Columna Capital, an investment firm, completed the acquisition of Ardentis, the group of dental clinics in western Switzerland. Financial terms were not disclosed. "With its experience in developing leading businesses in the healthcare sector, Columna will actively support the founders in the next phase of growth of the Ardentis Group. Columna is committed to building on the strong dentist and patient-centric culture established by the Ardentis founders in the future," Columna Capital.