Dental Assisting Exam Prep 2026-2027: 320
Practice Questions & Answers | CDA, DANB,
RHS, ICE Test Bank
Description:
Pass your dental assisting exam in 2026/2027 with 320 practice questions covering anatomy,
radiology, pharmacology, and clinical procedures. Complete answer explanations included.
Download the ultimate test bank for CDA, DANB, RHS, and ICE certification success. Start
studying now and ace your exam!
, Dental Assisting Exam 2026-2027: 320 Questions with Answers
SECTION 1: DENTAL ANATOMY AND TOOTH IDENTIFICATION
1. How many teeth comprise a complete permanent dentition?
A. 20
B. 28
C. 32
D. 36
Answer: C. 32
Explanation: The permanent dentition consists of 32 teeth in total, including 8 incisors, 4
canines, 8 premolars, and 12 molars. This complete set typically erupts between the ages of 17
and 21 years, with third molars being the last to emerge.
2. Which teeth are commonly referred to as "eye teeth" in clinical practice?
A. Central incisors
B. Lateral incisors
C. Canines
D. Premolars
Answer: C. Canines
Explanation: Canines are frequently called "eye teeth" due to their anatomical position beneath
the eyes. These teeth are the longest and most stable in the dental arch, featuring a single pointed
cusp designed for cutting and tearing food.
3. Which proximal surface of a tooth is closest to the midline of the dental arch?
A. Distal
B. Mesial
C. Facial
D. Lingual
,Answer: B. Mesial
Explanation: The mesial surface refers to the tooth surface that faces toward the midline of the
dental arch. Each tooth has both mesial and distal proximal surfaces; the mesial aspect faces the
center of the arch while the distal surface faces away from the midline.
4. How many premolars are present in a complete permanent dentition?
A. 4
B. 6
C. 8
D. 10
Answer: C. 8
Explanation: The permanent dentition includes eight premolars, with two premolars located in
each quadrant of the mouth. These teeth, also known as bicuspids, are situated between the
canines and molars and typically have two cusps used for crushing and grinding food.
5. When the mouth is divided into four sections for clinical documentation purposes, these
sections are called:
A. Segments
B. Divisions
C. Quadrants
D. Sections
Answer: C. Quadrants
Explanation: The dental arches are divided into four quadrants: maxillary right, maxillary left,
mandibular right, and mandibular left. This division facilitates systematic examination, treatment
planning, and accurate documentation of dental conditions and procedures.
6. Using the Universal Numbering System, which tooth is designated as #12?
A. Maxillary right first premolar
B. Maxillary left first premolar
, C. Maxillary right second premolar
D. Maxillary left second premolar
Answer: B. Maxillary left first premolar
Explanation: The Universal Numbering System assigns numbers 1-16 to permanent maxillary
teeth, starting from the upper right third molar (#1) and continuing to the upper left third molar
(#16). Tooth #12 corresponds to the maxillary left first premolar.
7. According to the International Standards Organization (ISO) tooth recording system,
which tooth is designated as #25?
A. Maxillary left first premolar
B. Maxillary left second premolar
C. Maxillary right first premolar
D. Mandibular left second premolar
Answer: B. Maxillary left second premolar
Explanation: The ISO/FDI two-digit system designates teeth by quadrant and tooth number
within that quadrant. The first digit (2) represents the maxillary left quadrant, and the second
digit (5) indicates the second premolar.
8. What anatomical structure connects the cementum of a tooth to the surrounding alveolar
bone?
A. Gingival fibers
B. Periodontal ligament
C. Sharpey's fibers
D. Alveolar crest
Answer: B. Periodontal ligament
Explanation: The periodontal ligament is a specialized connective tissue that anchors the tooth
root cementum to the alveolar bone. It consists of collagen fiber bundles that provide tooth
support, absorb occlusal forces, and maintain the tooth in its socket.
Practice Questions & Answers | CDA, DANB,
RHS, ICE Test Bank
Description:
Pass your dental assisting exam in 2026/2027 with 320 practice questions covering anatomy,
radiology, pharmacology, and clinical procedures. Complete answer explanations included.
Download the ultimate test bank for CDA, DANB, RHS, and ICE certification success. Start
studying now and ace your exam!
, Dental Assisting Exam 2026-2027: 320 Questions with Answers
SECTION 1: DENTAL ANATOMY AND TOOTH IDENTIFICATION
1. How many teeth comprise a complete permanent dentition?
A. 20
B. 28
C. 32
D. 36
Answer: C. 32
Explanation: The permanent dentition consists of 32 teeth in total, including 8 incisors, 4
canines, 8 premolars, and 12 molars. This complete set typically erupts between the ages of 17
and 21 years, with third molars being the last to emerge.
2. Which teeth are commonly referred to as "eye teeth" in clinical practice?
A. Central incisors
B. Lateral incisors
C. Canines
D. Premolars
Answer: C. Canines
Explanation: Canines are frequently called "eye teeth" due to their anatomical position beneath
the eyes. These teeth are the longest and most stable in the dental arch, featuring a single pointed
cusp designed for cutting and tearing food.
3. Which proximal surface of a tooth is closest to the midline of the dental arch?
A. Distal
B. Mesial
C. Facial
D. Lingual
,Answer: B. Mesial
Explanation: The mesial surface refers to the tooth surface that faces toward the midline of the
dental arch. Each tooth has both mesial and distal proximal surfaces; the mesial aspect faces the
center of the arch while the distal surface faces away from the midline.
4. How many premolars are present in a complete permanent dentition?
A. 4
B. 6
C. 8
D. 10
Answer: C. 8
Explanation: The permanent dentition includes eight premolars, with two premolars located in
each quadrant of the mouth. These teeth, also known as bicuspids, are situated between the
canines and molars and typically have two cusps used for crushing and grinding food.
5. When the mouth is divided into four sections for clinical documentation purposes, these
sections are called:
A. Segments
B. Divisions
C. Quadrants
D. Sections
Answer: C. Quadrants
Explanation: The dental arches are divided into four quadrants: maxillary right, maxillary left,
mandibular right, and mandibular left. This division facilitates systematic examination, treatment
planning, and accurate documentation of dental conditions and procedures.
6. Using the Universal Numbering System, which tooth is designated as #12?
A. Maxillary right first premolar
B. Maxillary left first premolar
, C. Maxillary right second premolar
D. Maxillary left second premolar
Answer: B. Maxillary left first premolar
Explanation: The Universal Numbering System assigns numbers 1-16 to permanent maxillary
teeth, starting from the upper right third molar (#1) and continuing to the upper left third molar
(#16). Tooth #12 corresponds to the maxillary left first premolar.
7. According to the International Standards Organization (ISO) tooth recording system,
which tooth is designated as #25?
A. Maxillary left first premolar
B. Maxillary left second premolar
C. Maxillary right first premolar
D. Mandibular left second premolar
Answer: B. Maxillary left second premolar
Explanation: The ISO/FDI two-digit system designates teeth by quadrant and tooth number
within that quadrant. The first digit (2) represents the maxillary left quadrant, and the second
digit (5) indicates the second premolar.
8. What anatomical structure connects the cementum of a tooth to the surrounding alveolar
bone?
A. Gingival fibers
B. Periodontal ligament
C. Sharpey's fibers
D. Alveolar crest
Answer: B. Periodontal ligament
Explanation: The periodontal ligament is a specialized connective tissue that anchors the tooth
root cementum to the alveolar bone. It consists of collagen fiber bundles that provide tooth
support, absorb occlusal forces, and maintain the tooth in its socket.
