1- If a good denture exists, is it sufficient to cut out tissue surface base over the location of proposed implants, leaving a space so as not to micro-move the implants during osseous fixation? (Patient went through extensive fixed prosthetics, endo and perio on lower and is not 'eager' for more treatment but would like more stability.) What is the minimum one can use presuming adequate (10+mm x4mm), strong, healthy bone? I would like to cut back the palatal coverage when implants are secure. For her less treatment is better treatment.