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).
The middle layer of a tooth is called the dentin layer. Dentin is generally a brownish-yellow color. Injuries to teeth that extend into dentin are generally a bit painful. Dentin has no nerves, but it is close enough to garner serious attention.