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Posted On February 22, 2026

How Do I Know If I Need a Root Canal vs. a Simple Filling?

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When it comes to dental procedures, understanding the difference between a root canal and a simple filling is essential to making the right decision for your oral health. While both procedures are designed to treat cavities and infection, they address different levels of damage to your teeth. As an experienced dentist near me in Woodland Hills, CA, I’ll help you understand when each treatment is necessary, so you can make an informed decision about your dental care.

What Is a Simple Filling?

A filling is typically used to treat cavities that affect the outer layers of the tooth, usually the enamel and dentin. When a cavity forms due to decay, the dentist will clean out the decayed part of the tooth and fill the space with a material like composite resin, amalgam, or porcelain. Fillings are often enough when the decay hasn’t reached the inner part of the tooth (the pulp) and are typically quick, relatively pain-free procedures.

Signs That You Need a Filling

If you experience tooth sensitivity, discomfort when chewing, or slight pain in a specific tooth, you might have a cavity that needs filling. Your dentist will take X-rays and examine your teeth to determine the extent of the damage. If only the enamel or dentin is affected, a filling should do the job and restore your tooth to its normal function.

What Is a Root Canal?

A root canal is a more intensive procedure that is needed when the tooth decay has reached the innermost layer of the tooth, the pulp. The pulp contains nerves and blood vessels, and when it becomes infected or damaged, it can cause severe pain, swelling, and even an abscess. A root canal removes the infected pulp, cleans out the inside of the tooth, and fills the space with a special material. Afterward, the tooth is typically covered with a crown to restore its strength and function.

Signs That You Need a Root Canal

Unlike a simple cavity, a root canal is necessary when decay reaches the tooth pulp. Symptoms that indicate the need for a root canal may include severe tooth pain, particularly when chewing or applying pressure, prolonged tooth sensitivity to hot or cold, or swelling in the gums near the affected tooth. If you experience any of these signs, it’s essential to visit your dentist in Los Angeles right away to prevent further complications, such as an abscess or the loss of the tooth.

How to Differentiate Between the Two Procedures

The primary difference between a filling and a root canal is the extent of the damage to the tooth. If the decay is superficial and confined to the enamel and dentin, a filling will likely be sufficient. However, if the decay has infected the tooth pulp, a root canal is necessary to save the tooth. Your dentist will use X-rays and clinical exams to determine the best course of action based on the severity of the damage.

Tooth Pain and Sensitivity

If you experience mild pain or sensitivity, it’s possible that a filling will be enough to treat the problem. However, if the pain is sharp, persistent, or occurs with chewing, you may need a root canal. Root canal pain is often described as intense and throbbing, whereas the pain from a filling is typically more localized and can be addressed with over-the-counter pain relief.

Why You Shouldn’t Ignore the Symptoms

Whether you need a root canal or a simple filling, it’s important to address dental issues early. Delaying treatment can lead to more severe complications, such as infections, abscesses, or even tooth loss. If left untreated, an infection in the tooth pulp can spread to other parts of your mouth or even to other areas of your body, leading to more serious health problems. Regular dental checkups with your Woodland Hills dentist can help catch issues before they become urgent, saving you time, money, and unnecessary pain.

Frequently Asked Questions

How can I tell if I need a root canal or a filling?

The main factor in determining whether you need a root canal or a filling is the severity of the decay. If the decay is only in the outer layers of the tooth, a filling may be sufficient. However, if the infection has reached the pulp of the tooth, a root canal is necessary. Symptoms such as severe pain, prolonged sensitivity, or swelling are common signs that a root canal may be needed.

Can I delay a root canal procedure?

It’s important not to delay a root canal if your dentist recommends it. Ignoring the problem can lead to further damage to the tooth and surrounding tissues, which may ultimately result in tooth loss or a more complicated treatment plan. It’s best to address the issue as soon as possible to prevent further complications.

Will a root canal hurt?

Root canals are typically performed under local anesthesia, so you won’t feel any pain during the procedure. Afterward, some discomfort or swelling is common, but this can usually be managed with over-the-counter pain relievers. The relief from the intense pain caused by the infected pulp usually outweighs any post-procedure discomfort.

Don’t Wait—Get the Right Treatment for Your Tooth

If you’re experiencing tooth pain or discomfort, it’s important to seek treatment from a skilled dentist in Los Angeles who can help determine whether you need a root canal or a simple filling. Early intervention can save your tooth, prevent further complications, and ensure that your smile stays healthy for years to come. Contact our office today to schedule a consultation!

Dr. Ahdout

22116 Ventura Blvd, Woodland Hills, CA 91364, United States

Phone: +1 (818) 340-3062

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