Arthrodesis is a reliable alternative to conservative treatments in handling intractable arthritic pain and joint deformity. Temporary Kirschner wire are a widely adopted solution to perform arthrodesis, however they do not provide compression in the joint and do not control the phalanx rotation, with associated risk of infection, breakage, migration, and discomfort for the patient. To overcome these limitations, permanent intramedullary interphalangeal Nitinol implants (IINIs) have been recently developed. These innovative devices exploit the shape memory effect and superelasticity of Nitinol to change their shape once implanted in the body in order to anchor to the bone and provide compression at the arthrodesis site.