Interdental branches provide sensory innervation to the PDL of adjacent teeth through which structure?

Interdental branches provide sensory innervation to the PDL of adjacent teeth through which structure?

• A. Alveolar bone
• B. Pulp chamber
• C. Dentin
• D. Lamina dura

Answer: (A)

Interdental branches reach the PDL of adjacent teeth by traveling through the interdental bone in the alveolar process between neighboring sockets. Small foramina in this alveolar bone allow these nerve fibers to enter the periodontal ligament of both teeth, supplying sensation. The other structures—pulp chamber and dentin are parts of the tooth itself, not routes for these nerves, and the lamina dura is simply the dense bone lining the tooth socket rather than the conduit for interdental neural fibers. So the pathway is provided by the alveolar bone between the teeth.

Interdental branches reach the PDL of adjacent teeth by traveling through the interdental bone in the alveolar process between neighboring sockets. Small foramina in this alveolar bone allow these nerve fibers to enter the periodontal ligament of both teeth, supplying sensation. The other structures—pulp chamber and dentin are parts of the tooth itself, not routes for these nerves, and the lamina dura is simply the dense bone lining the tooth socket rather than the conduit for interdental neural fibers. So the pathway is provided by the alveolar bone between the teeth.