Universität zu Köln

Grevenstein, David, Meyer, Carolin, Wegmann, Kilian, Hackl, Michael, Bredow, Jan, Eysel, Peer, Prescher, Andreas and Scheyerer, Max J. (2019). First results of multicortical screw anchoring compared with conventional bicortical screw placement in the sacrum: A biomechanical investigation of a new screw design. Clin. Biomech., 65. S. 100 - 105. OXFORD: ELSEVIER SCI LTD. ISSN 1879-1271

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Abstract

Background: Bicortical screw fixation is an established technique to increase screw strength in vertebral bodies, although it is associated with several complications, for example screw-loosening. Cement augmentation can increase stability of screw-fixation but can also cause various complications, such as cement-leakage or cement embolism. In this study, we tested a new, multicortical screw fixation technique in the sacrum. Methods: Four fresh-frozen sacrums were used. In group 1, standard screw insertion, with sagittal parallel and axial convergent screw-drive was performed. In group 2, the screw-drive of the first screw was similar to the screw-drive in group 1. In addition, a second screw was inserted descending into the intended hole in the head of the screw and at a stable angle. Therefore, the screws of the multiloc humerus nail-system (Synthes) were used. The specimens were connected to a testing-machine and underwent cyclic axial loading with an increase in the load after each completed stage. Findings: Multicortical screw fixation leads to a significant increase in the number of completed cycles and a significantly increased load until failure. Interpretation: Multicortical screw fixation in the sacrum offers a stronger attachment of the screws. In the future, multicortical implants, which fulfil the criteria demanded in spine surgery, can offer higher stability and may decrease the loosening rates of the implanted screws.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Grevenstein, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Meyer, Carolin UNSPECIFIED UNSPECIFIED UNSPECIFIED Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Hackl, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Bredow, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Eysel, Peer UNSPECIFIED UNSPECIFIED UNSPECIFIED Prescher, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Scheyerer, Max J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-149111
DOI:	10.1016/j.clinbiomech.2019.04.007
Journal or Publication Title:	Clin. Biomech.
Volume:	65
Page Range:	S. 100 - 105
Date:	2019
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1879-1271
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PEDICLE SCREWS; FIXATION; BONE; MANAGEMENT; REVISION Multiple languages Engineering, Biomedical; Orthopedics; Sport Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14911