Lower Suction Dentures or SEMCD are an advanced denture construction technique developed in Japan by Professor Jiro Abe by mapping the sealing mechanism of the lower jaw then developing a method to record this seal. With lower suction dentures, maintaining suction on a complete lower denture is now possible. This latest clinical method can provide a cost-effective solution to the loose unstable lower denture, which has been offered by dentistry as a solution for missing lower teeth for over a century.