Chapter 11

Question 1

alternating current

Answer 1

the usual waveform of an AC power circuit is a sine wave

Question 2

Apex

Answer 2

the pointed end of a cone-shaped part, or the end of a tooth root where blood vessels and nerves enter the tooth

Question 3

Bisecting-angle technique

Answer 3

a radiographic technique obtained by visualizing an imaginary line that bisects the angle formed by the x-ray film and the structure being radiographed

Question 4

Dental radiographic film

Answer 4

x-ray film used in the dental office

Question 5

Dental x-ray machine

Answer 5

machine used to take x-ray

Question 6

Dentin

Answer 6

one of the hard tissues of the teeth that constitutes most of its bulk. Lies between the pulp cavity and the enamel, and where it is not covered by enamel, it is covered by cementum, the third hard substance of the tooth

Question 7

Digital X-ray system

Answer 7

digital or direct radiology system can include a sensor or phosphorous plate, also known as indirect or computerized radiology

Question 8

Dilaceration

Answer 8

an abnormally shaped root resulting from trauma during tooth development

Question 9

Direct current

Answer 9

DC is the unidirectional flow of electric charge

Question 10

Edentulous

Answer 10

the absence of teeth

Question 11

Embedded tooth

Answer 11

a tooth that is usually covered in bone, has not erupted into the oral cavity,, and is not likely to erupt

Question 12

Exodontics

Answer 12

the branch of dentistry dealing with extraction of teeth

Question 13

Fistula

Answer 13

any abnormal, tubelike passage within body tissue

Question 14

Impacted tooth

Answer 14

an unerupted or partially erupted tooth that is prevented from erupting further by any structure

Question 15

Interproximal

Answer 15

the are between adjacent surfaces of adjoining teeth

Question 16

Intraoral film

Answer 16

nonscreen radiographic film that fits neatly into the oral cavity. It can be processed in 1 to 2 minutes with minimal loss of detail

Question 17

Kilovoltage peak

Answer 17

the highest kilovoltage used in producing a radiograph

Question 18

Lamina dura

Answer 18

a radiographic term referring to the dense cortical bone forming the wall of the alveolus. It appears radiographically as a bony white line next to the dark line of the periodontal space

Question 19

Lamina lucida

Answer 19

a radiographic term referring to the periodontal space between the lamina dura and tooth. It is occupied by the periodontal ligament

Question 20

Lucency

Answer 20

an area of an x-ray image that represents the absorption of less radioactive energy than the surrounding tissue. Lucent areas appear dark compared tot he surrounding area

Question 21

Milliamperage

Answer 21

measurement of x-ray current

Question 22

Odontoblasts

Answer 22

cells that line the pulp chamber and produce dentine

Question 23

Parallel Technique

Answer 23

a radiographic technique indicated to evaluate the caudal mandibular teeth and nasal cavity

Question 24

Pulse

Answer 24

measurement of setting certain dental x-ray machine timers

Question 25

SLOB Rule

Answer 25

same lingual opposite buccal (SLOB) rule used to identify roots that are laying side by side