Specialist Endodontist
Near Union City
Union City patients can reach specialist endodontic care in just 17 minutes via CA-237 — with same-day emergencies, microscope-guided root canal treatment, and evening and weekend hours to fit your schedule.
Why Union City Patients Choose Dr. Kung
From Union City's Station District or the Decoto Road area, our Sunnyvale office on Hollenbeck Avenue is a direct drive along CA-237 W. Dr. Kung limits his practice exclusively to endodontics, performs every procedure under the Zeiss OPMI operating microscope, and provides a level of precision and focus not found in general dental practice.
Microscope-Guided Precision
Every procedure performed under the Zeiss OPMI operating microscope — the standard of care for specialist endodontics.
Same-Day Emergency Care
Tooth pain can't wait. We hold appointments for urgent cases every day, including weekends.
Your Dentist Stays Informed
A detailed clinical report goes to your referring dentist after every visit — you're in good hands, and so is your care team.
Serving the Union City community
Union City is about a 25-minute drive via 880 and 237. We see Union City patients regularly, often referred by general dentists in the Decoto and Alvarado neighborhoods when a case calls for a microscope, J. Morita Veraview X800 CBCT imaging (Endo Mode), or microsurgical skill that a general office isn't set up to provide.
Neighborhoods we see patients from
- Decoto
- Alvarado
- New Park / Mission
- Old Alvarado
- Gateway / BART corridor
Why Union City patients come to us
- Microscope-guided root canal treatment
- Retreatment of previous root canals
- Apicoectomy / endodontic microsurgery
- Cracked-tooth evaluations
Driving from Union City
From Union City take 880 south to 237 west, exit Lawrence Expressway south, then left on Hollenbeck. 23–30 minutes outside commute hours.
Treatments Available
All services are performed at our Sunnyvale office, a short drive from Union City.
Root Canal Treatment
Single or multi-rooted teeth treated under the operating microscope for precision and comfort.
Endodontic Microsurgery
Apicoectomy when retreatment isn't feasible — performed with surgical-grade magnification and ultrasonic instrumentation.
Root Canal Retreatment
Failed or symptomatic prior root canals rescued with advanced imaging (CBCT) and microsurgical techniques.
Cracked Tooth Evaluation
Diagnosis of incomplete fractures — the most common cause of unexplained tooth pain.
Emergency Root Canal
Same-day evaluation and management of severe toothache, swelling, and dental trauma.
What Patients Say
4.9 stars across 193 reviews on Google, Yelp, and Healthgrades.
"I was terrified of root canals. Dr. Kung made it completely painless. I actually fell asleep during the procedure."
— Patient from the South Bay
"Came in with severe tooth pain on a Saturday. They saw me within the hour and I was pain-free by evening."
— Emergency patient
"The most technologically advanced dental office I've ever visited. The microscope setup is impressive."
— Referred patient
Common Questions
How far is your Sunnyvale office from Union City?
We're at 1565 Hollenbeck Avenue, Suite 106, Sunnyvale — about 14 miles and 17 minutes from Union City via CA-237 W. Free parking is available on-site.
Do you offer extended hours for Union City patients?
Yes. We're open Monday–Friday until 7 pm and Saturday–Sunday from 8 am to 3 pm — so you can schedule around work and family commitments.
Is Dr. Kung a specialist endodontist?
Yes. Dr. Kung is a Specialist Endodontist who completed a full two-year graduate residency and earned his MS in Endodontics from OHSU. He is an active member of the American Association of Endodontists (AAE). His specialist credentials come from his accredited graduate residency and MS degree in Endodontics.
Can I get a same-day root canal from Union City?
We hold emergency slots every day including weekends. Call (669) 234-2354 as early as possible and we'll do our best to see you the same day.
Will my Union City dentist receive notes after my visit?
Absolutely. A detailed clinical report is sent to your referring dentist after every appointment to keep your care coordinated.
Easy access from: Union City BART Station · Union Landing Shopping Center · Quarry Lakes Regional Recreation Area · I-880 / Alvarado-Niles Road · CA-237 connector
Also serving nearby communities:
Ready to Schedule?
Most Union City patients reach us in under 15 minutes. Same-day appointments available for dental emergencies.
1565 Hollenbeck Avenue, Suite 106, Sunnyvale, CA 94087