Question

Which of the following describes the thin radiopaque line that surrounds the root of tooth #4?

1) Periodontal ligament
2) Lamina dura
3) Alveolar bone
4) Cementum

Answer 1

The radiopaque line that surrounds the root of tooth #4 is the lamina dura, a dense bone line part of the alveolar bone seen on radiographs and provides support with the periodontal ligament.

Step-by-step explanation:

The thin radiopaque line that surrounds the root of tooth #4 is known as the lamina dura. This line represents the dense, radiopaque line of compact bone that is part of the alveolar bone and can be seen surrounding the tooth roots on radiographic images. The lamina dura is closely associated with the periodontal ligament, with which it provides support for the tooth in the alveolar socket. It should not be confused with the cementum, which is the calcified layer covering the root of the tooth, or the periodontal ligament, which is a connective tissue that anchors the cementum of the tooth to the alveolar bone.