What Are Dental Fillings? Everything You Need to Know About Restorative Care in Franklin, WI

April 15, 2026

If your dentist has ever told you that you have a cavity, you've probably heard the word "filling" come up pretty quickly after. And while most of us know that fillings fix cavities, there's actually a lot more to them than you might think. Whether you're curious about what the procedure actually involves, what materials are used, or how to avoid needing one in the future — we've got you covered.

At The Opal Dental Co. in Franklin, WI, we believe that informed patients are empowered patients. So let's break it all down.

What Is a Dental Filling?

A dental filling is exactly what it sounds like — a material used to "fill in" a cavity (also called tooth decay) after the damaged portion of the tooth has been removed. Once placed, the filling restores the tooth's shape and function, prevents further decay, and protects the inner layers of the tooth from bacteria.

Fillings aren't just for cavities, though. They can also be used to repair cracked or chipped teeth, or to replace old, worn-down fillings that are no longer doing their job.

What Causes Cavities?

Cavities form when bacteria in your mouth feed on sugars and produce acid that gradually erodes your tooth enamel. Over time, this creates a small hole — a cavity — that needs to be addressed before it grows larger and causes more serious problems like infection or tooth loss.

Some people are more cavity-prone than others due to genetics, diet, dry mouth, or the structure of their teeth. But the good news is that with regular cleanings and checkups at The Opal Dental Co., we can catch cavities early — before they become a bigger deal.

What Types of Fillings Are Available?

Not all fillings are created equal. Here's a look at the most common types and when each might be recommended:

Composite (tooth-colored) fillings are the most popular option today, and for good reason. Made from a blend of resin and glass, composite fillings are designed to match the natural color of your teeth — so they blend right in. They bond directly to the tooth structure, which means less removal of healthy tooth material during placement. These are great for visible teeth and for patients who prefer a more natural look.

Amalgam (silver) fillings have been used in dentistry for over 150 years. They're incredibly durable and tend to be a more cost-effective option, which makes them a practical choice for back teeth that take a lot of chewing pressure. They are silver in color, so they're more noticeable than composite fillings.

Ceramic fillings (also called inlays or onlays) are made from porcelain and offer excellent durability and aesthetics. They're a great option for larger cavities in visible areas.

At The Opal Dental Co., we'll always talk through your options and help you choose the filling material that makes the most sense for your tooth, your budget, and your smile goals.

What Does Getting a Filling Actually Feel Like?

We know this is the part most people are really wondering about! The honest answer: getting a filling is one of the most routine procedures in dentistry, and with modern techniques and a gentle touch, it's very manageable.

Here's what you can typically expect:

Step 1 — Numbing the area. Before anything else, we'll apply a local anesthetic to numb the tooth and surrounding gum tissue. You may feel a brief pinch from the injection, but once the numbing kicks in, you shouldn't feel any pain — just some pressure and movement.

Step 2 — Removing the decay. Using a small drill or laser, Dr. Del Carpio carefully removes the decayed portion of the tooth. This is what the numbing is for — you'll feel the sensation, but not the discomfort.

Step 3 — Cleaning and preparing the tooth. The area is cleaned and shaped so the filling material will adhere properly.

Step 4 — Placing the filling. The filling material is applied in layers (for composite fillings), hardened with a special curing light, and then shaped and polished to match your bite and feel natural.

The whole process usually takes between 30 and 60 minutes depending on the size and location of the cavity. Most patients go about their normal day immediately afterward — you'll just want to avoid eating until the numbness wears off!

Will I Need to Do Anything Differently After Getting a Filling?

For the most part, fillings don't require any special aftercare. You might notice some mild sensitivity to hot, cold, or pressure for a few days after the procedure — this is totally normal and typically fades on its own.

A few things to keep in mind after your filling:

  • Avoid very hard or sticky foods for the first 24 hours
  • Continue brushing and flossing as usual
  • Let us know if your bite feels off — we can easily adjust the filling at a follow-up visit
  • Sensitivity that lasts more than a week or two is worth a call to our office

How Long Do Fillings Last?

With proper care, most fillings last many years. Composite fillings typically last 7 to 10 years, while amalgam fillings can last 10 to 15 years or longer. Regular checkups at The Opal Dental Co. allow us to monitor your fillings over time and catch any wear or cracks before they become a problem.

The Best Filling Is One You Never Need

We always say: the best way to deal with a cavity is to prevent it in the first place! Brushing twice a day, flossing daily, eating a balanced diet, and visiting us for regular cleanings and exams are your best defenses against tooth decay.

But if you do need a filling — whether you're coming in from Franklin, Oak Creek, or anywhere in the Milwaukee area — you can count on The Opal Dental Co. to make the experience as comfortable and stress-free as possible. That's our promise.

Ready to get your smile checked out? Book an appointment online or give us a call at (414) 425-0500. We'd love to see you!

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