If left untreated, a cavity can grow deeper through the enamel and dentin until it reaches the pulp, the soft tissue at the center of the tooth that contains nerves and blood vessels.
At that point, a filling is no longer enough. A root canal can often save the tooth instead of requiring extraction. Most deep cavities can be treated this way as long as enough healthy tooth structure remains to support the tooth afterward. A root canal is less likely to work if the tooth is cracked below the gumline or if the surrounding bone has broken down too far to hold it in place.
Signs a Deep Cavity May Need a Root Canal
Deep decay does not always show symptoms right away, but certain signs often appear once the pulp is affected. Recognizing them early can make the difference between saving a tooth and losing it.
Persistent Toothache
If your pain lingers instead of fading on its own, it often means decay has reached the nerve. Unlike a brief sting after eating something sweet, this type of toothache can linger throughout the day and may become worse at night. A pain like this is worth having evaluated as soon as possible.
Lingering Sensitivity to Hot or Cold
It is normal to feel some sensitivity to hot or cold food and drinks. It becomes a concern when that sensitivity lasts well after you finish eating or drinking, sometimes for a minute or longer, since this usually points to nerve involvement inside the tooth.
Pain When Biting or Chewing
A tooth that hurts specifically under pressure, while biting down or chewing, often has inflammation extending into the root. This kind of localized pain is often one of the signs that decay has moved beyond the surface.
Swollen or Tender Gums
Gum tissue near an infected tooth can become swollen, tender to the touch, or noticeably sore. This swelling happens because your body is responding to the infection at the root, not a problem with the gum itself.
The area near the affected tooth may also feel warm or look a bit redder than the gum beside it. Swelling that stays for more than a day or two usually means the infection has become established and should be evaluated.
Tooth Discoloration
A tooth’s color can change when the nerve inside the tooth is no longer alive. It often shifts toward gray or yellow compared to the surrounding teeth. This shift happens gradually, and it is not just a cosmetic change; it often points to a problem underneath.
Teeth generally do not change color without an underlying cause, so when a tooth looks noticeably different from the others, nerve damage or infection at the root is a common reason.
A Pimple-Like Bump on the Gums
A small bump near the base of a tooth, sometimes called a gum boil, is one of the clearest signs of an abscess. Pus from the infected root collects beneath the gum until it finally breaks through the surface.
The bump may drain on its own, sometimes leaving a bad taste in your mouth, then fill back up again. Its presence usually means there is an infection at the root that needs treatment.
What to Expect During Root Canal Treatment
Your dentist starts by fully numbing the area. From there, the infected or damaged pulp is removed from inside the tooth, and the canal is cleaned, shaped, and disinfected before being sealed with a biocompatible material. A crown often follows, giving the tooth back its strength for everyday biting and chewing.
Most patients find the procedure manageable, since the area is completely numb before any work begins.
Protect Your Natural Tooth
A root canal can often save a tooth that would otherwise need extraction, and keeping the natural tooth in place helps the surrounding teeth and jaw stay properly supported. It also spares you the extra steps involved in replacing a missing tooth down the road.
The earlier a deep cavity gets treated, the better the tooth’s chances. When a tooth cannot be saved, your dentist will go over replacement options with you, such as an implant or bridge. Call Bayside Dental Group and Orthodontics at (979) 330-4113 to schedule your consultation.