Crown: The top of the tooth, and the only part visible. The front teeth are sharp and chisel-shaped for cutting. these are called Incisors and canines. While molars and premolars have flat surfaces for grinding.
Neck: Its where the tooth and the gums meet. Without proper brushing and flossing, plaque and tartar can build up at the gum line, leading to gingivitis and gum disease.
Root: The part of the tooth that is embedded in bone. The root makes up about two-thirds of the tooth and holds the tooth in place.
Enamel: The outermost covering of the tooth. Enamel is the hardest tissue in the body. But it can be damaged by decay if teeth are not maintained well.
Dentin: The Second layer of the tooth under the enamel. If decay is able to progress its way through the enamel, it next attacks the dentin. Here dentinal tubes lead directly to the dental pulp.
Pulp: The soft tissue found in the center of all teeth, where the nerve tissue and blood vessels are. If tooth decay reaches the pulp, pain is felt.
Infection progressing to the pulp will cause intense pain. It can also spread to the bone.