Hello everyone,

I've visited this forum in the past and found very helpful answers.
This is my first post, I hope someone can enlighten me.

One of my upper left molars (sorry, no idea about teeth numbers) had a long nasty history. It was first root-canaled, badly, by a dentist about 30 years ago (I am now 47). Then it broke, root-canaled again, whole fake tooth placed over the roots... years later that came off, a dentist just stuck it back on badly. Eventually one of the roots cracked.... infection followed etc. Long story short: in May 2015 I had it extracted. I took antibiotics and my usual dentist said it will now be fine.

About 2 weeks ago I went to a specialist to start the implant procedure. I already knew the first stage would be a sinus lift and bone graft. However, when the surgeon opened it up, he said that the infection in the bone was still there, and it can't go away unless he debrides it (which he did). He did everything in one go - sinus lift/debriding/bone graft, and in the end he put some stitches on (it all took 2 hours!).

After 1 week the gum got somehow torn, and he needed to add a couple more stitches. All along, since the day of the procedure, the surgical site smells very bad. I took Augmentin for the first week, now I'm on Metronidazol (3rd day now). I was told to brush teeth, but nowhere near the site, and rinse only with Chlorhexil.

My questions are, a) I still feel some threads hanging... is it possible I need yet more stitches?, and b) are there any chances of success for this bone graft? As, from what I read on this forum, it's bound to fail (due to bad history, and debriding/graft done at the same time).

Many thanks in advance to anyone who took the trouble to read this and to anyone who replies.