
Oakdale
Oakdale's trusted pediatric dentist for Long Island families
Serving children and teens across Oakdale, Sayville, Bohemia, Patchogue, and beyond — with a seamless, anxiety-free experience from the very first visit.
Four dedicated providers. One dental home your family can trust.Dr. Viet Tran, Dr. Gabrielle Fusco, Dr. Erin Diamantakis & Dr. Ally Sullivan
Our Oakdale team is led by Dr. Viet Tran, a pediatric dentist with over 14 years of experience, a DMD from Boston University School of Dental Medicine, and advanced pediatric training at Stony Brook University Hospital — where he continues to serve as Clinical Assistant Professor. Dr. Tran founded Smile First with a clear mission: to eliminate dental anxiety by establishing a dental home early and creating an experience that families genuinely look forward to. Alongside him, Dr. Gabrielle Fusco and Dr. Ally bring compassionate, patient-paced pediatric care to every visit, while Dr. Erin Diamantakis serves as our in-house orthodontist — meaning your child can receive everything from their first cleaning to braces or Invisalign all under one roof, with a team they already know and trust.

What makes Smile First different
A pediatric dental experience designed around your child — not the other way around
At our Oakdale practice, every detail has been intentionally designed to reduce anxiety, build trust, and make dental care something children feel proud of. From the first phone call to the final prize at the end of the visit, we've built a practice where kids feel safe, parents feel informed, and families keep coming back — not because they have to, but because they want to.

A seamless experience from the first call
Our team is trained to make scheduling easy, set clear expectations, and verify your insurance benefits before your appointment, so there are no surprises when you arrive. We use trust transfers throughout every visit to make sure your child is never left unattended or unsure of what comes next.
Advanced technology for more accurate care
We use Overjet AI-powered radiograph analysis and iTero digital scanning to give our doctors a clearer, more precise picture of your child's oral health. This means more accurate diagnoses, more transparent conversations with families, and better-informed treatment planning from day one.
In-house orthodontics
With Dr. Erin on our team, families never have to choose between their pediatric dentist and an orthodontist. We offer Phase 1 early interceptive treatment, Invisalign, traditional braces, ceramic braces, and space maintainers, all coordinated directly with your child's ongoing preventive care.
Sedation options for anxious patients
We offer nitrous oxide and IV/general anesthesia with full OR privileges, making us one of the few pediatric practices on Long Island equipped to care for highly anxious patients, special needs patients, and complex cases in a safe, supportive environment. No child is turned away because their needs are too great.
Everything your child needs, all in one place
From first-tooth cleanings to orthodontics and sedation, we offer comprehensive pediatric dental care designed to grow with your child.
Pediatric preventive dentistry
Regular cleanings, fluoride treatments, digital X-rays, and dental sealants help protect your child's smile from the very first visit and build the healthy habits that last a lifetime.
Special needs dentistry
We proudly offer sensory-friendly appointments, infant dentistry, and a fully judgment-free environment for children who need extra patience, flexibility, or specialized care.
Children's orthodontics
Our in-house orthodontist offers everything from Phase 1 early interceptive treatment and space maintainers to Invisalign and traditional braces — so your child's orthodontic care stays connected to the team they already trust.
Pediatric dental emergencies
When something unexpected happens, we're here — offering same-day appointments and Saturday availability so your child gets the care they need without the wait.
Take a look around
Our Oakdale office is designed to feel cheerful, comfortable, and completely kid-friendly — from the moment you walk in to the moment your child picks their prize from the vending machine on the way out. We've thought about every detail so your family feels at home.
Easy to find, easy to get to
Our Oakdale office is conveniently located on Montauk Highway with straightforward access for families throughout Oakdale, Sayville, Bohemia, East Islip, and Patchogue.
Keeping great care within reach
We work with most major PPO insurance plans and verify your benefits before your appointment so there are no unexpected costs at checkout.

