Australian Dental Council (ADC) Test 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer highlights the relationship between the different types of teeth in the mandible regarding their periodontal surface areas. The ranking in the answer is based on the general anatomy and function of these teeth.

Canines have a single prominent root which is relatively thick and provides a significant surface area for periodontal attachment compared to incisors. This dental structure is designed for tearing food, which contributes to their greater periodontal surface area.

Lateral incisors, while smaller than central incisors and having less root structure, generally have a larger surface area compared to central incisors. This is due to the morphology where the root shape and overall dimensions can affect the attachment of periodontal tissues.

In contrast, central incisors are typically the smallest in terms of root thickness and clinical crown size among the three. Their slender nature leads to a reduced periodontal surface area compared to canines and lateral incisors.

Understanding this hierarchy is essential for grasping concepts related to periodontal health and the relationship between tooth morphology and periodontal attachment. This ranking aligns with common morphological observations in the dental anatomy relevant to periodontal care and treatment planning.