traininghaser.blogg.se - Dental anatomy 3d tooth atlas

Cementum is softer than the dentin and enamel.

It attaches the tooth to the alveolar bone. The cementum is a calcified substance that covers the root. This is due to the slightly different composition of dentin.

The dentin is softer and more susceptible to dental caries than the enamel. The dentin is sensitive to heat, cold, and touch, which appears as pain sensation. The nerve tissues provide stimuli to the pulp. It contains fine tubes called “dentinal tubules” which contain nerve tissues. It is the largest part of tooth structure, surrounding the pulp. The dentin is the second layer of the tooth, after the enamel.

Remineralization: when the oral pH rises, the enamel restores minerals (calcium and phosphate) from saliva, reversing the early stage of dental caries.

Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic). (pH is a measure of the acidic or basic character of an aqueous solution. The bacterial acid dissolves the enamel surface, which leads to the loss of calcium and phosphate ions, causing early stage of dental caries.

Demineralization: when oral bacteria decompose carbohydrates in food debris and produce acid, the oral pH drops below 5.5.

The tooth enamel is exposed to 2 processes: In contrast, acid can damage the enamel by detaching calcium and phosphate, causing dental caries. So, fluoride toothpaste can increase the strength of enamel. The fluoride increases the hardness of tooth enamel by converting the hydroxyapatite crystals to fluorapatite. It consists of 95% inorganic substance (mainly calcium and phosphate in the form of hydroxyapatite), 1% organic substance, and 4% water. Tooth enamel is the most resistant and hardest tissue in the human body. Also, it protects the tooth against external damaging forces. The enamel is the outer layer of teeth that covers the crown. The tooth is made of several layers of varying density and hardness: the enamel, dentin, cementum, and pulp. The number of roots is different from a person to another.

The root: it is the lower two-thirds of the tooth.

The neck: it is the area where the crown joins the root.

The crown is covered by enamel, the hardest substance in the human body.

The crown: it is the visible portion of the tooth that protrudes from the gum.

Tooth Anatomy: Parts of a ToothĮach tooth consists of 3 anatomical parts: the crown, neck, and root. However, they have the same tooth anatomy. Premolars and molars crush and grind food to make swallowing and digestion easier. Canines allow you to tear and grasp food.

Types of teeth and their functions: Incisors cut food. They crush food between the occlusal surfaces of upper and lower premolars and molars to make food swallowing and digestion easier. They have a wide and flat surface (occlusal surface) with several cusps. Premolars and molars: they are located behind canines.They hold food during biting to facilitate the cutting of food. Canines: they are located directly after the incisors.Incisors are sharp and allow food biting and cutting. Incisors: they are in the front area of the upper and lower jaw (4 in each arch).Every tooth in the oral cavity has a specific function: The main task of teeth is to cut, crush, and grind food, making swallowing and digestion easier. When the primary and permanent teeth erupt?.Tooth anatomy: the structure of a tooth and surrounding tissues.What are the types of teeth and their functions?.To understand how caries and other dental problems occur, you should know the tooth anatomy. However, bacterial acids can damage the teeth, causing dental caries and abscess. Usually, teeth can withstand high chewing force. Also, there are four types of teeth: incisors, canines, premolars, and molars. These teeth are later replaced by the permanent teeth (the 2nd set). The primary teeth start to erupt at about 6 months of age. The first set is known as baby, milk, primary, or deciduous teeth. Also, your teeth play an important role in talk and make you look good. With your teeth, you can cut, crush, and grind food to prepare it for swallowing and digestion.