Crowns are protective jackets, usually tooth-coloured, that are placed over a tooth to add strength when that tooth has been broken or is very worn, very heavily filled or has been root treated, (which makes a tooth more brittle and liable to fracture).

Bridges are a method of replacing missing teeth when they have been lost. There are 2 types of fixed bridgework: The first is an adhesive bridge involving little tooth preparation. The adhesive bridge is bonded into place on the teeth adjacent to the gap. The second type of bridge is conventional bridgework usually involving the placement of a crown on the tooth behind and in front of the gap with a false tooth fused to, and situated in-between, the crowns.