When dentists fabricate immediate dentures, there are some assumptions on where the healing gums and bone from the extraction sites will eventually stabilize. The more teeth to be extracted, the more assumptions need to be made. Therefore, it is common that the dentures do not fit "perfectly" right away and often they will need to be adjusted periodically until full healing has occurred (6 months). It is best to stage the extractions in order to minimize this transitional period.
Many people find the adjustment of going from teeth to dentures difficult. The use of implants to support the dentures dramatically increases the support and chewing efficiency of dentures, offers the patient confidence that the teeth will not "fall out" during social situations, and also will minimize any discomfort associated with the dentures. Implants also have the added benefit of helping to maintain jaw bone.