What are incisors?

Incisors are defined specifically as the four anterior teeth located in either the upper or lower jaw. These teeth are characterized by their thin, sharp edges, which make them ideal for cutting and slicing food. Incisors come in pairs, with two on the upper jaw (maxilla) and two on the lower jaw (mandible) on either side of the midline, resulting in a total of eight incisors in an adult human mouth.

The role of incisors is crucial in the initial phase of the digestive process, as they facilitate the biting off and cutting of food into smaller pieces, making it easier to chew and swallow. Understanding the anatomy and function of incisors helps in various fields, including dentistry, nutrition, and anatomy, emphasizing their significance in oral health and overall well-being.

The other options present different medical or anatomical concepts unrelated to teeth: one refers to the formation of a blocked area in blood supply (infarct), another describes types of scars, and the last pertains to an obstruction in the bowel. Thus, option B distinctly identifies a specific type of tooth, making it the correct choice.