TCDHA Rad Theory Questions with Verified
Correct Answers
Primary benefit of radiographs
To detect disease
Use of radiographs
1. Detect disease (caries, periodontal disease) lesions etc.
2. Provides info during dental tx
3. Evaluate growth & development
4. Document the condiiton of a client at a specific time
Dilacerated roots
Sharp bend of the roots or a sharp bend between the crown & root
Internal resorption
Triggered when the nerve is irritated. Cells eat away at the tooth causing a hole.
External resorption
Cells from the PDL eat away at the root, also causing a hole. Can be caused by trauma to the
tooth
Film Mount
cardboard, plastic, or vinyl holder that is used to support and arrange dental radiographs.
Labelling mounts
Include clients name, entists name, date & the type & number of radiographs.
Film mount is used to...
, Dcrease handling of film, facilitate filing, allow for easy viewing, & eliminate confusion
regarding pts right & left side.
Illuminator (viewbox)
an illuminated device used to view radiographs
Matter
Anything that occupies space & has mass
Atoms
Fundamental unit of matter.
1. Nucleus - made of protons & neutrons
2. Electrons orbit around the nucleus
Orbits/shells
An atoms contains a max of 7 shells/orbits, designated with letters (k, l, m, n, o, p, q)
Binding energy/binding force
Electrons are kept in their orbit by the electrostatic force between the nucleus & electrons.
Determined by the distance between nucleus & electron
Molecular Structure (molecules)
2 or more atoms joined by chemical bonds. Formed by the transfer or sharing of electrons
Ion
An atom that gains or loses an electron & becomes electrically unbalance
Ion Pair
Positive ion & negative ion result from the gain & loss of an electron
Correct Answers
Primary benefit of radiographs
To detect disease
Use of radiographs
1. Detect disease (caries, periodontal disease) lesions etc.
2. Provides info during dental tx
3. Evaluate growth & development
4. Document the condiiton of a client at a specific time
Dilacerated roots
Sharp bend of the roots or a sharp bend between the crown & root
Internal resorption
Triggered when the nerve is irritated. Cells eat away at the tooth causing a hole.
External resorption
Cells from the PDL eat away at the root, also causing a hole. Can be caused by trauma to the
tooth
Film Mount
cardboard, plastic, or vinyl holder that is used to support and arrange dental radiographs.
Labelling mounts
Include clients name, entists name, date & the type & number of radiographs.
Film mount is used to...
, Dcrease handling of film, facilitate filing, allow for easy viewing, & eliminate confusion
regarding pts right & left side.
Illuminator (viewbox)
an illuminated device used to view radiographs
Matter
Anything that occupies space & has mass
Atoms
Fundamental unit of matter.
1. Nucleus - made of protons & neutrons
2. Electrons orbit around the nucleus
Orbits/shells
An atoms contains a max of 7 shells/orbits, designated with letters (k, l, m, n, o, p, q)
Binding energy/binding force
Electrons are kept in their orbit by the electrostatic force between the nucleus & electrons.
Determined by the distance between nucleus & electron
Molecular Structure (molecules)
2 or more atoms joined by chemical bonds. Formed by the transfer or sharing of electrons
Ion
An atom that gains or loses an electron & becomes electrically unbalance
Ion Pair
Positive ion & negative ion result from the gain & loss of an electron
