PA EFDA Exam 2026 Questions and
Answers
What is the smeer layer? - Correct answer-Layer of debris from a prep
How do you remove the smeer layer? - Correct answer-Etching
Why do we use etch? - Correct answer-To open the dentinal tubules
What is the most common technique for stain removal? - Correct answer-Coronal
polishing
A rotary cutting instrument made from either steel or tungsten carbide? - Correct
answer-Bur
What are the three parts of a dental hand instrument? - Correct answer-Handle,
Shank, and working end
Where is the freshly mixed amalgam placed after titration of the material? -
Correct answer-Amalgam Well
_________ is a sealant material that does not contain filler particles - Correct
answer-unfilled resin
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What happens in the body when you consume fluoride? - Correct answer-1.
Stomach absorbs it.
2. Bones & teeth absorb what it needs
3. Remainder is passed when urinating
A complete removal of calculus, debris, stain, & plaque from teeth - Correct
answer-prophylaxis
Voluntary standards of behavior established by a profession? - Correct answer-code
of ethics
What is the visible portion of the anatomical crown known as? - Correct answer-
The clinical crown
What is the optimal fluoride level? - Correct answer-0.7 ppm (mg/L)
The area where the roots divide - Correct answer-Furcation
Stains that occur on the external surface of the teeth may be removed by polishing
of what? - Correct answer-Extrinsic stain
Disturbances at any age of dental development may cause a wide variety of what? -
Correct answer-Anomalies (abnormalities)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, When the dentist must be in the dental office area but not necessarily present in the
same treatment room as the EFDA; And the dentist must be available to evaluate
the assistants procedure. - Correct answer-Indirect Supervision
Sealants firmly adhere to the tooth surface because of what? - Correct answer-
Mechanical Retention
What is the difference between filled and unfilled sealants with regard to retention
rates? - Correct answer-No difference
Provisional coverage is usually made of what? - Correct answer-Acrylic resin
The _______ is an internal wall of a cavity prep that is parallel to the long axis of
the tooth - Correct answer-Axial Wall
_______ is an individual who has been examined, diagnosed, and treatment
planned by the dentist. - Correct answer-Patient of Record
What is the main cause of sealant failure? - Correct answer-Moisture/saliva
contamination
_______ gives the person the legal right to practice in a specific state - Correct
answer-Licensure
Occurs when calcium and phosphate dissolve from hydroxyapatite crystals in the
enamel - Correct answer-demineralization
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
Answers
What is the smeer layer? - Correct answer-Layer of debris from a prep
How do you remove the smeer layer? - Correct answer-Etching
Why do we use etch? - Correct answer-To open the dentinal tubules
What is the most common technique for stain removal? - Correct answer-Coronal
polishing
A rotary cutting instrument made from either steel or tungsten carbide? - Correct
answer-Bur
What are the three parts of a dental hand instrument? - Correct answer-Handle,
Shank, and working end
Where is the freshly mixed amalgam placed after titration of the material? -
Correct answer-Amalgam Well
_________ is a sealant material that does not contain filler particles - Correct
answer-unfilled resin
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What happens in the body when you consume fluoride? - Correct answer-1.
Stomach absorbs it.
2. Bones & teeth absorb what it needs
3. Remainder is passed when urinating
A complete removal of calculus, debris, stain, & plaque from teeth - Correct
answer-prophylaxis
Voluntary standards of behavior established by a profession? - Correct answer-code
of ethics
What is the visible portion of the anatomical crown known as? - Correct answer-
The clinical crown
What is the optimal fluoride level? - Correct answer-0.7 ppm (mg/L)
The area where the roots divide - Correct answer-Furcation
Stains that occur on the external surface of the teeth may be removed by polishing
of what? - Correct answer-Extrinsic stain
Disturbances at any age of dental development may cause a wide variety of what? -
Correct answer-Anomalies (abnormalities)
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, When the dentist must be in the dental office area but not necessarily present in the
same treatment room as the EFDA; And the dentist must be available to evaluate
the assistants procedure. - Correct answer-Indirect Supervision
Sealants firmly adhere to the tooth surface because of what? - Correct answer-
Mechanical Retention
What is the difference between filled and unfilled sealants with regard to retention
rates? - Correct answer-No difference
Provisional coverage is usually made of what? - Correct answer-Acrylic resin
The _______ is an internal wall of a cavity prep that is parallel to the long axis of
the tooth - Correct answer-Axial Wall
_______ is an individual who has been examined, diagnosed, and treatment
planned by the dentist. - Correct answer-Patient of Record
What is the main cause of sealant failure? - Correct answer-Moisture/saliva
contamination
_______ gives the person the legal right to practice in a specific state - Correct
answer-Licensure
Occurs when calcium and phosphate dissolve from hydroxyapatite crystals in the
enamel - Correct answer-demineralization
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
