The construction of a full denture starts with an impression of the gums. The dentist must first check to see if there are any suspicious lesions that could be a malignancy. X-rays should be taken to make certain that there are no tumors inside the bone. The dentist must also make certain that there are no bony undercuts which would prevent the denture from properly seating or flabby gum ridges which would not provide a stable surface for the denture to function. Any of these problems would require surgical intervention plus a healing period before final impressions could be made. The dentist must also check the condition of the gum tissue itself.

Maxillary (upper) gum tissue

If the gums are swollen, red, and inflamed especially due to sleeping in the dentures or from smoking, then steps must be taken to relieve the inflammation. Many times, merely leaving the dentures out while sleeping for a week or two will allow the gums to heal. In more resistant cases, a tissue conditioner can be applied to the current denture. This conditioner is a resilient liner. Its soft nature can give the gums a chance to heal. Once all of the preliminary steps have been taken, the final impression can be made.