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, sometimes called calculus, is plaque that has hardened on your teeth. Tartar can also form at and underneath the gumline and can irritate gum tissues. Tartar gives plaque more surface area on which to grow and a much stickier surface to adhere, which can lead to more serious conditions, such as cavities and gum disease.