Week 2 Wet again

Question 1

Parts of Mandible?

Answer 1

Starting at the middle:

• Symphisis
• Mental Foramen
• Body of Mandible
• Angle of Mandible
• Ramus
• Coronoid process (the ant one)
• Mandibular Condyle (The Post one) [Connects to ramus by a neck]

# Also mandibular foramen on the inside of the ramus
# Mylohyoid line on the inside of the body/ramus where the mylohyoid muscle connects
# Also Mental Spines on internal surface of symphisis

Question 2

How many teeth do you have?

Answer 2

Primary:

• 8 incisors
• 4 canines
• 8 molars

Permanent:

• 8 incisors
• 4 canines
• 8 premolars
• 12 molars

Question 3

Describe what makes up the TMJ and what kind fo joint it is?

Answer 3

Temporomandibular joint
Synovial Hinge and sliding

Mandibular Condyle + Mandibular fossa of temporal bone

Question 4

Function of TMJ?

Answer 4

• Depresses & Elevates Mandible
• Protrudes & Retracts mandible
• Side to side movement of mandible

Question 5

List the muscles of mastication?

Answer 5

Temporalis
Masseter
Lateral & Medial Pterygoid
Suprahyoids also depress the mandible (except stylohyoid)

Question 6

Attachments & function of temporalis muscle?

Answer 6

Temporal lines of parietal bone
Coronoid process of mandible

Horizontal fibes - Retract mandible
Verticle fibres - Elevate mandible

Question 7

Attachments and function of masseter?

Answer 7

Zygomatic Arch
Outer ramus and Coronoid process of mandible

Elevates mandible

Question 8

Attachment and functions of lateral pterygoid muscles?

Answer 8

• Lateral surface of lateral pterygoid plate
• Neck of mandible within joint capsule of TMJ

Protraction of mandible

Question 9

Attachment and functions of medial pterygoid muscles?

Answer 9

Medial surface of lateral pterygoid plate
Medial surface of mandibular ramus

Elevate Mandible

Question 10

How do you produce side to side movement of the TMJ?

Answer 10

Contract contralateral medial and lateral pterygoids

Question 11

What is the inferior alveolar nerve?

Answer 11

Sensory branch of V3

Enters mandibular foramen

Question 12

From where does the Mandibular Division of V3 give off its motor branches?

Answer 12

The infratemporal fossa

Question 13

Functions of the nose?

Answer 13

• Traps Dirt
• Humidifies and warms air
• Smell
• Draining sinuses
• Vocal Resonance

Question 14

Bones of the Lateral Nasal wall:

Answer 14

• Frontal
• Nasal
• Maxilla
• Ethmoid
• Inf Turbinate
• Palatine
• Sphenoid

Question 15

Bones/cartilage of nasal septum?

Answer 15

Perpendicular plate of ethmoid
Vomer
NAsal Cartilage

Question 16

What makes up the floor of the nasal cavity?

Answer 16

Palatine process of maxilla
Palatine Bone

Soft Palate

Question 17

What part of the ethmoid bone forms the nasal roof?

Answer 17

Cribriform plate

Question 18

What part of the ethmoid bone extends above the cribriform plate and what does it attach to?

Answer 18

Crista Galli

Attaches to Falx Cerebri

Question 19

Epithelium of nasal cavity?

Answer 19

Pseduostratified Columnar Ciliated Epithelium

i.e. Respiratory

Question 20

Dsescibr ete major vessels of the nasal septum

Answer 20

Ant & Post Ethmoidal Arteries come superioly
Sphenopalatine art comes posteriorly
Septal brannch of superior labial art comes anteriorly

Question 21

Describe the major vessels of the lateral nasal wall?

Answer 21

Ant & Post Ethmoidal Arteries come superiorly
Sphenopalatine comes posteriorly
Nasal Branches of Facial come anteriorly

Question 22

Area of maximum epistaxis?

Answer 22

Littles area of Kiesellbach area

At the anastomoses of the vessels of the nasal septum

Question 23

Function & List of paranasal sinuses?

Answer 23

• Vocal Resonance
• Buffers Trauma
• Reduces skull weight

Frontal - Sphenoid - Ant/Middle/Post Ethmoid Air cells - Maxillary

Question 24

What drains into each nasal meatus?

Answer 24

# Sphenoethmoid recess - SPhenoid sinus
# Sup Meatus - Post Ethmoid Air cells
# Middle Meatus - Maxillary Sinus/Frontal Sinus/Ant & Middle Ethmoid Air Cells
# Inf Meatus - Nasolacrimal Duct

Question 25

What innervates each sinus?

Answer 25

V1 does Frontal & Ethmoidal
V2 does MAxillary
Both V1 & V2 do Sphenoid