Dental related Hering Loss

[Ross Alexander Hendler <rah232@xxxxxxx>]

I have a friend who had a cavity filled over a month ago. They used a common drill but the day after and since
she complains of a buzzing noise that she hears, (possibly tinnitus). The dentist gave her large amounts of
numbing medicine and she believes this could be related, not sure about this though.

Has anyone heard of anything like this? I have advised that she see an otolaryngologist, however she has no
medical insurance and wants to research this before she goes in to spend a bundle. Please let me know if you
know of anything or any related research.

Thank you,

Ross