Week 2 Wet again Flashcards
Parts of Mandible?
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
How many teeth do you have?
Primary:
- 8 incisors
- 4 canines
- 8 molars
Permanent:
- 8 incisors
- 4 canines
- 8 premolars
- 12 molars
Describe what makes up the TMJ and what kind fo joint it is?
Temporomandibular joint
Synovial Hinge and sliding
Mandibular Condyle + Mandibular fossa of temporal bone
Function of TMJ?
- Depresses & Elevates Mandible
- Protrudes & Retracts mandible
- Side to side movement of mandible
List the muscles of mastication?
Temporalis
Masseter
Lateral & Medial Pterygoid
Suprahyoids also depress the mandible (except stylohyoid)
Attachments & function of temporalis muscle?
Temporal lines of parietal bone
Coronoid process of mandible
Horizontal fibes - Retract mandible
Verticle fibres - Elevate mandible
Attachments and function of masseter?
Zygomatic Arch
Outer ramus and Coronoid process of mandible
Elevates mandible
Attachment and functions of lateral pterygoid muscles?
- Lateral surface of lateral pterygoid plate
- Neck of mandible within joint capsule of TMJ
Protraction of mandible
Attachment and functions of medial pterygoid muscles?
Medial surface of lateral pterygoid plate
Medial surface of mandibular ramus
Elevate Mandible
How do you produce side to side movement of the TMJ?
Contract contralateral medial and lateral pterygoids
What is the inferior alveolar nerve?
Sensory branch of V3
Enters mandibular foramen
From where does the Mandibular Division of V3 give off its motor branches?
The infratemporal fossa
Functions of the nose?
- Traps Dirt
- Humidifies and warms air
- Smell
- Draining sinuses
- Vocal Resonance
Bones of the Lateral Nasal wall:
- Frontal
- Nasal
- Maxilla
- Ethmoid
- Inf Turbinate
- Palatine
- Sphenoid
Bones/cartilage of nasal septum?
Perpendicular plate of ethmoid
Vomer
NAsal Cartilage
What makes up the floor of the nasal cavity?
Palatine process of maxilla
Palatine Bone
Soft Palate
What part of the ethmoid bone forms the nasal roof?
Cribriform plate
What part of the ethmoid bone extends above the cribriform plate and what does it attach to?
Crista Galli
Attaches to Falx Cerebri
Epithelium of nasal cavity?
Pseduostratified Columnar Ciliated Epithelium
i.e. Respiratory
Dsescibr ete major vessels of the nasal septum
Ant & Post Ethmoidal Arteries come superioly
Sphenopalatine art comes posteriorly
Septal brannch of superior labial art comes anteriorly
Describe the major vessels of the lateral nasal wall?
Ant & Post Ethmoidal Arteries come superiorly
Sphenopalatine comes posteriorly
Nasal Branches of Facial come anteriorly
Area of maximum epistaxis?
Littles area of Kiesellbach area
At the anastomoses of the vessels of the nasal septum
Function & List of paranasal sinuses?
- Vocal Resonance
- Buffers Trauma
- Reduces skull weight
Frontal - Sphenoid - Ant/Middle/Post Ethmoid Air cells - Maxillary
What drains into each nasal meatus?
# 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
What innervates each sinus?
V1 does Frontal & Ethmoidal
V2 does MAxillary
Both V1 & V2 do Sphenoid
