I have been asked many times about the number of injections given and whether it is OK or not?
Let us start with the basics, it is not the number of times that you have been"given the needle" but for safety it is the the quantity (in cc) of local anesthetic that you are actually being given. Every dentist can calculate how much of a certain material he/her can give you before you reach unsafe levels (toxic levels). The amounts that can be given depending on the size and weight of the patient, also whether a child or adult and your general health situation. Your dentist will know how much he can give you in order to keep you safe. As to how many injections, that is another story. Some dentist go in quite aggressively and in 1 "shot" freeze you up. This gets you frozen quickly but sometimes you might be seeing stars. When I "freeze" a child I can take up to 4 "shots". The first one a quick short prick, generally not felt, but it freezes the area. Then another one slightly deeper placing more material and so on. Throughout we have only used one cartridge or less of material. I think you get the idea. Also the number of injections may be related to technique, the length of the procedure and the size of the area being worked on, also whether the area is "frozen" enough or perhaps some extra needs to be added.
In general, your dentist will always do his best to make you comfortable during any procedure he is doing. Sometimes this may involve 1 " shot" and sometimes multiple "shots". Don't bother counting, it will not be helpful to you. If you do have a question, always feel comfortable to ask your dentist. I am sure he/she will be more than happy to explain to you any questions that you may have.
All the best
Dr. Ron Barzilay
enjoying dentistry in Hamilton Ontario