Trinity Evolution provides the required osteoconduction, osteogenesis, and osteoinductivity necessary for successful bone grafting. It offers viable osteoprogenitor and mesenchymal stem cells and demineralized cortical bone—all in a single product. Data from preclinical studies with Trinity Evolution have demonstrated in-vitro and in-vivo safety and effectiveness. Trinity Evolution is a "minimally manipulated" tissue that is considered an allograft, and as such, is labeled for bone repair for all orthopedic and podiatric indications where autograft is used. In this study, Trinity Evolution will be used as a substitute for autograft and/or standard allograft in the following arthrodesis procedures: tibiotalar, subtalar, calcaneocuboid, talonavicular, double fusions (i.e. calcaneocuboid and talonavicular), and triple fusions (i.e. subtalar, calcaneocuboid, and talonavicular).