Is motor-driven insertion of orthodontic miniscrews more advantageous than manual insertion? A micro-CT evaluation of bone miniscrew contact surface area and cortical microcracks in rabbits.

Autor: Alansari RA; Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Zawawi KH; Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Vaiid N; Faculty of Dentistry, National University of Singapore, Singapore, Singapore.; Department of Orthodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India., Natto Z; Department of Dental Public Health, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Adel SM; Department of Orthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt., Alshihri MR; Department of Pedodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Alsadat M; University Dental Hospital, King Abdulaziz University, Jeddah, Saudi Arabia., Dause R; Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Agou S; Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Hassan AH; Faculty of Dentistry, National University of Singapore, Singapore, Singapore.
Jazyk: angličtina
Zdroj: Orthodontics & craniofacial research [Orthod Craniofac Res] 2024 Dec; Vol. 27 (6), pp. 853-859. Date of Electronic Publication: 2024 Jun 16.
DOI: 10.1111/ocr.12824
Abstrakt: Aim: This in vitro study aimed to evaluate and compare the bone-miniscrew contact surface area (BMC) and the cortical bone microcracks (CM) resulting from manual (hand-driven) and automated (motor-driven) orthodontic miniscrew (OM) insertion methods.
Methods: Thirty-three OM were inserted in the femurs of nine New Zealand rabbits using manual (n = 16) and automated (n = 17) insertions. After euthanizing the rabbits, bone blocks, each including one OM, were sawed. Micro-CT scanning was performed, and data analysis included reconstruction, binarization and quantification of morphometric parameters of BMC and the number and length of CM. Means and standard deviations for complete BMC, complete BMC proportion, cortical BMC, cortical BMC proportion, and length and number of CM were calculated. Mixed model analysis was used to adjust for more than one sample/CM per animal. A paired t-test was used to compare the number of CM between the two groups.
Results: Compared to the automated insertion, manually inserted miniscrews had significantly lower complete BMC (7.54 ± 1.80 mm 2 vs. 11.99 ± 3.64 mm 2 ), cortical BMC (5.91 ± 1.48 mm 2 vs. 8.48 ± 1.90 mm 2 ) and cortical BMC proportion (79.44 ± 5.84% vs. 87.94 ± 3.66%). However, it was not statistically significant in complete BMC proportion (p = .052). The automated insertion also resulted in a significantly lower mean number of CM than the manual method (p = .012). However, the length of the cracks was shorter in the manual group but with no significant difference (p = 0.256).
Conclusion: Motor-driven OM insertion results in superior BMC and reduction in the number of CM, which may lead to better miniscrew stability.
(© 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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