• Our Partners

    Dr. Gregory Seiden


    New York

    Dr. Gregory Seiden is a dentist in Levittown, NY who uses state-of-the-art dental materials and treatments with a gentle, caring touch.

    He enjoys getting to know each patient as a person in order to practice health-centered, caring dentistry. Dr. Seiden enjoys educating patients before treatments in addition to staying ahead of the technology curve.

    In 1980, he received his bachelor’s degree from SUNY Binghamton. In 1985, he received his Doctorate of Dental Surgery degree from NYU. Dr. Seiden completed his residency in 1986 at the Northport (Long Island) VA Medical Center and the Long Island Jewish Medical Center when he was also a clinical assistant professor at Stony Brook.

    Currently, Dr. Seiden enjoys continuing education courses regarding aesthetic dentistry, Invisalign®, and implant dentistry. He is an active member of Nassau County Dental Society, the American Dental Association, and New York State Dental Association.

    Dr. Seiden welcomes you to Seiden Dental Excellence!

    Dr. Sam Kleitches: Sam J. Kleitches DDS | Charlotte, NC
    I’ve been practicing since ‘89, and my top priority has always been the care of my patients. The Guardian partnership allows me to focus on my patient care, maintain the highest standards of dentistry, and do the work that I love without the stresses that come with running a business.– Dr. Kleitches
    Dr. Jake Moon: Savannah Dental Care| Aubrey, TX.
    I can keep doing what I’m doing while working toward partnership.– Dr. Jake Moon
    Dr. Yu: Carp Dental | Philadelphia, PA
    Guardian is different. They recognize potential and award partnership benefits right away.– Dr. Yu
    Drs. Hisham Barakat, Sanae Berrada, Uzma Ansari | Virginia
    Our initial and continued partnership with GDP has exceeded our expectations. We used to dream about the success we’re having as a group now. This has truly been a transformational experience in so many ways for everyone on our team.– Hisham Barakat
    Drs. Amit Ganglani, Joti Johal, Thayer Bouali, and Richard Dunning: Fresh Dental | Charlotte Metro
    We’ve always had a clear vision of what our Fresh Dental brand could become. Guardian has helped us focus on bringing that vision to life. We’ll be building new practices, adding great partner practices to our team across our region, and continuing to grow our legacy business. We’re so excited for what’s to come.– Dr. Joti Johal