Complete dentures made of flexible materials, especially the mandibular ones, have special qualities, such as: flexibility, high fidelity, good chemical and physical properties, translucency and comfort. Thus, this material tries to describe as briefly as possible the essential technological stages of obtaining complete mandibular dentures made of a flexible material. Also, the present material tries to highlight the role of the dental technician in the design and realization of these types of prosthetic restorations.