Augment® Injectable Bone Graft Compared to Autologous Bone Graft as a Bone Regeneration Device in Hindfoot Fusions

KEY INCLUSION CRITERIA: * at least 18 years old and considered skeletally mature * diagnosed with degenerative joint disease (DJD) affecting the hindfoot due to a congenital or acquired deformity, osteoarthritis, rheumatoid arthritis, post- traumatic arthritis or ankylosing spondylitis of the ankle, subtalar, calcaneocuboid, and/or talonavicular joints * requires one of the following hindfoot fusion proceduress with supplemental bone graft/substitute: ankle fusion (tibiotalar), subtalar fusion (talocalcaneal), calcaneocuboid fusion, talonavicular fusion, triple arthrodesis (subtalar, talonavicular and calcaneocuboid joints) OR double fusions (any combination of any two of the following: subtalar, talonavicular and calcaneocuboid joints) * fusion site able to be rigidly stabilized with no more than 3 screws across the fusion site * supplemental pins or staples allowed * supplemental screws external to the fusion site(s) allowed * signed informed consent document, independent, ambulatory, and can comply with all post-operative evaluations and visits KEY EXCLUSION CRITERIA: * undergone previous fusion surgery at the proposed location, i.e., revision of a failed fusion * more than one previous procedure at the involved joints * retained hardware spanning the joint(s) intended for fusion * procedure anticipated to require plate fixation (including claw plates), IM nails or more than 3 screws to achieve rigid fixation based on pre-op planning * procedure expected to require…