X-RAY OF TM JOINT
X-ray TM joint Axiolateral Open and Close Mouth
TM joint Axiolateral (Open and Close,
Schuller)
Region
temporomandibular
joint, mandibular
fossa, mandibular
condyle
Pathology
dysfunction of temporomandibular
joint
SID: 100 cm (40 inches)
Central Ray: Project 25°~30° caudad toward 5 cm (2 inches) above and 1.3 cm (0.5 inches) anterior to the opposite external auditory meatus (EAM) of the filming side
Respiration: suspended
Position:
1. The patient is either in an erect
position or in a semi-prone position.
2. Align the Interpapillary Line (IPL) perpendicular to the IR and adjust the
head to align the midsagittal plane (MSP) parallel to the IR.
3. Align the Inferior orbitomeatal
line (IOML) parallel to the horizontal axis of image receptor (IR).
4. Place the temporomandibular
joint at the center of IR and place the patient's ear firmly on the
IR.
5. Take the first projection with the mouth closed and the second projection
with the mouth opened.
Collimation: Include the structures from temporal bone to mandibular rami.
Evaluation:
1. Temporomandibular
joint consisted of the bilateral condylar
process of the mandible and mandibular
fossa must be observed.
2. Mandibular condyle should overlap with the mandibular fossa when the mouth
is closed and should be anterior to the mandibular fossa when the mouth is
opened.
kVp:70, mAs: 20
Tip:
1. Open the mouth at the most and maxilla must
not move at this point.
2. Whether the mouth is opened or closed must be marked on the image.
3. Since bilateral temporomandibular
joints are ought to be compared, film both sides with same method.
4. If there is abnormality in functions of temporomandibular joint, mandibular
condyle can be appeared unable to get out of mandibular
fossa or moved too much from the mouth opened image.
5. It is hard to maintain the pose for patient; the inspection must be done in
a short time.
6. Cone is recommended to use for this inspection.
X-ray TM joint Axio-Lateral Oblique View
TM joint Axiolateral Oblique (Open and
Close, Modified Law)
Region
temporomandibular
joint, mandibular
fossa, mandibular
condyle
Pathology
dysfunction of temporomandibular
joint
SID: 100 cm (40 inches)
Central Ray: beam directed at the point 4 cm (1.5 inches) above external auditory meatus (EAM) with 15˚ caudal angulation
Respiration: suspended
Position:
1. The patient is placed either in an erect
position or in a semi-prone position.
2. Align the Interpapillary Line (IPL) perpendicular to the IR and adjust the
head to align the midsagittal plane (MSP) parallel to the IR.
3. Align the Inferior orbitomeatal
line (IOML) parallel to the horizontal axis of image receptor (IR).
4. Place the filming temporomandibular
joint on the IR and rotate the head 15° to the IR.
5. Place temporomandibular joint at the center of IR and place the patient's
cheek firmly on the IR.
6. Take the first projection with the mouth closed and the next one with the
mouth opened.
Collimation: Include from temporal bone to mandibular rami.
Evaluation:
1. Temporomandibular
joint consisted of the bilateral condylar
process of the mandible and mandibular
fossa must be observed.
2. Mandibular condyle should overlap with the mandibular fossa when the mouth
is closed and should be anterior to the mandibular fossa when the mouth is
opened.
kVp: 75, mAs: 20
Tip:
1. Open the mouth at the most and maxilla must
not move at this point.
2. Whether the mouth is opened or closed must be marked on the image.
3. Since bilateral temporomandibular
joints are ought to be compared, film both sides with same method.
4. If there is abnormality in functions of temporomandibular joint, mandibular
condyle can be appeared unable to get out of mandibular
fossa or moved too much from the mouth opened image.
5. It is hard to maintain the pose for patient; the inspection must be done in
a short time.
6. Cone is recommended to use for this inspection.
