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).
Enamel is the hardest and the most mineralized substance in the human body. It is the outer most layer of the tooth that naturally protects the inner layers of the tooth. If the enamel softens with a caivity then it can no longer protect the tooth and the tooth can become sensitive.