Titanium posts (implants) are inserted into the jaw, where the bone will heal around them. After the implants have healed, your denture is modified to snap onto the implant abutment. The denture will be secure but may be removed for cleaning with a simple "snap".
anatomy of overdentures
(modified for implants)
titanium alloy implant, the same material used in joint replacement
implant surface promotes bone growth around implant