NBDHE 2025 Exam Questions and
Answers 100% Pass
Which hepatitis needs another hep to be present? - ANSWER-Hep D needs Hep
B
*Hep B is inflammation of the liver- bloody/other body fluid
What is Class 1 mobility? - ANSWER-Slight- up to 1 mm horizontal
What is Class 2 mobility? - ANSWER-Moderate- 1 to 2 mm horizontal
What is Class 3 mobility? - ANSWER-Severe- > greater than 2 mm horizontal OR
vertical
What do you need to do to delay the setting time of gypsum? - ANSWER-Borax
can be added to the mix
increasing water
slow mixing
What is the term for "a force exerted to stretch a material to the point of fracture"?
- ANSWER-Tensile strength
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,What is malleability? - ANSWER-Malleability is a materials capacity to be shapped
by force or pressure
High copper amalgam restorations should contain no more than WHAT % of
mercury? - ANSWER-no more than 50%
What is the purpose of triclosan in dentifricies? - ANSWER-antimicrobial agent
Why is pyrophosphates added to commercial dentifrices preparations? -
ANSWER-To prevent tarter accumulation
An amalgam is an alloy of what 4 things? - ANSWER-silver, copper, tin, and zinc
Where must essential amino acids come from? - ANSWER-food
How many essential amino acids are there? - ANSWER-9
Which fat-soluble vitamin is synthesized by intestinal bacterial flora? - ANSWER-
Vitamin D
What is the active ingredient in TARTER control tooth paste? - ANSWER-
pyrophosphates
What is the active ingredient in GUM CARE toothpaste? - ANSWER-Triclosan
Define gelation - ANSWER-Gelation is the process by which solidification by the
cold occurs
What is the difference between a base and a liner? - ANSWER-A base is used to
INSULATE and PROTECT the pulp
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, whereas a liner is used to SEAL and/or MEDICATE the pulp
How is a cantilevered bridge can be easily identified radiographically? - ANSWER-
It is only supported on one side, the Pontic is anchored by a SINGLE abutment
What are the primary cells involved in acute inflammation? - ANSWER-
Neutrophils (or PMNs). They are also the FIRST cell to emigrate to the site of
injury
Where are sharpens fibers found? - ANSWER-from cementum to alveolar bone
Define fenestration - ANSWER-"window" of a bone loss on facial/lingual aspect,
exposed root
Define dehiscence - ANSWER-V-shaped (like recession)
What is the primary function of a neutrophil? - ANSWER-Phagocytosis
What is the acquired pellicle formed by? - ANSWER-Salivary glycoproteins
The movement of cells to a site of inflammation is known as: - ANSWER-
Chemotaxis
Which hep involves fecal matter? - ANSWER-Hep A and HEV
What makes up the periodontium? - ANSWER-PDL, alveolar bone, cementum,
gingiva
How many stage are there in fibrous repair? - ANSWER-4 stages:
1. blood clotting
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Answers 100% Pass
Which hepatitis needs another hep to be present? - ANSWER-Hep D needs Hep
B
*Hep B is inflammation of the liver- bloody/other body fluid
What is Class 1 mobility? - ANSWER-Slight- up to 1 mm horizontal
What is Class 2 mobility? - ANSWER-Moderate- 1 to 2 mm horizontal
What is Class 3 mobility? - ANSWER-Severe- > greater than 2 mm horizontal OR
vertical
What do you need to do to delay the setting time of gypsum? - ANSWER-Borax
can be added to the mix
increasing water
slow mixing
What is the term for "a force exerted to stretch a material to the point of fracture"?
- ANSWER-Tensile strength
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 1
,What is malleability? - ANSWER-Malleability is a materials capacity to be shapped
by force or pressure
High copper amalgam restorations should contain no more than WHAT % of
mercury? - ANSWER-no more than 50%
What is the purpose of triclosan in dentifricies? - ANSWER-antimicrobial agent
Why is pyrophosphates added to commercial dentifrices preparations? -
ANSWER-To prevent tarter accumulation
An amalgam is an alloy of what 4 things? - ANSWER-silver, copper, tin, and zinc
Where must essential amino acids come from? - ANSWER-food
How many essential amino acids are there? - ANSWER-9
Which fat-soluble vitamin is synthesized by intestinal bacterial flora? - ANSWER-
Vitamin D
What is the active ingredient in TARTER control tooth paste? - ANSWER-
pyrophosphates
What is the active ingredient in GUM CARE toothpaste? - ANSWER-Triclosan
Define gelation - ANSWER-Gelation is the process by which solidification by the
cold occurs
What is the difference between a base and a liner? - ANSWER-A base is used to
INSULATE and PROTECT the pulp
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 2
, whereas a liner is used to SEAL and/or MEDICATE the pulp
How is a cantilevered bridge can be easily identified radiographically? - ANSWER-
It is only supported on one side, the Pontic is anchored by a SINGLE abutment
What are the primary cells involved in acute inflammation? - ANSWER-
Neutrophils (or PMNs). They are also the FIRST cell to emigrate to the site of
injury
Where are sharpens fibers found? - ANSWER-from cementum to alveolar bone
Define fenestration - ANSWER-"window" of a bone loss on facial/lingual aspect,
exposed root
Define dehiscence - ANSWER-V-shaped (like recession)
What is the primary function of a neutrophil? - ANSWER-Phagocytosis
What is the acquired pellicle formed by? - ANSWER-Salivary glycoproteins
The movement of cells to a site of inflammation is known as: - ANSWER-
Chemotaxis
Which hep involves fecal matter? - ANSWER-Hep A and HEV
What makes up the periodontium? - ANSWER-PDL, alveolar bone, cementum,
gingiva
How many stage are there in fibrous repair? - ANSWER-4 stages:
1. blood clotting
COPYRIGHT 2025 ALL RIGHTS RESERVED, TRUSTED AND VERIFIED 3
