It may be possible to go back to old-style dentures but talk to the dentist to find out just how stable these dentures will be. Dental implants make it easy to eat a good, nutritious diet that could help your father to maintain good health. This might not be so easy if he were to return to conventional dentures. I’d also talk to the implant dentists to find out more about the surgery they’d suggest. Surgical techniques could well have changed considerably since your father’s original implants were fitted and surgery and recovery could be more comfortable and faster depending on the technique used.