I would highly recommend this Dr. King's office in Sunnyvale. I had a last minute emergency and his office took me in immediately, even as a new patient. Him and his staff even stayed a bit later to make sure I got the full treatment I needed. The office has very advanced machines that I haven't seen before. Very patient and took the time go thoroughly threw the x-rays and explained to me slowly and patiently what he saw and thought was going on. Dr. Jason Kung quickly assessed my gum infection and calmed my nerves and even gave me a heads up on a potential root canal in the future but said I didn't need it now and to be mindful of certain things in the future. I appreciated his transparency, patience and outstanding hospitality.
Specialist Endodontics & Microsurgery
Microscope-guided root canals by a Specialist Endodontist.
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.
- Specialist Endodontist
- Carl Zeiss surgical microscope
- CBCT 3D imaging
- Same-day emergencies, 7 days/week
Trusted by South Bay general dentistsRead our Google reviews
Professional memberships
- American Association of Endodontists
- American Dental Association
- California Dental Association
- Santa Clara County Dental Society
10+
Years as Endodontist
20k+
Teeth Saved
Endodontic Specialist
Highest standard of endodontic specialization.
Why patients choose us
Five reasons your root canal belongs with a specialist
- 1
Specialist care
Your root canal is performed by a Specialist Endodontist — not a general dental office.
- 2
Microscope precision
We work under a Zeiss surgical microscope to see tiny details inside the tooth.
- 3
3D diagnosis
CBCT imaging helps us diagnose difficult pain and complex root anatomy.
- 4
Same-day emergencies
Same-day emergency slots are held every day, including weekends.
- 5
Tooth-saving focus
Our goal is to help you keep your natural tooth whenever possible.
Patient Education
Why saving your natural tooth matters
A short video from the American Association of Endodontists on why a specialist endodontist is the right person to save your tooth.
Why choose a specialist?
Endodontists complete years of additional specialized training focused exclusively on diagnosing tooth pain and performing root canal treatments.
Carl Zeiss surgical microscope + CBCT
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.
Pain Management
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.
Same-day emergencies, 7 days/week
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
Why patients choose a Specialist Endodontist
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
Request an appointment in seconds
Fill in a few details and our team will call you back to confirm a time that works for you — usually within the hour.
(669) 234-2354
Patient Reviews
What our patients say
Verified reviews from patients across Sunnyvale, Cupertino, Mountain View, Palo Alto, and the greater South Bay.
The office staff was great they made me feel welcomed and at eased. They answered all my questions (this was my first root canal so I had a lot). The procedure was so smoooth I was in an out with in an hour an half. They did such a great job I would highly recommend coming here if you need a root canal (no pain during or after the procedure).
Dr. Jason Kung has been a huge blessing to my quality of life, and there's no endodontist my family and I trust more. He truly listens to what outcome you want as the patient, then expertly and compassionately delivers it against all odds. His highly skilled work left me and my routine dentist in awe. As a bonus, he speaks fluent English and Mandarin. Details below: 3 other dentists had told me that replacing my teeth with implants was the only way to treat my advanced periodontal disease symptoms (pus and bleeding gums). Unlike most dentists who tried to push me to their desired outcome (very costly implants), what set Dr. Kung apart was how he truly listened to my desired outcome of saving my teeth, made that his goal, and then succeeded in doing that for a very reasonable price. Compared to other dentists, he came up with the simplest and most direct treatment plan (of microsurgery and root canal procedures), and achieved the best results.
Highly Recommend Dr.Kung-I recently needed an apicoectomy (root end surgery) after a previous root canal didn't fully resolve the issue.. From the moment I walked into their modern office, I felt completely at ease. Dr. Kung and the entire team are true experts in microscopic endodontics and advanced dental microsurgery.The procedure was virtually pain-free thanks to their state-of-the-art technology and gentle approach. They explained everything clearly, used high-powered microscopes for precision, and I experienced minimal discomfort with fast healing afterward. If you're searching for a root canal specialist, this practice delivers exceptional care with compassion and precision. The staff is friendly, the facility is spotless, and they truly prioritize patient comfort and long-term success.I've already referred several colleagues and family members. Silicon Valley Endodontics and Microsurgery is the gold standard for endodontics in the Silicon Valley area.
I had a complex apicoectomy (endodontic root-end microsurgery) performed at Silicon Valley Endodontics and Microsurgery located at Sunnyvale. Dr. Jason Kung is an outstanding specialist. He used advanced dental microscopes for precise, minimally invasive surgery after my previous root canal failed.The procedure was smooth and nearly painless, with excellent follow-up care from the friendly team. My recovery was fast and my tooth was successfully saved.If you're looking for a top-rated endodontist near me in Sunnyvale, Cupertino, Santa Clara, San Jose, Mountain View, or anywhere in Silicon Valley / South Bay, I highly recommend Dr. Kung. Perfect for apicoectomy, microsurgery, and complex root canals.Extremely grateful for their expertise in the Bay Area!
Dr Kung and team did a great job to take away my tooth pain after a painless root canal procedure which took about 30 minutes. The office is equipped with the latest high tech modern necessary equipment. If you have any anxiety don't worry because Dr Kung will take good care of you.
Recognition
Named to America’s Best Dentists 2024
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
What Happens During a Root Canal?
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
Evidence, industry updates, and patient guides from Dr. Kung
ResearchAugust 8, 2026
Who Redoes Failed Root Canals? Endodontists Do 82% of Retreatments
When a root canal fails and needs to be redone, the case almost never stays in a general practice. New national claims data shows endodontists perform 82% of all retreatments — a share that has held rock-steady for three years, across every tooth type.
Read articlePatient educationAugust 8, 2026
A Korean Speaker's Guide to Seeing a U.S. Endodontist
If English isn't your first language, scheduling a root canal in the U.S. can feel overwhelming. This guide walks Korean-speaking patients through every step—from understanding dental vocabulary to handling insurance and knowing what questions to ask.
Read articleResearchAugust 5, 2026
More Root Canals Are Going to Specialists — What New Market Data Shows
New claims data published by the American Association of Endodontists shows a quiet but steady shift: between 2023 and 2025, the share of endodontic procedures performed by specialists rose from 43% to 45%, while general practitioners' share declined. The pattern behind the numbers — complex cases increasingly routed to specialists, and CBCT imaging growing double digits every year — says a lot about how modern tooth-saving care is organized.
Read article
Visit Us
Conveniently located in Sunnyvale
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.
Silicon Valley Endodontics and Microsurgery
1565 Hollenbeck Avenue, Suite 106
Sunnyvale, CA 94087
Sunnyvale, CA 94087
Monday–Friday: 8:00 AM – 7:00 PM
Saturday–Sunday: 8:00 AM – 3:00 PM