A 3D-Printed Simulator and Teaching Module for Placing S2-Alar-Iliac Screws.
3D printing
S2-alar-iliac screw
Simulation
Teardrop view
Journal
Operative neurosurgery (Hagerstown, Md.)
ISSN: 2332-4260
Titre abrégé: Oper Neurosurg (Hagerstown)
Pays: United States
ID NLM: 101635417
Informations de publication
Date de publication:
01 03 2020
01 03 2020
Historique:
received:
01
10
2018
accepted:
25
03
2019
pubmed:
25
6
2019
medline:
22
6
2021
entrez:
25
6
2019
Statut:
ppublish
Résumé
The concept of the S2-alar-iliac (S2AI) screw was developed approximately one decade ago and has rapidly become an important component of spinal arthrodesis. Two challenges to placing S2AI screws are gaining an intuition for free-hand screw placement trajectory and acquisition of the appropriate radiograph to both guide screw placement and diagnose misplacement. To present the design and manufacture of an S2AI screw placement simulator and teaching module that addresses both challenges. This simulator involves using a 3D printer to create a life-sized pelvis. Participants first used this print to practice placing free-hand S2AI screws. Then participants used another print to practice taking radiographs showing the posterior superior iliac spine-anterior superior iliac spine corridor (teardrop) view. The accuracy of screw placement increased from 17 to 80% on the left side and 7 to 100% on the right side. The number of radiographs taken by each participant to obtain the teardrop view decreased after practice with the simulator compared to baseline. Practice with the S2AI simulator led to an improved intuition of an appropriate free-hand S2AI screw trajectory and a decrease in the number of radiographs needed for obtaining the correct diagnostic view.
Sections du résumé
BACKGROUND
The concept of the S2-alar-iliac (S2AI) screw was developed approximately one decade ago and has rapidly become an important component of spinal arthrodesis. Two challenges to placing S2AI screws are gaining an intuition for free-hand screw placement trajectory and acquisition of the appropriate radiograph to both guide screw placement and diagnose misplacement.
OBJECTIVE
To present the design and manufacture of an S2AI screw placement simulator and teaching module that addresses both challenges.
METHODS
This simulator involves using a 3D printer to create a life-sized pelvis. Participants first used this print to practice placing free-hand S2AI screws. Then participants used another print to practice taking radiographs showing the posterior superior iliac spine-anterior superior iliac spine corridor (teardrop) view.
RESULTS
The accuracy of screw placement increased from 17 to 80% on the left side and 7 to 100% on the right side. The number of radiographs taken by each participant to obtain the teardrop view decreased after practice with the simulator compared to baseline.
CONCLUSION
Practice with the S2AI simulator led to an improved intuition of an appropriate free-hand S2AI screw trajectory and a decrease in the number of radiographs needed for obtaining the correct diagnostic view.
Identifiants
pubmed: 31232434
pii: 5522296
doi: 10.1093/ons/opz161
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
339-346Informations de copyright
Copyright © 2019 by the Congress of Neurological Surgeons.