In denture fabrication, the impression techniques and materials used vary depending on the condition of the oral cavity and the dentist's perspective on impression making. Impression techniques must adhere to biologic principles, objectives and theories dictated by the anatomic and the physiology of the oral structures. The technique and materials used for denture impression are debatable. There was an agreement all over the past decades that no impression material was an answer to all our denture problems, as any material could be of value if it was skillfully and intelligently employed.