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Facial and Sinus
Rotation review
| Question | Answer |
|---|---|
| Which of the following bones is not a facial bone? (middle nasal conche, vomer, lacrimal bone, mandible) | Middle nasal conchae |
| What is the largest immovable bone of the face? | Maxillae |
| List the four processes of the maxilla | Frontal, alveolar, zygomatic, palatine |
| Of the four processes of the maxilla which one is most superior | Frontal |
| Which soft tissue landmark is found at the base of the anterior nasal spine | Acanthion |
| Which facial bones form the posterior aspect of the hard palate | Horizontal portion of palatine |
| Which two cranial bones articulate with the maxilla | Frontal and ethmoid |
| Which facial bones are sometimes called the "cheek bones" | Zygomatic |
| Process that supports the upper teeth is the | Alveolar process |
| Which facial bone forms majority of the hard palate | Maxille |
| Each zygoma articulates with ___ crainal bones (____,_____) and with ___ facial bone (_____) | 2 (frontal and temporal), 1 (maxilla) |
| What two bones form the bony nasal septum | ethmoid and vomer |
| The lower teeth are rooted in the madible in what process that extends along the entire superior portion of the body of the mandible | alveolar process |
| Only sinus that are part of the facial bone structure | Maxillary sinus |
| What sinuses develop last | Ethmoid sinuses |
| Older term for maxillary sinus is ____, an abbreviation for ________ | antrum, antrum of highmore |
| The ______ sinuses are contained within the lateral masses or labyrinths of the ethmoid bone | ethmoid |
| The large maxillary sinus drains through the _____ passageway down through the middle nasal meatus and inferior nasal meatus | Infundibulum |
| The posterior poriton of the cone, the apex, corresponds to the ______, through which the optic nerve passes | optic foramen |
| Seven bones make up each orbit, ____ cranial boens and ____ facial bones. | 3, 4 |
| What three cranial bones make up the orbit | Frontal, ethmoid, and sphenoid |
| Where are the ethmoid sinuses located within the ethmoid bone | Lateral masses |
| Which bone is involved with a tripod fracture | Zygomatic |
| Which of the following modalities should be used to evaluate a possible neoplasm involving the zygomatic and maxilla bones on a PT. working in an industrial metal fabrication plant | CT |
| Where is the CR centered for a lateral projection of the facial bones | Zygoma, midway between the EAM and the outer canthus |
| What is the angle between the OML and the plane of the IR for a parietonacanthial (Waters) projection | 37 degrees |
| Which positioning line is place perpendicular to the plane of the IR for the parietoacanthial (Waters) projection | Mentomeatal |
| Where does the CR exit for a modified parietoacanthial (mod waters) projeciton of the facial bones | Acanthion |
| Which of the following projections will best demo the bony nasal septum | Parietoacanthial |
| (T/F) The lateral projection for the nasal bones is generally a unilateral projection. (Both RT and LT lateral projections are usually not required) | False |
| What can the tech do if the Pt. cannot extend the head and neck adequately for the routine submentovertex projection of the zygomatic arches | Angle the CR to place it perpendicular to the IOML |
| Which of the following technical factors do not apply to lateral nasal bone projections | The Tech should not use AEC, The Tech should use a small focal spot, The Tech should use low to med. kV. |
| Which positioning line is placed perpendicular to the plane of the IR with a true lateral nasal bone projection | Interpupillary |
| The CR must be placed parallel to the ___ positioning line for the superoinferior (tangential) projection of nasal bones | glabelloalveolar |
| Which of the following points is not true about the oblique inferosuperior (tangential) projection of the zygomatic arches | A grid must be used |
| Which projection best demonstrates the floor of the orbits | Modified parietoacanthial (modified waters) |
| Which positioning line must be used with a 30 degree caudad angle for an AP axial projection of zygomatic arches | OML |
| What is the angle between the midsagittal plane and the IR for a parieto-orbital oblique projection of the optic foramen | 53 degrees |
| Which positioning line is placed perpendicular to the IR for the parieto-orbital oblique projection of the optic foramina | AML |
| What is the maximum CR angulation used for the axiolateral oblique projection of the mandible | 25 degrees |
| Why is the chin extended for an axiolateral oblique projection of the mandible | To prevent superimposition upon the cervical spine |
| The modified law method for TMJ requires a ____ degree rotation of the skull and a ___ angle of the CR | 15:15 |
| What is the position of the skull for an axiolateral projection (Schuller method) of the TMJs | True lateral position |
| What CR angle is required for the Schuller method projection of the TMJs | 25 to 30 degree caudad |
| Sit: A radiograph of a lateral projection of the facial bones reveals that the mandibular rami are not superimposed. What positioning error is present | Rotation |
| Sit: A radiograph of a parietoacanthial (waters) projection reveals that the petrous ridges are superimposed over the lower 30% of the maxillary sinuses. What specific positioning error (if any) led to this | Insufficient extension |
| Sit: A radiograph of a parieto-orbital oblique projection for the optic foramen reveals that the optic foramen is projected into the inferior, outer orbital rim. Which modifiction is needed to make it diagnostic? | Decrease the extension of the head and neck |
| Sit: A radiograph of an axiolateral oblique projection of the mandible with the head in a lateral position reveals that the mandibular body is greatly foreshortened. Which modifications is needed to make it diagnostic | Increase the rotation of skull toward the IR |
| Sit: A patient enters the ER with facial bone injuries. The physician is concerned about a possible blow-out fracture of the left orbit. Which three projections would bet diagnose the injury | Modified parietoacanthial, 30 degree PA facial bone, and lateral facial bone projections |
| Sit: A patient enters the ER with a possible nasal bone fracture. The physician is concerned about a possible bony nasal septum deviation and fractured nasal bones. Which routine would best diagnose these injuries | Parietoacanthial,Lateral nasal bone, and superoinferior (axial) projections |
| A patient enters the ER with a possible fracture of the right zygomatic arch. Which of the following routines would best diagnose a possible fracture of this structure | Submentovertex, bilateral oblique infersuperior (tangential), and AP axial projections |
| Sit: A radiograph of a PA projection of the sinuses reveals that the petrous ridges are projected over the ethmoid sinuses. Which of the following mods will eliminate this superimposition while not compromising diagnostic quality | Increase extension of the head and neck slightly |
| How is the CR aligned for the acanthiomeatal (reverse Waters) projection for the facial bones? | Parallel to the mentomeatal line |
Created by:
Joker71
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