You may want to ask the periodontist but if its flap surgery, it may result in some gum recession in the area but the bone graft may help negate that. Otherwise, it shouldn't loosen the teeth in theory but I can't guarantee it. They probably will warn you that it may be initially loose before it tightens up after treatment. Obviously without treatment, it will loosen over time and progressively get worse.
Dr Tsang: Thanks for responding. I have seen 4 periodontists and they all agree I need flap surgery. My number one question is this, will this cause my teeth tp become loose for a while. Or is this a fallacy?? Right now they are tight. I am worried I will not be able to eat at all. I do not want to lose more teeth. The periodontist I have chosen is also putting bone in.
If you're not completely comfortable with the recommended treatment, I suggest either discussing your concerns with the original dentist or seeking a second opinion. Obviously I can't provide much of an opinion as I'm not able to evaluate you but you shouldn't do any treatment you're not comfortable with at this time. But I wouldn't recommend waiting too long to get the treatment if it is deemed necessary