Transcript Zygomatic Arch ,Nasal bones

Zygomatic Arches
6 5 2014
Jug Handle View
R
Zygomatic Arches- SMV (jughandle view)
R
Note technique
considerably
reduced!
Temporal
process of
zygoma
Zygomatic arch
zygomatic
process of
temporal bone
Note difference in technique between SMV - skull and
SMV - zygomatic arch
A
B
Zygomatic arches- SMV
• Similar to position for
skull or sinus SMV
• CR perpendicular to
IOML,between arches,
1” posterior to outer
canthus
• Tilt image receptor if
possible
Zygomatic arches- SMV
Evaluation Criteria
• No rotation of
head
• Arches free from
superimposition
of overlying
structures
• Arches
symmetric
• Arches not
burned out
You make the Call!
R
Depression
fx. Left
zygomatic
arch
What do you do when you get a patient with flat
cheekbones or depression fx. ?
R
Single
Zygomatic
Arch –
tangential
projection
Single Zygomatic Arch -tangential projection
L
R
L
Single Zygomatic Arch-Tangential projection
• CR to side of interest,
perp. To IOML
• Tilt top of head 15
degrees away from
side of interest
• ? Rotate midsagital
plane15 degrees
towards side of
interest
• Bilateral
Single Zygomatic Arch
Tangential projection
Zygomatic Arches-AP Axial
 Occipital
 Mandible
 Zygomatic
arch
 Mandible
Zygomatic Arch-AP Axial
Similar to
Towne, except:
CR enters at
glabella
instead of 2”
above
CR 30 deg.
Caudad to
OML
Nasal bones
Paired bones making up superior bony wall of nasal cavity –
bridge of nose
Along with lacrimal bones, thinnest and most fragile
bones of entire human body !!
Nasal Bones
Lateral Nasal bones
R
A
Naso-frontal suture
(nasion)
B
Nasal bone
C
Anterior nasal spine
Projections for Nasal Series
• Lateral
• Waters
• Tangential?
Nasal bones-lateral projection
•
L
2 exposures
on one film?
(No longeralgorithm can’t
process on digital)
R
X
•
8x10
lengthwise
•
CR
perpendicular
to bridge of
nose, 1/2”
distal to
nasion
•
Close
collimation
Nasal bones-lateral projection
Nasal Bones-Parieto-acanthial projection
R
• Demonstrates
displacement of
bony nasal septum
(Vomer and perp. Plate of
ethmoid)
• depressed fx’s of
nasal wings
Nasal bones- Tangential projection
skulls 033a.jpg
Doesn’t work well on children, large foreheads, protruding front teeth, concave faces
Nasal Bones-Tangential projection