Orbits, Mandible, and TMJ

Orbits are what shape?

Cone-shaped

What angle are the orbits at?

37 degree medial (in) and 30 degree cephalic (up)

What bones make up the orbits?

7 bones - frontal, sphenoid, ethmoid, maxilla, zygoma, lacrimal, and palatine

What Cranial Bones are apart of the Orbit?

Frontal, Sphenoid, and Ethmoid

What facial bones are apart of the Orbit?

Maxilla, zygoma, lacrimal, and palatine

What cranial nerves go through the openings of the orbits?

CN II through Optic Foramen

CN III-VI through Superior Orbital Fissure

CN V through Inferior Orbital Fissure

What is A?

Orbital plate of Frontal bone

What is B?

Sphenoid Bone

What is C?

optic foramen and canal

What is D?

Superior Orbital Fissure

What is E?

Infraorbital Margin (IOM)

What is F?

Sphenoid strut

What is G?

Lateral Orbital Margin

What is H?

Supraorbital Margin (SOM)

Parieto-Orbital Oblique Projection: Optic Foramina is also called

Rhese Method

Rhese Method Technique

75-80 @ 10-16

Rhese Method Positioning

Rotate head 37 degrees toward affected side

Tripod - chin, cheek, and nose touch the table

AML perpendicular to the IR

What is Red?

Frontal Sinus

What is Orange?

Optic Foramen and canal

What is Yellow?

Inferior Orbital Rim

What is Green?

Maxillary Sinus

What is Blue?

Optic foramen and canal

What is Purple?

Lateral Orbital Margin

What is Red?

Mental point

What is Orange?

symphysis (symphysis menti)

What is Yellow?

Mentum (mental protuberance)

What is Light Green?

alveolar process

What is Dark Green?

Mental foramen

What is Light Blue?

Body

What is Dark Blue?

Angle or gonion

What is Purple?

Ramus

What is Red?

Coronoid process

What is Orange?

mandibular notch

What is Yell9ow?

Condyloid process

What is Green?

Condyle or head

What is Blue?

Neck

What is Purple?

Ramus

What is Red?

condyle or head

What is Orange?

Coronoid process

What is Yellow?

Mentum

What is Green?

Body

What is Blue?

Ramus

What is Red?

Temporal bone

What is Orange?

Capsule

What is Yellow?

articular disk

What is Green?

temporomandibular fossa

What is Light Blue?

EAM

What is Dark Blue?

Condyle or head

What is Purple?

Neck

What is Red?

Temporomandibular joint (TMJ)

What is Yellow?

Temporomandibular fossa

What is Green?

Condyle or head

What is Blue?

EAM

To image the mandibular Ramus - what lateral?

True lateral

To have a general mandibular survey - what lateral

10-15 degree rotation

To image the mandibular body - what lateral?

30 degree rotation

To image the mandibular mentum - what lateral?

45 degree

Lateral Mandible Technique

75-80 @ 10-16

Lateral Mandible CR

side of interest against IR

25 degree cephalic angle or angle head 25 degree towards the IR

Exit mandible of interest

PA or PA Axial Mandible Technique

75-80 @ 10-16

PA Mandible CR

horizontal, center to junction of lips

PA or PA Axial Mandible Part Positioning

forehead on IR

OML perpendicular to IR

MSP perpendicular to IR

PA Axial Mandible CR

exit at acanthion, angled 20-25 degree cephalic

Anatomy visualized in PA Mandible

mandibular rami and lateral portion of the body

Anatomy visualized in PA Axial Mandible

TMJ region and heads of condyles visible through mastoid processes, condyloid processes well visualized

AP Axial (Towne) Mandible Technique

75-80 @ 10-16

AP Axial (Towne) Mandible CR

OML used - 35 degree caudal

IOML used - 42 degree caudal

Centered 1 in superior to glabella

AP Axial (Towne) Mandible Anatomy Visualized

condyloid process of mandible and TM fossae

Panorex is also called

Orthopantomogram

Panorex positioning

IOML parallel to floor

bite block between patient teeth

tongue to roof of mouth

What is the only moveable joint in the skull

TMJ

Classify TMJ

Synovial, Diarthrodial, Hinge-type and gliding type

What does the condyle do as you open your mouth

condyle moves forward

AP Axial (Towne) TMJ Technique

75-80 @ 10-16

AP Axial (Towne) TMJ CR

OML used - 35 degree caudal

IOML used - 42 degree caudal

Center 3 inches superior to nasion

Axiolateral TMJ - Schuller Method Technique

75-80 @ 10-16

Axiolateral TMJ - Schuller Method CR

center to projected TMJ

25-30 degree caudal angle

Axiolateral TMJ - Schuller Method Positioning

Erect or semi prone - head in true lateral

IPL perpendicular to IR

IOML perpendicular to front edge of IR

Closed and open mouth

Axiolateral Oblique TMJ - Modified Law Method Technique

75-80 @ 10-16

Axiolateral Oblique TMJ - Modified Law Method CR

15 degree caudal

centered 1.5 in superior to upside EAM

Axiolateral Oblique TMJ - Modified Law Method Part Positioning

head in lateral position, side of interest closest to IR

Rotate face 15 degree towards the IR

IPL perpendicular to IR

MSP parallel to IR

IOML perpendicular to front edge of IR