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 defects. The surface layer of the teethâknown as the enamelâis considered the hardest mineral substance in the bodyâeven stronger than bone. Think of tooth enamel as the shield against tooth decay. But, when genetic defects occur, this protection can be hindered.