With a regular sized dental implant, there needs to be a certain amount of bone structure available to place the implant. With mini implants, less space is needed, allowing the use of a site that has less than adequate bone.
Placing mini implants is also often simpler and less time-intensive than placing full-sized implants. Full-sized implants generally require several months of healing before they can reliably support dental restorations, while mini implants can often support a denture right away.
The procedure for placing mini implants is usually simple and relatively pain-free, and the recovery time is often just a day or two. Modifications to the denture are made on the same day the implants are placed, so you can begin wearing it with your new implants right away.