Paranasal Sinuses Flashcards
What are the 4 paranasal sinuses?
frontal sinus, maxillary sinus, ethmoid air cells, & sphenoid sinus
How many ethmoid air cells are on either side of the face?
7-9
Label
Label the sphenoid bone
Label the sphenoid bone
- Lesser wing
- Body
- Greater wing
- Lateral pterygoid plate
- Medial Pterygoid plate
___ passes through the foramen spinosum
Middle meningeal artery
Label
- Frontal process
- Zygomatic process
- Body
- Alveolar process
- Palatine process
Label
- Frontal process
- Infraorbital margin
- Infraorbital foramen
- Canine fossa
- Zygomatic process
- Incisive fossa
- Canine eminence
- anterior nasal spine
Label
- Frontal process
- Lacrimal groove
- Anterior lacrimal crest
- anterior nasal spine
- Incisive fossa
- Canine eminence
- canine fossa
- Alveolar process
- Alveolar process
- Zygomatic process
- Orbital surface
- Infratemporal surface
- maxillary tuberosity
Label
- Ethmoid crest
- Middle meatus
- Conchal crest
- Inferior meatus
- Maxillary hiatus
- Incisive foramen
- Palatine process
- Maxillary tuberosity
Label
- Frontal process
- Zygomatic process
- Posterior superior alveolar foramen
- Infratemporal surface
- Maxillary tuberosity
- Nasal crest
- Palatine process
Label
- Palatine process
- maxillary tuberosity
- Zygomatic process
Label
- Palatine process
- Frontal process
- Orbital surface
- Infraorbital groove
- Infraorbital canal
- Zygomatic process
Label
- Zygomatic recess
- Infraorbital recess
- alveolar recess
- Orbital margin
What’s the largest paranasal sinus?
Maxillary sinus
Where’s maxillary sinus located? What’s its shape?
Located ENTIRELY within the body of the maxilla
Pyramid shaped (5 sided) w/ 3 recesses
What are the walls of the maxillary sinus?
Posterior
Orbital (superior)
Facial (anterior)
Medial (lateral nasal wall)
Bucco-alveolar (inferior)
Example of Infection that spreads from molar teeth to mucous of maxillary sinus
odontogenic sinusitis
When does the max sinus develop? When does it expand?
Develops embryologically at 10th week of gestation
Expands by 5th month
Neumatizes (has air filled cavities) at birth
Where is the max sinus located in children?
level of palatine & as you grow, they grow apart
Stuffy nose is associated w/ which sinus?
Maxillary
Main functions of the maxillary sinus
- Humidifying & warming inspired air
- Immune defense
- Nitric oxide production
What are the 2 blood supply venous drainages of the max sinus?
Pterygoid venous plexus & Facial vein anteriorly
Infection of the max sinus can spread to
cavernous sinus
What’s inflammation in the maxillary sinus called?
Cavernous sinus thrombosis
What is the sensory, sympathetic and parasympathetic n. supply to the max sinus?
- Sensory: comes from maxillary nerve
- Sympathetic: comes from superior cervical ganglion
- Parasympathetic: comes from sphenopalatine ganglion
In the L medial wall of the max sinus, ___ is in the top half & ___ is in the bottom half
top half = nose
bottom half = palate
What are the branches of the maxillary nerve?
Posterior superior dental branch
Middle superior dental branch
Infraorbital branch
Label
- Crista galli
- Cribiform plate
- Superior nasal concha
- Perpendicular plate
- Middle nasal concha
- Orbital plate
Label
Lateral mass of ethmoid
Label
- Crista galli
- Air cells
- Air cells
- Perpendicular plate
- orbital plate
- Ethmoid bulla
- Middle nasal concha
Label
- Crista galli
- Air cells
- Cribiform plate
- Orbital plate
Label
- Crista galli
- Orbital plate
- Perpendicular plate
- Middle nasal concha
- Air cells
Label
- Crista galli
- Ethmoid bulla
- Uncinate process
- Middle nasal concha
- Superior nasal concha
- Perpendicular palte
Label
- Crista galli
- Perpendicular plate
What makes up the side of the nose?
Nasal septum
Vomer
Perpendicular plate
Label
- Superior nasal concha
- Middle nasal concha
Label
- Ethmoid bulla
- Ucinate process
Label
- Superior nasal concha
- Middle nasal concha
- Perpendicular plate
Symptoms of sinus disease
pain in maxillary teeth
Dental problems causing sinus disease
Endodontic problems/non-vital teeth
Periodontal problems
Dental implant issues
tumor/swelling/neoplasms
Dental structures (root tips, endo filling, implants) displaced into sinus
___ needs alveolar bone implant
Caldwell-luc operation
What is oro-antral fistula? What can it result form?
non-healing, unnatural opening from the sinus into oral cavity
Trauma
Periodontitis
Peri-implantitis
Endodontic disease/necrotic tooth pulp
Bad implant placement
Surgery: extractions, root-end surgery, implants, periodontal flaps