The cost of the lower denture will vary between $600 to $800 depending upon the place and the dentist. No, if there are multiple cracks then the denture can not be repaired. You have to get the new denture made. The cost of the lower denture will vary between $600 to $800 depending upon the place and the dentist. No, if there are multiple cracks then the denture can not be repaired. You have to get the new denture made.