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Facial Bones
Bontrager Ch 11
| WTF is this? | No Shit Sherlock |
|---|---|
| Largest IMMOVABLE bone of face? | Maxilla |
| Largest Movable bone of face? | Mandible |
| 14 Facial Bones | 2 Maxilla, 2 Zygoma, 2 Nasal, 2 Inf Nasal Conchae, 2 Palatine, 2 Lacrimal, 1 Vomer, 1 Mandible |
| 4 Processes of Maxilla | Frontal, Zygomatic, Alveolar, Palatine Processes |
| Inferior margin of Maxilla is __, it unites with __ ? | Alveolar Process with Teeth |
| What forms the anterior portion of the hard palate? | Palatine Processes of Maxillae |
| What forms the posterior portion of the hard palate? | Palatine Bones (horizontal portions) |
| __ is a Congenital birth defect, opening btwn __ bones due to incomplete fusion? | Cleft Palate, Palatine Processes |
| What small, delicate bone forms the medial side of each orbit? | Lacrimal Bone |
| Superior & Middle Nasal Conchae are part of what bone? | Ethmoid |
| __ project from lateral walls of nasal cavity to warm & clean air before it enters the lung? | Nasal Conchae (turbinates) |
| Which bone joins the Vomer to form the Bony Nasal Septum? | Perpendicular Plate of Ethmoid |
| Any SMV Projection has Mandibular Condyles (Posterior/Anterior) to Petrous Ridges? | Anterior |
| On SMV, how do you correct for Mandible superimposing Petrous Ridges or visible Frontal bone? | Tilt back more (Insufficient Extension) |
| PA Transoral Waters for Sinuses has __ Ʇ to IR? CR Exits __ ? | MML Ʇ, Exit Acanthion |
| What projection demonstrates Sphenoid Sinuses within the oral cavity? | PA Transoral (Open Mouth Waters) |
| AP Axial (Modified Towne) for TMJ has __ Ʇ to IR? CR and tube angle? | CR 35° Caudal w OML Ʇ to IR, 3" ↑ Nasion |
| LAT Facial bones has __ Ʇ to IR? CR? | IPL Ʇ to IR, CR to Zygoma |
| Radiograph of LAT Facial bones with skull clipped MUST be repeated (T/F)? | False- Facial bones only |
| Technical name for Waters projection? | Parietoacanthial |
| Parietoacanthial projection has __ Ʇ to IR? CR? | Waters- MML Ʇ to IR, Exit Acanthion |
| Parietoacanthial places what landmark where? | Waters- Petrous Ridges ↓ Maxillary Sinuses |
| Routine Facial Bone projections? | LAT, Parietoacanthial (Waters), PA Axial (Caldwell) |
| Modified Waters for Facial bones has __ Ʇ to IR? CR? | Mod Waters- LML Ʇ to IR, Exit Acantion |
| What projection puts the Petrous Ridges in the lower 1/3 of Maxillary Sinuses? | Mod Parietoacanthial (Mod Waters) |
| Technical name for Caldwell projection? | PA Axial |
| PA Axial projection has __ Ʇ to IR? CR and tube angle? | Caldwell- CR 15° Caudal w OML Ʇ to IR, Exit Nasion |
| What projection puts the Petrous Ridges in the lower 1/3 of the Orbits? | PA Axial (Caldwell) |
| What projection should you do for Orbital Floors? | PA 30° Caudal |
| LAT Nasal Bones has __ Ʇ to IR? CR? Bucky? | CR 1/2" ↓ Nasion, IPL Ʇ to IR, TT |
| Superoinferior Axial for Nasal bones CR & relevant lines? | CR to Nasion w GAL Ʇ to IR, CR parallel to GAL |
| At what age do the 2 Mandible bones fuse? Where? | 1 year @ Symphysis Menti |
| Mental __ is the triangular area below the symphysis, while Mental __ is it's center? | Mental Protuberence, Mental Point (center) |
| This process at the anterior end of the mandibular notch is not an articulation? | Coronoid Process |
| This posterior process of the ramus forms the TMJ? | Condyloid Process |
| Which projection shows the mentum, body, gonion, ramus, coronoid process & condyle of the Mandible? | SMV |
| On a Mandibular SMV, the Condyle projects (Medial/Lateral) and the Coronoid Process projects (Medial/Lateral)? | Condyle Medially - Coronoid Laterally |
| What joint types allow for the (1) side to side & (2) open movements of the Mandible? | Gliding & Hinge |
| When the mouth is OPEN the Condyle is IN the Tempromandibular Fossa? (T/F) | False- Closed is IN |
| The Orbit projects __° superior & __° medial? | 30° Superior, 37° Medial |
| Joint classification for Alveolar Processes & teeth? | Fibrous, Synarthrodial |
| The Orbit is oriented with outer rim (Apex/Base), while the (Apex/Base) is posterior by Optic Foramen? | Base, Apex |
| Which bones form the circular Base of the Orbit? | Frontal, Maxillary, Zygomatic |
| What 7 bones make up the Orbit? | Frontal, Zygomatic, Maxillary, Lacrimal, Ethmoid, Sphenoid, Palatine |
| Most medial opening of the Orbit is a passage for the optic nerve? | Optic Foramen |
| Orbital opening btwn greater & lesser wings of Sphenoid? | Superior Orbital Fissure |
| Orbital opening btwn Maxilla & Zygomatic? | Inferior Orbital Fissure |
| Enlargement of the optic nerve can cause erosion of this bridge of bone? | Sphenoid Strut |
| OBL Inferosuperior (Tangential) for Arches has __ parallel to IR? Part position? | IOML parallel to IR, 15° Rotate AND Tilt |
| AP Axial (Towne) for Arches has __ Ʇ to IR? CR and tube angle? | CR 30° Caudal w OML Ʇ to IR, 1" ↑ Glabella |
| Technical name for Rhese (3 point landing)? | Parietoorbital Oblique |
| Parietoorbital OBL has __ Ʇ to IR? CR and tube angle? | Chin, Cheek, Nose puts AML Ʇ to IR (MSP 37° ) |
| Axiolateral OBL for Mandible has __ parallel to the IR? CR + Tilt =__° ? | CR to area of interest parallel to IR, 25° Cephalic |
| Axiolateral OBL for Mandible w 0° (True LAT) is for __? 10°-15° Rotation for __? | True LAT Ramus, General Survey (10-15°) |
| Axiolateral OBL for Mandible w 45° rotation is for __? 30° rotation for __? | Mentum (45°), Body (30°) |
| PA for Mandible has __ Ʇ to IR? CR? | PA- OML Ʇ to IR, Exit Lips |
| PA Axial for Mandible has __ Ʇ to IR? CR and tube angle? | CR 20-25° Cephalic w OML Ʇ to IR, Exit Acanthion |
| Rami & Body best demonstrated with __? TMJ & Condyler heads best demonstrated with __? | PA (rami/body), PA Axial (TMJ) |
| AP Axial (Towne) for Mandible has __ Ʇ to IR? CR and tube angle? | CR 35° Caudal w OML Ʇ to IR, @ Glabella |
| What is the alternative for AP Axial (Towne) if patient can't tuck chin for OML Ʇ? | CR 42° Caudal w IOML Ʇ |
| For Panorex, what are fixed in position? Where is the IOML? | CR, SID, IR fixed, IOML parallel to floor |
| All sinuses develop in fetus, but only __ have definite cavity at birth? | Maxillary |
| __ & __ are visible by 6 or 7, while __ develop by late teenage years? | Frontal & Sphenoid, Ethmoid latest forming |
| Which sinuses have a close relationship with roots of teeth? An older term for these sinuses? | Maxillary, Antrum of Highmore |
| ETHMOID sinuses are larger in men than women? (T/F) | False- Frontal larger in men |
| __ is when a basal skull fracture has caused blood to pool within the skull? | Sphenoid Effusion |
| Maxillary sinuses drain first into the __, then __, to __? | Max→Infundibulum→Middle Nasal Meatus→Inferior Nasal Meatus |
| Frontal & Ethmoid sinuses drain first into the __, to __, to __? | F/Eth→Ethmoid Bulla→Middle Nasal Meatus→Inferior Nasal Meatus |
| Where/How do the sinuses intercommunicate? | Osteomeatal Complex |
| __ is an infection caused by blockage of the Osteomeatal Complex? | Sinusitis |
| LAT sinuses has __ Ʇ to IR? CR? | IPL Ʇ to IR, CR btwn Outer Canthus & EAM |
| What projection best demonstrates all 4 sinuses? | LAT Sinuses |
| PA Caldwell for Sinuses has __ Ʇ to IR? CR? Part position? | OML Ʇ to IR, head tilt 15°, Exit Nasion (OML ends 15° from horz) |
| Axiolateral OBL (mod Law) for TMJ CR? Tube angle? Pt position? | CR 15° Caudal, Rot 15° to IR, 1.5" ↑ EAM (15 is the Law) |
| Axiolateral TMJ (Schuller) CR & tube angle? | CR 25-30° Caudal, 2" ↑ & 1/2" Anterior EAM |
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RadTechTKD
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