Final answer:
Cementum overlaps enamel in the majority of cases at the cementoenamel junction; however, the exact percentage is not specified in the provided reference, and dental sources should be referenced for precise data.
Step-by-step explanation:
During tooth development, cementum overlaps enamel in a majority of cases. This overlap occurs at the cementoenamel junction, where the enamel, which is the outermost layer and the hardest substance in the human body, covers the crown of the tooth. Beneath this, the dentin provides the bulk of the tooth's structure and extends into the root where it is covered by cementum. The cementum is a bone-like layer that works alongside the periodontal ligament to anchor the tooth within the jawbone. The exact percentage of teeth where cementum overlaps the enamel is not specified in any provided reference, and professional dental sources should be consulted for the most accurate data.