A Novel Patient-Specific Drill Guide Template for Pedicle Screw Insertion into the Subaxial Cervical Spine Utilizing Stereolithographic Modelling: An In Vitro Study
| Autor: | Giorgio Delgado, Samuel Arsenio Munoz Grozman, Rafael C Bundoc |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Orthodontics
030222 orthopedics medicine.medical_specialty Drill business.industry Drill guide Cervical spine Surgery law.invention 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure law Cadaver medicine Orthopedics and Sports Medicine Cadaveric spasm Pedicle screw business 030217 neurology & neurosurgery Stereolithography Cervical vertebrae |
| Zdroj: | Asian Spine Journal. 11:4-14 |
| ISSN: | 1976-7846 1976-1902 |
| DOI: | 10.4184/asj.2017.11.1.4 |
| Popis: | Study DesignCadaveric study.PurposeThe purpose of this study was to assess the accuracy and feasibility of cervical pedicle screw (CPS) insertion into the subaxial cervical spine placed using a patient-specific drill guide template constructed from a stereolithographic model.Overview of LiteratureCPS fixation is an invaluable tool for posterior cervical fixation because of its biomechanical advantages. The major drawback is its narrow corridor that allows very little clearance for neural and vascular injuries.MethodsFifty subaxial pedicles of the cervical vertebrae from five cadavers were scanned into thin slices using computed tomography (CT). Digital imaging and communications in medicine images of the cadaver spine were digitally processed and printed to scale as a three-dimensional (3D) model. Drill guide templates were manually moulded over the 3D-printed models incorporating pins inserted in the pedicles. The drill guide templates were used for precise placement of the drill holes in the pedicles of cadaveric specimens for pedicle screw fixation.ResultsThe instrumented cadaveric spines were subjected to CT to assess the accuracy of our pedicle placement by an external observer. Our patient-specific drill guide template had an accuracy of 94%.ConclusionsThe use of a patient-specific drill guide constructed using stereolithography improved the accuracy of CPS placement in a cadaveric model. |
| Databáze: | OpenAIRE |
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