This is probably the most fear-inducing question in dentistry, and I completely understand the anxiety. I’m Dr. Emily Nguyen, Principal Dentist at Picasso Dental Clinic, and I need to give you an honest answer that addresses both the misconception and the reality of modern root canal treatment.
Why Root Canals Have a Terrible Reputation
The bad reputation comes from outdated experiences and confusion about cause and effect. Decades ago, anesthesia techniques were less effective, dental instruments were cruder, and procedures took longer. Patients genuinely suffered during root canal treatment in the past, and those stories persist in collective memory.
The bigger misconception involves timing. People remember the severe toothache that brought them to the dentist, not distinguishing between the pain before treatment and the procedure itself. The tooth infection causes excruciating pain. The root canal eliminates that pain. But in people’s minds, root canals and pain become linked.
At our Hanoi clinic, I hear patients say “I need a root canal” with the same dread they’d say “I need surgery.” The reality is that having a root canal is similar to getting a filling, just longer and requiring more precision. The tooth is completely numb throughout.
Popular culture reinforces the fear. Comedians joke about root canals as the ultimate torture. Movies use them as metaphors for terrible experiences. This cultural messaging creates anxiety that doesn’t match modern dental reality.
Modern Anesthesia Changes Everything
Local anesthesia has improved dramatically over the past few decades. I use techniques that ensure complete numbness before beginning any root canal procedure. If you feel anything beyond pressure, I add more anesthetic until you’re completely comfortable.
The numbing injection itself causes brief discomfort, similar to any injection. I use topical anesthetic gel first to minimize even that sensation. Most patients describe the injection as a pinch or sting that lasts seconds. Once the area is numb, you won’t feel pain during the procedure.
For patients with severe anxiety, we offer sedation options at Picasso Dental Clinic locations across Vietnam. Oral sedation creates relaxation while you remain conscious. This helps anxious patients get through treatment comfortably.
Some teeth are harder to numb than others. Lower back teeth sometimes resist standard anesthetic techniques because of nerve anatomy. If this happens, I have supplemental techniques that provide the additional numbness needed. I never proceed if you’re experiencing pain.
Infected teeth can be challenging to anesthetize because infection changes tissue pH, making anesthetic less effective. In severe cases, I prescribe antibiotics first to reduce infection, then perform the root canal once the tooth numbs properly.
What You Actually Feel During Treatment
Once numb, you’ll feel pressure as I work on your tooth. You might feel vibration from instruments. You’ll hear sounds from dental equipment. These sensations are normal and don’t indicate pain or damage. Many patients fall asleep during root canals because there’s no discomfort, just monotonous sensations and sounds.
I check throughout the procedure to ensure you’re comfortable. If you feel any sharp sensation or pain, raise your hand immediately and I’ll add more anesthetic. Don’t try to tough it out; there’s no reason to experience pain during modern dentistry.
The procedure takes one to two hours typically, depending on tooth complexity. Front teeth with single roots are quicker; back teeth with multiple root canals take longer. At our Ho Chi Minh City location, I explain the timeline beforehand so patients know what to expect.
Your jaw might feel tired from staying open, but this is muscle fatigue, not tooth pain. We take breaks if needed. Some patients use bite blocks to rest their jaw muscles during longer procedures.
After the Procedure: Normal vs. Concerning Pain
Once anesthesia wears off, usually two to four hours after treatment, you’ll likely feel some soreness. This is normal healing discomfort, not severe pain. The tooth and surrounding gum tissue were manipulated during treatment, and mild inflammation results.
This post-treatment soreness typically peaks 24 to 48 hours after the procedure, then improves steadily. Most patients manage it fine with ibuprofen or acetaminophen. You should be able to work, sleep, and function normally, just with awareness of mild discomfort in that area.
Chewing on the treated tooth might feel sensitive for several days to a week. This happens because ligaments around the tooth root were irritated during cleaning and shaping. Avoid chewing hard foods on that side temporarily.
Severe, throbbing pain after root canal treatment is not normal and indicates a problem requiring attention. Possible causes include missed canal anatomy, incomplete cleaning, or developing infection. Contact your dentist immediately if pain is worsening rather than improving after a few days.
At our Da Nang and Da Lat clinics, I provide patients with detailed post-operative instructions and my contact information for any concerns. Most people experience no significant issues, but knowing when to call gives peace of mind.
Comparing Root Canal Pain to the Alternative
Here’s perspective that helps patients: the pain from an infected tooth requiring root canal treatment far exceeds any discomfort from the treatment itself. That infected tooth throbs constantly, keeps you awake at night, and makes eating impossible. The root canal stops that pain.
The alternative to root canal treatment is tooth extraction. While extraction is quicker, it leaves you missing a tooth that then requires replacement with an implant, bridge, or partial denture. These solutions are more expensive and time-consuming than root canal treatment.
Since 2013, I’ve treated patients from 65 nationalities at Picasso Dental Clinic, and the universal response after root canal treatment is relief. The feared procedure turns out far better than expected, and the tooth pain that dominated their life disappears.
If you’re facing root canal treatment and feeling anxious about pain, I’m happy to discuss the procedure in detail and address your specific concerns at any of our locations in Hanoi, Da Nang, Ho Chi Minh City, or Da Lat.


