Dental Assistant Practice Exam

What is the primary function of the periodontal ligament?

1. Cushions and connects the tooth to the cementum

2. Provides vascular support to the gum tissue

3. Connects the tooth to the alveolar socket

4. Stimulates production of saliva in the mouth

The correct answer is: Connects the tooth to the alveolar socket

The primary function of the periodontal ligament is to connect the tooth to the alveolar socket, which is the bony structure that holds the tooth in place within the jaw. This ligament is composed of connective tissue fibers that attach the cementum of the tooth root to the alveolar bone. This connection is crucial for the stability of the tooth, allowing it to withstand the forces of chewing while also enabling a small degree of movement, which is essential for healthy tooth function and function. The periodontal ligament also plays a role in the sensory perception of pressure and pain, aiding in the protective response of the teeth while being functional in daily activities like eating and speaking. The other options, while related to dental anatomy, do not primarily describe the function of the periodontal ligament. The cushioning and connecting function mentioned in the first choice can refer to the role of the periodontal ligament but does not encompass its main purpose of anchoring the tooth to the socket. Providing vascular support relates more to the gum tissue and involves different structures, and stimulating saliva production is associated with the salivary glands rather than the periodontal ligament itself. Thus, the primary and most accurate role of the periodontal ligament remains its crucial connection between the tooth and the alveolar socket.