Endoprosthetics of the head of the talus for deforming arthrosis of the talonavicular joint

INTRODUCTION: Idiopathic osteoarthritis of the rearfoot joints most commonly affects the talonavicular joint. Currently, talonavicular osteoarthritis is commonly treated using double and triple arthrodesis, as well as isolated talonavicular arthrodesis. However, restricting functionally significant joints of the foot results in increased load on adjacent joints, causing degenerative changes. CLINICAL CASE DESCRIPTION: The paper presents a clinical case of surgical treatment in a patient with avascular necrosis of the talar head, deforming arthrosis, and fibrous ankylosis of the talonavicular joint by talar head replacement with an original ceramic implant. The presented case is the first to describe a novel treatment method for gross talonavicular joint pathology using a ceramic implant to replace the talar head. CONCLUSION: Based on the medium-term outcomes of surgical treatment in a patient with stage III deforming arthrosis and fibrous ankylosis of the talonavicular joint, talar head replacement is a promising treatment option for this condition. The initial findings showed that the proposed implant and its placement method can be used as an option of choice to preserve the mobility of the talonavicular joint. © 2025 Elsevier B.V., All rights reserved.