It is very important to obtain a well fitting denture base when making a full denture for the edentulous patient. The denture base is stable in the mouth when it has a tight marginal seal. It is therefore important that we dentists possess the knowledge and technique for taking good impressions.
In order to accomplish a good marginal seal, the margin of the denture base must have a functional form and be in harmony with movements of the perioral muscles. The most important thing is that we are able to take the correct functional impression when these muscles are properly functioning.
I feel that it is poissible to easily obtain a correct functional impression if a treatment provisional denture is fabricated and adjusted with the appropriate vertical dimension of occlusion, proper positioning of the artifcial teeth, and correct occlusal contact during lateral excursions.
