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Accuracy of three‐dimensionally printed animal‐specific drill guides for implant placement in canine thoracic vertebrae: A cadaveric study
- Source :
- Veterinary Surgery. 50:294-302
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Author(s): Mariani, Christopher L; Zlotnick, Joshua A; Harrysson, Ola; Marcellin-Little, Denis J; Malinak, Kristen; Gavitt, Ashley; Guevar, Julien | Abstract: ObjectiveTo assess the accuracy of three-dimensionally (3-D) printed drill guides in constraining the trajectory of drill tracts for implants in canine thoracic vertebrae.Study designExperimental ex vivo study.Sample populationFive canine thoracic vertebral column specimens.MethodsGuides to constrain drill trajectories were designed on the basis of computed tomographic (CT) imaging of six thoracic vertebrae (T8-T13) and were 3-D printed. The guides were used to create drill tracts in these vertebrae by both an experienced and a novice surgeon, and CT imaging was repeated. The entry point and angulation of actual and planned drill tracts were compared for both surgeons. Unintended cortical violations were also assessed by using a modified Zdichavsky classification.ResultsFifty-eight drill tracts were created in 30 vertebrae. Mean entry point deviation was 1.4 mm (range, 0.4-3.4), and mean angular deviation was 5.1° (range, 1.5°-10.8°). There were no differences between surgeons in entry point deviation (P = .07) or angular deviation (P = .22). There were no unintended cortical bone violations, and all drill tracts were classified as modified Zdichavsky grade I.ConclusionThe 3-D printed guides used in the current study yielded drill tracts with small linear and angular errors from intended paths and 100% accuracy for placement within vertebral pedicles and bodies. This technique was conveniently used by both an experienced and a novice surgeon.Clinical significanceThis technique might be immediately applicable to clinical cases requiring thoracic vertebral stabilization and may allow safe and accurate implant placement for surgeons with varying experience levels.
- Subjects :
- 040301 veterinary sciences
Bone Screws
education
Thoracic Vertebrae
Computed tomographic
0403 veterinary science
Thoracic vertebral column
03 medical and health sciences
Dogs
0302 clinical medicine
Cadaver
medicine
Animals
General Veterinary
Drill
business.industry
04 agricultural and veterinary sciences
Anatomy
Implant placement
Angular deviation
medicine.anatomical_structure
030220 oncology & carcinogenesis
Printing, Three-Dimensional
Thoracic vertebrae
Cortical bone
Tomography, X-Ray Computed
business
Cadaveric spasm
Subjects
Details
- ISSN :
- 1532950X and 01613499
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- Veterinary Surgery
- Accession number :
- edsair.doi.dedup.....3597490c629667a6672aa7a234e03be6