How bad is the pain during a dental filling?

Injection a little: A filling shouldn't be painful at all. The dentist will give you an injection of local anesthetic such as Lidocaine or articaine and then the tooth will be anesthetized or "numbed." if you are feeling something during the procedure, let the dentist know and he/she can numb it more. After a filling, it is normal to have a little sensitivity.

Not bad: If you experience pain during a filling procedure, it doesn't necessarily mean something bad has happened. Most of the times it just means that you need a little more anesthetic. If you didn't feel any pain during filling procedures, there would be no need for anesthetic injections.

Minimal to none: Dental fillings are generally done with local anesthetics. It's a common practice to numb teeth that are getting fillings. Therefore, no pain is involved with fillings.

Zero: Once you are numb from the local anesthesia, it should be painless. If you are not sufficiently numb, advise the dentist and more anesthesia can be delivered to get you comfortable. Always speak up !

Should be none: There is no reason to feel anything while you have any dentistry. Everyone is different. Some patients are fine with just "sweet air", while some require local anesthesia. The only thing that you might feel, is a slight pinch when you get an injection, and even then it is unlike the injection that your physician gives you because the tissue is so soft and easily penetrated.