What is the structure of a tooth?
- Crown – superior part of the teeth, normally .the only visible. Tooth crown shape determines its function. For example, front teeth are sharp and chisel-shaped for cutting, while molars have a flat surface for chewing.
- Muco-gingival junction – the line ofencounterof the teeth with gums. In the absence of proper brushing and flossing, the muco-gingival junction plaque and tartar accumulates, leading to gingivitis and other gum disease.
- Tooth enamel – the surface layer of the tooth. Enamel is the hardest and most intensely mineralized tissue in the body – however, can be damaged by decay without adequate care.
- Dentine – the layer under the enamel. When cavities destroy tooth enamel, the dentine is affected – hence, millions of tiny vessels make the connection with dental pulp.
- Pulp – the soft tissue found in the middle of all kinds of teeth that contains nerve endings and blood vessels. From pulp starts feeling pain when caries get to it.
- Root – the tooth inside your jawbone. The root is about two-thirds of the tooth and is fixing the tooth in the bone.
How many types are teeth?
- Incisors – the front teeth, sharp, chisel-shaped (four superiors and four inferiors) used for cutting food.
- Canines – have conical (tusks) and use to slash the food.
- Premolars – have at the occlusal surface a bicuspid or tricuspid crown. Serve to crush and tear.
- Molars – used in chewing, with more cusps (relief formations) on the occlusal surface