RTech 66 Midterm Facial bones
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38 terms
Terms | Definitions |
|---|---|
 How many facial bones are there?How many paired bones? How many individual bones? | 14 facial bones 6 paired - nasal, lacrimal, maxilla, zygoma, I.N.C, 2 individuals - Mandible & Vomer |
| What are the smallest and thinnest bones? Where are the lacrimal bones found? Whats the opening on the (bottom inferior portion) edial wall of orbit? | Nasal & Lacrimal bones In the orbits lacrimal duct / tear duct |
| What is attached to the medial walls of the maxilla & extend into the nasal cavity? | Inferior nasal conchae *they are by themselves** |
| Where are the superior & middle nasal conchae located? What is the purpose for the inferior nasal conchae? What forms the bony hard palate? | Ethmoid bone Warm, cleanse & moisten inhaled air Palatine process of maxilla & horizontal plate palatine bone |
| Where are the palatine bones seen? What are the 2 portions of the palatine bone? | In posterior hard palate (roof of mouth) & dot in the orbits horizontal plate & Perp/vertical plate FYI: Horizontal portion of the palatine forms the posterior portion of the bony hard palate. Perp/vertical plate is seen in orbits |
| What are the 2 names for the Zygoma? What are the zygoma processes? | Malar & Prominence of cheek Temporal process Maxillary Process Frontal process |
| What type of fx occurs in the zygoma? What happens? | Tripod Fx The zygoma separates from the 3 process and is free floating |
| What part of the orbit does the zygoma form? | Lateral orbital walls (Also forms part of the floor of the orbit) |
| What are the 2 largest immovable facial bones? What is its aka name? | Maxillae "anchor of face" |
| The maxillary bones articulates with all facial bones except? What are the 4 processes of the maxillae? | Mandible Frontal - Zygoma - Palatine - Alveolar= processes of maxillae |
| What is found in the body of the maxillae? The roof of the maxillae forms what? | Maxillary sinuses Floor of orbits |
| Why is the roof of the maxillary bone so thin? | So when the eye ball is compressed due to trauma, the eye ball can fall into the maxillary sinuses. |
| What forms the Zygomatic arch? What shape is the vomer? | Zygomatic Process of the temporal bone & Temporal process of the Zygomatic bone Plow shape - Triangular |
| Why does the vomer go back into the head? What forms the bony nasal septum? | Protect vomer from breaking. Vomer & perp plate of ethmoid bone |
| What happens when the vomer & perp plate of ethmoid Separates from each other? | Deviated bony nasal septum |
| What type of joint is the TMJ? What forms the TMJ? | Synovial Mandibular condyle & mandibular fossa of temporal bone |
| What is the name of the head of the mandible? What does the mandibular condyle fit into? Where is the mandibular fossa found? | Mandibular condyle Mandibular fossa On the temporal bone |
| Whats the purpose for the bumps inside the mandible on the mentum? What is the name of these bumps? | Holds the frenulum Genial tubercles |
| What hole is on the inside of the mandibular rami? What hole is on the body of mandible? | Mandibular foramen (inside of rami) Mental foramen (on mentum) |
| What is the ridge of bone that runs down the canal? What is the s-shaped projection of bone at the ending of the ridge that protects the mylohyoid vessels & nerves? | Mylohyoid ridge Lingula of mandible (There is also a sphenoidal lingual) |
| What's the name of the suture that fuses in 1 yr olds? What is the projection right below the symphsis menti? What is the center of the mental protuberance? | Symphysis menti Mental protuberance Mental point |
| From lateral body to mid lateral body is called? What is the U-shape on the mandible? The mandibular notch is anterior to what? | Mentum Mandibular notch Condyle |
| The mandibular notch is posterior to what? What process fits under the Zygomatic notch? | Coronoid process Coronoid process |
| Nasal bones meet the frontal bone. What is this point? Fissure is located at the nasion unless what? | Nasion Deviated nasal septum |
| Lacrimal bones form what part of orbits? | Medial border of orbits next to frontal process of maxillae |
| What facial bones form the 3 facial cavities? What are the 3 cavities the maxilla forms? | Maxilla Later wall of nose, floor & medial wall of orbits & roof of mouth Nose, roof of mouth, orbits |
| What is the most important cavity? | Orbits. Because of the damage that could be done to the eye. |
| What are the 2 cavities located inside the maxillary? The 2 maxillary bones meet at the alveolar ridge and form a bony projection called? | Maxillary sinuses Anterior nasal spine |
| What is the surface landmark that corresponds to the anterior nasal spine? | Acanthion |
| Where does the "blow out" fracture occur? | Maxillary (The floor of the orbit; the floor is displaced inferiorly; can be seen in Modified Waters for facial bones or exaggerated Caldwell (30) for orbits) Contents of eye is pushed back into the apex of the cone shaped orbital canal. |
| What is it called when the suture joining the right and left palatine process of maxillae does not close near the alveolar ridge? | Cleft palate It leaves a hole in the roof of the mouth & up into the lip |
| What is another name for the inferior nasal conchae? | Turbinates. They come off lateral wall of nasal bone |
| What are the 4 openings in the orbits? | Superior orbital fissure Inferior orbital fissure Optic canal Lacrimal duct |
| Orbits Coned shape Apex back of head base formed by SOM/LOM/IOM/ & MOM | Roof = frontal Medial wall = ethmoid & lacrimal Lateral = zygoma & sphenoid Floor = maxillae (zygoma) |
| **Know pic of orbit** know them 3 cranial frontal ethmoid sphenoid Facial Zygo Max pala lacrimal | Orbital angles **know these angles** Long axis is directed from lateral to medial at a 37 degree angle with msp (from base to apex) - Optic canal forms a 30 degree upward angle with oml |
| Orbital openings - Superior orbital fissure made by lesser & greater wings of sphenoid Inferior orbital fissure made by the sphenoid & max bone & zygoma at anterior region | Optic foramen is the passage opening into the apex of the orbit for the optic nerve & ophthalmic artery Sphenoid strut holds nerves & arteries. |
| Lat, Pa Axillary - Caldwell Parietocanthial or Acanthoparietal ( waters, rev waters) modified waters 8x10 LW in bucky | 8x10 LW 0 degrees IPL perp to IR CR per to IR Lateral Ioml .. bottom edge per to top e Cr prominence of cheek Ipl per to IR IOML // transcerse axis & per to front edge |
| Check for tilt orbital plates rotation condyles of mandible | Smallest bone in orbit - palatine bone Outercanthus of upside orbit - what is entrance orbitalparietal proj. what attaches to the frenulum - genial tubercles what fits under the zygo arch coronoid process |
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