Exam 17: Paralleling Technique

Which basic rule of paralleling states that the receptor must be parallel to the long axis of the tooth?

When placing the receptor in the mandibular premolar region,the receptor must be placed ________ the tongue.When inserting the receptor holder into the mouth,the receptor is tipped __________ the tongue.

The lingual cusp of the first premolar usually obscures the distal contact of the canine on the ________________ exposure.

To achieve parallelism between the receptor and the tooth,the ____________ distance must be increased to keep the receptor parallel with the long axis of the tooth.

(1)The American Dental Association (ADA)and the American Academy of Oral and Maxillofacial Radiology both recommend the use of a beam alignment device to reduce the amount of radiation the patient receives.(2)Limiting the size of the x-ray beam not only reduces the amount of skin that is exposed but also results in a significant reduction of radiation to the patient,by as much as 20%.

Which target-receptor distance should be used in the paralleling technique to compensate for image magnification and loss of definition?

Which of the Rinn beam alignment device includes one ring and one arm that can be used for anterior,posterior,and bite-wing receptor positioning?

Reusable receptor holders must be _________________ after each use.

Which posterior quadrant would be the best for you to begin with when using the paralleling technique?

Which of the following images must include the crowns,roots,and surrounding bone of the right or left central and lateral incisors?

Which basic rule of paralleling indicates that the central ray should be directed through the contact area of the teeth?

(1)The dental radiographer should be careful not to stimulate the patient's gag reflex.(2)Once the gag reflex is stimulated,the patient may gag on receptors that could normally be tolerated.

(1)When taking maxillary periapical images on a patient with a shallow palate,there is only one technique that can be used to compensate for lack of parallelism.(2)To compensate for lack of parallelism,the vertical angulation can be increased by 5 to 15 degrees more than the XCP instrument indicates.

How many exposures of the posterior teeth will you need to take when using the paralleling technique?

Which of the following receptor holders include aiming rings that aid in the alignment of the position-indicating device (PID)with the receptor?

Identify this image;it is mounted using the labial view.

Which of the following is a disposable receptor holder designed for one-time use only?

Image magnification occurs when the ______________ distance is increased.

Your patient has a shallow palate;you should modify your technique when there is a lack of parallelism ________________.

According to the basic principles of the paralleling technique,the receptor is placed in the mouth _________ to the long axis of the tooth being x-rayed,and the central ray of the x-ray beam is directed ____________ to the receptor and long axis of the tooth.