Dual-mobility (DM) implants have been used in total hip arthroplasty since 1974. Modular DM implants have seen an increase in use in primary and revision total hip arthroplasties given the theoretical decreased dislocation rate. DM constructs have 2 articulation sites. one between the acetabular shell and a polyethylene liner. https://www.driverstorage.com/product-category/kemper-profiles/