Observational Study
Copyright ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Orthop. May 18, 2021; 12(5): 310-319
Published online May 18, 2021. doi: 10.5312/wjo.v12.i5.310
Potential contribution of pedicle screw design to loosening rate in patients with degenerative diseases of the lumbar spine: An observational study
Andrey Bokov, Svetlana Pavlova, Anatoliy Bulkin, Alexandr Aleynik, Sergey Mlyavykh
Andrey Bokov, Svetlana Pavlova, Anatoliy Bulkin, Alexandr Aleynik, Sergey Mlyavykh, Department of Oncology and Neurosurgery, Federal State Budgetary Educational Institution of Higher Education “Privolzhsky Research Medical University” of the Ministry of Health of the Russian Federation, Nizhniy Novgorod 603000, Russia
Author contributions: Bokov A and Mlyavykh S finished study design, data mining, statistical analysis; Mlyavykh S finished manuscript editing; Pavlova S, Bulkin A and Aleynik A finished data collection, data mining; Bulkin A finished preparation of manuscript.
Institutional review board statement: The study was reviewed and approved by the Privolzhskiy Medical Research University Institutional Review Board, web: https://pimunn.ru/dissertation#rec62878046.
Informed consent statement: All study participants, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: The authors declare that they have no competing interests.
Data sharing statement: No additional data are available.
STROBE statement: The authors have read the STROBE Statement—checklist of items, and the manuscript was prepared and revised according to the STROBE Statement—checklist of items.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Andrey Bokov, PhD, Senior Researcher, Department of Oncology and Neurosurgery, Federal State Budgetary Educational Institution of Higher Education “Privolzhsky Research Medical University” of the Ministry of Health of the Russian Federation, 603000, Russia. andrei_bokov@mail.ru
Received: January 10, 2021
Peer-review started: January 10, 2021
First decision: February 15, 2021
Revised: February 15, 2021
Accepted: March 28, 2021
Article in press: March 28, 2021
Published online: May 18, 2021
Core Tip

Core Tip: The published data on the contribution of pedicle screw design to pedicle screw stability remain controversial. According to the study results, the influence of screw parameters was comparable to that of patient- and surgery-related factors. The rate of pedicle screw loosening was influenced by helical pitch, inner, and outer diameter, but the influence of screw geometry and thread type was not significant.