Term paper. A term paper is a research paper written by students over an academic term, accounting for a large part of a grade. Term papers are generally intended to describe an event, a concept, or argue a point.
Figure 1. Crown of the tooth. The teeth are made up of two major parts: the crown and the root. The crown of the tooth is what is visible in the mouth (Figure 1). The root of the tooth is the portion which normally not visible in the mouth and is anchored within the bone (Figure 2).
Tooth enamel is the hard coating of the teeth. If this gets worn away it is called tooth enamel erosion or dental erosion. Acid in food and drink attacks the enamel on the teeth and is the main cause of dental erosion. Saliva in the mouth works hard to get rid of acid from the mouth to protect the teeth.