Artoss Foot and Ankle Surgery Registry

Inclusion Criteria: * Patient aged 18 years or older. * Patient is or was diagnosed with a pathology of the foot or ankle, having failed conservative treatment, and surgeon has determined that surgery with bone graft is medically necessary. * The surgeon has determined that NanoBone is or was clinically indicated. * NanoBone will be or was used as a stand-alone bone graft (no autograft, other bone graft substitute, or biologic planned or used). * Patient capable of understanding the content of the Informed Consent Form * Patient willing and able to participate in the registry protocol including the surgeon's standard follow-up visits and clinical evaluations. * Patient who has agreed to participate in the registry by providing consent according to the applicable local law and the declaration of Helsinki. Exclusion Criteria: * Severe vascular or neurological disease * Uncontrolled diabetes * Severe degenerative disease (other than degenerative disc disease) * Severely impaired renal function * Hypercalcemia, abnormal calcium metabolism * Existing acute or chronic infections, especially at the site of the operation * Inflammatory bone disease such as osteomyelitis * Malignant tumors * Patients who are or plan to become pregnant. * Uncooperative patients who cannot or will not follow post-operative instruction, including individuals who abuse drugs and/or alcohol.