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. 2024 Sep;27(12):1587-1595.
doi: 10.1080/10255842.2023.2252549. Epub 2023 Aug 30.

Stress distribution for mandibular extra-alveolar anchorage at different angles and force magnitudes: a finite element study

E V Arango-Piloneta  1 , S P Plaza-Ruiz  1 , D F León-Lara  2 , M Munera  3 , B Bedoya-Henao  4 , T Martínez-Gallego  4
Affiliations

Stress distribution for mandibular extra-alveolar anchorage at different angles and force magnitudes: a finite element study

E V Arango-Piloneta et al. Comput Methods Biomech Biomed Engin. 2024 Sep.

Abstract

The aim of this study was to evaluate the stress distribution in cortical and cancellous bones and within the screw when a stainless steel extra-alveolar screw (EA-S) is inserted into the retromolar region of the mandible using the finite element method (FEM). The stress values in the EA-S were highest at 60° with horizontal (shear) force and lowest at 90° with axial force. In the bones (cortical and cancellous), the stress value was greatest at 90° with horizontal force. Greater stability of the screw may be achieved by tilting it to the force when horizontal loads are applied.

Keywords: Bone screws; biomechanics; orthodontics; stainless steel.

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