Study on Basal Joint Arthritis Prospective

Inclusion Criteria: * Patients who have symptomatic basal joint arthritis. * Patients who are capable of providing informed consent. Exclusion Criteria: * Patients younger than 18 years old at the time of enrollment. * Patients with neuromuscular disease affecting the operated hand, not caused by the CMC operation. * Patients with known inflammatory arthritic conditions, such as rheumatoid or psoriatic arthritis. * Patients with a history of or current infection of the basal joint of the affected hand. * Patients who are demented or are unable to provide informed consent. * Patients unable to comply with study guidelines. * Patients who have metacarpophalangeal joint hyperextension are NOT excluded. These patients will be followed and if they receive a capsulodesis or other procedure at the MCPJ at the same time as their basal joint arthroplasty this will be noted in their data records.