Study of Subtalar Arthrodesis Using AlloStem® Versus Autologous Bone Graft

Inclusion criteria

• Must be diagnosed with degenerative osteoarthritis, post-traumatic arthritis, inflammatory arthritis (ie: rheumatoid arthritis) or other conditions of the hindfoot requiring subtalar arthrodesis.
• Patients must be able to attend follow-up examinations for the duration of the trial.
• The patient is at least 18 years of age and skeletally mature, or less than 80 years of age at the time of surgery.
• Is willing and able to comply with the clinical trial plan and able to understand and sign the Patient Informed Consent Form.

Exclusion criteria

• Younger than 18 years old or older than 80 years old.
• Has a condition that prevents ambulation or completion of any of the trial measurements.
• Requires fusion of additional hindfoot or ankle joints simultaneously (i.e. a pantalar, tibiotalocalcaneal or triple arthrodesis). Concomitant midfoot or forefoot procedures, such as osteotomies, tendon or metatarsal procedures are not exclusionary.
• Has treatment planned for the arthrodesis which does not require the use of screws.
• Has any active infection of the hindfoot, a systemic infection or bacteremia.
• Has received any treatment within the past 12 months which may interfere with bone metabolism [bisphosphonates (Fosamax, Actonel, Boniva, Reclast) and calcitonin (Miacalcin)].
• Is scheduled to have any surgical procedure on the contralateral foot within 6 weeks before or after the study procedure.