HOSA Dental Terminology Practice

Which class of tooth fracture includes dentin but no pulp tissue?

1. Class I

2. Class II

3. Class III

4. Class IV

The correct answer is: Class II

The classification of tooth fractures is based on how deep the fracture extends into the tooth structure. Class II fractures involve enamel and dentin but do not involve the pulp chamber. This means that while there is damage to the tooth that exposes the lower layers, the vital pulp tissue remains intact, allowing for the possibility of minor restorative approaches rather than more extensive treatments like root canals. In contrast, other classifications such as Class I typically involve only the enamel, while Class III and IV fractures extend deeper into the tooth, usually involving associated pulp damage or loss of tooth structure leading to more severe implications for the tooth's health and function. Hence, Class II is the correct classification, indicating that while the fracture is significant, the pulp itself remains unaffected, preserving the tooth's vitality.