National Dental Assisting Examining Board (NDAEB) Practice Exam

What is a critical factor for the eruption of permanent teeth?

1. Raising the primary teeth

2. Alignment of the dental arch

3. Shedding of primary teeth

4. Fluoride treatment

The correct answer is: Shedding of primary teeth

The shedding of primary teeth is indeed a critical factor for the eruption of permanent teeth. This natural process, known as exfoliation, allows the permanent teeth to move into their designated positions in the dental arch. As primary teeth loosen and fall out, they create space for the permanent teeth, which are typically larger and take their place in the same sequence as the primary teeth. The timing and process of shedding are crucial because if primary teeth remain present for too long, they can hinder the normal eruption pathway of the permanent teeth, potentially leading to crowding or misalignment issues. Additionally, the dental alveolar bone and the surrounding tissues respond to the loss of primary teeth, helping to facilitate the eruption of the permanent successors. In contrast, while factors such as the alignment of the dental arch, the presence of fluoride treatment, and the status of primary teeth can influence overall dental health, they do not play a direct role in the process of when or how permanent teeth erupt in relation to the shedding of primary teeth.