anatomy of mouth
TRANSCRIPT
ORAL CAVITY
It is the first part of digestive tract. It is
divided into two parts:
Oral cavity proper.
Vestibule.
ORAL CAVITY PROPER:
It is the larger part of the oral cavity.
Anteriorly: alveolar arches with teeth and
gums on each side.
Roof: hard and soft palate.
Floor: two mylohyoid muscles and other soft
tissues.
Posteriorly: palatoglossal arch.
VESTIBULE:
The vestibule of mouth is a narrow space
that lies outside the teeth and gums and
inside the lips and cheeks.
LIPS AND CHEEKS
Lips are a pair of mobile musculo-
fibrous folds that surrounds the opening
of the mouth.
The lips are lined externally by skin and
internally by mucous membrane.
Cheeks are the fleshy flaps which lie over
maxilla and mandible and form a large part
of the face. Each cheek is continuous n
front with the lip.
TEETH
Teeth are mineralized or horny structures
projecting from the jaws.
Each tooth consists of the following three
parts:
Crown: which projects above the gum.
Root, which is embedded within the socket
of jaw beneath the gum.
Neck, it is the constricted part of tooth
present between the crown and root.
TYPE OF TEETH
Incisors: There are 4 incisors in each jaw, two
on each side of the median plane.
Canines: There are two canines in each jaw,
one on each side, present lateral to the
incisors.
Two lateral margins
Two surfaces: Dorsal surface and Ventral
or inferior surface.
PALATE:
It is an osteomuscular partition between
nasal and oral cavities. It also seperates
Nasopharynx from oropharynx.
It consists of two parts:
Hard palate forms the anterior 2/3 rd of the
palate.
Soft palate forms the posterior 1/3 rd of the
palate.