Radiographic exhibit

DEPARTMENT

DENTAL AND E E 1

z= E E IE s

OF

ORAL RADIOGRAPHY

Edited By Clarence 0. Simpson, M.D., D.D.S., F.A.C.D., and Howard R. Raper, D.D.S., F.A.C.D.

Fig.

1.

Fig;. 2.

Fig. L-Shows patient in wsition of taking the bite film of the maxillary anterior teeth. The patient’s head is posed so that a line drawn from the tragus to the ala of the nose is horizontal or parallel to the floor. The tube is directed at a 45 degree angle to the Aim placed between the maxillary and mandibular teeth. This gives thr, root arm of the nraxillary incisors. Fig. L-With the film between the treth running f’rom thr lateral to the first molar on une side. The tube directed at a 45 degree angle to thr flint gives the root al’ean of the rnaxillary caninw, gwtnolarx an11 first nrolnrs. .L similar pictuw is taken of tho ijpposite sidt,.

J. Lowe Young

Fig. 3. Fig. 4. Fig. 3.-With the head thrown well back and the film between the teeth, the point of the tube just slightly above the symphysis, the direction of the tube to the fllm being a 45 degree angle, the root area of the four mandibular incisors is obtained. Fig. 4.-With the head thrown well back and then tipped sideways so that the face is resting with the chin close to the casette which carries a 5x7 film, one-half of which is covered by a heavy glass plate. The tube is directed just distal to and under the angle of the mandible of the opposite side of the face from which the picture is being made. This pose gives the entire root area of all teeth in the mandible distal to the incisors. This view also gives the maxillary third molar area so that we can definitely determine the beginning of enamel formation of both maxillary and mandibular third molars. The patient is then moved to face in just the opposite direction and the brass plate moved to the opposite end of the casette and a similar exposure made of the other side of the mandible.

Fig.

5.-Shows

the

bracket

and

head

rest

that

is used

in taking

these

extraoral

pictures.

Fig.

6.-Shows

the

I’csult

of

such

:I set

of

ex~osuws.

1072

Fig. beginning third molar

Case L-Showing five 7. at fifteen years of age. has straightened UP.

sets This

A. of extraoral series shows

radiograms taken how wonderfully

about the

one Year mandibular

apart. right

B. Fig.

7.

Case 1.

1074

Fig.

J. Lowe Young

8.

Case 2.-Four

Alms taken about a molars have tipped to

apart, showing that both a horizontal position.

mandibular

third

Radiographic

Fig.

8.

Exhibit

Cast!

2.

1075

,T. Lowe

1076

Fig. 9. Case the right mandibular horizontally.

3.-Three third

sets molnr

J’o7(71(1

of fllms taken at intervals of two years. and the left maxillary third molar have

These tippwl

show th decidctl

Fig

3078

J.

Lowe

Pourzy

B.

Fig. 10.

Case 4.

Radkgmphic

Exhibit

Fig. 11. Case 5.-Three films. Two years have elapsed between the flrst and sect md, one month between the second and third. The reason for this is that I have questioned the sibility of a tooth changing as was shown and I feared that the films had been improp er1y wded.

J. Lowe

F ‘ig. 12.

Case B.-Three

Young

films taken two and one years apart; molars have tipped.

note both mandibular

LW L