HOSA Dental Terminology Practice

What is the dentinocemental junction?

1. The junction where the enamel and dentin meet

2. A location in the root where dentin joins cementum

3. The area where the gums meet the teeth

4. The surface area of the tooth closest to the tongue

The correct answer is: A location in the root where dentin joins cementum

The dentinocemental junction is specifically the area where the dentin, which is the hard tissue beneath the enamel of a tooth, meets the cementum, the substance that covers the roots of the teeth. This junction is critical for the structural integrity of the tooth, as it helps anchor the tooth within the periodontal ligament and ultimately supports the tooth's position within the oral cavity. Understanding this junction is essential for dental professionals when considering both restorative dentistry and the treatment of any periodontal diseases, as it can impact the overall health of the tooth and surrounding structures. The other options describe different parts and relationships within the tooth structure but do not accurately define the dentinocemental junction. For example, the area where enamel and dentin meet pertains to the enamel-dentin junction, which is distinct from the junction that involves cementum. Additionally, the gums meeting the teeth refer to the gingival margin, while the surface area of the tooth closest to the tongue relates to the lingual surface of the teeth. Each of these structures has its unique importance in oral health but does not define the dentinocemental junction itself.