Hi susieq,

There are several reasons why a sinus would be perforated during the prep for the dental implant and it is also not uncommon for this to happen.

What tooth in your upper arch was being replaced by the implant?
How long ago was that tooth extracted?
Had that tooth been root canaled?
Do you have periodontal disease?
Did the dentist do a pre op dental ct scan?
Are you a smoker?

Have you been back to see the dentist since this happened? Did he take an xray... what was his recommendation? Did he prescribe antibiotics?

The floor of the maxillary sinus can sit very low and close to the roots of the upper posterior teeth. When a posterior tooth is extracted, the floor of the sinus drops down into the empty space. When drilling a hole in the bone preparing it for the placement of a dental implant perforates a low sinus, then depending on the situation, the area can be left alone and the perforation will heal on it's own. Sometimes infection develops or there are other reasons why the perforation does not heal.

The knife like pain in your face could indicate a nerve irritation... may or may not be a permanent problem. Your dentist should know that you are experiencing this type of pain and evaluate the area more thoroughly.

It is best to consult with your dentist about this pain and if necessary see an oral surgeon for another evaluation.

Bryanna