Evaluate the Continued Safety and Performance of the Foot and Ankle Products

Eligibility Criteria

• 1. Subject requires surgery using Arthrex foot and ankle products included in the registry.
• 2. Subject is 18 years of age or over (all products except ProStop®).
• 3. Subject age \>two to 17 years (ProStop® product only).
• 4. Capable of completing self-administered questionnaires.
• 5. Willing and able to return for all study-related follow-up visits.
• 6. Subject or subject's representative signed informed consent and assent, when applicable, and is willing and able to comply with all study requirements.
• 7. Degenerative or post-traumatic arthritis of the 1st MTP joint with grade 2, 3, or 4.
• 8. Subjects who require surgical intervention or are medically indicated for an arthrodesis or arthroplasty of the 1st MTP.
• 9. The participant must have instability, arthritis, rigid deformity, or severe foot or ankle deformity necessitating tibiotalocalcaneal arthrodesis, commonly referred to as TTC arthrodesis.
• 10. The participant should be undergoing treatment with the Arthrex DualCompression Hindfoot Nail, either as a primary procedure or as a revision surgery, per standard of care
• 1. Insufficient quantity or quality of bone.
• 2. Blood supply limitations and previous infections, which may retard healing.
• 3. Foreign-body sensitivity.
• 4. Any active infection or blood supply limitations.
• 5. Conditions that tend to limit the patient's ability or willingness to restrict activities or follow directions during the healing period.
• 6. Subjects that are skeletally immature (except for ProStop®).
• 7. Subject is considered from vulnerable population (i.e., child, prisoner, pregnant).
• 8. Subjects who are contraindicated for these devices.
• 9. Subject is currently receiving compensation or benefits due to a work-related injury or illness under any applicable occupational injury or disability program.
• 10. Subject has a planned or scheduled additional surgery on the affected or contralateral lower extremity within the course of the study.
• 11. Subjects who have a comminuted bone surface that would not allow for staple placement as required by the DynaNite® Nitinol Staples directions for use.
• 12. Subjects who have pathologic bone conditions such as osteopenia that would impair the ability to securely fix the implant as required by the DynaNite® Nitinol Staples directions for use.
• 13. Additional ipsilateral lower limb pathology that requires active treatment.
• 14. Bilateral degenerative or post-traumatic arthritis of the 1st MTP joints that would require simultaneous treatment of both MTP joints.
• 15. Diagnosis of gout.
• 16. Any significant bone loss, avascular necrosis, and/or large osteochondral cyst (\>1cm) of the 1st MTP joint.
• 17. Lesions greater than 10mm in size.
• 18. Hallux varus to any degree, or hallux valgus \>20 degrees.
• 19. Requiring only a tibiotalar or subtalar arthrodesis
• 20. Patient requires bulk allograft or metal spacer implant to fill large bony defect and aid in limb salvage