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).
Tartar refers to mineral deposits on the teeth, both above and below the gums that have hardened. These deposits are easy to recognize since they tend to stain easily, and you may note places on the teeth with brown or yellow stains. These stains are usually not on the teeth themselves but to tartar, also called calculus, buildup. This buildup is distinct from plaque, which is caused by bacteria on the teeth, but both are usually present in the mouths of people who have poor oral hygiene.