Hottel EFDA Combined Questions | 2025/2026
Edition | 100% Verified Correct Answers
Expanded Function Dental Auxiliary (EFDA) — Hottel EFDA Comprehensive Review | Dental
Anatomy, Restorative Procedures, Chairside Assisting, Infection Control, Dental Materials, and
Clinical Practice Standards | Expert-Verified Q&A | Certification-Ready
Introduction
This document contains the complete Hottel EFDA Combined Questions and Answers for the
2025/2026 edition. It covers all key topics required for EFDA certification, including operative
dentistry, impression techniques, restorative material application, infection prevention
protocols, and chairside clinical skills. All answers are 100% verified to ensure accuracy and
confidence in both theoretical knowledge and practical application.
Answer Format
All correct answers are shown in bold and green, accompanied by detailed explanations that
reinforce understanding of EFDA clinical competencies, procedural steps, and patient safety
standards.
Hottel EFDA Combined Q&A | Verified 2025/2026 Content | Exam-Aligned |
Designed for Excellence in Dental Assisting Practice
Question 1
In the Federation Dentaire Internationale (FDI) system, what is the number for a permanent
maxillary right first molar?
A) 11
B) 16
C) 21
D) 26
B) 16
Explanation: The FDI system assigns 16 to the upper right first molar based on quadrant and
tooth numbering.
Question 2
Which tooth numbering system does NOT use letters for primary dentition?
A) Universal System
B) Palmer Notation
C) FDI Numbering System
D) ISO System
, C) FDI Numbering System
Explanation: FDI uses numbers (e.g., 51-55 for upper right primary teeth) instead of letters.
Question 3
What is visible on a tooth with extensive gingival recession below the cementoenamel junction?
A) Clinical crown only
B) Anatomical and clinical crown
C) Root surface only
D) Enamel only
B) Anatomical and clinical crown
Explanation: Recession exposes both the anatomical crown and part of the clinical crown.
Question 4
What comprises the periodontium?
A) Enamel and dentin
B) Gingiva, alveolar process, periodontal ligament, and cementum
C) Pulp and root canal
D) Bone and muscle
B) Gingiva, alveolar process, periodontal ligament, and cementum
Explanation: These structures support and anchor the teeth.
Question 5
Where is enamel thickest on a tooth?
A) Cervical region
B) Middle third
C) Incisal/occlusal surface
D) Root area
C) Incisal/occlusal surface
Explanation: Enamel is thickest at the biting or cutting edges.
Question 6
What is the composition of enamel approximately?
A) 70% inorganic, 20% organic, 10% water
B) 95.5% inorganic, 0.5% organic, 4% water
C) 50% inorganic, 30% organic, 20% water
D) 80% inorganic, 10% organic, 10% water
B) 95.5% inorganic, 0.5% organic, 4% water
Explanation: Enamel is predominantly mineralized for strength.
Question 7
Which instrument is used to place amalgam into a cavity preparation?
A) Explorer
B) Compactor
C) Carver
D) Burnisher
B) Compactor
Explanation: Compactors pack restorative material into the preparation.
Edition | 100% Verified Correct Answers
Expanded Function Dental Auxiliary (EFDA) — Hottel EFDA Comprehensive Review | Dental
Anatomy, Restorative Procedures, Chairside Assisting, Infection Control, Dental Materials, and
Clinical Practice Standards | Expert-Verified Q&A | Certification-Ready
Introduction
This document contains the complete Hottel EFDA Combined Questions and Answers for the
2025/2026 edition. It covers all key topics required for EFDA certification, including operative
dentistry, impression techniques, restorative material application, infection prevention
protocols, and chairside clinical skills. All answers are 100% verified to ensure accuracy and
confidence in both theoretical knowledge and practical application.
Answer Format
All correct answers are shown in bold and green, accompanied by detailed explanations that
reinforce understanding of EFDA clinical competencies, procedural steps, and patient safety
standards.
Hottel EFDA Combined Q&A | Verified 2025/2026 Content | Exam-Aligned |
Designed for Excellence in Dental Assisting Practice
Question 1
In the Federation Dentaire Internationale (FDI) system, what is the number for a permanent
maxillary right first molar?
A) 11
B) 16
C) 21
D) 26
B) 16
Explanation: The FDI system assigns 16 to the upper right first molar based on quadrant and
tooth numbering.
Question 2
Which tooth numbering system does NOT use letters for primary dentition?
A) Universal System
B) Palmer Notation
C) FDI Numbering System
D) ISO System
, C) FDI Numbering System
Explanation: FDI uses numbers (e.g., 51-55 for upper right primary teeth) instead of letters.
Question 3
What is visible on a tooth with extensive gingival recession below the cementoenamel junction?
A) Clinical crown only
B) Anatomical and clinical crown
C) Root surface only
D) Enamel only
B) Anatomical and clinical crown
Explanation: Recession exposes both the anatomical crown and part of the clinical crown.
Question 4
What comprises the periodontium?
A) Enamel and dentin
B) Gingiva, alveolar process, periodontal ligament, and cementum
C) Pulp and root canal
D) Bone and muscle
B) Gingiva, alveolar process, periodontal ligament, and cementum
Explanation: These structures support and anchor the teeth.
Question 5
Where is enamel thickest on a tooth?
A) Cervical region
B) Middle third
C) Incisal/occlusal surface
D) Root area
C) Incisal/occlusal surface
Explanation: Enamel is thickest at the biting or cutting edges.
Question 6
What is the composition of enamel approximately?
A) 70% inorganic, 20% organic, 10% water
B) 95.5% inorganic, 0.5% organic, 4% water
C) 50% inorganic, 30% organic, 20% water
D) 80% inorganic, 10% organic, 10% water
B) 95.5% inorganic, 0.5% organic, 4% water
Explanation: Enamel is predominantly mineralized for strength.
Question 7
Which instrument is used to place amalgam into a cavity preparation?
A) Explorer
B) Compactor
C) Carver
D) Burnisher
B) Compactor
Explanation: Compactors pack restorative material into the preparation.
