principles mandibles and tmj Flashcards
Pa mandible image criteria
Mandibular ____ and ____ seen without rotation
Entire mandible ____, ____, ____ , and ______ demonstrated
Mid ___ and ____ of mandible should be poorly seen due to superimposed ___ spine
Mandibular rami and body seen without rotation
Entire mandible condyles, rami, body , and mentum demonstrated
Mid body and mentum of mandible shoud be properly seen due to superimposed cervical spine
Pa mandible
Tech-
Anatomy - 2
Ir
Patient 3
Patients ____ and ____ on table
Align _____ perpendicular to table or grid
____ perpendicular to film
Central ray
Cr perpendicular to film exiting _____
Suspend breathing
Tech- 70 KVp 25 mas
Anatomy - mandibular rami and body
Ir 8 x 10 cw
Patient erect, seated, prone
Patients forehead and nose on table
Align msp perpendicular to table or grid
Oml perpendicular to film
Central ray
Cr perpendicular to film exiting acanthion
Suspend breathing
Pa mentum
___ and ____ placed on table or grid
Central ray
Perpendicular to film
Mandibular condyles superimposed by ____ bone
Nose and chin placed on table or grid
Central ray
Perpendicular to film
Mandibular condyles superimposed by petrous bone
Pa axial mandible
In place of regular ____only do one
For mandibular ____
____ and ____ on table
Center tip of ____ to midpoint of film
Central ray
___-___degrees ______ exiting _____
In place of regular pa only do one
For mandibular rami
Forehead and nose on table
Center tip of nose to midpoint of film
Central ray
20-25 degrees cephalad exiting acanthion
Ap oblique mandible.
Position?
Both side done for ______
Tech -
Ir
Atomic structure
Mandibular ___ and ____
____ process
____ process
Symphsis( ______)
Better _____ up, but can do seated , semi supine,semiprone.
Head in true lateral position with _____ line perpendicular to ir-
have patient close mouth and keep teeth together
Extend neck enough so that long axis of mandibular body is ____ with transverse axis of cassette, preventing superimposition of ____
If done tabletop, position cassette so complete body of mandible is positioned on cassette
Adjust rotation of head so area interest is ____ to cassette as follow:
- ramus- keep head in ____ lateral
- body- rotate head ___degrees toward cassette
- symphysis- rotate head ___degrees toward cassette
Central ray
____degrees ____ to pass through mandibular region interest
Axiolateral
Both side done for comparison
Tech - 70-75kvp 25 mas
Ir 8x10 cw
Atomic structure
Mandibular body and ramus
Condylar process
Coronoid process
Symphsis( mentum)
Better standing up, but can do seated , semi supine,semiprone.
Head in true lateral position with interpupillary line perpendicular to ir- have patient close mouth and keep teeth together
Extend neck enough so that long axis of mandibular body is parallel with transverse axis of cassette, preventing superimposition of cspine
If done tabletop, position cassette so complete body of mandible is positioned on cassette
Adjust rotation of head so area interest is parrallel to cassette as follow:
- ramus- keep head in true lateral
- body- rotate head 30 degrees toward cassette
- symphysis- rotate head 45 degrees toward cassette
Central ray
25 degrees cephallic to pass through mandibular region interest
Oblique mandible image criteria
Entire half of mandible from _____ to _____ should not be included
Opposite side of ____ should not be superimposed body
Entire body ,from ____ to ____ of canine tooth) should be well demonstrated
____ process should be visualized
Entire half of mandible from ramus to symphasis should not be included
Opposite side of mandible should not be superimposed body
Entire body ,from angle to reion of canine tooth) should be well demonstrated
Coronoid process should be visualized
Ap towne mandible
If Patient can’t do ___
Patient supine with _____ perpendicular to film
Cr
___-____ in ____ direction to pass between ____ of mandible
Look at _____ process
Patient can’t do pa
Patient supine with oml perpendicular to film
Cr
35-40 caudal to pass between angles of mandible
Look at condylar process
Axiolateral temporomandibular joints( tmj)
Tech -
Ir
Anatomic structures Temporomandibular joint ( \_\_\_\_ to film)
_____ of mandible ( closer to film)
Both tmj’s done for _____
Patient semiprone or seated with ____ side closer to table or vertical grid device
Head in lateral with tmj in midline grid
Place _____ parallel to film
Head places ____ perpendicular to film
Degree of flexion head to place _____ parallel to transverse axis
____ side against film
Central ray
____-____degree ____ anterior and______in superior to upside ____
Degree caudal angulation varies
- brachcephalic ___-_____caudad
- dolicocephalic ___-___caudad
____and _____ mouth with suspend respiration
Tech - 70 KVp 25 mas
8x10 lw
Anatomic structures Temporomandibular joint ( closer to film)
Condyle of mandible ( closer to film)
Both tmj’s done for comparison
Patient semiprone or seated with affected side closer to table or vertical grid device
Head in lateral with tmj in midline grid
Place midsaggital parallel to film
Head places inter pupillary perpendicular to film
Degree of flexion head to place ioml parallel to transverse axis
Interest side against film
Central ray
25-30 degree 1/2 in anterior and 2 in superior to upside eam
Degree caudal angulation varies
- brachcephalic 15-20 caudad
- dolicocephalic 30-35 caudad
Open and closed mouth with suspend respiration
Image criteria axiolateral tmj
_____ should be well demonstrated in center radiograph
For closed mouth, condylar process of mandible be seen _____tm fossa
Open mouth, condylar process of mandible seen ____ to tm fossa and ____articular tubercle
Tmj should be well demonstrated in center radiograph
For closed mouth, condylar process of mandible be seen in tm fossa
Open mouth, condylar process of mandible seen anterior to tm fossa and below articular tubercle
