Jason Kung DDS, MS — UCLA & OHSU-trained Specialist Endodontist serving Sunnyvale, Cupertino, and the South Bay. Carl Zeiss surgical microscope, CBCT 3D imaging, and same-day emergency appointments — seven days a week.
Tooth pain today? We help patients get comfortable fast — often the same day. Most modern root canals feel similar to getting a filling.
Trusted by South Bay general dentists
10+
Years as Endodontist
20k+
Teeth Saved
Endodontic Specialist
Highest standard of endodontic specialization.
Why patients choose us
Your root canal is performed by a Specialist Endodontist — not a general dental office.
We work under a Zeiss surgical microscope to see tiny details inside the tooth.
CBCT imaging helps us diagnose difficult pain and complex root anatomy.
Same-day emergency slots are held every day, including weekends.
Our goal is to help you keep your natural tooth whenever possible.
Patient Education
A short video from the American Association of Endodontists on why a specialist endodontist is the right person to save your tooth.
Endodontists complete years of additional specialized training focused exclusively on diagnosing tooth pain and performing root canal treatments.
Every case is treated under a Zeiss OPMI surgical microscope with magnification up to 25×, paired with low-dose 3D CBCT imaging for precise diagnosis general dentists cannot match.
Our expertise in profound anesthesia techniques means your treatment will be comfortable and virtually pain-free. We specialize in creating a calm, reassuring experience — even for the most anxious patients.
We hold emergency slots every day including weekends. Severe pain, swelling, or trauma — call (669) 234-2354 and we will do our best to see you within hours.
By the numbers
Over 95%
Reported success rate for endodontic treatment in published clinical literature.
Source: American Association of Endodontists (aae.org)
15M+
Root canals performed each year in the United States — saving natural teeth.
Source: American Association of Endodontists (aae.org)
2–3 yrs
Of additional residency training endodontists complete beyond dental school.
Source: American Association of Endodontists (aae.org)
Quick Request
Fill in a few details and our team will call you back to confirm a time that works for you — usually within the hour.
Patient Reviews
"I was terrified of getting a root canal but Dr. Kung made the entire experience surprisingly calm and pain-free. The level of care and precision here is unlike anything I've experienced at a regular dentist. Highly recommend."
Michelle T.
Google Review · March 2025
"Came in with severe tooth pain and left completely comfortable. The staff is warm and professional, the technology is impressive, and Dr. Kung took the time to explain everything clearly. This is a truly exceptional practice."
David L.
Yelp Review · January 2025
"I had a complicated retreatment that another office said couldn't be done. Dr. Kung saved my tooth. His attention to detail under the microscope is extraordinary. Worth every penny for this level of specialty care."
Priya S.
Google Review · February 2025
Recognition
Dr. Jason Kung was selected by the National Consumer Advisory Board for inclusion in the 2024 list of America’s Best Dentists, based on evidence of superior training, experience, continuing education, and commitment to patient care.
The plaque hangs in our Sunnyvale lobby. Stop by — we’d be happy to show you around.
Patient Education
This 3D animated video from the American Association of Endodontists walks you through the procedure step by step — from diagnosis to the final seal. Most patients are surprised by how straightforward it is.
Modern root canal treatment under the operating microscope takes about 60–90 minutes and is no more uncomfortable than a filling.
Video produced by the American Association of Endodontists
Latest from our newsroom
A root canal can last a lifetime — but the outcome depends on several factors. Here's what the research shows and how to give your tooth the best chance.
Read articleYour dentist referred you to an endodontist — but what does that actually mean? Here's a plain-English explanation of why specialists exist and what they can do for your tooth.
Read articleIf you've just been told you have external cervical resorption, the first question is usually 'can my tooth be saved?' The honest answer is that it depends on how early it's caught and how it's treated — and a 2022 study that followed teeth for up to 10 years shows exactly which factors matter most.
Read articleVisit Us
Just off Hollenbeck Avenue, with free on-site parking and easy access from I-280, CA-85, US-101, and Lawrence Expressway. We serve patients from across the South Bay including Cupertino, Mountain View, Santa Clara, San Jose, Los Altos, and Palo Alto.
