Pediatric Dentistry 1 Practice Exam 2026 - Free Pediatric Dentistry Practice Questions and Study Guide

Ectodermal dysplasia is associated with a variety of developmental defects affecting the ectoderm, which contributes to skin, hair, nails, and teeth formation. One of the hallmark traits of certain types of ectodermal dysplasia is the presence of conical-shaped teeth, often referred to as "peg" teeth. This condition is a result of the abnormal development of tooth buds, leading to variations in tooth size and shape.

The other conditions mentioned have distinct features that do not primarily include conical-shaped teeth. For example, amelogenesis imperfecta involves the underdevelopment or abnormal formation of enamel, leading to discolored or irregular teeth rather than a consistent shape like conical teeth. Gemination refers to the incomplete division of a tooth bud, resulting in a tooth that looks larger or has an extra cusp, but it does not typically result in conical teeth. Dentinogenesis imperfecta affects the formation of dentin, which can lead to weak teeth that may appear discolored or be prone to fracture, but it also does not specifically result in conical tooth shapes. Therefore, ectodermal dysplasia is correctly identified as the condition characterized by having conical-shaped teeth.