Mexico. Comprised of 31 states and one federal district, the nation of Mexico is home to the worldâs largest population of Spanish speakers. From the temples of Chichen Itza, to the beaches of Cancun or the bustle of Mexico City, Mexico boasts a diverse landscape and rich history. 1  Facebook. 2  Twitter. 3  Google.
Dental caries, also known as tooth decay, cavities, or caries, is a breakdown of teeth due to activities of bacteria. The cavities may be a number of different colors from yellow to black. Symptoms may include pain and difficulty with eating. Complications may include inflammation of the tissue around the tooth, tooth loss, and infection or abscess formation.
Dentin is the layer of the tooth just under the enamel. It is yellow in color. It is also softer that enamel. It is one of the three layers of the tooth. The enamel is the outer layer, the dentin is the middle layer, and the pulp is the inside layer. Decay that has extended to this layer of the tooth can spread rapidly, and needs to be treated quickly by a dentist.