NDAEB CORE 2026 EXAM TEST QUESTIONS AND ANSWERS
GRADED A+
✔✔The four types of elastomeric material are ________, _______, silicone, and
polysiloxane. - ✔✔polysulfide
polyether
✔✔Polysulfide material is a ______ _______ that has a ____ _____ and can ____
______. - ✔✔rubber base
strong odour
stain clothing
✔✔Polyether provides better _______ properties than _________ and less dimensional
change than _______. - ✔✔mechanical Polysulfide
Silicone
✔✔Silicone's ______ is much less than Polysuflides but the dimensional stability is
________. - ✔✔deformation
greater
✔✔Polysiloxane has a high ______ ______ and low ____ ____. - ✔✔dimensional
stability
tear resistance
✔✔What is the most commonly used material for a bite registration? - ✔✔Polysiloxane
bite registration paste
✔✔What tray is used when ZOE bite registration paste is applied? - ✔✔Gauze tray
✔✔How is light body placed around a tooth? - ✔✔Extruder with tip/ COE syringe
✔✔What are the 3 major components of an X-ray beam? - ✔✔1. Control Panel-contains
regulating devices
2. Extension arm (Bracket)-enables tube head to be positioned
3. Tube Head-contains x-ray tube where x-rays are generated
✔✔Factors that affect the quality of the x-ray beam - ✔✔- voltage
- kilo-voltage peak ( kvp )
- density
- contrast exposure time
✔✔Factors that affect the quantity of the x-ray beam - ✔✔- Amperage (A)
- Milliamperage (mA)
- Milliampere-Seconds(mAs)
, - Density and Milliamperage
- Exposure time and Milliamperage
✔✔Composition of dental x-ray film - ✔✔lead coil, radiograph film, black paper
✔✔Types of digital imaging receptors - ✔✔Direct & Indirect
✔✔What do you call the solid state sensor that contains an x-ray sensitive silicon chip
with an electronic circuit embedded in the silicon? - ✔✔Direct digital imaging
✔✔What commonly used Direct digital receptor, used in variety of other Imaging
devices like fax, telescope etch. - ✔✔Charge coupled Device (CCD)
✔✔What is the type of Indirect Imaging system, where the imaging receptor is a thin
flexible plate, same as the size of conventional x-ray film - ✔✔Phosphor Storage Plate
(PSP)
✔✔In digital radiography, what replaces the intra-oral film? - ✔✔CCD
✔✔what digital technique requires scanning of image receptors? - ✔✔Phosphor storage
plate
✔✔What is the anatomical landmark in between the roots of the maxillary central
incisors? Is it radiopaque or radiolucent? - ✔✔Incisive foramen
radiolucent
✔✔What is the anatomical landmark above the maxillary central incisors? Is it
radiopaque or radiolucent? - ✔✔Superior foramina
radiolucent
✔✔On an anterior maxillary pa image, the ______ _______ appears as a radiolucent
area between the maxillary canine and lateral incisor. - ✔✔Lateral Fossa
✔✔What is the anatomical landmark on a PA film that extends from the alveolar bone
between the maxillary central incisors to the posterior hard palate. It is a radiolucent
line. - ✔✔Median Palatal Suture
✔✔What is the anatomical landmark for an anterior maxillary pa image, the nasal cavity
appears as large radiolucent area superior to the maxillary incisors. - ✔✔Nasal Cavity
✔✔What is the anatomical landmark for an anterior maxillary pa image, the nasal
septum appears as a vertical radiopaque partition that divides the nasal cavity. -
✔✔Nasal Septum
GRADED A+
✔✔The four types of elastomeric material are ________, _______, silicone, and
polysiloxane. - ✔✔polysulfide
polyether
✔✔Polysulfide material is a ______ _______ that has a ____ _____ and can ____
______. - ✔✔rubber base
strong odour
stain clothing
✔✔Polyether provides better _______ properties than _________ and less dimensional
change than _______. - ✔✔mechanical Polysulfide
Silicone
✔✔Silicone's ______ is much less than Polysuflides but the dimensional stability is
________. - ✔✔deformation
greater
✔✔Polysiloxane has a high ______ ______ and low ____ ____. - ✔✔dimensional
stability
tear resistance
✔✔What is the most commonly used material for a bite registration? - ✔✔Polysiloxane
bite registration paste
✔✔What tray is used when ZOE bite registration paste is applied? - ✔✔Gauze tray
✔✔How is light body placed around a tooth? - ✔✔Extruder with tip/ COE syringe
✔✔What are the 3 major components of an X-ray beam? - ✔✔1. Control Panel-contains
regulating devices
2. Extension arm (Bracket)-enables tube head to be positioned
3. Tube Head-contains x-ray tube where x-rays are generated
✔✔Factors that affect the quality of the x-ray beam - ✔✔- voltage
- kilo-voltage peak ( kvp )
- density
- contrast exposure time
✔✔Factors that affect the quantity of the x-ray beam - ✔✔- Amperage (A)
- Milliamperage (mA)
- Milliampere-Seconds(mAs)
, - Density and Milliamperage
- Exposure time and Milliamperage
✔✔Composition of dental x-ray film - ✔✔lead coil, radiograph film, black paper
✔✔Types of digital imaging receptors - ✔✔Direct & Indirect
✔✔What do you call the solid state sensor that contains an x-ray sensitive silicon chip
with an electronic circuit embedded in the silicon? - ✔✔Direct digital imaging
✔✔What commonly used Direct digital receptor, used in variety of other Imaging
devices like fax, telescope etch. - ✔✔Charge coupled Device (CCD)
✔✔What is the type of Indirect Imaging system, where the imaging receptor is a thin
flexible plate, same as the size of conventional x-ray film - ✔✔Phosphor Storage Plate
(PSP)
✔✔In digital radiography, what replaces the intra-oral film? - ✔✔CCD
✔✔what digital technique requires scanning of image receptors? - ✔✔Phosphor storage
plate
✔✔What is the anatomical landmark in between the roots of the maxillary central
incisors? Is it radiopaque or radiolucent? - ✔✔Incisive foramen
radiolucent
✔✔What is the anatomical landmark above the maxillary central incisors? Is it
radiopaque or radiolucent? - ✔✔Superior foramina
radiolucent
✔✔On an anterior maxillary pa image, the ______ _______ appears as a radiolucent
area between the maxillary canine and lateral incisor. - ✔✔Lateral Fossa
✔✔What is the anatomical landmark on a PA film that extends from the alveolar bone
between the maxillary central incisors to the posterior hard palate. It is a radiolucent
line. - ✔✔Median Palatal Suture
✔✔What is the anatomical landmark for an anterior maxillary pa image, the nasal cavity
appears as large radiolucent area superior to the maxillary incisors. - ✔✔Nasal Cavity
✔✔What is the anatomical landmark for an anterior maxillary pa image, the nasal
septum appears as a vertical radiopaque partition that divides the nasal cavity. -
✔✔Nasal Septum
