HOSA Dental Terminology Practice 2025 - Free Dental Terminology Practice Questions and Study Guide

The term "ectopic arrangement" refers to the abnormal positioning of a tooth during the eruption process, meaning the tooth erupts in a location that is not typical or expected. This results in a situation where the tooth may come in at an angle or in a position that misaligns with adjacent teeth. This can lead to functional issues such as difficulty chewing, as well as cosmetic concerns.

The other terms provided describe different dental conditions. Anodontia refers to the complete absence of teeth, which is a significant developmental anomaly. Fusion of teeth pertains to the joining of two adjacent teeth, resulting in a single larger tooth structure, which alters the dental arch. Hypodontia involves the partial absence of teeth, typically meaning some teeth are missing at birth. Understanding these terms helps to recognize how ectopic arrangements specifically involve misplacement rather than total absence or structural alterations of teeth.