In most cases it isn’t necessary to have an anaesthetic for a Maryland bridge. It is usually necessary for a conventional bridge, unless the tooth or teeth being used for the retainers have already had root canal treatment. Your dentist will let you know before work begins whether you need anaesthetic and, if you do, will anaesthetise the teeth before working on them so that you don’t feel anything.
Dental bridges should last for many years. This does heavily depend on how you care for them. Consider the daily habits that could be affecting your bridges, and you'll be able to extend their wear.
Usually because you have had a tooth extracted or knocked out in an accident, leaving you with a gap in your teeth. Closing the space is important for cosmetic reasons, but your dentist has good clinical reasons to fill in the space, too: leaving the gap open can put extra strain on the teeth either side. It can also affect your “bite” – the teeth on either side of the gap may lean together into the space and alter the way that the upper and lower teeth meet, which can cause further problems.