Abstract
This study evaluated, by mechanical testing, the strength of four-hole grid plates
used for mandibular angle fracture fixation. Much has been discussed about the treatment
of mandibular fractures with straight or curved plates. However, there are few studies
about the use of grid plates. The geometry of such plates provides three-dimensional
stability, resistance against torque associated with a low profile. Ninety polyurethane
hemimandibles were used as substratum. The hemimandibles were divided into nine groups
and fixation of the fractures was performed varying the type and position of plate
and type of screw. An intact hemimandible group was used as control. It was possible
to observe that plates positioned at the tension zone present the highest load values,
both for dislocations of 3 and 5 mm. There was no statistical difference when plates
with or without an intermediate bar were tested. The locking screws were more efficient
than the non-locking screws when the plates were positioned at the neutral zone. Results
allowed us to conclude that grid plates installed at the tension zone presented greater
mechanical efficiency. If grid plates are positioned at the neutral zone, they should
have an intermediate bar and be fixed with locking screws.
Keywords
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Article Info
Publication History
Published online: May 25, 2022
Accepted:
May 17,
2022
Received:
February 18,
2022
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2022 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
