Restorative
Root canal therapy in Billerica
A root canal has a bad reputation it hasn’t deserved for decades. It’s the treatment that stops the pain and keeps your own tooth in your mouth.
Why a tooth needs one
Inside every tooth is a chamber of soft tissue — the pulp — holding the nerve and blood supply. When decay reaches it, or a crack lets bacteria in, or a hard knock damages it, that tissue becomes infected. It cannot heal on its own, and the infection has nowhere to drain, which is why the pain can be so severe.
A root canal removes the infected tissue, disinfects and seals the space, and leaves the tooth in place. The alternative is extraction — and replacing a tooth is always more work and more money than keeping it.
Signs you may need one
Pain that lingers
Especially pain that wakes you up, or that keeps aching long after something hot or cold has gone.
Sensitivity to heat
Cold sensitivity is common and often harmless. Pain from something hot is more concerning.
A darkening tooth
A single tooth going gray or brown often means the pulp inside has died, sometimes years after an injury.
A pimple on the gum
A small bump near the root that comes and goes is an abscess draining. It means infection, even if it doesn’t hurt.
Swelling or tenderness
Puffiness in the gum around one tooth, or pain when you bite down on it.
No symptoms at all
Some infections are silent and show up only on an x-ray. That’s one of the reasons routine checkups matter.
What the appointment is like
With modern anesthetic, the treatment itself feels much like having a filling done. The relief is immediate.
1
Numbing
The tooth and the area around it are thoroughly numbed before anything starts. If you feel anything, we stop and add more.
2
Cleaning out the canal
A small opening is made in the top of the tooth, the infected pulp is removed, and the canals are cleaned and shaped.
3
Sealing
The space is filled with a biocompatible material and sealed so bacteria can’t get back in.
4
Protecting the tooth
A treated tooth is more brittle, so a back tooth almost always needs a crown afterward to keep it from fracturing.
Common questions
Is a root canal painful?
The procedure is done under local anesthetic and most patients say it felt like a filling. The pain people associate with root canals is the infection beforehand — which is what the treatment removes.
How long does it take?
Usually one to two hours. Some teeth, particularly molars with several canals, are done over two visits.
Could I just pull the tooth instead?
You can, and sometimes that's the right call. But an extraction leaves a gap that needs an implant or a bridge to fill properly, which costs more than the root canal and crown would have. Keeping your own tooth is almost always the better outcome.
Will I need a crown afterward?
For back teeth, nearly always — they take the force of chewing and a treated tooth is more prone to cracking. Some front teeth can be restored with a filling instead.
Related treatments
Emergency dentistry
Same-day whenever we can, for pain, breaks, and swelling.
Dental crowns & bridges
Protecting a tooth with too little structure left.
Tooth extractions
When a tooth genuinely can’t be saved.
Have a question about root canal treatment?
Call and we’ll talk it through — no appointment needed to ask.