Bones

Question 1

Bones of face

Answer 1

• Mandible
• Two maxillae
• Two zygomatic(cheek bones)
• Vomer
• Two palatine
• Two nasal
• Two lacrimal
• Two inferior nasal conchae

Question 2

Maxilla shape

Answer 2

• Large hollow body
• Four projecting processes of bone

Question 3

Parts of maxillae

Answer 3

• Body
• Maxillary sinus/antrum
• Bony processes

Question 4

Shape of body of maxilla

Answer 4

• Four sided, hollow pyramid
• Base oriented vertically toward nasal cavity

-Apex extending laterally toward Zygomatic bone

Question 5

Superior portion of maxilla forms

Answer 5

Floor of orbit of eye(location of infraorbital fissure which becomes infraorbital canal)

-(Infraorbital nerves and vessels exit canal on face through infraorbital foramen)

Question 6

Foramen on the anterior surface of body of maxilla

Answer 6

Infraorbital foramen

Question 7

Sinus

Answer 7

-Hollow space within bones

-Found on Sphenoid, Frontal, Ethmoid and Maxilla bones

Question 8

Function of maxillary sinus

Answer 8

(a) lighten the skull, (b) give resonance to the voice, (c) warm breathed air (d) moisten the nasal cavity

Question 9

Capacity of maxillary sinus

Answer 9

15ml/1 tablespoon

Question 10

Shape of Maxillary sinus

Answer 10

• Large four sided, pyramid shaped cavity
• On body of each maxilla

Question 11

Importance of Maxillary sinus and teeth

Answer 11

-Sinus floor extends onto superior portion of maxillary alveolar process(apices of molar and premolar roots found)

-Very thin bone between sinus and roots or no bone replaced with PDL fibres

Question 12

Enter the maxilla and sinus

Answer 12

• Nerves to maxillary molars(PSA nerve)
• Enter through alveolar canals

Question 13

can be mistaken for tooth pain

Answer 13

Infection in sinus

Question 14

Maxillary sinus opens into

Answer 14

-Nasal cavity from anterosuperior wall

Question 15

Bony processes of each maxilla

Answer 15

–Frontal(nasofrontal)process

-Zygomatic process

-Alveolar process

-Palatine process

Question 16

Frontal (nasofrontal) process

Answer 16

-Medial edge joins with nasal bone and frontal bone

Question 17

Zygomatic process

Answer 17

• Bulky, forms anterior facial surface of each maxilla
• Joins with maxillary process of Zygomatic bone

Question 18

Mandible

Answer 18

• Largest and strongest bone of the facial skeleton
• Develops in two halves that unite early and ossify during first year of life

Question 19

Mandible parts

Answer 19

• Body (horseshoe-shaped)
• Ramus (flat, wide bone extending superiorly from the body)
• Alveolar ridge -Coronoid process
• Condyloid process

-Mandibular notch

Question 20

The mandible articulates with

Answer 20

-Surface of squamous part of temporal bone

Question 21

Important landmarks of mandible

Answer 21

• Symphysis menti
• -Mental protuberance*
• -Mental foramen*
• -Inferior margin of the mandible*
• -Mandibular notch*
• Mandibular foramen*
• -Lingula*
• -Mental spines*
• -Sublingual fossa*
• -The digastric fossae*
• -The mylohyoid line*
• -Submandibular) fovea*

Question 22

Symphysis menti

Answer 22

-A median ridge at the site of embryonic fusion

Question 23

Mental protuberance

Answer 23

Triangular area at the inferior end of symphysis menti and is surrounded by the smaller mental tubercles

Question 24

Mental foramen

Answer 24

• Located 2.5 cm from the midline between the first and second premolars
• Transmits the mental vessels and nerve

Question 25

*Mandibular notch*

Answer 25

-Concavity of the upper border of the **ramus** between the coronoid and the condylar processes -Transmits the motor nerve and vessels to the **masseter muscle**

Question 26

*Mandibular foramen*

Answer 26

- Near centre of the medial surface of the **ramus** of the mandible - Transmits the **inferior alveolar nerve** and **vessels** to the teeth

Question 27

*Lingula*

Answer 27

Spur of bone overhanging the **mandibular foramen**

Question 28

*Mental spines*

Answer 28

Mark the insertions of the genioglossus and geniohyoid muscles

Question 29

*The sublingual fovea*

Answer 29

- Located on each side of the **genial tubercle** - Adjacent to the **sublingual gland**

Question 30

*The digastric fossae*

Answer 30

-Attachment of the anterior belly of the digastric muscle

Question 31

*The mylohyoid line*

Answer 31

-located behind the **sublingual fovea** **-M**arks the attachment of the **mylohyoid muscle**

Question 32

*Submandibular fovea*

Answer 32

-Below the **mylohyoid line** is adjacent to the **submandibular gland**