Bridges
A bridge is a device that is used as one of the ways of replacing a missing tooth. There are two types of bridge:
a conventional bridge or an adhesive bridge.
Conventional bridge
A false tooth is attached to a crown on one or both sides of a gap.
It involves quite extensive drilling of the tooth [or teeth] to which the false tooth will be attached. The crowns are either made
of gold, a non-precious metal, or a combination of metal and porcelain. The false tooth is usually made out of tooth-coloured porcelain.
Once
the teeth have been prepared, a mould (impression) of the affected teeth is made. This is sent to a laboratory for the bridge to be
made; it usually takes two weeks. In the meantime, to prevent any sensitivity, a temporary bridge covers the drilled teeth.
Once it
has been manufactured, the bridge will be tried in place. It may require some adjustments before it is cemented in permanently.
The
advantages of a conventional bridge are that it is strong and not removable. The disadvantage is that it involves extensive drilling
of the adjacent teeth.
Adhesive bridge
A false tooth is attached to a wing of metal
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 the
adjacent teeth. An injection is normally not required. Once the teeth have been prepared, a mould is made and sent to a laboratory
which makes the bridge. The bridge usually takes two weeks to make. No temporary bridge is required.
When using an adhesive bridge
to replace a front tooth, the metal wing is stuck onto the back of the adjacent tooth and so cannot be seen from the front. An adhesive
bridge replacing a back tooth will have metal wings on one or both sides of the gap. These may be visible if the mouth is opened wide.
The
adhesive bridge is stuck on with a very strong glue The process requires that the teeth be dry whilst glueing.
The advantages of an
adhesive bridge are that it is not removable and requires very little drilling of the 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. In some instances, it may be best to leave a gap.
Alternative treatments to bridges include
removable dentures (false teeth) or dental implants (screw-in teeth).