Dr. Kolnick talking to patient

Thank you for your interest in Advanced Endodontics of Westchester and The Endodontic Microsurgery Group (the surgical side of our practice), a laser-assisted microendodontic practice dedicated exclusively to all phases of non-surgical and surgical endodontic care.
As specialist members of the American Association of Endodontists, Dr. Justin Kolnick, Dr. Kara Diamond, Dr. Keith Hope, and Dr. Spencer Svetcov are committed to providing the highest standard of professional care for your patients in a friendly, comfortable environment.

Our Philosophy
“From your office to our office; from our home to your home; One family”

This embodies the philosophy of our practice. We see ourselves as an extension of your office, where everything we do reflects not only on ourselves but also on you, our referrer.

We are committed to performing at the highest level, sparing no cost to bring to you and your patients the very best treatment available through advanced techniques and cutting-edge technology. From initial diagnosis, relying on three-dimensional Cone Beam Computed Tomography (CBCT); to unparalleled magnification and illumination from the very best quality surgical microscopes; to the latest techniques based on sound research and using the finest microsurgical instrumentation.


Our practice was established in 1954 by Dr Marvin Firdman and was one of the first specialty endodontic practices in Westchester County. Dr Kolnick joined the practice in 1982 and with the introduction of the operating microscope, he pioneered microendodontics in the county. Dr Diamond joined in 2003, Dr Hope in 2006, and together with Dr Kolnick are committed to performing the highest level of endodontics in state-of-the-art facilities.

In 2011, The Endodontic Microsurgery Group was established in a unique center for endodontic microsurgery. This one-of-a-kind facility is dedicated exclusively to endodontic microsurgery and sedation. Visit us at www.endosurgerycenter.com for more information.


Office hours are Monday – Friday from 8:30 am to 5:00 pm and Saturdays from 8:30 am to 1:00 pm. The Mt. Kisco office is closed on Saturdays.

We hope that you find our website helpful and informative. If you would like additional information, please don’t hesitate to contact us with the information below.

We look forward to being of service!

White Plains Office
222 Westchester Ave, Suite #402
White Plains, NY 10604
New Patients: (914) 750-4033
Current Patients: (914) 946-2218
Map & Directions

Mt. Kisco Office
359 E. Main Street, Suite #3H
Mount Kisco, NY 10549
New Patients: (914) 750-4034
Current Patients: (914) 666-0707
Map & Directions