Cracked Tooth Syndrome: Why That Sharp Bite Pain Keeps Coming Back

Not every dental problem shows up as constant pain. Cracked tooth syndrome is famous for being intermittent, confusing, and easy to dismiss — until it isn't.

What cracked tooth syndrome is

It's a hairline fracture in a tooth, usually a back molar, that flexes when you bite. The crack is often too small to see on an x-ray, but every time it opens and closes it irritates the nerve inside the tooth. That's why the pain comes and goes.

Classic symptoms

• Sharp pain when biting on something, especially when you release the bite
• Sensitivity to cold or sweets that lingers
• Pain that moves around and is hard to pinpoint
• No obvious cavity on the tooth

Who tends to get it

• People who grind or clench their teeth
• Teeth with large old fillings that have weakened the surrounding structure
• Anyone who's bitten down on something hard — ice, popcorn kernels, an olive pit

How we diagnose it

We use a combination of bite tests (tapping on individual cusps), transillumination with a bright light, magnification, and sometimes dye to make the crack visible. Because standard x-rays often miss these cracks, careful clinical testing is what usually finds them.

Treatment depends on how deep the crack runs

• Shallow crack in enamel: often just monitored, sometimes bonded.
• Crack into dentin: typically restored with a crown to hold the tooth together. A same-day CEREC crown can often finish this in one visit.
• Crack reaching the pulp: root canal therapy plus a crown.
• Crack extending below the gumline or splitting the root: the tooth usually can't be saved and is replaced, often with a dental implant.

Why speed matters

Cracks propagate. A tooth that could be saved with a crown this month may need extraction six months from now. If biting hurts in a specific spot, call 604-535-8835 — catching it early usually keeps the treatment simple.