Biomedical Structures, an Ampersand Capital Partners portfolio company that develops biomedical textiles for medical devices and other clinical applications, has merged with Modified Polymer Components. MPC, also backed by Ampersand, specializes in the design, rapid prototyping and manufacture of polymer components for medical device OEMs. Ampersand will be the majority shareholder of the combined company. Ampersand invested in Biomedical in 2010, and MPC has been in the firm's stable since 2011. The merged entity will combine their joint capabilities and serve a wider variety of customer needs related to custom plastics components and medical textiles.