, Curitiba, PR, Brasil
,
Heraldo de Oliveira Mello Neto
3  Serviço de Radiologia, X-Leme, Curitiba, PR, Brasil
› Author Affiliations
Further Information

Publication History

16 August 2017

05 September 2017

Publication Date:
01 March 2019 (online)

Abstract

Objective

High cervical spine fixation represents a challenge for spine surgeons due to the complex anatomy and the risks of vascular and medullar injury. The recent advances in 3-D printing have unfolded a whole new range of options for these surgeons.

Methods

In the present study, a guide for the placement of the lateral mass screw in the C1 vertebra was developed using 3-D printing. Eight real-size models of the high cervical spine and their respective screw guides were built using computed tomography (CT) scan images. The guidewires were inserted with the help of the printed guides and then the models were analyzed with the help of CT scan images.

Results

All of the guidewires in the present study obtained a safe placement in the models, avoiding the superior and inferior articular surfaces, the vertebral foramen, and the vertebral artery.

Conclusion

The present study demonstrated the efficiency of the guide, a reliable tool for aiding the insertion of guidewires for screws in lateral masses of the C1.

* Work developed at the Hospital Universitário Cajuru, Curitiba, PR, Brazil.