• 01
  Full Technology Suite — Every Location Patients who visit our Berkeley, Hayward, or El Cerrito offices receive the same treatment as those seen in Oakland — without being redirected to another office. That's by design: the same state-of-the-art technology, including GentleWave, CBCT imaging, EdgeEndo laser, and surgical microscopy, is available at all four locations, every day.
• 02
  Same-Day Emergency Access The reviews that mention pain almost always mention the same thing: they were seen that day. We hold same-day slots for pain cases at all our four locations — our Oakland office is open Saturdays.
• 03
  Independently Owned What patients notice — without knowing why — is that nobody rushed them, nobody pushed a treatment they didn't need, and the recommendation felt like it came from a doctor, not a system. That's what independent ownership looks like from the chair.
• 04
  Trained to One Standard Patients who saw different doctors across different visits said the same thing: the standard didn't change. Dr. O'Callaghan trained at USC and has spent 28 years building a collaborative network of specialists around a single philosophy: when a treatment is complete, it must be the absolute best work possible.
• 05
  GentleWave — Standard of Care Since 2019 The reviews that stand out most are from patients who'd had a root canal before — somewhere else. They expected the same experience and got something completely different: one visit, minimal discomfort, back to normal the next day. That's GentleWave — recommended to every patient at every location since 2019, and accepted by nearly all of them.
• 06
  28-Year Referral Network Most of our patients come to us through their dentist. That trust — between us and the dentists who refer to us — is earned slowly: over 200 referring relationships, built over 28 years through personal contact and clinical results alone. No advertising. Just word-of-mouth.
• 07
  4-Location Scale, Private Values Patients consistently note two things that seem contradictory: they were seen quickly, and they didn't feel rushed. Four locations gives us the capacity for same-day emergency care; independent ownership means every case still gets our personalized, undivided attention.

Our Team

Specialist doctors.
One practice.

The doctors below didn't all come from the same school or the same city. They're independently contracted specialists who chose to practice together. What they share is a standard Dr. O'Callaghan brought with her when she joined in 2003, and one this practice has held since 1974: when you get up from that chair, it should be the best that could have been done.

Patient Reviews

Four Locations

East Bay endodontic care —
close to where you are.