HOSA Dental Terminology Practice

What is the primary feature of dentinogenesis imperfecta?

1. Dentin that is too hard

2. Improper development of dentin

3. Excessive enamel growth

4. Loss of tooth color

The correct answer is: Improper development of dentin

The primary feature of dentinogenesis imperfecta is the improper development of dentin. This genetic disorder affects the formation of dentin, which is the hard tissue beneath the enamel of the tooth. In individuals with dentinogenesis imperfecta, the dentin can be softer, discolored, and may fracture more easily than normal dentin. This condition stems from mutations in the genes responsible for dentin development, leading to structural anomalies in the teeth. In contrast to proper dentin development, excessive enamel growth is not a characteristic of this condition, nor is there a significant focus on the hardness of dentin directly within this disorder. While loss of tooth color can be a visible sign of this condition, it is a secondary result of the main issue, which is the abnormal dentin. Understanding this helps in recognizing how dentinogenesis imperfecta directly impacts tooth structure and integrity.