ABSTRACT
The oral cavity is an external environment where a wide range of conditions are in constant change (i.e., pH, temperature, abrasion forces, presence of bacteria, etc.). However, under physiological conditions, the oral cavity is very tolerant and resistant to external challenges. In order to achieve this goal, the teeth and their associated structures, such as the jaws and gums, must display harmonious behavior and interrelationships. The anatomical design of teeth and associated tissues provides resistance to this hostile environment. However, several factors (diseases, physiologically unacceptable conditions, trauma, etc.) may alter the function and structure of the oral cavity elements. Clinical treatments directed to restore and maintain the normal functions of the oral structures (teeth and supporting tissues) are grouped in what is known as dentistry.
