Surface of a denture:1. Tissue to face- exactly same in impression2. Surface facing tongue- should be very smooth and polishedPatient complaints of the ulcer within 1 or 2 days of deliveryirregularity indentureindenture treatment correct and polishPatient 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 hoursconditioning of the tissue surface Either change the denture or reline or rebasingOVERDENTURE 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 molarsIMPLANT SUPPORTED DENTUREmaxillary minimum- 4, optimum- 6mandibular minimum- 2, optimum

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