Two-screw osteosynthesis is biomechanically superior to single-screw osteosynthesis for type II odontoid fractures.
Anterior approach
Biomechanical
Odontoid fracture
One screw
Osteosynthesis odontoid
Two screws
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
15 08 2024
15 08 2024
Historique:
received:
30
03
2024
accepted:
09
08
2024
medline:
16
8
2024
pubmed:
16
8
2024
entrez:
15
8
2024
Statut:
epublish
Résumé
The data on the use of a one- or two-screw technique (1S, 2S) for ventral osteosynthesis of type II dens fractures are contradictory. The aim was to design an apparatus to mimic the physiological conditions and test stability with 1S, 2S, and a headless compression screw (HCS) for osteosynthesis of artificially created type II odontoid fractures. The apparatus was mounted on a Zwick materials testing machine. A total of 18 C1-2 specimens were stratified into three groups (1S, 2S, HCS). Odontoid fractures were artificially created, and osteosynthesis was performed. Each specimen was tested at loads increasing from 1 to 40 N. Screw loosening was observed visually, by fatigue data, and by a camera tracking system. Analysis of the Zwick data and the camera data revealed a significant higher stability after 2S compared to 1S and HCS treatment (Zwick data: p = 0.021, camera data: p < 0.001), while visible screw loosening showed a superiority of the 2S only over HCS (p = 0.038). The developed apparatus allowed the dynamic study of the atlantoaxial joint with a high approximation to physiological conditions. The results demonstrated superiority of the 2S over the 1S and HCS in biomechanical stability in the treatment of type II odontoid fractures.
Identifiants
pubmed: 39147821
doi: 10.1038/s41598-024-69905-3
pii: 10.1038/s41598-024-69905-3
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
18947Informations de copyright
© 2024. The Author(s).
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