Patient Education

Tooth Decay & Cavities

How cavities form, the warning signs, and how we treat them before they become bigger problems.

What Causes Tooth Decay?

Tooth decay happens when plaque — a sticky film of bacteria — builds up on your teeth and produces acids that wear away enamel over time. Left untreated, this can create a cavity, a small hole in the tooth that gradually grows deeper. Sugary and starchy foods, infrequent brushing, and skipping regular cleanings all make decay more likely. Because early decay often doesn't hurt, it's usually caught during a routine checkup rather than because of a symptom you'd notice at home.

Signs to Watch For

Early cavities frequently show no symptoms at all, which is part of why we check for them at every cleaning. As decay progresses, you may notice sensitivity to sweets or temperature, a visible dark spot or pit on the tooth, or mild discomfort when chewing. Pain that's sharp, constant, or wakes you up at night usually means decay has reached deeper into the tooth and needs prompt attention rather than waiting for your next scheduled visit.

How We Treat It

Treatment depends on how far decay has progressed. Early cavities are typically treated with a simple, tooth-colored filling in a single visit. Left longer, decay that reaches the inner pulp of the tooth may require a root canal to save it. We always aim to treat conservatively and preserve as much of your natural tooth structure as possible — catching decay early is what makes that possible.

Questions About This?

We're always happy to talk through your specific situation in more detail — call us or book a visit anytime.

MH

Dr. Hanrahan practices family and restorative dentistry at Lake Oswego Smiles, with an emphasis on thoughtful, conservative treatment.

Have a Question?

We're always happy to talk through anything you've read here in more detail.

Location

16699 Boones Ferry Road, Suite 200
Lake Oswego, OR 97035

Hours

Mon – Thu, 7am – 4pm
Fri – Sun, Closed

Contact

(503) 635-3653
office@oswegosmiles.com