(Our own cases)
One missing tooth: If the tooth and the root have both been damaged, the longest lasting solution is an implant with a ceramic crown.
Several missing teeth: The bridge fastened to implants in the chewing region is a stable, secure solution, thus the patient can eat whatever they want.
Completely toothless jaw: Bridge fastened upon implants, good chewing function.
Overdenture: Solid, stable solution, life-long lasting.