Root canal therapy is a specialized endodontic procedure that treats infection and damage deep within a tooth’s structure. When decay or trauma affects the pulp and nerves of a posterior tooth — such as a molar or premolar — root canal therapy is often necessary to preserve the tooth and restore oral health. Because posterior teeth endure significant biting forces, their treatment requires precision, skill and highly durable restorations to ensure the long-term success of this treatment.

Why Posterior Root Canal Therapy Is Necessary

When bacteria penetrate deep into a tooth due to extensive decay, cracks or trauma, the pulp becomes inflamed or infected. If left untreated, this infection can spread to the surrounding bone and tissues, leading to abscess formation, severe pain and even tooth loss. Root canal therapy removes the damaged pulp, disinfects the internal canals and fills the space with a biocompatible material to prevent reinfection. This process allows the natural tooth to remain in place while eliminating discomfort.

What to Expect During Treatment

During root canal therapy for a posterior tooth, the affected area is numbed to ensure comfort. Dr. Pouya Zafarnia then creates a small opening in the tooth to access the pulp chamber and carefully removes the infected tissue. The canals are then cleaned, shaped and filled with a specialized material to seal them and prevent bacteria from re-entering. Due to the structural demands of molars and premolars, a custom dental crown is typically placed to reinforce the tooth’s strength and functionality.

Comfort & Long-Term Results

Modern root canal therapy is designed to be as comfortable as possible. Many patients report that the procedure feels similar to receiving a routine dental filling. Advances in techniques, anesthetics and technology allow for efficient treatment with minimal discomfort. Once the tooth is fully restored, it can function normally for years, reducing the risk of extraction and preserving the natural alignment of the bite.

If you are experiencing persistent tooth pain, sensitivity or swelling, it is important to seek prompt evaluation. Our skilled dentist and team are dedicated to providing gentle and effective posterior root canal therapy in Orange, California, to help you maintain a healthy, pain-free smile. Reach out to Z Dental Lounge at 714-426-9155 today to schedule your personal consultation and learn more.

Frequently Asked Questions About Root Canal Therapy

Is root canal therapy painful?

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Root canal therapy has a reputation for being painful, but modern techniques and local anesthesia make the procedure much more comfortable than expected. Most patients compare it to getting a routine filling. The purpose of root canal therapy is to relieve pain caused by infection, not create additional discomfort.

How long does root canal therapy take?

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The procedure typically takes one to two hours, depending on the complexity of the case. Root canal therapy can often be completed in a single visit, but some may require a follow-up appointment. If a dental crown is needed, an additional visit may be required to place the final restoration.

What happens if I delay root canal therapy?

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Delaying treatment can allow the infection to spread, potentially leading to severe pain, abscess formation or bone loss in the jaw. In some cases, the tooth may become unsalvageable, requiring extraction. Seeking prompt treatment can prevent further complications and help preserve your natural tooth for years to come.

Will my tooth be weaker after root canal therapy?

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A tooth that has undergone root canal therapy may become more fragile over time, but a dental crown helps reinforce its structure and restore function. With proper care, a treated tooth can last a lifetime. Regular dental visits and good oral hygiene are essential for maintaining long-term strength and health.

What areas do you serve?

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Dr. Zafarnia provides root canal therapy in Orange, California, and to patients in the neighboring areas, including Anaheim, Garden Grove, Santa Ana and Tustin, California. Reach out today to schedule a consultation and learn more.