What effect does decreased bone density have on diffusion of local anesthetic in pediatric patients?

What effect does decreased bone density have on diffusion of local anesthetic in pediatric patients?

• A. More rapid diffusion
• B. Slower diffusion
• C. No change
• D. Diffusion is unpredictable

Answer: (A)

Decreased bone density means the bone is more porous and has larger medullary spaces. In the pediatric maxilla, this reduces the barrier to the anesthetic, allowing it to diffuse more readily from the injection site into bone and toward the nerve that needs to be blocked. The result is a faster onset because the drug can spread through the porous bone and surrounding tissues with less resistance. It’s not about no change or slower diffusion; the porous, less dense bone facilitates quicker diffusion.