The retention of a complete denture is directly related to the adaptation of the base to the supporting oral tissues. When processing a denture for a patient with deep palate, care should be taken that the post palatal seal in the midline is adequate. In a patient with shallow palate, an adequate bead of relief is required across the posterior border from ridge to ridge, because the pattern of gap is wider.Knowing the palatal adaptation at various areas directs us to take appropriate steps while fabrication of the accurate denture bases.