Tooth and Mouth Problems

The teeth I have an amalgam has very deep cavity, need to replace an amalgam feeling, so how painful it will be to replace an amalgam ? And is the process of removing/replacing amalgam is mercury free ? To be very frank I am very scared, while in the process of removing amalgam can I have anesthesia ?

I have pain in tooth and it is very painful and its more from three days and i have headache also because of that

One of my front teeth is having outward projection ... I want to have temporary braces as i was using that earlier

I had root canal done almost 10 years ago. developed a swelling 5 years later on the gum. dentist performed peri apical surgery 1 year after the swelling developed but couldn't access the infection or clear it and just closed it. i still have the swelling. no pain. every now and then it flares up little bit with mild irritation. what should be my next steps to get rid of this problem?

Left side jaw pain when open the mouth not able to open the mouth fully. Only able to enter 1 finger in the mouth.

Sir/madam i am planning to get a root canal treatment done for my fractured 2nd-molar where i have lost more than half my second molar. and now doctor have suggested me to get POST support before capping for durability. i want to know how much will this post cost. and is there any issue if i go with a fibre or metallic post. and what will be their respective prices. and what are the options available in posts which is the better one ?

Sir/ Madam, From the last few years I took Tobacco due to whick now I have tobacco strains in my teeth bur now I want to clean my teeth to my original whitening and shine.

While i sleeping during night and i morning i wake up but my mouth is full of saliva and its thik  that I can't swallow.what is the reason ?and what precautions did i take to reduce this problem, I went to dentist they cleaned my teeth but still I don't find resolution

From past 1week I had severe pain on my left side of the jaw.i had headache as well as throat pain,when I went to doctor he initially said gum problems and did scaling,gav mouth wash.But later I had severe pain,when I went to him again ,he said pericoronitis and extracted my third lower molar,but I had a crown next to it.its been 4days since extraction but I have severe pain and a bit of swelling on my left side.i really want to know what is the exact cause.

I chewed tobacco from last 7 years.i had white patches in mouth i got irritated mouth when i eat spicy food. Now i quit tobbaco totaly. I wanted to know that this patches will go on their own or requires medication.