Background and objectives: To compare the medium- to long-term mechanical behavior of overdentures with two different retention systems: overdentures with Locator® axial retention. and vertical insertion overdentures with bar retention. used to rehabilitate edentulous maxillar. Material and Methods: This prospective study assessed patients presenting complete maxillary edentulism. https://countryscenesaddleryandpetsuppliers.shop/product-category/14oz-double-ripstop/