Anatomical Considerations Flashcards
Which skull bones are involved in administration of local anesthetic?
Maxilla
Palatine
Mandible
What must the dental professional rely on when doing local anesthesia?
Visualization of hard tissues
Palpation of hard tissues for landmarks while injecting patients
Difference between the bone of the maxilla and mandible
Bone of the maxilla is much more porous while the mandible is very solid
Anesthesia tends to be more effective in the maxilla
Which nerve passes through the foramen rotundum?
Maxillary nerve- purely a sensory nerve
Which nerve passes through the foramel ovale/spinosum?
Mandibular nerve- mixed nerve with two roots, sensory and motor
What enters the mandibular foramen and follows through the mandibular canal?
IA nerve, artery and vein
What is responsible for a positive aspiration in the PSA region?
Pterygoid plexus of veins
Large blood supply, frequent positive aspiration
Where is the retromolar triangle located?
Behind the mandibular 3rd molars between the internal and external oblique ridges
Characteristics of the trigeminal nerve
Largest of the 12 cranial nerves
Composed of a small motor root that supplies the MOM and a larger sensory root that supplies skin of face and mucous membrane of the cranial viscera and oral cavity
Which muscles are supplied by the motor fibers of the trigeminal nerve?
Temporalis Messeter Medial/lateral pterygoid Mylohyoid Anterior belly of digastric Tensor tympani Tensor veli palatine (stiffens soft palate)
What are the two palatal foramen?
Greater palatine foramen (and lesser)
Incisive foramen
What are the two mandibular foramen?
Mental foramen
Mandibular foramen
What are the two foramen in the greater wing of the sphenoid bone?
Foramen ovale
Foramen rotundum
What are the three divisions of the trigeminal nerve?
V1- Opthalmic
V2- Maxillary
V3- Mandibular
What are the 4 muscles of mastication?
Tempoalis
Masseter
Medial pterygoid
Lateral pterygoid
