Question 1

Occlusal films can be processed in the darkroom,with similar technique to standard intraoral films.The exposure times of occlusal films are equivalent to that which is used for the maxillary molar intraoral periapical projection.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Accepted Answer

Both statements are true. Occlusal films can be processed using standard intraoral film technique and the exposure time is similar to that of the maxillary molar intraoral periapical projection.

Question 2

When exposing the mandibular incisors with the bisecting technique,the vertical angulation should be preset at:
A)-5 degrees.
B)-15 degrees.
C)-20 degrees.
D)+30 degrees.

Accepted Answer

The vertical angulation for the mandibular incisors using the bisecting technique should be preset at approximately 20 degrees to ensure accurate imaging.

Question 3

In the bisecting technique,the tooth-receptor distance is:
A)minimal.
B)maximal.
C)not important.
D)None are correct.

Accepted Answer

In the bisecting technique, minimizing the distance between the tooth and receptor is important to ensure accuracy and minimize distortion. A minimal distance also helps to reduce magnification and maintain the correct angle between the tooth and the receptor.

Question 4

In the bisecting technique,the receptor is held away from the tooth as much as possible without bending the receptor.The long axis of the receptor therefore is not parallel to the long axis of the tooth.
A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Accepted Answer

The answer of In the bisecting technique,the receptor is held...

Question 5

Where is the central ray directed for or maxillary central/lateral projection with the bisecting technique?
A)Just below the midpoint of the nares (the nostrils).
B)Through the zygomatic arch at the center of the receptor.
C)At the base of the lateral nasal groove,aimed at the center of the receptor.
D)At the most anterior part of the cheekbone,aimed at the center of the receptor.

Accepted Answer

In the bisecting technique for maxillary central/lateral projection, the central ray is directed just below the midpoint of the nares to properly capture the image of the maxillary central and lateral incisors.

Question 6

Shorter exposure times can be used for the bisecting technique because of the shorter FFD.

Accepted Answer

With the bisecting technique, the film is placed very close to the tooth, resulting in a shorter FFD (focus-to-film distance). This means that shorter exposure times can be used while still obtaining a diagnostic image.

Question 7

The finger holding method should be used with the bisecting technique.

Accepted Answer

The finger holding method is not recommended with the bisecting technique as it may cause distortion of the image. Instead, other methods like the film holding instrument or the XCP instrument should be used for proper positioning of the film.

Question 8

A -5 degree vertical angulation for the lower incisors will produce a(an)foreshortened image.

Accepted Answer

A -5 degree vertical angulation for the lower incisors will produce an elongated image, not a foreshortened image.

Question 9

When compared with periapical films,topographic occlusal films have a larger field size.

Accepted Answer

Topographic occlusal films have a larger field size than periapical films.

Question 10

The topographic occlusal projection can be used for:
A)detecting caries.
B)localizing impactions.
C)evaluating periodontal bone height.
D)visualizing large areas of pathology.

Accepted Answer

The topographic occlusal projection is a technique used in dental radiography to visualize large areas of pathology or abnormalities in the teeth, bone, and soft tissues of the orofacial complex. It is not typically used for detecting caries or evaluating periodontal bone height, and while it can help localize impactions, there are other imaging techniques that may be more useful for this purpose. Therefore, the best choice is D, visualizing large areas of pathology.

Question 11

Right-Angle Projection with right-angle occlusal projections,the vertical angulation should be at:
A)90 degrees.
B)40 degrees.
C)75 to 90 degrees.
D)35 to 75 degrees.

Accepted Answer

Right-angle occlusal projections require the vertical angulation to be at 90 degrees to ensure the x-ray beam is perpendicular to the film or sensor, providing an accurate representation of the area being examined.

Question 12

When the periapical radiographs show the occlusal surfaces of the teeth what is the cause of this error with the bisecting technique?
A)Inadequate vertical angulation
B)Excessive vertical angulation or poor occlusal plane orientation
C)The patient's head has tipped away from the proper sagittal plane
D)Inadequate vertical angulation and the patient's head has tipped away from the proper sagittal plane

Accepted Answer

The answer of When the periapical radiographs show the occlusal...

Question 13

The imaginary angle that is bisected with the use of the Bisecting Angle Technique is formed between the long axis of the tooth and:
A)the long axis of the PID.
B)the long axis of the receptor.
C)the horizontal axis of the receptor.
D)the horizontal axis of the tube head.

Accepted Answer

The Bisecting Angle Technique involves bisecting the angle formed between the long axis of the tooth and the long axis of the receptor. Therefore, option B, which refers to the long axis of the receptor, is the correct choice. Options A, C, and D are incorrect as they do not represent the angle being bisected in the technique.

Question 14

Identify the number that correlates to the size of an occlusal film packet:
A)size 0.
B)size 1.
C)size 2.
D)size 4.

Accepted Answer

Size 4 is the correct answer because it is specifically designated for occlusal film packets, which are used to capture large areas of the mouth.

Question 15

Identify the major disadvantage of the bisecting technique:
A)it is difficult for the patient.
B)images produced are often distorted.
C)film holding devices may be confusing.
D)the long cone required is bulky and hard to manage.

Accepted Answer

The major disadvantage of the bisecting technique is that the images produced are often distorted.

Question 16

Which of the following is inherent in the use of the bisecting technique?
A)Overlapping
B)Patient movement
C)Dimensional distortion
D)Difficulty in receptor placement

Accepted Answer

Dimensional distortion is inherent in the use of the bisecting technique due to the angulation of the x-ray beam, which may cause distortion in image size and shape. Overlapping, patient movement, and difficulty in receptor placement are not necessarily inherent in the use of the bisecting technique, but may occur due to errors in technique or patient cooperation.

Question 17

A +75 degree vertical angulation for a maxillary cuspid will produce a(an)elongated image.

Accepted Answer

A +75 degree vertical angulation for a maxillary cuspid would produce a foreshortened image, not an elongated one, because the angle is excessively steep, causing the x-ray beam to hit the tooth at a very high angle, reducing the image size on the film.

Question 18

During the bisecting technique,an imaginary bisecting line is drawn to bisect the angle formed by the long axis of the tooth and the plane of the receptor.The central ray of the x-ray beam is directed vertically to this bisecting line.
A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Accepted Answer

The answer of During the bisecting technique,an imaginary bisecting line...

Question 19

All of the following are possible patient scenario in which the bisecting angle technique would be used EXCEPT one.Which one is the EXCEPTION?
A)A child
B)An adult with a small mouth
C)A person with a low palatal vault
D)A person with a normal to high palatal vault

Accepted Answer

The bisecting angle technique is not recommended for patients with a normal to high palatal vault as it can result in distortion and elongation of the teeth. It is best for patients with a low palatal vault or shallow oral cavity where parallelism cannot be achieved with other techniques.

Question 20

In the mandibular occlusal technique,the receptor is placed in the patient's mouth on the occlusal surfaces of the lower teeth.The front (white side)of the packet should be facing the mandible on the occlusal surfaces of the lower teeth.
A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Accepted Answer

The first statement is correct, as the mandibular occlusal technique involves placing the receptor on the occlusal surfaces of the lower teeth. The second statement is also correct, as the front (white side) of the packet should indeed be facing the mandible on the occlusal surfaces of the lower teeth. Therefore, both statements are true.

Quiz 10: Accessory Radiographic Techniques: Bisecting Technique and Occlusal Projections

Occlusal films can be processed in the darkroom,with similar technique to standard intraoral films.The exposure times of occlusal films are equivalent to that which is used for the maxillary molar intraoral periapical projection.

When exposing the mandibular incisors with the bisecting technique,the vertical angulation should be preset at:

In the bisecting technique,the tooth-receptor distance is:

In the bisecting technique,the receptor is held away from the tooth as much as possible without bending the receptor.The long axis of the receptor therefore is not parallel to the long axis of the tooth.

Where is the central ray directed for or maxillary central/lateral projection with the bisecting technique?

Shorter exposure times can be used for the bisecting technique because of the shorter FFD.

The finger holding method should be used with the bisecting technique.

A -5 degree vertical angulation for the lower incisors will produce a(an)foreshortened image.

When compared with periapical films,topographic occlusal films have a larger field size.

The topographic occlusal projection can be used for:

Right-Angle Projection with right-angle occlusal projections,the vertical angulation should be at:

When the periapical radiographs show the occlusal surfaces of the teeth what is the cause of this error with the bisecting technique?

The imaginary angle that is bisected with the use of the Bisecting Angle Technique is formed between the long axis of the tooth and:

Identify the number that correlates to the size of an occlusal film packet:

Identify the major disadvantage of the bisecting technique:

Which of the following is inherent in the use of the bisecting technique?

A +75 degree vertical angulation for a maxillary cuspid will produce a(an)elongated image.

During the bisecting technique,an imaginary bisecting line is drawn to bisect the angle formed by the long axis of the tooth and the plane of the receptor.The central ray of the x-ray beam is directed vertically to this bisecting line.

All of the following are possible patient scenario in which the bisecting angle technique would be used EXCEPT one.Which one is the EXCEPTION?

In the mandibular occlusal technique,the receptor is placed in the patient's mouth on the occlusal surfaces of the lower teeth.The front (white side) of the packet should be facing the mandible on the occlusal surfaces of the lower teeth.