Exam 6. Chapter 26 Flashcards
Bones of skull
Surrounds brain and protects it from injury.
Forms facial features.
Participates in the growth process of jaws.
Malocclusion
Improper relationship of the teeth and jaws. (Max. To mand. Teeth)
How many bones in the skull
22
Bones of skull decided in
2 groups:
- neurocranium
- viscerocranium
Neurocranium
Bones surrounding the brain.
- frontal (1)
- sphenoid (1)
- ethmoid (1)
- occipital (1)
- temporal (2)
- parietal (2)
Viscerocranium
Bones of the face:
- mandible (1)
- vomer (1)
- nasal bones (2)
- lacrimal (2)
- zygomatic (2)
- inferior nasal concha (2)
- palative (2)
- maxilla (2)
Suture
Joining together of 2 or more bones
Foramen
Short tubelike opening through bone
Canal
Long tubelike opening through bone
Orbit
Eye cavity
Tim of the orbit comes from
Frontal, zygomatic and maximally bones
Most difficult view of skull for student
Inferior view
Hard palate formed by
Palatal process of maxilla
Palatal process of palatine bones
Sphenooccipital synchondrosis
Major area of endochondral bone formation- develops facial profiles and malocclusions
Supraorbital notch (foramen)
Upper rim of orbit. Nerve and blood supply to forehead
Coronal suture
Formed between frontal and parietal bones
Infraorbital foramen
Arteries and nerves to upper lip lower eyelid and side of nose
Canine eminence
Ridge of bone over max. Canines
Canine fossae
Depression in bone above canine eminence
Alveolar process
Forms in the pockets that the teeth sit in
Mental foramen
Mandible-mental nerve and vessels pass to chin, lower lip and labial gingiva of anterior mandible
Optic foramen
Opening in orbit where optic nerves enters in
Lambdoid suture
Formed from Parietal and occipital bones
Squamosal suture
Squamous portion of temporal and parietal bones. - overlapping suture
Mastoid process
Projection of temporal behind external auditory meatus -insertion point for sternocleidomastoid muscle (SCM)
Zygomatic arch
Projects the temporal and joins with zygoma
Glenoid fossa
Part of temporal bone where consume articulates (part of TMJ)
Styloid process
Projection behind ear- attachment for muscle and ligaments.
Foramen ovale
Branch of V3 (mandible)
Foramen rotundum
Branch of V2 (maxilla)
Foramen spinosum
Middle meningeal artery-blood supply to the covering of the brain.
Stylomastoid foramen
VII exits to muscles of facial expressions
Carotid canal
Opening for internal carotid artery
Crista galli
Attachment for the layers covering the brain
Cribeiform plate
Passage for olfactory nerves (smell)
Anterior cranial fossa
Houses frontal lobe of the brain
Hypophyseal fossa
Houses pituitary gland
Foramen magnum
Large opening toward posterior of skull on inferior view (spinal cord)
Middle cranial fossa
Houses temporal lobe of brain
Posterior cranial fossa
Houses brain stem and cerebellum
Sagital suture
Formed between parietal bones (midline of skull)
Hamulus
Movements of anterior soft palate
Pterygopalatine fossa
Major nerve/blood vessels to oral/nasal cavity branch -between maxilla and pterygoid process.
Medial pterygoid plate
Medial ptergoid muscle arises
Lateral pterygoid plate
Lateral ptergoid muscle arises
Maxillary processes
A) frontal
B) zygomatic
C) alveolar process
D) horizontal palatine
Maxillary sinuses
Largest of paranasal sinuses -infection affects teeth and vice versa.
Anterior nasal spine
Radiographic landmark for cephalometric films (ortho)
Maxillary tuberosity
Bulge of bone posterior to maxillary 3rd molars. -much of growth of maxilla takes place.
Hiatus
Opening into nasal cavity from maxillary sinus
Lacrimal groove
From inner corner of eye to maxillary sinus- where tears flow into the nose
Mandible parts
- alveolar process
- body
- ramus
- angle of the mandible
- dividing line between body/ ramus
Mental protuberance
Tip of the chin area
Ramus parts
- condyle
- condylar neck
- Coronoid notch- depression in the ramus
- coronoid process
- external oblique line (ridge)
Mandibular foramen
Lingual surface- nerve/blood supply enters
Mylohyoid line
Lingual surface- attachment for mylohyoid muscle
Sublingual fossae
Depression above mylohyoid line -sublingual gland
Retromolar triangle
Area immediately behind 3rd molars
Genial tubercles
Midline lingual- muscle attachment (bullseye on x-ray)
Lingula
Projection of bone partially covering mandibular foramen- attachment for sphenomandibular ligament
Submandibular fossae
Depression below mylohyoid line - submandibular gland