facial bones / CH 11

How many facial bones are there?

14

The facial bones contribute to

Contributes to the shape and form of the persons face.

2 maxillae

2 zygomatic bones

2 lacrimal bones

2nasal bones

2 inferior nasal conchae

2 palatine

1 vomer

1 mandible

Right & Left Maxillary Bones are the …….

Structurally the most important bones of face.

Solidly united at midline below nasal septum.

Each help form facial cavities:

1. mouth

2. nasal cavity

3. 1 orbit

______ bones are the Largest immovable bones of face.

Maxillary bones, most important bones of the face

Maxilla bones consists of

-Centrally located BODY.

Four processes:

• frontal process

• zygomatic process

• alveolar process

• palatine process

The two maxilla unite in the midline anteriorly. At the. …..

Solidly unite at midline anteriorly: At anterior nasal spine

( acanthion)

The body of maxillae contains

Contains large, air filled cavity – Called maxillary sinus:

• communicates with :nasal cavity, which are called paranasal

sinuses

The two Palatine processes form the ….

– form ANTERIOR portion of the roof of mouth called hard or bony palate

– solidly united at the midline to form a synarthrodial joint

cleft palate:

opening between the

palatine processes

Maxillae (Maxillary bones)Articulate with:

2 cranial bones: frontal and ethmoid

7 facial bones: zygoma, lacrimal, nasal, palatine,

inferior nasal concha, vomer, maxilla

Zygomatic Bones (2)Malar Bones forms the ….

Forms prominence of cheeks.

• Makes up lower outer portion of orbits.

Slender process fairly delicate that Projects posteriorly. Connects to the

zygomatic process of temporal bone

Zygomatic arch

Zygomatic Bones (2)malar Bones articulate with?

Articulate with:

• 3 cranial bones: frontal, sphenoid, and temporal

• 1 facial bone: maxilla

Thinnest most fragile bones in the body

Lacrimal bones

Lacrimal bones

Small and delicate bones: About size & shape of fingernail.

-Lie anteriorly on medial side of each orbit.

- Closely associated with tear ducts

Derived from word meaning “tear “

Two lacrimal bones articulate with

Articulate with:

 2 cranial bones: frontal and ethmoid

 2 facial bones: maxilla and inferior nasal concha

Nasal Bones (2

Fused to Form the bridge of nose

- Most of nose made of cartilage

• Lie anterior & superomedial to frontal processes of maxillae & Inferior to frontal bone

Inferior Nasal Conchae (2)(Turbinates)

- 2 Scroll-shaped (platelike, curved) facial bones.

• Project from lateral walls of nasal cavity & extend

medially.

Nasal bones articulate with

Articulate with:

 2 cranial bones: frontal and ethmoid

 2 facial bones: maxilla and adjacent nasal bone

The effect of the nasal conchae is to divide

• Effect: Divide nasal cavities into various compartments: Breaks up or mixes the flow of air coming into the nasal cavities before reaching the lungs

The inferior nasal conchae articulates with

Articulate with:

- 1 cranial bone: ethmoid

- 3 facial bones: maxilla, lacrimal, and palatine