Semester of Graduation
Master of Science (MS)
School of Veterinary Medicine
The objective of this study was to improve the accuracy of drilling during the repair of sacroiliac luxation with a 3D-printed patient-specific drill guide (3D-GDT) compared to free-hand drilling technique (FHDT). A blinded, randomized, prospective study was performed including sixteen canine cadavers (20-25 kg) euthanized for reasons not related to the study. Dorsal, bilateral, sacroiliac luxations (SILs) were created experimentally. A pelvic CT was performed pre- and post-drilling. The FHDT was drilled followed by 3D-GDT for each sacrum. CT and 3D measurements of craniocaudal and dorsoventral angles were compared between FHDT and 3D-GDT, as well as deviations of entry and exit points relative to optimal trajectory.
Mean craniocaudal and dorsoventral angles for both CT and 3D measured 3D-GDT (CT 4.2o±3.9 and 3.9o±3.2, respectively; 3D 5.1o±5.1 and 2.8o±2.3 respectively p=0.0006) were lower compared to FHDT (CT 11.8o±4.0, p o ±6.1, p=0.01; 3D 12.4o±5.9, p=0.0006 and 5.3o±5.24, p=0.05) respectively. Entry dorsoventral and end craniocaudal, dorsoventral and 3D linear deviations were reduced with the 3D-GDT. Sacral corridor disruption was present more in FHDT (20%, 3/15) than 3D-GDT (0%). CT and 3D analyses were in strong agreement (r=0.77).
Deviations of drill trajectories were minimized relative to optimal trajectories with the 3D-GDT compared to the FHDT in the dorsoventral and craniocaudal planes. The 3D-GDT improves accuracy of sacral drilling compared to FHDT in canine cadavers.
McCarthy, Daniel, "ACCURACY OF A SACRAL DRILLING WITH A CUSTOM 3D PRINTED DRILLING GUIDE OR FREE-HAND TECHNIQUE IN CANINE EXPERIMENTAL SACROILIAC LUXATION" (2022). LSU Master's Theses. 5525.
Gines, J. Alberto