Accuracy of three-dimensionally printed animal-specific drill guides for implant placement in canine thoracic vertebrae: A cadaveric study.
Journal
Veterinary surgery : VS
ISSN: 1532-950X
Titre abrégé: Vet Surg
Pays: United States
ID NLM: 8113214
Informations de publication
Date de publication:
Feb 2021
Feb 2021
Historique:
received:
10
06
2020
revised:
07
10
2020
accepted:
26
11
2020
pubmed:
30
12
2020
medline:
20
4
2021
entrez:
29
12
2020
Statut:
ppublish
Résumé
To assess the accuracy of three-dimensionally (3-D) printed drill guides in constraining the trajectory of drill tracts for implants in canine thoracic vertebrae. Experimental ex vivo study. Five canine thoracic vertebral column specimens. Guides 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. Fifty-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. The 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. This 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.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
294-302Subventions
Organisme : Center for Additive Manufacturing and Logistics, North Carolina State University, Raleigh, North Carolina
Organisme : Merial Veterinary Scholars Program
Organisme : Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
Informations de copyright
© 2020 The American College of Veterinary Surgeons.
Références
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