Tooth and Mouth Problems

I have a black spot on front teeth and I am not sure if its is a cavity or not so what are the possible options to treat that. Also I have tartar on some other tooth so can you suggest some home remedy to solve it. Request you to suggest home treatments for both the problems

I had been undergoing braces treatment for past 2 years. My original requirement was to only close gaps between my teeth I had a canine in upper palatte and that needed to be exposed. It took 2 years to bring it down but is rotated. The doctor is suggesting to leave it as is and build up than bring it in position. Please advise how much time will it take if I want to correct original tooth. Also are their chances of tooth becoming dead. What to do if there is not enough space to rotate?

I have severe lower jaw pain under ear, side of the neck and lower jaw since may. I have mild swelling in the lower jaw and side of the neck. I have some small lump spots in the side of the neck and under earlobe which hurts to touch. I have ear pain and fullness. went to ENT and no ear infection. went to dentist, he told me to extract upper wisdom tooth. extracted in July. still the same symptoms. went back and he said I might have a tooth crack in the lower first molar or it could be tmjd.both crack and tmjd will have the same symptoms ,so he said we have to rule out one by one. I didn't feel any pain on lower molar. but during diagnosis, that tooth was very sensitive to cold and to bite on one spot on that tooth. i did RCT yesterday. I still have same pain under earlobe and the side of the neck. so RCT doesn't help with jaw pain. rct helps with sore pain on the lower molar but not the jaw or neck pain. I have severe burning pain. when to get crown after RCT?  told me to get it 6wks.

My front teeth are too big and have gaps in it and one of the teeth is not properly aligned please help me suggesting the cost and the time it will take to make a happy smile on my face

My one year old baby has white stains on his upper teeth below gumline. I have also not started tooth paste yet for him although a fellow parent has asked to start with a fluoride free toothpaste. Now I am concerned that this may be decay and he needs a fluoride toothpaste. What should I do?

I had hole in a tooth for 4 years than i got it composite filling (that tooth with a hole was not paining Or was sensitive). But i have done filling 1 years ago till now my tooth is sensitive to more  cold. There's no pain but when by mistake I bite some hard food with that tooth I can feel pain will come. Will I require RCT?

If I brush slightly faster then 2,3 drops of blood will come from gums so plz suggest some tips for strengthening

I don't want any treatments for reeth whitening.. But recommend some tips for teeth whitening with home remedies

Regularly I am using colgate,but I dont see any whiteness in my teeth and I want to make my teeth stronger plz suggest some tips

SEVERE BUCCAL CANDIDIASIS WITH ULCER IN LEFT BUCCAL MUCOSA ...IAM A DIABETIC AND MY FBS IS AROUND 120-130