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N

o

Film

placement

Head

Position

Point of

EntryAngulation

1

Lateral

Oblique

Projection

(Body of

mandible

projection)

entered

o!er t"e

body of

t"e

mandibl

e

#n bot"projections

$

%%% &"e

"ead

tipped '

degrees

toards

t"e side

being

imaged*

%%%%&"e

c"in is

e+tended ,

ele!ated

slig"tly

-ust

belo

t"e

inferior

border of

t"e

mandible

(belo

t"e loer

.) on t"e

side

opposite

t"e

cassette*

&"e beam

is directed

upards

(/' to

/01)

centered

on t"e

body of

t"emandible

,

perpendic

ular to t"e

2lm*

2

Lateral

Oblique

Projection

(3amus of

mandible

projection)

entered

o!er t"e

ramus of

t"e

mandible

(#n bot"

projections

$ &"e

patient

must "old

t"ecassette in

position

it" t"e

t"umb

under t"e

edge of

Point

posterior

to t"e

t"ird

molar

region on

t"e side

opposite

t"ecassette*

&"e beam

is directed

upards

(/' to

/01)4

centered

on t"e

ramus of

t"e

mandible,

perpendicular to t"e

2lm*

7/26/2019 3. Extra-Oral Techniques

2/5

t"e

cassette

and t"e

palm

against t"eouter

surface of

t"e

cassette)*

Film

placeme

nt

Head

Position

Point of

Entry

Angulati

ons5

3

&rue

Lateral

67ull

)DeadLateral(

&"e

patient is

positioned

in a

manner so

t"at t"e

side oft"e face

touc"es

t"e 2lm

&"e

sagittal

plane of

t"e "ead is

parallel tot"e 2lm*

&"e +/ray

tube

"ead is

positione

d it"

t"e

central

ray iscentered

to t"e

e+ternal

auditory

meatus*

t"e

central ray

is

perpendic

ular to t"e

sagittalplane and

t"e 2lm

4

Postero/

anterior

8ie&"e

patient is

positioned

facing t"e

2lm

%%%&"e

"ead

tipped

forard so

t"at t"e

fore"ead ,

tip of t"e

nose touc"

entered

t"roug"

t"e

occiput*

&"e 9/ray

tube "ead

is

positioned

it" t"e

entral

ray

"ori:ontal

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Note:

The mouth

in this view

is closed

t"e 2lm4

t"e so/

called

fore"ead/

noseposition*

%%&"e

radiograp"i

c baseline

(ant"o

/meatus

line) is

"ori:ontal, at rig"t

angles to

t"e 2lm*

(;ero

angulation

)

5 Occipito/

mental 8ie(ote$

&"e

mout" in

t"is !ie

is open*

%%%&"e

"ead

tipped

bac7 till

t"e c"intouc" t"e

cassette*

%%%&"e

radiograp"i

c baseline

is at ?@ to

t"e 2lm*

entered

t"roug"

t"e

occiput*&"e

central ray

is"ori:ontal

(;ero

angulation

)

6

3e!erse

&ones

8ie

&"e

patient is

positioned

facing t"e

2lm

%%%&"e

"ead

tipped

forards in

t"e

fore"ead/

entered

t"roug"

&"e 9/ray

beam is

aimed

upards

at 1*

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nose

position*

>ote$

&"e mout"

is open*%%%&"e

radi/

ograp"ic

baseline is

"ori:ontal

and at

rig"t angle

to t"e 2lm*

t"e

occiput*

7

6ubmento/

!erte+

8ie

&"e 2lm is

positioned

be"ind

t"e

patient

"ead

>ote$

&"e

mout" is

closed*

%%&"e "ead

is tipped

bac7ards

as far as is

possible4

so t"e

!erte+ of

t"e s7ulltouc"es

t"e 2lm*

%%%&"e

radiograp"i

c baseline

is !ertical

and

parallel to

t"e 2lm*

&"e

central

ray is

aimed

upards

from

belot"e c"in

&"e

central ray

is

centeredon an

imaginary

line

joining t"e

loer 2rst

molars.

Postero/

anterior

cep"alometric

t"e

patient

%%%% &"e

Fran7fort

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7

!ie

face

positioned

frontally

to

cassette(facing

t"e 2lm)

Put t"e

plastic

rapper

of

cep"alost

ate earrods

plane or

Occlusal

plane is

"ori:ontal*(parallel to

Coor)

%%%%% Adjust

Didsagittal

plane in

t"e center

of nasal

support