EFDA PRACTICE QUESTIONS & 100% CORRECT ANSWERS ACTUAL 2025/2026

EFDA PRACTICE QUESTIONS & 100% CORRECT ANSWERS ACTUAL 2025/2026 In the Federation Dentaire International System for numbering, the first number represents a _________, while the second number represents a _________. - Answer -quadrant, tooth What is the visible portion of the anatomical crown known as? - Answer -the clinical crown The area where the roots divide - Answer -furcation The point or area where approximating teeth in the same arch touch or meet each other is referred to as the ________. - Answer -contact area Where are the TWO purposes of contact areas? - Answer --to keep food from packing between the teeth -help stabilize the dental arches Coronal to the actual division into two or more roots is a concavity that extends to or nearly to the CEJ. This concavity is called - Answer -the furrow What is the HARDEST tissue in the body? - Answer -enamel What cells form enamel? - Answer -ameloblastsThe bulk of the tooth is made up of - Answer -dentin In permanent teeth, the process of enamel formation is completed about ___ years before eruption. - Answer -3 What is the composition of enamel? - Answer -95% inorganic matter, 5% organic matter and water What is the SECOND hardest material in the body? - Answer -dentin What is the composition of dentin? - Answer -70% inorganic, 20% organic, 10% water The three major types of dentin - Answer -primary, secondary, reparative What type of dentin is a DEFENSE reaction to an area of injury? - Answer -reparative dentin What has the HIGHEST fluoride content of all the materialized tissue? - Answer -cementum The two types of cementum - Answer -acellular and cellular What type of cementum ACTIVELY produces new layers of cementum throughout the life of the tooth? - Answer -cellular What teeth have the cusp of Carabelli? - Answer -maxillary first molars The ridge formed by the union of two triangular ridges - Answer - transverse ridge The spillway provides an escape for food from the _______ surface during the mastication (chewing) process. - Answer -occlusalThe uncut tooth structure adjacent to the cavity prep - Answer - ca