Most dental clinics that do implants would be able to facilitate an implant retained denture.
As Dr JD has explained, cost of total treatment depends on how easy or difficult the implant placement would be in the lower jaw.
For the implant surgery portion - this is claimable by medisave. The medisave account used can either be patient's personal account, of account of family member. Usually claimable amount is $950 per implant, and if there is a top up it is subject to the treating dentist to determine because if bone particles need to be grafted in, then there would be an additional cost incurred.
For the denture portion - this can be subsidized by CHAS blue or orange or PG cards if the patient has one of the 3. The amount of subsidy is varied in accordance to the type of card you have.
Hope this additional information helps!
Warm regards,
Dr Beth