Can maxilla and mandible bone quality explain differences in orthodontic mini-implant failures?
Omar Melendres Ugarte, Ivan Onone Gialain, Naor Maldonado de Carvalho, Gisele Lie Fukuoka, Rafael Yague Ballester, Paolo Maria Cattaneo, Marina Guimarães Roscoe, Josete Barbosa Cruz Meira
Biomater Investig Dent | Published : 2021
Purpose: This study aimed to compare the risk of orthodontic mini-implant (OMI) failure between maxilla and mandible. A critical analysis of finite-element studies was used to explain the contradiction of the greatest clinical success for OMIs placed in the maxilla, despite the higher quality bone of mandible. Materials and Methods: Four tridimensional FE models were built, simulating an OMI inserted in a low-dense maxilla, control maxilla, control mandible, and high-dense mandible. A horizontal force was applied to simulate an anterior retraction of 2 N (clinical scenario) and 10 N (overloading condition). The intra-bone OMI displacement and the major principal bone strains were used to eva..View full abstract