If it's sitting there in your mouth, then get it taken out because that can cause infection, bad breath, etc. Not to mention if it starts to noticeably rot, you're going to have a rotten tooth in you're mouth and that's pretty much disgusting.
It is a tooth that the root has been damaged and is "dead"
Yes, a dead tooth can cause or trigger a headache.
no it can not
Bury it
The oral surgeon or dentist will let you know if antibiotics are required.
Put it under your pillow and the tooth fairy will come for it
No, whitening strips cannot cure a dead tooth. A dead tooth, which is typically non-vital due to nerve damage or decay, requires professional dental treatment such as a root canal or extraction. Whitening strips only address surface stains and do not affect the underlying causes of tooth discoloration. For a dead tooth, it's essential to consult a dentist for appropriate care.
if the crown is tight, be sure to keep the exposed tooth clean by daily brushing and flossing. its probably the root you are seeing and not the top of the tooth as it is reduced to a "peg" during crown preparation. Absolutely not, the whole idea of a crown is to make it look like a new tooth. It should look natural and nothing should show between the crown and the gum. The tooth that was prepared for crowing oviously had problems. Discoloration is common for teeth, especially around areas of decay. What your seeing is probally root structure. A common problem with crowning a tooth is the lab technician makes a crown that is too "bulky" at the tissue area, this in return causes "blanching" of the tissue. When blanching occurs the blood supply is blocked to the tissue area around the tooth, which will cause the tissue to die and recede away from that area. you can probally see the crown where it meets the tooth and think it is not covered but the area that was ground down is covered. If the area is in the front of the mouth you might want to refer to your doctor about a new or different approach.
The root of the tooth.
Immediately After Treatment: A root canal removes the pulp (nerve and blood supply), so the tooth is technically non-vital or "dead" immediately after the procedure. Residual Sensation: Some patients may feel slight sensitivity or discomfort for a few days post-treatment due to inflammation in surrounding tissues, not from the tooth itself. Healing Time: Full healing of the surrounding bone and tissue can take a few weeks to months, even though the tooth itself is already dead. No More Pain Signals: Since the nerve is removed, the tooth no longer sends pain signals; any lingering discomfort usually comes from the healing process. Crown Placement Timing: A crown is typically placed 1–2 weeks after the root canal once the area has settled, further protecting the now-dead tooth.
Dying nerves (which I assume you've experienced, given the question) have a tendency of hurting. A lot. Dead nerves have a strong tendency of getting infected, which then brings you down the root of Tooth Abscesses and root canal and general dental hell. If your tooth nerve is dead, see your dentist. (S)He should remove the nerve and then fill the space left to re-inforce your tooth. Dead teeth also go dark-coloured. :(
The tooth should be handled carefully; it should be picked up or touched by its crown (the top part of the tooth), not by its root. The tooth should be rinsed and kept moist, but not cleaned or brushed.