Surface of a denture:
1. Tissue to face- exactly same in impression
2. Surface facing tongue- should be very smooth and polished

Patient complaints of the ulcer within 1 or 2 days of delivery
irregularity indenture
indenture treatment correct and polish

Patient complaints of ulcer after 2 or 3 years of post-insertion
 Due to ResidualRidge resorption
 Treatment - educate the patient not to wear the denture for or next 48 hours
conditioning of the tissue surface
 Either change the denture or reline or rebasing

OVERDENTURE
 Main advantage- no Ridge resorption
 the second advantage- proprioceptive reception
 increase to stability
 easy to repair
 Disadvantage - long term retention of denture uh is poor
 most preferred canine
 secondary molars

IMPLANT SUPPORTED DENTURE
maxillary minimum- 4, optimum- 6
mandibular minimum- 2, optimum