Meet Our Doctors


Glenn S. Ludwig, D.M.D.

Glenn S. Ludwig in Plainview

Dr. Ludwig has been a practicing periodontist since 1984. He received his dental degree from the University of Pennsylvania College of dentistry in 1981. Dr. Ludwig completed a general practice residency in 1982 at North Shore University Hospital and fellowship in Periodontics in 1984 at the University of Pennsylvania. In 1989, he earned his Periodontal Board Certification, diplomat status. He is a member of the American Academy of Periodontology, Academy of Osseointegration, Northeastern Society of Periodontists, Long Island Academy of Periodontics, American Dental Association, New York State Dental Association and the Nassau County Dental Society.

Through his many affiliations and extensive research, Dr. Ludwig continues to keep the Long Island dental community informed of any and all innovations in treatment planning. While maintaining a full-time practice in Plainview, Dr. Ludwig continues to teach as an attending physician at North Shore University Hospital, Manhasset New York, and at New York Hospital Queens, Flushing, New York. Dr. Ludwig has participated in, and lectured for, many study groups and dental schools including, but not limited to, Boston University and Stony Brook. In 1992, he founded and still directs the Greater Long Island Study Group (GLISG). This unique postgraduate curriculum offers continuing education to general dentists within local area. Under the guidance of Dr. Ludwig, the study group invites nationally and internationally known experts to discuss their findings on state-of-the-art topics and procedures. The GLISG is accredited by the New York State Dental Association and the Academy of General Dentistry. In addition, Dr. Ludwig publishes a quarterly newsletter, "Update on Periodontics", enabling him to share his knowledge of the most recently published literature. The newsletter is available to local practitioners who wish to benefit from Dr. Ludwig's expertise in comprehensive treatment planning.

Dr. Ludwig can be reached by email at

Sylwia K. Rostkowski, D.M.D.

Dr. Rostkowski in Plainview

Dr. Rostkowski earned her dental degree from University of Medicine and Dentistry of New Jersey in 2008. She completed a general practice residency at North Shore University Hospital and received her Certificate in Periodontics at the University of Medicine and Dentistry of New Jersey in 2012. She teaches as an attending physician at Winthrop University Hospital.

At UMDNJ, Dr. Rostkowski received the Quintessence Award for Clinical Achievements in Periodontics. She recently had an article published in the International Journal of Periodontics & Restorative Dentistry (January/February 2014), entitled “Reconstruction of the Narrow Ridge Using Combined Ridge Split and Guided Bone Regeneration with rhPDGF-BB Growth Factor-Enhanced Allograft”.

Dr. Rostkowski is a participating provider for the following insurance companies: Aetna, CIGNA, Delta Dental, Guardian and MetLife.

Katherine B. Calvert, D.D.S.

Dr. Calvert in Plainview

Dr. Katherine Calvert is a Periodontist with training in the complete spectrum of periodontics and implant surgery, with a focus in hard and soft tissue regeneration and full mouth restoration.

Dr. Calvert graduated with a Bachelor of Science in Biology from the University of North Carolina at Chapel Hill. She then continued her education at Columbia University College of Dental Medicine in New York City, receiving her Doctorate of Dental Surgery in 2015.

After completing dental school, Dr. Calvert chose to attend one of the top specialty programs in the country at the University of Alabama at Birmingham to complete a 3-year postgraduate residency program in Periodontics. Her main focus is providing individualized and comprehensive patient treatment to every single patient. Dr. Calvert is trained in extensive treatment planning, periodontal plastic surgeries, dental implant surgeries, and full-mouth rehabilitation. She is very interested in continuing education to always keep on the cutting edge of periodontal research and treatment. She has attended the Pikos Institute Course on Sinus Grafting for Implant Reconstruction and a course by Dr. Istvan Urban on Horizontal and Vertical Ridge Augmentation. She is passionate about outreach and helping the community and has volunteered at free clinics in various states and an outreach mission trip to Monte Christi, Dominican Republic.

Dr. Calvert is a member of the American Academy of Periodontology, Northeastern Society of Periodontists and the Southern Academy of Periodontology.

In her spare time, she enjoys hiking, rock climbing, being outdoors and traveling to new countries.

Meet Us

Office Hours

Monday:  8:00am - 6:00pm
Tuesday:  9:00am - 7:00pm
Wednesday: 10:00am - 6:00pm
Thursday:  8:00am - 7:00pm
Friday:  8:00am - 2:00pm
Saturday:  By Appointment Only

1097 Old Country Road, Suite 206
Plainview, NY 11803
Phone: (516) 681-9500