In the unfortunate situation of losing all teeth, Implants can really help in many ways. Once one has lost all teeth, there are three ways one can get rehabilitated
First: Dentures without any implants. This has been a very traditional approach for a long time. The advantage of this solution is there is no additional surgery needed. However there are some serious shortcomings. Upper denture is generally very well fitting, stable with minimal complaints that are easily fixed. However the lower denture is generally unstable in case of large gap between tooth extraction and replacement. The wearer finds it unsatisfactory and chewing is a difficult process. Many a time food particles get stuck under the denture and make it very painful to chew. Most hard, or fibrous foods cannot be chewed. Dentures have to be taken out and cleaned after every meal, very embarrassing when eating out and most denture wearers choose to skip such social events. In addition, speech is also difficult and often the lower denture get pushed out while speaking causing embarrassment
Second: Implants for lower jaw, stabilizing the lower denture. This is called implant retained dentures, and all the unseating forces on the lower denture are taken care of by a few implants. Generally two to four implants are placed by the dentist, and actual number varies cases by case. Implants via special connectors, provide a very firm seating and grip for the lower denture and allows the patient to use the denture for normal and effective chewing. This is an easy option where, though a denture is still needed, most of the denture disadvantages are sorted out. Dentures being stable, patient can speak without fear of denture moving, can eat out without denture causing issues. Furthermore since the denture is sitting tight against the lower jaw, very minimal or no food particles get entrapped in-between denture and jaw
Third: Implant supported bridge, with no removable denture. All the required teeth are in a bridge, fixed on implants. Here many more implants are needed, and exact number depends on many factors, and is best answered by your dentist. In such cases bridges are made spanning the entire arch, with implants providing the necessary support. Such bridges obviate the need for any denture covering the mucosa. Not having dentures means the patient can taste the food better and normal chewing is possible. The appearance is also very natural looking. However in case there is severe bone deficiency then treatment may not be possible.
Your dentist will the best person to advise you regarding these options