Definition A patient-specific custom 3D–printed porous titanium implant for subtalar joint fusion to restore height, length, and alignment of the hindfoot. Indications Calcaneus malunion/nonunion Subtalar fusion malunion. Anatomy and pathogenesis The subtalar joint is comprised of the talocalcaneal joint and…
Definition Tibiotalocalcaneal (TTC) fusion is a salvage procedure for patients with substantial ankle and subtalar arthritis or severe malalignment of the ankle-hindfoot complex. In many cases, this procedure is the only option available to provide patients with a stable, painless,…
Definition Excision of the talus and navicular in total, which is then replaced with a metallic, patient-customized 3D-printed implant. Indications Avascular necrosis (AVN) of the talus and/or the navicular. Comminuted fracture of talus and navicular. Post-traumatic arthritis with poor bone…
Definition The utilization of 3D printing technology for combined total talus and navicular replacement with incorporation of subtalar joint fusion and total ankle replacement. Indications Talar avascular necrosis Aseptic talar body collapse Failure of total ankle arthroplasty with talar subsidence/collapse…
Definition Surgical treatment of end-stage ankle arthritis with concomitant avascular necrosis (AVN) of the talus utilizing a combination of patient-specific 3D-printed and off-the-shelf (OTS) components for joint preservation and restoration of function. 3D printing has evolved and now allows surgeons…
Definition Resection of damaged cartilage and subchondral bone in the talus which is then replaced with a metallic, patient-specific, 3D-printed implant without the need for malleolar osteotomy. Indication(s) Chronic, medium-to-large osteochondral defects (OCDs) of the talar dome which are often…
Definition Patient-specific 3D custom-printed metallic constrained total talus replacement includes modifications to implant design and technique in order to incorporate subtalar arthrodesis. Anatomy The talus, through its articulations, is the link between foot and ankle motion. The talus is covered…
Definition Total talus replacement (TTR) is a surgical procedure which involves the removal of a pathologic talus and replacement with a patient-specific 3D-printed titanium (Ti) prosthesis coated with titanium nitride (TiN). DICOM data from a CT scan is used with…
Definition Excision and replacement of the talus with a patient-specific 3D-printed metallic implant in patients without adjacent joint disease. Indications Avascular necrosis (AVN) of the talus without significant arthritic changes ( Fig. 4.1 ). Complex talus trauma ( Fig. 4.2…
Introduction Materials science and 3D printing As discussed in Chapter 1 , materials for 3D printing include polymers, ceramics, metals, and composites. The materials used to fabricate a 3D part are dependent on the performance, or the “requirements” of the…