A comparative clinical trial for evaluating the posterior palatal seal developed from the conventional method and a novel functional swallow method.

Aims: The aim of this in vivo study was to compare the influence of posterior palatal seal (PPS) developed from the conventional method and a novel functional swallow method on the retention of custom tray and heat cure denture base.

Settings And Design: This was a nonrandomized crossover clinical trial.

Materials And Methods: Twenty patients requiring maxillary complete dentures were selected.