A R Periodontics Team

Our friendly and experienced staff are ready to help you maintain your healthy smile. We put our patients first, prioritizing their needs, answering all of their questions, and offering a safe and comfortable environment for their dental treatment. Our patients stay with us for decades in part due to our staff’s high level of care. We work hard to repay the trust they put in us so you can rest easier knowing you are in caring hands when you visit A R Periodontics.


DIANE ROTHSTEIN | Office Manager, Patient Care Coordinator

Diane Rothstein, Office Manager and Patient Care Coordinator at A R Periodontics
Diane Rothstein has been with us at A R Periodontics since July 2008. Like so many others, dentistry is her calling. In high school, Diane worked part-time as a dental assistant for her local dentist. She attended BOCES in Valhalla, NY, where she received her certificate in dental assisting. She worked as a dental assistant for 10 years before hanging up her scrubs to become an office manager. Diane has kept her skills fresh and continues to maintain a license for dental radiology in New Jersey. Diane moved from New York to New Jersey in 2005.

As our office manager and patient care coordinator, Diane is the face of A R Periodontics. Hers is the smile that will greet you when you walk into our office. Diane will help you with appointment scheduling and assist in coordinating treatment between our office and other dental offices when necessary. Over the years Diane has learned much about dental insurance and will do her best to answer all your questions. She will go over treatment with you, discuss your insurance coverage (including benefits, limitations, and copayments), and present payment options.

In her spare time, Diane enjoys exercise, reading, watching NASCAR and NJ Devils hockey, and spending time with her cats, Tiger and Smokey.


SARAH ROSENTHAL | Registered Dental Assistant, Patient Care Coordinator

Christine Aungst, Dental Hygienist at A R Periodontics
Sarah Rosenthal is our registered Dental Assistant and Patient Care Coordinator who has assisted in the field of dentistry since graduating Berdan Institute in 1993. She originally began working in general dentistry doing instrument sterilization while in high school as part of a work-study program. After graduating from Berdan, she worked in general dentistry and pediatrics, finally settling into orthodontics in 1995 where she has been until now. Sarah recently began working at A R Periodontics to expand her knowledge and love for dentistry. She enjoys bonding with patients of all ages and feels it’s an important part in giving someone a great smile.

Sarah has resided in Randolph since 1995 and has two children. She officiates high school track when she’s not in the office, and volunteers for a non-profit cat rescue to find homes for her four legged friends.


SANDRA TANIS | Registered Dental Hygienist

Sandra, Dental Hygienist at A R Periodontics
Sandra is the most recent addition to A R Periodontics. She graduated from Rutgers University in 2018 and has been practicing ever since. In addition to providing optimal care, Sandra’s goal is to make her patients comfortable with her gentle touch. Outside of the office, Sandra enjoys making memories with her friends and family.
Ready to Improve Your Smile?

It's Your Smile. Let's Keep It Healthy for a Lifetime.

(973) 625-1491 Appointments