What is the Effect of Pedicle Screw Reinsertion Through the Same Trajectory on Pullout Strength?
Turk Neurosurg
; 32(4): 635-640, 2022.
Article
em En
| MEDLINE
| ID: mdl-35147969
ABSTRACT
AIM:
To investigate the pullout strength of a pedicle screw reinserted through the same trajectory MATERIAL andMETHODS:
Fifty freshly frozen lamb L4 vertebrae were divided into the following five groups Group 1, inserted with a 5-mm pedicle screw; Group 2, inserted with a 5-mm pedicle screw followed by the removal and reinsertion of the same screw after control; Group 3, inserted with a 5-mm pedicle screw followed by the removal and reinsertion of a 5.5-mm screw after control; Group 4, inserted with a 5.5-mm pedicle screw; and Group 5, inserted with a 5.5-mm pedicle screw followed by the removal and reinsertion of the same screw after control. Pedicle screws were inserted into the right pedicles, and axial pullout testing was performed at 5 mm/min. All data were recorded. A load-displacement curve was used to obtain the peak value of the pullout strength for all specimens.RESULTS:
The mean pullout strengths were 1086.22 N, 1043.32 N, 1039.18, 1199.10, and 1131.68 N for Groups 1?5, respectively. No significant difference was observed among all groups (p > 0.05).CONCLUSION:
Perioperative reinsertion of the same screw or (0.5 mm) larger in diameter through the same trajectory after the control of the screw trajectory did not affect the pullout strength of the screw.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Parafusos Pediculares
Limite:
Animals
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article