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Journals / Acta Orthopaedica et Traumatologica Turcica / 2018 / Cilt: 52 - Sayı: 6

Quantitative comparison of a laterally misplaced pedicle screw with a re-directed screw. How much pull-out strength is lost?

Murat KORKMAZC
Kerim SARIYILMAZ
Okan OZKUNTA
HALİL CAN GEMALMAZ
TURGUT AKGÜL
Mustafa SUNGUR
FATİH DİKİCİ
MURAT BAYDOĞAN
Pages
459–463
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Conclusion: The results of this study confirm that pullout strength of pedicle screw decreases by approximately 71% when the lateral wall is perforated and decreases 28% after redirection to the accurate position

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: Redirecting of a laterally misplaced pedicle screw into the accurate position decreases the pull-out strength due to the reinsertion, lateral wall cortical perforation and widening of the pedicle hole.
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Key Findings & Data:Thus, this biomechanical study was performed to quantitatively analyze the pullout strength of a redirected laterally misplaced pedicle screw into the accurate position.
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Conclusion & Impact:Conclusion: The results of this study confirm that pullout strength of pedicle screw decreases by approximately 71% when the lateral wall is perforated and decreases 28% after redirection to the accurate position
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Özet

Objective: Redirecting of a laterally misplaced pedicle screw into the accurate position decreases the pull-out strength due to the reinsertion, lateral wall cortical perforation and widening of the pedicle hole. Thus, this biomechanical study was performed to quantitatively analyze the pullout strength of a redirected laterally misplaced pedicle screw into the accurate position. Methods: Thirty pedicules of 15 bovine vertebrae were separated to 3 groups, according to the screw placement method: 1) standard flawless trajectory; 2) trajectory with lateral pedicle wall perforation; 3) trajectory with lateral wall perforation redirected to the standard trajectory. Samples were placed on a universal testing machine and pullout loads were measured. Kruskal-Wallis test was utilized within 95% confidence interval and p value 0.05). Conclusion: The results of this study confirm that pullout strength of pedicle screw decreases by approximately 71% when the lateral wall is perforated and decreases 28% after redirection to the accurate position

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Cite This Article

KORKMAZC, M., SARIYILMAZ, K., OZKUNTA, O., GEMALMAZ, H. C., AKGÜL, T., SUNGUR, M., DİKİCİ, F., BAYDOĞAN, M. (2018). Quantitative comparison of a laterally misplaced pedicle screw with a re-directed screw. How much pull-out strength is lost?. Acta Orthopaedica et Traumatologica Turcica, Cilt: 52 - Sayı: 6, 459–463. https://ajindex.com/articles/159689

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