CERTIFIED RESTORATIVE FUNCTIONS
DENTAL ASSISTANT (CRFDA) EXAM 2026 Latest
Comprehensive Study Guide with Practice Questions
Restorative Dentistry Review • Verified Answers •
Detailed Rationales • Success Workbook
Component Exam Questions
Anatomy, Morphology and Physiology (AMP) ~40
Impressions (IM) 50
Temporaries (TMP) 50
Isolation (IS) ~50
Sealants (SE) 50
Restorative Functions (RF) 80
SECTION 1: ANATOMY, MORPHOLOGY AND PHYSIOLOGY (AMP)
QUESTION 1
Which of the following is the correct formula for the permanent dentition?
A) 2-1-2--1-2-3
B) 2-1-2--1-2-3
C) 2-1-2--1-2-2
D) 3-1-2--1-2-2
,RATIONALE:
Correct Answer: B) 2-1-2--1-2-3
The dental formula for the permanent dentition is 2-1-2--1-2-3, representing 2
incisors, 1 canine, 2 premolars, and 3 molars in each quadrant. The total number
of permanent teeth is 32. The primary dentition formula is 2-1-0--1-0-2 (20
teeth total). Understanding dental formulas is essential for restorative dental
assistants when charting, identifying teeth, and assisting with treatment planning.
Option A: This is the same formula but the format is less clear; 2-1-2-3 is correct.
Option C: 2-1-2-2 represents only two molars per quadrant (total 28 teeth),
missing the third molars.
Option D: 3-1-2-2 is incorrect; there are not three incisors per quadrant.
QUESTION 2
The most posterior tooth in the permanent dentition is the:
A) Maxillary first molar
B) Mandibular second molar
C) Maxillary third molar
D) Mandibular first molar
RATIONALE:
Correct Answer: C) Maxillary third molar
The maxillary third molar (tooth #1 and #16 in the Universal numbering system) is
the most posterior tooth in the permanent dentition. It is also known as the
"wisdom tooth" and is the last tooth to erupt, typically between ages 17-21. Third
molars are the most commonly congenitally missing teeth and are frequently
impacted.
Option A: The maxillary first molar is mesial to the second and third molars.
Option B: The mandibular second molar is mesial to the third molar.
,Option D: The mandibular first molar is mesial to the second and third molars.
QUESTION 3
The pulp chamber of a tooth contains which of the following?
A) Enamel and dentin
B) Nerves, blood vessels, and connective tissue
C) Cementum and periodontal ligament
D) Gingival tissue
RATIONALE:
Correct Answer: B) Nerves, blood vessels, and connective tissue
The pulp chamber contains the dental pulp, which consists of nerves, blood
vessels, lymphatics, and connective tissue. The pulp provides nourishment to the
tooth, forms dentin (secondary and reparative dentin), and provides sensory
function. Understanding pulp anatomy is critical for restorative dental assistants
when assisting with procedures involving deep caries, pulp capping, and
endodontic treatment.
Option A: Enamel and dentin are hard tissues that surround the pulp chamber.
Option C: Cementum and periodontal ligament are part of the tooth-supporting
structures.
Option D: Gingival tissue is the soft tissue surrounding the tooth.
QUESTION 4
The surface of a tooth that is closest to the midline is the:
A) Mesial surface
B) Distal surface
C) Facial surface
D) Lingual surface
, RATIONALE:
Correct Answer: A) Mesial surface
The mesial surface is the surface of a tooth that is closest to the midline of the
dental arch. The distal surface is the surface away from the midline.
Understanding tooth surfaces is essential for charting, cavity preparation
classification, and communicating with the dentist during restorative procedures.
Option B: The distal surface is away from the midline.
Option C: The facial surface faces the lips or cheeks (labial or buccal).
Option D: The lingual surface faces the tongue.
QUESTION 5
Which of the following teeth typically has the largest pulp chamber?
A) Maxillary central incisor
B) Mandibular first molar
C) Mandibular canine
D) Maxillary second premolar
RATIONALE:
Correct Answer: B) Mandibular first molar
The mandibular first molar typically has the largest pulp chamber of all teeth. It
has five cusps and a large, complex pulp chamber with multiple pulp horns
corresponding to the cusps. This large pulp chamber makes the mandibular first
molar more susceptible to pulpal involvement from deep caries and requires
careful consideration during cavity preparation.
Option A: Maxillary central incisors have relatively small pulp chambers.
Option C: Mandibular canines have smaller pulp chambers than molars.
Option D: Maxillary second premolars have smaller pulp chambers than molars.
QUESTION 6
DENTAL ASSISTANT (CRFDA) EXAM 2026 Latest
Comprehensive Study Guide with Practice Questions
Restorative Dentistry Review • Verified Answers •
Detailed Rationales • Success Workbook
Component Exam Questions
Anatomy, Morphology and Physiology (AMP) ~40
Impressions (IM) 50
Temporaries (TMP) 50
Isolation (IS) ~50
Sealants (SE) 50
Restorative Functions (RF) 80
SECTION 1: ANATOMY, MORPHOLOGY AND PHYSIOLOGY (AMP)
QUESTION 1
Which of the following is the correct formula for the permanent dentition?
A) 2-1-2--1-2-3
B) 2-1-2--1-2-3
C) 2-1-2--1-2-2
D) 3-1-2--1-2-2
,RATIONALE:
Correct Answer: B) 2-1-2--1-2-3
The dental formula for the permanent dentition is 2-1-2--1-2-3, representing 2
incisors, 1 canine, 2 premolars, and 3 molars in each quadrant. The total number
of permanent teeth is 32. The primary dentition formula is 2-1-0--1-0-2 (20
teeth total). Understanding dental formulas is essential for restorative dental
assistants when charting, identifying teeth, and assisting with treatment planning.
Option A: This is the same formula but the format is less clear; 2-1-2-3 is correct.
Option C: 2-1-2-2 represents only two molars per quadrant (total 28 teeth),
missing the third molars.
Option D: 3-1-2-2 is incorrect; there are not three incisors per quadrant.
QUESTION 2
The most posterior tooth in the permanent dentition is the:
A) Maxillary first molar
B) Mandibular second molar
C) Maxillary third molar
D) Mandibular first molar
RATIONALE:
Correct Answer: C) Maxillary third molar
The maxillary third molar (tooth #1 and #16 in the Universal numbering system) is
the most posterior tooth in the permanent dentition. It is also known as the
"wisdom tooth" and is the last tooth to erupt, typically between ages 17-21. Third
molars are the most commonly congenitally missing teeth and are frequently
impacted.
Option A: The maxillary first molar is mesial to the second and third molars.
Option B: The mandibular second molar is mesial to the third molar.
,Option D: The mandibular first molar is mesial to the second and third molars.
QUESTION 3
The pulp chamber of a tooth contains which of the following?
A) Enamel and dentin
B) Nerves, blood vessels, and connective tissue
C) Cementum and periodontal ligament
D) Gingival tissue
RATIONALE:
Correct Answer: B) Nerves, blood vessels, and connective tissue
The pulp chamber contains the dental pulp, which consists of nerves, blood
vessels, lymphatics, and connective tissue. The pulp provides nourishment to the
tooth, forms dentin (secondary and reparative dentin), and provides sensory
function. Understanding pulp anatomy is critical for restorative dental assistants
when assisting with procedures involving deep caries, pulp capping, and
endodontic treatment.
Option A: Enamel and dentin are hard tissues that surround the pulp chamber.
Option C: Cementum and periodontal ligament are part of the tooth-supporting
structures.
Option D: Gingival tissue is the soft tissue surrounding the tooth.
QUESTION 4
The surface of a tooth that is closest to the midline is the:
A) Mesial surface
B) Distal surface
C) Facial surface
D) Lingual surface
, RATIONALE:
Correct Answer: A) Mesial surface
The mesial surface is the surface of a tooth that is closest to the midline of the
dental arch. The distal surface is the surface away from the midline.
Understanding tooth surfaces is essential for charting, cavity preparation
classification, and communicating with the dentist during restorative procedures.
Option B: The distal surface is away from the midline.
Option C: The facial surface faces the lips or cheeks (labial or buccal).
Option D: The lingual surface faces the tongue.
QUESTION 5
Which of the following teeth typically has the largest pulp chamber?
A) Maxillary central incisor
B) Mandibular first molar
C) Mandibular canine
D) Maxillary second premolar
RATIONALE:
Correct Answer: B) Mandibular first molar
The mandibular first molar typically has the largest pulp chamber of all teeth. It
has five cusps and a large, complex pulp chamber with multiple pulp horns
corresponding to the cusps. This large pulp chamber makes the mandibular first
molar more susceptible to pulpal involvement from deep caries and requires
careful consideration during cavity preparation.
Option A: Maxillary central incisors have relatively small pulp chambers.
Option C: Mandibular canines have smaller pulp chambers than molars.
Option D: Maxillary second premolars have smaller pulp chambers than molars.
QUESTION 6
