Post Market Clinical Follow-Up KeriFlex®

Inclusion Criteria:

• Adult patients (age ≥ 18 years)

• Patients who are going to undergo arthroplasty of the metacarpophalangeal orproximal interphalangeal joint using a KeriFlex® implant in accordance with theinstructions for use and the labelling in force.

• Patients with rheumatoid arthritis, osteoarthritis or post-traumatic osteoarthritis

Exclusion Criteria:

• Pregnant or breastfeeding women

• Patients with an intellectual disability who cannot follow their surgeon'sinstructions

• Patients with general surgery contraindications and particularly to the implantationof a KeriFlex® implant

• Patients with acute or chronic, local or systemic infections

• Metacarpal or phalanx destruction or poor bone quality preventing adequate fixation

• Muscle loss, alteration or vascular deficiency in the affected finger

• Patients with significant physical activity involving treated joint

• Children, young growing patients with open epiphyses