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Medical & Biological Engineering & Computing

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03-08-2023 | Original Article

Biomechanical analysis of a novel screw system with a variable locking angle in mandible angle fractures

Authors: Petra Adamović, Lovro Matoc, Predrag Knežević, Srećko Sabalić, Janoš Kodvanj

Published in: Medical & Biological Engineering & Computing | Issue 11/2023

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Abstract

Locking plates nowadays represent an important treatment in bone trauma and bone healing due to its strong biomechanical properties. The purpose of this study was to both computationally and experimentally validate a novel screw locking system by comparing it to another locking system from state-of-the-art and to apply it in an environment of a fractured mandible. FEA was used to test both systems prior to experimental tests. The systems were locked in the plate holes at 0°, 10°, 15°, and 20°. Cyclic bending tests and push-out tests were performed in order to determine the stiffness and push-out forces of both locking systems. Finally, newly designed locking system was implemented in mandibular angle fracture. Control locking system was biomechanically superior in push-out test, but with no greater significance. In contrast, the new locking system showed greater stiffness by 17.3% at the deflection angle of 20° in cyclic tests, with lower values for other deflection angles. Similar values were displayed in fractured mandible angle environment. Greater stiffness of the new locking system in cyclic loading tests, together with polyaxiallity of the new locking screw, could lead to easier application and improved biomechanical stability of the mandible angle fractures.

Graphical abstract

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Title: Biomechanical analysis of a novel screw system with a variable locking angle in mandible angle fractures
Authors: Petra Adamović
Lovro Matoc
Predrag Knežević
Srećko Sabalić
Janoš Kodvanj
Publication date: 03-08-2023
Publisher: Springer Berlin Heidelberg
Published in: Medical & Biological Engineering & Computing / Issue 11/2023
Print ISSN: 0140-0118
Electronic ISSN: 1741-0444
DOI: https://doi.org/10.1007/s11517-023-02895-y

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