Dental implants are "roots" metal often called "fixtures" that are surgically put in the jaw under the gum. Once in place, the dentist can attach crowns to replace missing teeth.
What role-played by implants? 
The implants are part of the jawbone where they will provide stable support for prosthetic teeth. The aircraft will move more during chewing or speech, which has a huge advantage. There is also the possibility of several bridges between implants as if they were natural teeth. The bridges and crowns on implants or removable devices solidarity implants give a natural ally to a comfortable due to their fixity. For some people, bridges and removable appliances are not comfortable or even possible, due to painful areas, inadequate dental ridges or a reflex nauseous. On the other hand, bridges must be based on teeth located on both sides of the tooth to replace these teeth should be prepared, ground, to serve as a bridge pillar. The implants can avoid touching the adjacent teeth, so to damage it. Ask for implants is that the gums are healthy and there is enough bones to give them the needed space. You should also know that it would maintain all in good health. An oral hygiene and meticulous regular visits to the dentist are imperative for long-term success of implants. The implants are usually more expensive than other methods of replacing teeth.