24: SA & LA Skull

Suture

Mandible

What are the two major bony components of the head?

Skull and mandible

Nasal bone

Lacrimal bone

frontal bone

Parietal bone

Temporal bone

Occipital bone

sphenoid bone

Palatine bone

Zygomatic bone

Maxilla

Incisive bone

Frontal bone

Forehead

In bovines, what else is on the frontal bone?

Cornual processes

What is the difference between the equine and bovine skull?

Horses have a facial crest.

Cows have a facial tuberosity.

Maxilla

Contains most of the upper teeth

Incisive bone

Premaxilla

Contains the per incisive teeth.

Nasal bone

Roof to the nasal cavity

Parietal bone

Forms the wall of the cranial cavity in which the brain sits

Frontal bone

Rostral to the parietal bone

Temporal bone

Located in the region of the temples

Zygomatic bone

Zygomatic process of the temporal bone and the zygomatic bone forms the zygomatic arch

What two structures form the zygomatic arch?

Zygomatic process of the temporal bone

Zygomatic bone

Sphenoid complex

The basisphenoid bone contains several foramina

Occipital bone

At the caudal aspect of the skull, articulates with the first vertebrae (atlas)

Palatine bone

Partially forms the hard palate.

What three bones contribute to the hard palate?

Palatine.

Maxillary.

Incisive.

Mandible

Incisive bone

Maxilla

Nasal bone

Lacrimal bone

Parietal bone

Frontal bone

Temporal bone

Occipital bone

Zygomatic bone

incisive bone

Palatine bone

Maxilla

Incisive bone

Nasal bone

Lacrimal bone

Frontal bone

Parietal bone

Occipital bone

Temporal bone

pteryhoid bone

Sphenoid bones

Palatine bone

Zygomatic bone

Maxilla

Zygomatic arch

Composed of the zygomatic bone, temporal bone, maximus.

Zygomatic arch is made up of the zygomatic process of the temporal bone and the temporal process of the zygomatic bone

Orbit

Eye hole

Incomplete in carnivores. You

Complete in horses and cows.

What completes the orbit bone in the carnivores?

Orbital ligament

Nasal aperture

Opening for the nasal cavity

Infraorbital foramen

Obvious and palpable.

Contains the maxillary nerve artery and vein, which becomes the infraorbital nerve artery and vein

’

What does the maxillary nerve artery and vein become and where?

Rostrally

Infraorbital nerve artery and vein

External acoustic meatus

Hole in the skull for the ear canal

What are three of the openings on the medial, mid sagittal view of the skull?

Nasal cavity

Cranial cavity

Paranasal sinuses

Zygomatic arch

Orbit

Infraorbital foramen

Nasal aperture

Orbit

Infraorbital foramen

Zygomatic arch

External acoustic meatus

Cranial cavity

Houses the brain

Cranial cavity

Paranasal sinuses

Nasal cavity

How are teeth identified?

On whether they shed or are are replaced

Permanent teeth

Replaced

Deciduous teeth

Shed

Brachydont

Teeth that have a crown, neck, root

Hypsodont teeth.

Continually erupting

Not continually growing

What happens to the maxillary sinus, in horses, when teeth erupt?

Gets bigger

How is tooth removal done in horses?

Trephine hole is created in the maxillary sinus, and the truth is hammered into the mouth for removal.

– the jaw cannot be opened white enough for dental extraction through the mouth.

What is the arrangement of teeth from rostral to caudal?

Incisors.

Canines.

Premolars.

Molars.

What is in the upper arcade on the right side of the dog?

Three incisors, one canine, for premolars, 2 molars

How are the premolars numbered (In dog)?

Rostral to caudal: p1, p2, p3, p4

Carnassial (shearing) teeth - dog, cat

Upper fourth premolar.

Lower first molar

What is imporant to note about the upper fourth pre-molar in dogs and cats?

Has 3 roots

Molars

carnassial tooth

PreMolars

Canines

Incisors

What is the tooth formula for a dog?

Incisors

Canines

Premolars

Molars

How do you find how many teeth there are based on the dental formula?

Dental formula Is only for one side so double it

Dental formula of fel

Incisors