Australian Dental Council (ADC) Practice Test 2025 – The All-in-One Guide to Exam Success!

The statement that it is not necessary to include fissures in the occlusal outline when preparing proximal occlusal cavities for deciduous teeth is true when compared to permanent teeth. In the context of deciduous teeth, their anatomical structure and the composition of enamel are quite different compared to permanent teeth.

Deciduous teeth generally have a thinner layer of enamel and a more pronounced curvature in their occlusal surfaces. This means that the fissures, which are often intricate and can be deep in permanent teeth, do not necessarily need to be included in the cavity preparation for primary teeth. The enamel in primary teeth is less dense and more likely to be self-cleansing, thus a simpler cavity outline can effectively accommodate the restorative material without the need for extensive inclusion of fissures.

This contrasts with permanent teeth, where including fissures in the occlusal outline is crucial for providing a sufficient seal and ensuring proper retention of restorative materials. Understanding these differences in preparation techniques is essential for effective treatment planning and achieving optimal outcomes in pediatric dentistry.