DH 338 Exam #1
1. What is examined when taking a PA?: entire tooth and supporting bone
2. What does "peri" mean?: around
3. What does "apex" mean?: tip of the tooth root
4. What techniques can be used when taking a PA?: paralleling technique bisecting
technique
5. What is examined in an interproximal examination?: Examine the crowns of maxillary and
mandibular teeth on a single image
6. What does proximal refer to?: adjacent tooth surfaces and crestal bone level
7. What x- ray is taken for an interproximal exam?: bite- wing
8. What is examined in an occlusal examination?: large areas of the maxilla or mandible in one
image
9. What type of technique does the patient bite on the entire receptor?: Oc- clusal
10.What does FMX stand for?: Full mouth series
11.What does CMS stand for?: Complete mouth series
12.What is the CDT code for a FMX?: 0210
13.What is shown in an FMX?: show all the tooth- bearing areas of both jaws
14.What type of x- rays are included in an FMX?: PA's and Bite- wings
15.How many x- rays are in a full FMX at NAU?: 18 (14 PA's and 4 BWX)
16.What is examined in an extraoral examination?: large area of the skull or jaws
17.In the paralleling technique, the receptor is placed to the long axis of the
tooth?: parallel
18.In the paralleling technique, the central ray is to the receptor and long axis of
the tooth: perpendicular
19.What device holds the receptor in place?: beam alignment device
20.In the paralleling technique, the receptor must be placed from the tooth and
, DH 338 Exam #1
toward the middle of the : away, oral cavity
21.The proper position of the receptor in the mouth increases what?: object- receptor distance
22.Object- receptor distance results in what?: magnification and loss of defini- tion
23.Increasing target- receptor distance reduces...: magnification
24.Increasing target- receptor distance increases...: definition
25.What is the source of x- rays?: target
26.What does PID stand for?: Position indicating device
27.A longer PID increases...: target receptor distance
28.What is the recommended target receptor distance?: 16 in.
29.What does a beam alignment device (receptor holding device) do?: posi- tions the receptor
parallel to the long axis of the tooth
, DH 338 Exam #1
30.What types of beam alignments devices does NAU use?: Rinn- ORA One Ring and Arm
positioning system
31.What are important things to consider when using the paralleling tech- nique?: - receptor
placement
- receptor position
- vertical angulation
- horizontal angulation
- receptor exposure
- patients head postition
32.What is meant by proper receptor placement?: The receptor must cover the prescribed area of
teeth to be examined
33.What is meant by proper receptor position?: Must be positioned parallel to the long axis of
the tooth. The receptor and beam alignment device must be positioned away from the
teeth and toward the middle of the oral cavity.
34.What is meant by proper vertical angulation?: he central ray of the x-ray beam must be
directed perpendicular to the receptor and the long axis of the tooth
35.What is meant by proper horizontal angulation?: The central ray of the x-ray beam must be
directed through the contact areas between teeth
36.What is meant by proper receptor exposure?: The x-ray beam must be centered on the
receptor to ensure that all areas are exposed. Failure to center the x-ray beam results in a
partial image on the receptor or a "cone-cut"
37. What should the patient's head be positioned in the paralleling technique?-
: maxillary arch is parallel to the floor and the midsagittal plane is perpendicular to the floor
38.What are the advantages of the paralleling technique?: accuracy, simplicity (use of a beam
alignment device), duplication (easy to standardize)
39.What are the disadvantages of the paralleling technique?: receptor place- ment (small mouth,
shallow palate, tori), discomfort, gag reflex
1. What is examined when taking a PA?: entire tooth and supporting bone
2. What does "peri" mean?: around
3. What does "apex" mean?: tip of the tooth root
4. What techniques can be used when taking a PA?: paralleling technique bisecting
technique
5. What is examined in an interproximal examination?: Examine the crowns of maxillary and
mandibular teeth on a single image
6. What does proximal refer to?: adjacent tooth surfaces and crestal bone level
7. What x- ray is taken for an interproximal exam?: bite- wing
8. What is examined in an occlusal examination?: large areas of the maxilla or mandible in one
image
9. What type of technique does the patient bite on the entire receptor?: Oc- clusal
10.What does FMX stand for?: Full mouth series
11.What does CMS stand for?: Complete mouth series
12.What is the CDT code for a FMX?: 0210
13.What is shown in an FMX?: show all the tooth- bearing areas of both jaws
14.What type of x- rays are included in an FMX?: PA's and Bite- wings
15.How many x- rays are in a full FMX at NAU?: 18 (14 PA's and 4 BWX)
16.What is examined in an extraoral examination?: large area of the skull or jaws
17.In the paralleling technique, the receptor is placed to the long axis of the
tooth?: parallel
18.In the paralleling technique, the central ray is to the receptor and long axis of
the tooth: perpendicular
19.What device holds the receptor in place?: beam alignment device
20.In the paralleling technique, the receptor must be placed from the tooth and
, DH 338 Exam #1
toward the middle of the : away, oral cavity
21.The proper position of the receptor in the mouth increases what?: object- receptor distance
22.Object- receptor distance results in what?: magnification and loss of defini- tion
23.Increasing target- receptor distance reduces...: magnification
24.Increasing target- receptor distance increases...: definition
25.What is the source of x- rays?: target
26.What does PID stand for?: Position indicating device
27.A longer PID increases...: target receptor distance
28.What is the recommended target receptor distance?: 16 in.
29.What does a beam alignment device (receptor holding device) do?: posi- tions the receptor
parallel to the long axis of the tooth
, DH 338 Exam #1
30.What types of beam alignments devices does NAU use?: Rinn- ORA One Ring and Arm
positioning system
31.What are important things to consider when using the paralleling tech- nique?: - receptor
placement
- receptor position
- vertical angulation
- horizontal angulation
- receptor exposure
- patients head postition
32.What is meant by proper receptor placement?: The receptor must cover the prescribed area of
teeth to be examined
33.What is meant by proper receptor position?: Must be positioned parallel to the long axis of
the tooth. The receptor and beam alignment device must be positioned away from the
teeth and toward the middle of the oral cavity.
34.What is meant by proper vertical angulation?: he central ray of the x-ray beam must be
directed perpendicular to the receptor and the long axis of the tooth
35.What is meant by proper horizontal angulation?: The central ray of the x-ray beam must be
directed through the contact areas between teeth
36.What is meant by proper receptor exposure?: The x-ray beam must be centered on the
receptor to ensure that all areas are exposed. Failure to center the x-ray beam results in a
partial image on the receptor or a "cone-cut"
37. What should the patient's head be positioned in the paralleling technique?-
: maxillary arch is parallel to the floor and the midsagittal plane is perpendicular to the floor
38.What are the advantages of the paralleling technique?: accuracy, simplicity (use of a beam
alignment device), duplication (easy to standardize)
39.What are the disadvantages of the paralleling technique?: receptor place- ment (small mouth,
shallow palate, tori), discomfort, gag reflex
