Use of FlexHD as Post Trapeziectomy Spacer

Inclusion Criteria: * Male or Female \>18 years of age * Be willing to undergo thumb basilar joint arthroplasty with the use of acellular dermal matrix * Basilar Joint Arthritis Eaton Stage III or IV * Be in good health other than the arthritis * Have realistic expectations of surgical results * Understand and be willing to follow all aspects of the study protocol and have signed and dated the IRB-approved Informed Consent Form and the Authorization for Use and Release of Health and Research Study Information (HIPAA) form prior to any study-related procedures being performed Exclusion Criteria: * Have collagen-vascular, connective tissue, or bleeding disorders * Be a smoker or have smoked in last 2 months * Have any disease, including uncontrolled diabetes, which is clinically known to impact wound healing ability * Have regional sympathetic dystrophy * Be pregnant, lactating or expecting to be within the next 24 months