East Bay Endodontic Specialists

Specialized care to relieve tooth pain and help save your natural tooth.

Whether your dentist referred you for a root canal or you are dealing with sudden tooth pain, swelling, or dental trauma, our endodontic team provides focused care with clear guidance from the first visit.

Schedule an Appointment Dental Emergency
28 years in practice
4.7★ on Yelp 4.88★ Google · 594 Reviews 98% Referral-Based Same-Day Emergency · 4 Locations

Practice Statistics

0 ★ Yelp Rating #1 Endodontist in Oakland
0 ★ Google Rating 594 reviews · 4.88 avg · 4 locations
Featured Treatment Available at all 4 locations

GentleWave root canal.
One visit. Exceptional outcomes.

GentleWave reaches the parts of your tooth that traditional files physically cannot. It cleans the entire root canal system in ways instruments alone never could. I've used every system in 28 years of practice. Nothing comes close.

"Field-changing. That's how I would describe it." We make GentleWave available to every patient at our 4 locations — not as an upgrade, but as the standard. Every doctor in this practice has been the standard of care here since 2019. None of them would go back.

Outcome Endospecialists Data
Single-visit completion 92.1%
Mild to no pain post-procedure 96.6%
Complete healing within 12 months 97.7%
Available at Endospecialists All 4 locations · since 2019
Sources: Sigurdsson et al. (2016) J Endod. 42:1040–48 · Sigurdsson et al. (2018) J Endod. 44(3):510–517 · Sonendo, data on file
Learn About GentleWave

96.6% of patients report mild to no pain after the procedure — Sonendo, data on file. The pain most patients fear going in is the infection they arrived with. Not the treatment.

Diagram showing GentleWave Multisonic Ultracleaning technology cleaning the full root canal system

"I'm not saying that to sell you a procedure — I'm saying it because it changes what's possible for your tooth."

— Dr. Priya O'Callaghan, Founder

96.6% of patients report mild to no pain after their GentleWave procedure. The pain most patients fear going in is the infection they arrived with — not the treatment.

Sonendo, data on file
Endospecialists Oakland — office interior corridor
Founder — Dr. Priya O'Callaghan

28 years. Her word.
Her conviction.

Dr. Priya has lead Endospecialists since 1998 and has built the East Bay's only large independent endodontic practice — four locations, a referral network of ~200 dentists, and 98% of patients arriving by referral. That's not marketing. That's 28 years of honest results.

She trained at the University of Southern California. She works in the clinic four days a week. When something goes wrong, she picks up the phone — because it is her practice and her responsibility.

"She was precise, focused and meticulous, but above all, she was warm and attentive to any of my reactions."

— Google Review 2022, Hayward ⭐⭐⭐⭐⭐
Meet Dr. Priya
Independent Practice

"We're one of the only large private practices around. We're staying that way — because we don't want a bank telling us what to do for you."

— Dr. Priya O'Callaghan, Founder

Endospecialists is independently owned. We have not sold to private equity. That's a choice Dr. Priya has made deliberately, over 28 years, because she believes the treatment room should answer to the patient — not to a board of investors.

We have no investors. Every treatment decision Dr. Priya and her team make serves the person in the chair. When there's a problem, you call Dr. Priya — not a patient services line.

Why Independent Practice Matters

In pain? We're open.

Pain cases seen same day across all locations Oakland open Saturdays 9–5 · Sunday emergencies accommodated
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Seven things patients say
matter most — and why
we built for them.

482 patients wrote reviews. 72 said 'highly recommend' without being asked. These eight things are what their words point to — the reasons they came anxious and left converted.

  • 01
    Full Technology Suite — Every Location GentleWave, EdgeEndo laser, CBCT imaging, and surgical microscopy at all four offices. Not available at one flagship — available everywhere, every day.
  • 02
    Same-Day Emergency Access Pain cases are seen the same day across all four locations. Oakland is open Saturdays, 9–5. For genuine Sunday emergencies, the team comes in. That's not a policy statement — that's how this practice has operated for 28 years.
  • 03
    Independently Owned The only multi-location endodontic practice in the East Bay not backed by private equity. That's a structural fact with direct clinical consequences.
  • 04
    Trained to One Standard Dr. Priya trained at USC. Dr. Kim completed his endodontics residency at Columbia. Every doctor in this practice works under the same clinical philosophy she has applied for 28 years: when you get up from that chair, it should be the best that could have been done.
  • 05
    GentleWave — Standard of Care Since 2019 We don't offer GentleWave as an upgrade. We use it on every patient at every location — since 2019. 92%+ complete treatment in a single visit. 97%+ experience complete healing within 12 months.
  • 06
    28-Year Referral Network Approximately 200 referring dentist relationships, built over nearly three decades through personal contact and clinical results alone. No advertising budget built this.
  • 07
    4-Location Scale, Private Values Large enough to absorb volume and offer same-day emergencies. Small enough to make every case a matter of personal accountability.
Our Team

Specialist doctors.
One practice.

Dr. Priya founded Endospecialists in 1998 and built the team around a single standard: when you get up from that chair, it should be the best that could have been done. Every doctor in this practice works to that benchmark — across all four East Bay locations, under one independently owned practice.

Meet the full team

Patient Reviews

What patients say
after GentleWave.

Endospecialists is rated 4.7 stars across Google and Yelp and ranked #1 endodontist in Oakland. The reviews below are verified patient reviews — unedited.

★★★★★
""You need a root canal" is an unwelcome statement that usually evokes, if not fear exactly, at least high anxiety. Dr. Priya O'Callaghan has completely eliminated that, to the point where I will almost surely look forward to any future root canal work."

Verified Google Review 2025 · Hayward patient

★★★★★
"I had to travel overseas and had a tooth issue just the day before international travel. The Hayward office was amazing to fit me in last minute. Dr. O'Callaghan was just amazing. She explained every step of the procedure."

Google Review 2024 · Hayward

★★★★★
"Great office. Wonderful staff. Easy, comfortable experience. Quick, too! I absolutely recommend this office."

Google Review 2025 · Hayward

★★★★★
"I was referred by my primary dentist. The doctor was very kind and gentle. She explained everything in great detail and even drew a little diagram for me."

Google Review 2025 · Hayward

Elfsight review widget — 4 Google Business Profiles + Yelp · 4–5★ filter · auto-updates (install post-launch)

View all patient reviews
For Referring Dentists

Refer with confidence.
Your reputation is safe here.

Endospecialists has maintained referral relationships for 28 years — nearly 200 practices across the East Bay. Dr. Priya converts 80% of dentists who meet her in person. This page is her attempt to give you the same conversation without requiring a dinner.

GentleWave at every location. Specialist-to-specialist communication after every case. No unsolicited general dentistry — ever.

What we guarantee every referring practice:

  1. 1. Specialist-to-specialist communication after every case
  2. 2. No encroachment on general dentistry — ever
  3. 3. Same-day emergency access · Oakland open Saturdays 9–5
  4. 4. GentleWave at every location — since 2019
  5. 5. A practice you can stake your own reputation on referring to
Four Locations

East Bay endodontic care —
close to where you are.