RHS Exam - Questions And Accurate Answers
Radiolucent Correct Answer - structures that are less dense and allow
radiant energy to pass through (the dark to grey spots on x-ray)
soft or less dense, tissues and structures allow radiant energy to pass through
includes periodontal ligaments and pulpal tissues
Radiopaque Correct Answer - portions on radiograph appears light or
white
dense structures block or slow the passage of radiant energy
ex: dentin, enamel and bone or metal and resin reinforced restorations
Amalgam Restoration Correct Answer - A form of dental restoration that
uses a combination of two or more metals, one of which is mercury; a blend of
powdered metal alloy and mercury to produce a restorative material.
because amalgam is mainly composed of metal, radiant energy cannot pass
through it causing the image to appear white or light
form of radipaque
Inverted Y Correct Answer - The intersection of the maxillary sinus and
the nasal cavity
above canine
appears as radiopaque
Maxillary Sinus Correct Answer - Large air-filled cavities located above the
maxillary premolar and molar teeth
appear radiolucent on maxillary pre-molar and molar periapical images
the outline of the denser tissue (floor of sinus) appears radiopaque
,periapical images Correct Answer - radiograph that exposes the entire
tooth and surrounding tissues
Nutrient canals Correct Answer - Small passageways through bone that
contain blood vessels, nerve tissue, and lymphatic tissue that supply the teeth
may appear as radiolucent lines
called pulp tissue once they enter the tooth
Internal Oblique Ridge Correct Answer - A radiopaque band that extends
downward and forward from the ramus
When both appear, the external oblique ridge is superior to the internal
oblique ridge
Mandibular Canal Correct Answer - A radiolucent band outlined by two
thin radiopaque lines that represent the cortical walls of the canal
Alveolar ridge Correct Answer - Bony ridge that contains the alveoli (tooth
sockets)
appears radiopaque
Enamel Correct Answer - Covers the crown of the tooth and protects the
dentin
hardest calcified tissue in the human body
appears radiopaque
Dentin Correct Answer - Hard portion of the root that surrounds the pulp
and is covered by enamel on the crown and by cementum on the root
dentinoenamel junction Correct Answer - Line marking the junction of the
dentin and the enamel
Pulp Correct Answer - The tissue that contains the blood vessels and
nerves of a tooth
, radiolucent
Periodontal ligament Correct Answer - attaches tooth to jaw
X-ray Correct Answer - a form of electromagnetic radiation used to
produce dental images
ionizing radiation Correct Answer - enough energy to dislodge electrons
from atoms, forming ions; capable of causing cancer (gamma, X-rays, UV)
Radiation Correct Answer - Process of emission, transmission, and
absorption of radiant energy
Ionization Correct Answer - The conversion of a stable atom into an ion
that forms an ion pair
General or braking radiation occurs Correct Answer - after the timer
button is pressed, when the electrons are pulled from the cathode to the
tungsten target
When the electrons hit the tungsten target, their kinetic energy is converted to
Correct Answer - heat and x-rays
Control settings can be set lower when using Correct Answer - digital
imaging
Primary Radiation Correct Answer - the one absorbed by the patient
unobstructured, short wave x-ray beams produced by the unit and emitted
from the x-ray tube
Secondary radiation Correct Answer - X-radiation that is created when the
primary beam interacts with matter
Long wave x-ray beams that strike an object (like the patient's face) and are
absorbed by the skin but are not strong enough to penetrate to the image
receptor
still damaging, but less than primary
Radiolucent Correct Answer - structures that are less dense and allow
radiant energy to pass through (the dark to grey spots on x-ray)
soft or less dense, tissues and structures allow radiant energy to pass through
includes periodontal ligaments and pulpal tissues
Radiopaque Correct Answer - portions on radiograph appears light or
white
dense structures block or slow the passage of radiant energy
ex: dentin, enamel and bone or metal and resin reinforced restorations
Amalgam Restoration Correct Answer - A form of dental restoration that
uses a combination of two or more metals, one of which is mercury; a blend of
powdered metal alloy and mercury to produce a restorative material.
because amalgam is mainly composed of metal, radiant energy cannot pass
through it causing the image to appear white or light
form of radipaque
Inverted Y Correct Answer - The intersection of the maxillary sinus and
the nasal cavity
above canine
appears as radiopaque
Maxillary Sinus Correct Answer - Large air-filled cavities located above the
maxillary premolar and molar teeth
appear radiolucent on maxillary pre-molar and molar periapical images
the outline of the denser tissue (floor of sinus) appears radiopaque
,periapical images Correct Answer - radiograph that exposes the entire
tooth and surrounding tissues
Nutrient canals Correct Answer - Small passageways through bone that
contain blood vessels, nerve tissue, and lymphatic tissue that supply the teeth
may appear as radiolucent lines
called pulp tissue once they enter the tooth
Internal Oblique Ridge Correct Answer - A radiopaque band that extends
downward and forward from the ramus
When both appear, the external oblique ridge is superior to the internal
oblique ridge
Mandibular Canal Correct Answer - A radiolucent band outlined by two
thin radiopaque lines that represent the cortical walls of the canal
Alveolar ridge Correct Answer - Bony ridge that contains the alveoli (tooth
sockets)
appears radiopaque
Enamel Correct Answer - Covers the crown of the tooth and protects the
dentin
hardest calcified tissue in the human body
appears radiopaque
Dentin Correct Answer - Hard portion of the root that surrounds the pulp
and is covered by enamel on the crown and by cementum on the root
dentinoenamel junction Correct Answer - Line marking the junction of the
dentin and the enamel
Pulp Correct Answer - The tissue that contains the blood vessels and
nerves of a tooth
, radiolucent
Periodontal ligament Correct Answer - attaches tooth to jaw
X-ray Correct Answer - a form of electromagnetic radiation used to
produce dental images
ionizing radiation Correct Answer - enough energy to dislodge electrons
from atoms, forming ions; capable of causing cancer (gamma, X-rays, UV)
Radiation Correct Answer - Process of emission, transmission, and
absorption of radiant energy
Ionization Correct Answer - The conversion of a stable atom into an ion
that forms an ion pair
General or braking radiation occurs Correct Answer - after the timer
button is pressed, when the electrons are pulled from the cathode to the
tungsten target
When the electrons hit the tungsten target, their kinetic energy is converted to
Correct Answer - heat and x-rays
Control settings can be set lower when using Correct Answer - digital
imaging
Primary Radiation Correct Answer - the one absorbed by the patient
unobstructured, short wave x-ray beams produced by the unit and emitted
from the x-ray tube
Secondary radiation Correct Answer - X-radiation that is created when the
primary beam interacts with matter
Long wave x-ray beams that strike an object (like the patient's face) and are
absorbed by the skin but are not strong enough to penetrate to the image
receptor
still damaging, but less than primary
