A bridge can be used tooth. There are two types of bridge: a conventional bridge or an adhesive bridge.
A false tooth is attached to a crown on one or both sides of the gap. It involves extensive drilling of the tooth, or teeth, to which the false tooth will be attached.
A false tooth is attached to a wing of metal or porcelain and the wing is then glued to the adjacent tooth.
With this type of bridge there is no, or only a small amount of, drilling of adjacent teeth. An injection is normally not required.
An adhesive bridge is best used to replace a front tooth. The wing is stuck on to the back of the adjacent tooth and so cannot be seen from the front.
The adhesive bridge is stuck on with a very strong glue. The process requires that the teeth be dry whilst gluing.
The advantages of an adhesive bridge are that it is not removable and requires very little drilling of adjacent teeth. The disadvantage is that it sometimes falls off (though it is easily stuck back on). An adhesive bridge might not be suitable for those who grind their teeth or who play contact sports.
A bridge is not always possible or suitable, for example if there are too many teeth missing, or if the remaining teeth or gums are not healthy.