Access cavity for upper 4 & 5 premolar has two roots and two canals:
1- Ovoid ***
2- Square.
3- Triangular.
Oral cavity or oral cavity is the space in front of the oral pharynx and its walls are formed of cheeks and upper and lower lips. The nasal cavity is separated from the nasal cavity by a bone structure called the hard palate. When the mouth is opened, the oral cavity is connected to the outer medium.
The anatomy of the oral cavity (during the occlusion of the teeth) is divided into two sections: a large internal section called the private oral cavity (the private oral cavity), and a small external section called the vestibule of the mouth. The two sections are separated by the teeth and the upper and lower teeth, but the two sections remain connected through a space behind the last molar and in front of the lower jaw branch.
The oral cavity contains important elements in the digestion process. The teeth have an important role in the process of cutting, shredding and grinding food, and the tongue has an important role in the processes of taste and swallowing in addition to his role (non-digestive) in speech. Open the oral cavity ducts salivary glands, which secrete important saliva in the process of digestion.
The larynx is the cavity that starts from the entrance of the larynx down to the lower edge of the cartilage where it continues with the tracheal cavity.
The emergence of the vocal cords divides the larynx cavity into two parts, including a narrow triangular opening, the opening of the muzzle.
Inside the larynx is the following:
- Upper: the larynx of the larynx, located above the vocal cords, is a broad and triangular shape; its base (or front wall) protrudes to the front.
- Mid: At the middle of the larynx of the larynx is the posterior appearance of the tubercle of the tongue of the psalm.
- Bottom: The cavity under the pimple is the part located below the vocal cords, and start to be in the form of ellipsoid (ellipse), and then widens down down into a circular shape, and continues with the tube trachea.
- There are laryngeal folds of vestibular folds.
- Laryngeal ventricles are found between vestibular folds and vocal cords.
Oral cavity or oral cavity is the space in front of the oral pharynx and its walls are formed of cheeks and upper and lower lips. The nasal cavity is separated from the nasal cavity by a bone structure called the hard palate. When the mouth is opened, the oral cavity is connected to the outer medium.
The anatomy of the oral cavity (during the occlusion of the teeth) is divided into two sections: a large internal section called the private oral cavity (the private oral cavity), and a small external section called the vestibule of the mouth. The two sections are separated by the teeth and the upper and lower teeth, but the two sections remain connected through a space behind the last molar and in front of the lower jaw branch.
The oral cavity contains important elements in the digestion process. The teeth have an important role in the process of cutting, shredding and grinding food, and the tongue has an important role in the processes of taste and swallowing in addition to his role (non-digestive) in speech. Open the oral cavity ducts salivary glands, which secrete important saliva in the process of digestion.
The larynx is the cavity that starts from the entrance of the larynx down to the lower edge of the cartilage where it continues with the tracheal cavity.
The emergence of the vocal cords divides the larynx cavity into two parts, including a narrow triangular opening, the opening of the muzzle.
Inside the larynx is the following:
- Upper: the larynx of the larynx, located above the vocal cords, is a broad and triangular shape; its base (or front wall) protrudes to the front.
- Mid: At the middle of the larynx of the larynx is the posterior appearance of the tubercle of the tongue of the psalm.
- Bottom: The cavity under the pimple is the part located below the vocal cords, and start to be in the form of ellipsoid (ellipse), and then widens down down into a circular shape, and continues with the tube trachea.
- There are laryngeal folds of vestibular folds.
- Laryngeal ventricles are found between vestibular folds and vocal cords.
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