1390 lesson 2 review

Types of X-rays in FMX

Periapicals and bitewings.

Recommended technique by ADA for FMX

The paralleling technique.

Placement of anterior receptors

Vertically.

Starting point for anterior exposure sequence

Maxillary central incisors.

Error caused by incorrect horizontal angulation

Overlapping.

Receptor size for adult occlusal images

Size 4.

Image appearing shorter than the actual tooth

Foreshortening.

When to take images for patients with hypersensitive gag reflex

Posterior molar periapicals should be taken last.

Exposure factors for pediatric patients

Should be decreased because their a smaller size

Shape divided in the bisecting technique

A triangle.

Placement of posterior receptors

Horizontally.

Receptor size used for adult bitewings

Size 2.

Primary use of bitewing radiographs

To detect interproximal caries.

Effect of elongation on tooth appearance

Makes the tooth appear longer than the actual tooth.

Effect of foreshortening on tooth appearance

Makes the tooth appear shorter than the actual tooth.

a full mouth seriers typically consists of how many images?

18 to 20

The two basic techniques for obtaining periapical radiographs are

the paralleling technique and the bisecting technique

In the paralleling technique, the image receptor must be positioned

parallel to the long axis of the tooth

The central ray should be directed ____ to the image receptor and long axis of the
tooth

perpendicular

Proper horizontal angulation directs the x-ray beam through

The contact areas between teeth.

When taking periapicals, you should always begin

with the anterior teeth.

The recommended maxillary anterior sequence begins with the

maxillary right canine.

Posterior exposures should begin with the ____ view before the molar view.

premolar

A bitewing image shows the crowns and

interproximal areas of the teeth.

The molar bitewing should be centered over the

second molars

In the bisecting technique, the image receptor is placed directly against the ___

teeth

The major disadvantage of the bisecting technique is image ___

distortion

Correct vertical angulation produces an image that is the same ______

length as the tooth.

Excessive vertical angulation results in a ___

foreshortened image

Insufficient vertical angulation results in an ____

elongated image