Radiology module 8

Question 0

The distance from tooth to film should be — with bisecting

Answer 0

As short as possible

Question 1

Bisecting is also called?

Answer 1

Short cone

Isometry

Question 2

The central ray should be at a right angle to the — — when using bisecting technique?

Answer 2

Bisecting line

Question 3

5 guidelines for bisecting technique?

Answer 3

1- cover area
2- film against lingual of occlusal surface and 1/8 past plane
3- vertical angulation (central ray at right angle to bisecting line)
4- horizontal angulation through contacts
5- PID centered over film

Question 4

Advantages of Bisecting 
Can use --- cone
--- film placement 
Good for --- mouths 
--- exposure time

Answer 4

Small
Easier
Small, low palats, children
Shorter (25% less)

Question 5

The — — is sometimes superimposed over apices on MX

Answer 5

Zygomatic arch

Question 6

Bisecting technique comes with — tissue exposure and more chance of image —

Answer 6

High

Distortions

Question 7

Bisecting technique commonly uses what film holding devices?

Answer 7

Snap-a-ray
Bite blocks
EEZEE Grips

Question 8

In order to fix elongation you?

Answer 8

Increase vertical angulation

PID points down more

Question 9

To fix foreshortening you?

Answer 9

Decrease vertical angulation

PID pointing down a little less

Question 10

Images close to PID may appear

— with bisecting while those far from PID appear —

Answer 10

Foreshortened

Elongated

Question 11

Films are commonly – or — with bisecting technique

Answer 11

Over/under exposed

Question 12

—- is a common mistake with bisecting due to horizontal angulation placement

Answer 12

Overlapping

Question 13

Central ray entry for MX centrals/laterals

Answer 13

Midpoint of nares

Question 14

Central ray entry for MX canines

Answer 14

Base of lateral nasal groove

Question 15

Central ray entry for MX premolars

Answer 15

Anterior part of cheek bone

Question 16

Central ray entry for MX molars

Answer 16

Zygomatic arch

Question 17

Central ray entry for MN centrals/laterals

Answer 17

Chin

Question 18

Central ray entry for MN canines

Answer 18

Root of canine

Question 19

Central ray entry for MN premolars

Answer 19

Mental foramen

Question 20

Central ray entry for MN molars

Answer 20

Roots of molars

Question 21

What structures are most distorted with bisecting technique

Answer 21

Maxillary molar roots

Question 22

Reasons to use bisecting over paralleling

Answer 22

Shallow Palate and floor of mouth

Malpositioned teeth

Question 23

Bisecting technique has — standardization because?

Answer 23

Low

Guessing on bisecting line