Dental Anatomy

Front 1

Cortical Bone

Back 1

The dense outer layer of bone, resists the passage of the xray beam and appears radiopaque on a dental image

Front 2

Cancellous Bone

Back 2

Soft, spongy bone located between 2 layers of dense cortical bone

Front 3

Tuberosity

Back 3

A rounded prominence of bone that extends posterior to the third molar region

Front 4

Hamulus

Back 4

A small hooklike projection of bone extending from the medial pterygoid plate of the sphenoid bone

Front 5

Zygomatic Process

Back 5

The bony projection of the maxilla that articulates with the zygomar or malar bone composed of dense cortical bone

Front 6

Saggital Plane

Back 6

Is a vertical plane which passes from front to rear dividing the body into right and left halves

Front 7

Horizontal Plane

Back 7

Is an imaginary plane that dived the body into superior and inferior parts, it is perpendicular to the coronial and saggital planes

Front 8

Frontol (Coronial) Plane

Back 8

Is any vertical plane that divides the body into front and rear sections

Front 9

Occlusal Plane

Back 9

Refers to contact between teeth when the jaw is closed and stationary

Front 10

Frankfurt plane

Back 10

An imaginary line that passes from the highest point of the ear canal through to the lowest point of the eye socket

Front 11

Enamel

Back 11

The hard translucent substance covering the exposed portion of the tooth

Front 12

Dentine

Back 12

Hard portion of the root that surrounds the pulp and it covered by enamel on the crown and by the cementum of the root

Front 13

Pulp Chamber

Back 13

The natural cavity in the central portion of the tooth crown that is occupied by the dental pulp

Front 14

Cementum

Back 14

Specialised calcified connective tissue that covers the atomic root of the tooth given attachment to the periodontal ligament

Front 15

Periodontal ligament

Back 15

The fibrous connective tissue that surrounds the root of a tooth separating it from an attachment to the alveloar bone and serving to hold the tooth in its socket

Front 16

Anatomical crown

Back 16

Portion of the tooth that is covered by enamel

Front 17

Apical foramen

Back 17

An opening at or near the apex of the root of the tooth given passage to surrounding structures supplying the pulp

Front 18

Alveolar Bone

Back 18

The thin layer of bone making up the bony processes of the maxilar and mandible surrounding and containing the teeth

Front 19

Lamina Dura

Back 19

A sheet of compact alveolar bone that lies adjacent to the periodontal membrane, the lining of the alveolus

Front 20

Gingiva

Back 20

The mucous membrane (gum) with supporting fibrous tissue covering the tooth bearing border of the jaw

Front 21

Hard palate

Back 21

The anterior portion of the palate separating the oral and nasal cavities

Front 22

Tonsil

Back 22

A small oral mass of lymphoid tissue especially either of two such masses embedded in the lateral walls of the opening between the mouth and the pharynx

Front 23

Upper labial frenum

Back 23

The vertical band of oral mucosa connecting the lip of the residual alveolar ridge near the midline of the maxillary arch

Front 24

Retromolar pad

Back 24

A cushioned mass of soft tissue located on the alveolar process of the mandible behind the area of the last natural molar tooth

Front 25

Lower labial frenum

Back 25

The vertical band of oral mucose connecting the lip of the residual alveolar ridge near the midline of the mandible arch

Front 26

Soft palate

Back 26

The fleshy part of the palate extending from the posterior edge of the hard palate

Front 27

Mandibular vestibule

Back 27

Connecting passage. The space between the buccal and the labial aspect of the teeth and gingiva and the inner aspect of the teeth and lips.

Front 28

Uvula

Back 28

A small conical fleshy mass of tissue suspended from the centre of the soft palate

Front 29

Orbital

Back 29

Eye area that is covered by the eyelids

Front 30

Zygomatic

Back 30

Prominence of the cheek

Front 31

Foramen

Back 31

An opening or hole in a bone that permits the passage of nerves and blood vessels

Front 32

Fossa

Back 32

A broad, shallow, scooped-out or depressed area of bone. An example is the submandibular fossa of the mandible.

Front 33

Sinus

Back 33

A hollow space, cavity, or recess in bone. An example is the maxillary sinus.

Front 34

Septum

Back 34

A bony wall or partition that divides two spaces or cavities. A septum may be present within the space of a fossa or sinus. A bony septum appears radiopaque, in contrast to a space or cavity, which appears radiolucent. An example is the nasal septum.

Front 35

Suture

Back 35

An immovable joint that represents a line of union between adjoining bones of the skull. Sutures are found only in the skull. On dental images, a suture appears as a think radiolucent line. An example is the median palatine suture of the maxilla.

Front 36

Incisive foramen

Back 36

Also known as the nasopalatine foramen. Is an opening or hole in the bone located at the midline of the anterior portion of the hard palate directly posterior to maxillary central incisors.

Front 37

The superior foramina of the incisive canal

Back 37

Are the 2 tiny openings or holes in bone that are located on the floor of the nasal cavity. Foramina is the plural of foramen.

Front 38

The median palatine suture

Back 38

Is the immovable joint between the 2 palatine processes of the maxilla (the palatine processes of the maxilla form the major portion of the hard palate)

Front 39

The lateral fossa

Back 39

Also known as the canine fossa. Is a smooth depressed area of the maxilla located just inferior and medial to the infraorbital foramen between maxillary canine and lateral incisors.

Front 40

The nasal cavity

Back 40

Also known as the nasal fossa, is a pear shaped compartment of bone located superior to the maxilla. The inferior portion, or floor, of the nasal cavity is formed by the palatal processes of the maxilla and the horizontal portions of palatine bones.

Front 41

(DEJ) Dentino enamel junction

Back 41

Is the junction between the dentine and enamel of the tooth. The DEJ appears as a line where the enamel (very radiopaque) meets the dentine (less radiopaque)