Each of the following will decrease the ability of dental local anesthetic to penetrate the nerve fiber except one.Which is the exception?

Question

Quizplus · Accepted Answer

The free-base form of local anesthetic is fat soluble and penetrates nerve tissue.Local inflammation causes a decrease in the pH of the tissue extracellular fluid and drives more of the local anesthetic into the ionized form,which is less able to penetrate the nerve.Edema or fluid in tissue dilutes the local anesthetic,which disperses in a 360 degree pattern from the location of the injection.Infection lowers the pH causing the local anesthetic to be associated with a hydrogen ion and making it hydrophilic rather than lipophilic.

Each of the Following Will Decrease the Ability of Dental