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Clinical 2023 Facial

Facial bones and Parasinuses

QuestionAnswer
What is the largest immoveable bone of the face? Vomer Mandible Maxilla Zygomatic Maxilla
Which facial bone forms the majority of the hard palate? Mandible Maxilla Palatine Zygomatic Maxilla
Which three cranial bones articulate directly with the zygomatic bone? Frontal, ethmoid, temporal Sphenoid, frontal, occipital Frontal, sphenoid, temporal Ethmoid, parietal, frontal Frontal, Sphenoid, Temporal
Which of the following terms describes the junction of the two nasal bones? Nasion Glabella Acanthion Supraorbital groove Nasion
Which of the following structures are described as scroll-like projections found in the nasal cavity? Conchae
Which two bones form the bony nasal septum? Superior and inferior nasal conchae Vomer and maxilla Ethmoid and vomer Sphenoid and ethmoid Ethmoid and Vomer
The upper and lower teeth are embedded in the: symphysis menti palatine processes. condyloid processes. alveolar processes. Aveolar processes
The point of union between both halves of the mandible is termed: Symphysis menti
What primary type of joint movement occurs with the TMJ? Bicondylar
Teeth and Maxilla are classified as which joint? Fibrous
Posterior aspect of the orbit is termed: Apex
How many facial bones help make the bony orbit? Four lacrimal zygoma maxilla palatine
What is the only paranasal sinus not contained within a cranial bone? Maxillary Ethmoid Sphenoid Frontal Maxillary
Antrum of Highmore is an older term for: Maxillary sinuses
Which bone is involved with a tripod fracture? Maxilla Temporal Ethmoid Zygomatic Zygomatic
A fracture involving the facial bones where a blow to one side causes a fracture to the opposite side is termed a ____ fracture. tripod Le Fort blow-out contrecoup Conrecoup
The lateral projection of the facial bones is typically a unilateral projection. True or False True
For a lateral facial bones projection, the chin should be adjusted so the IOML is perpendicular to the front edge of the IR. True or False True
Where is the CR centered for a lateral projection of the facial bones? Outer canthus Midway between the glabella and the EAM Acanthion Zygoma, midway between the EAM and the outer canthus Zygoma, midway between the EAM and outer canthus
What is the angle between the OML and the plane of the image receptor for the parietoacanthial (Waters) projection? 40° 42° 37° 15° to 20° 37°
Which positioning line is placed perpendicular to the plane of the image receptor for the parietoacanthial projection? Mentomeatal Lips-meatal Orbitmeatal Acanthiomeatal Mentomeatal
The modified parietoacanthial (modified Waters) projection requires more extension of the head and neck as compared with the parietoacanthial (Waters) projection. True or False False
The 15° PA axial (Caldwell) projection produces an unobstructed view of the maxilla. True or False False
Where does the CR exit for a modified parietoacanthial (Modified waters) projection of the facial bones? Nasion Glabella Acanthion Midorbits Acanthion
Which positioning line is placed perpendicular to the plane of the image receptor with a true lateral nasal bone projection? OML AML Interpupillary Midsagittal Interpupillary
Which projections will best demonstrate the bony nasal septum? Parietoacanthial Lateral nasal bone AP axial projection Lateral facial bone Parietoacanthial
The lateral projection for the nasal bones is generally a unilateral projection. (Both right and left lateral projections are usually not required.) True or False False
The CR must be placed parallel to the ____ positioning line for the superoinferior (tangential) projection of nasal bones. Glabellomeatal Mentomeatal Lips-meatal Glabelloaveolar Glabelloaveolar
Which projection of the mandible results in the greatest thyroid dose? Submentovertex
Which positioning line is parallel to the image receptor for the oblique inferosuperior (tangential) projection of the zygomatic arches? Midsagittal plane Orbitomeatal Infraorbitomeatal Glabelloalveolar Infraorbitomeatal
Which projection best demonstrates the floor of the orbits? Parietoacanthial (Waters) PA axial (Caldwell) Modified parietoacanthial (modified Waters) Lateral facial bones Modified parietoacanthial (Modified waters)
Which positioning line must be used with a 30° caudad angle for an AP axial projection of zygomatic arches? IOML OML AML GAL OML
What is the angle between the midsagittal plane and the image receptor for a parieto-orbital oblique projection of the optic foramen? 45° 30° 12° 53° 53°
Which positioning line is placed perpendicular to the image receptor for the parieto-orbital oblique projection of the optic foramina? OML MML AML IOML AML
What is the maximum CR angulation used for the axiolateral oblique projection of the mandible? 10° to 15° 30° 25° 45° 25°
How much skull rotation (from a lateral position) is required to place the ramus parallel to the image receptor for the axiolateral oblique projection of the mandible? None (keep skull in lateral position) 45° 30° 53° None (keep skull in lateral position)
Why is the chin extended for an axiolateral oblique projection of the mandible? To open up the TMJ To prevent superimposition upon the cervical spine To profile the condylar process To better visualize the mentum To prevent superimposition upon the cervical spine
Where does the CR exit for a PA axial projection of the mandible? Junction of the lips Mentum Nasion Acanthion Acanthion
Which positioning line is perpendicular to the image receptor for a PA projection of the mandible? OML IOML AML GAL OML
Which aspect of the mandible is best demonstrated with an AP axial projection? Condyloid process
Where is the CR centered for an AP axial of the mandible? At the nasion At the glabella 2 inches (5 cm) above glabella At the mentum At the glabella
Which projection will best demonstrate the entire mandible with one exposure? AP axial Axiolateral Submentovertex Tomography Submentovertex
What CR angle is required for the AP axial projection for the temporomandibular joints (TMJs) with the IOML perpendicular to the image receptor? 30° 25° 37° 42° 42°
The modified Law method for TMJ requires a ____° rotation of the skull and a ____° angle of the CR. 15;15 10;15 5;0 0; 25 to 30 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? None; the CR should be perpendicular to the film. 15° caudad 25° to 30° caudad 20° to 25° cephalad 25° to 30° caudad
Where is the CR for lateral projection of the sinuses? Upside EAM (side away from image receptor) Midway between the acanthion and the EAM At the level of the nasion Midway between the outer canthus and the EAM Midway between the outer canthus and the EAM
Which sinuses are best demonstrated with PA projection? Maxillary & Sphenoid Frontal & Ethmoid Sphenoid & Ethmoid Frontal & Maxillary Frontal & Ethmoid
Which sinuses are best seen with parietoacanthial projection? Maxillary Frontal, maxillary, and ethmoid Frontal and maxillary Sphenoid and maxillary Maxillary
Which sinus is projected through the oral cavity with a parietoacanthial transoral projection? Ethmoid Maxillary Sphenoid Frontal Sphenoid
A radiograph of a lateral projection of the facial bones reveals that the mandibular rami are not superimposed. What specific positioning error is present on this radiograph? Rotation
Which of the following positions demonstrates all the paranasal sinuses? Parietoancanthial PA axial Lateral True PA Lateral
Which of the following projections can be used to demonstrate the pathology of the zygomatic arch? 1. SMV 2. Oblique inferiorsuperior tangential projection 3. PA axial caldwell 1 & 2
Lateral deviation of the nasal septum may be best demonstrated in the: Lateral projection PA axial (Caldwell method) Parietoacanthial (Waters method) AP axial (Towne method) Parietoacanthial (Waters method)
Which of the following statements is true about PA axial projection of the paranasal sinuses? 1. OML elevated 15 degrees from horizontal 2. Petrous pyramids completely fill orbits 3. the frontal and ethmoid sinuses visualized 1 & 3
Which of the following is not a facial bone? Lacrimal bone Mandible Vomer Middle nasal conchae Middle nasal Conchae
List the four processes of the Maxilla Frontal Zygomatic Palatine Aveolar
Which of the soft tissue is at the base of the anterior nasal spine? Acanthion
Which facial bone form the posterior aspect of the hard palatine? Palatine bone
Which two cranial bones articulate with the maxilla? Frontal & Ethmoid
Which of the following does not articulate with the zygomatic bone? Mandible
Which facial bone articulates with the tear ducts? Lacrimal
A deviated nose septum is most likely to occur in the ________ and ________. Septal cartilage and vomer
Which of the facial bone openings is formed by a cleft between the greater and lesser wings of the sphenoid bone? Superior orbital fissure
The drainage pathway for the paranasal sinuses is called the: Ostiomeatal complex
Another term for the second cranial nerve? Optic nerve
the frontal sinuses rarely become aerated before the age of 6
What is the name of the passageway between the maxillary sinuses and middle nasal meatus? Infundibulum
Facial bones should always be performed recumbent? True or False False
Name the fracture that results from a direct blow to the orbit leading to a disruption to the inferior orbital margin? Blow out fracture
"Free-floating" zygomatic bone is known as which fracture: Tripod fracture
What is the major disadvantage of performing a straight PA projection for Facial bones, with NO CR angulation or neck extention as compared to other PA facial bone projections? Dense petrous pyramids
Where is the CR centered for a lateral position for the facial bones? Zygoma
What facial bone structures are demonstrated with the Parietoacanthial projection? Orbits, infraorbital rims, bony nasal septum, maxillae, zygomatic bone and arches
What CR angle is used in PA axial to demonstrate the petrous ridges below the orbital floor? 30 degrees
Why are facial bones performed PA rather than AP: Reduces OID of facial bones Reduces exposure to anterior facial bones/structures such as thyroid gland
CR lateral projection for cranium is: 2 inches above EAM, IR landscape
CR lateral projection for facial bones: Zygoma, IR portait
CR exit for a parietoacanthial (waters) for facial bones: Acanthion
CR exit for a 15 dergee PA axial for facial bones is: Nasion
CR for Modified Parietoacanthial (waters) requires that the ___________ line is perp to the IR, which places the OML at a _______ degree. Lipsmeatal line, 55 degrees
CR centered for the AP axial projection for the zygomatic arches? 1 inch superior to Glabella to pass thru mid arches at the level of gonion
Which specific facial bone structures are best demonstrates with the SMV projection if the correct exposure factors are used. Zygomatic arches
Proper method for Parieto-orbital projection for Optic foramen Rheese method & 3 point landing
PA axial projection of the mandible produces an elongated view of the condyloid process True or False True
Which projection of the mandible projects the opposite half of the mandible away from the side of interest? Axial Lateral Oblique
Where should the CR exit for a PA axial projection of the Mandible? Acanthion
Which cranial positioning line is placed perp to the IR for a PA or PA Axial projection of the mandible? OML
Which aspect of the mandible is visualized with an AP axial projection of the mandible? Condyloid process
Which projection or method of the TMJ requires that the skull be kept in a true lateral position? Schuller (25 to 30 degrees caudad)
Which group of paranasal sinuses is best demonstrated with the Parietoacanthial waters projection? OML forms a ________ degree angle Maxillary, 37 degree angle
Which sinus often produces an air/fluid level indicating a basilar skull fracture? sphenoid
Which projection will best demonstrate the entire mandible with one exposure? smv
Where does the CR exit for a PA axial projection of the mandible? acanthion
What CR angle is required for the AP axial projection for the temporomandibular joints (TMJs) with the IOML perpendicular to the image receptor? 42
What is the maximum CR angulation used for the axiolateral oblique projection of the mandible? 25
Which of the following projections are taken to demonstrate the TMJ's Open and closed mouth lateral (Law) projection
Created by: kevincan
 

 



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