 Hand osteoarthritis is a frequent condition in the middle-aged and elderly population with a prevalence of up to 76. After the distal interphalangeal joints, the trapeziometacarpal joints are the most affected joints of the hand. Symptoms such as pain, stiffness, deformity, loss of grip strength, as well as reduction of joint mobility, are affecting the overall hand function and patients quality of life. Numerous studies have evaluated different surgical and conservative interventions for treating patients with trapeziometacarpal osteoarthritis TMC OA with both interventions found to be effective in reducing pain and increasing function. To date, there is only little evidence about the characteristics and outcomes of patients who receive a conservative or a surgical treatment for TMC OA. The analysis should focus on which factors contribute to either a conservative or a surgical treatment, and if these patients differ regarding personal or health-related factors. Furthermore, no data about the economic consequences of a resection interposition suspension arthroplasty are available which highlights the need for a financial analysis of this procedure with respect to the benefit for the patient and cost bearers. 