tooth crowns in London There are times when your tooth may require a dental crown. Usually when the enamel coating of a tooth no longer performs its function, a dental crown becomes relevant. A crown needs space to sit on your tooth. A portion of the enamel coating is scrapped away from the tooth to make the space. It is relevant to mention that the tooth enamel is the hardest substance found in the human body. When we eat or drink our teeth are exposed to mechanical, thermal