Ds2102 Practical Qs Flashcards
What makes up the skeleton of the external Nose
Nasal Bones
maxilla
Frontal bone
5 cartilages
(2 lateral, 2alar, 1 septal)
What structure of the nose is responsible for the variances in shape of individuals noses
The cartilages
what makes up the nasal septum
Perpendicular plate of ethmoid
vomer
septal cartilage
What is a rhinorrhea
Leakage of CSF from the subarachnoid space above the ethmoid bone. THis occurs due to bone fracture and and increase the risk of meningitis
what structures bound the nasal cavities (Ant, Post)
Anteriorly: Nares
Posteriorly: Choanae
What structure separates the nasal cavity from the nasal pharynx
Choanae
what is the only space not lined with nasal mucosa in the nasal cavity
Vestibule
what are the arteries that supply the nasal cavity
sphenopalatine artery
posterior ehtmodial arteries
greater palatine artery
superior labial arteries
lateral nasal branches of the facial artery
what is formed in the anterior portion of the nasal cavity by the arteries of the nasal cavity
Anastomosis known as kisselbachs area
what are the main veins that drain the nasal cavity
Spenopalatine, facial and ophthalmic veins
describe the innervation of the nasal cavity
Nasopalatine nerve
Greater palatine nerve
Ant/post Ethmoidal nerves
name 5 openings/ foramina of the orbit
Optic canal
Superior orbital fissure
Inferior orbital fissure
Eithmoidal foramina
Supraorbital notch
Nasolacrimal canal
Describe the significance of the zygomatic buttress to LA and specifically what teeth this impacts?
How can you properly anaesthetize these teeth/tooth?
Thick plate of cortical bone decreases the diffusion towards the B roots of the first permanent molar.
Solution needs to be deposited Medally and Distally
what nerves are involved in brachiomotor
5,7,9,10
what nerves are somatic motor
3,4,6,11,12
what type of joint is a suture
Fibrous joint “syndomosis”
Describe the innervation of the scalp
Ant: V1
Temporal region V2,v3
Post, C2,C3
What are risk factors for canadiasis
Hiv, Diabetes, Immunocompromised, Antibiotic use
targets of Antibacterials
cell wall
dna synthesis
Protien synthesis
Cell membrane
how do beta lactams exert their effect
Inhibited the production of peptidoglycan
why are tetracyclines not recommended for children under 12
Staining of teeth, as well as hypoplasia of developing teeth.
What are common Antibacterials that produce their effects via protein synthesis inhibition
Tetracyclines, clindamycin
why is adrenaline important in LA
Acts as a vasoconstrictor and keeps the effects of the LA localized
