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Top Rated Bergen County Family Dentist in Old Tappan, New Jersey

Welcome to the Pediatric/Adult and Orthodontic Dental website of Dr. Andrea M. Mattia, Dr. Anushia Sivendran, Dr. Katerina Mlejnkova, Dr. Kellyann Metz, and Dr. Deepa Ramasamy. We strive to provide our patients with conservative yet definitive treatment, explaining any necessary treatment thoroughly. We are conveniently located in northern Bergen County, just one mile from the Rockland County, New York border in a new, modern office equipped with today’s latest technology. We are available to serve you by appointment and for emergency treatment can be reached 24 hours a day.

We offer complete comprehensive dental care for children, adolescents, adults, and patients with special needs from routine check ups to more complex treatment including, if necessary, nitrous oxide or general anesthesia. This includes dental restorations, extractions, and orthodontics. Our staff consists of dental hygienists, dental assistants, and office personnel who are always ready to assist you in any way possible.

Our goal is to have your child’s introduction to dentistry be a positive and fun experience. We aim to achieve and maintain the best oral health for your child in a loving, caring environment that is pleasant for the child, parent, and dental team. Parents are always welcome in the treatment area with their children. We look forward to meeting you and your child.


Meet The Doctors

Learn Who We Are

  • Dr. Andrea M. Mattia

    Dr. Andrea M. Mattia opened her practice in Old Tappan, New Jersey in 2004, after practicing for more than six years in Tappan, New York.

    She is a graduate of the New York University College of Dentistry, with four years of post-graduate training. She completed three years at the Montefiore Medical Center, including two years in the department of pediatric dentistry. In addition, Dr. Mattia completed a fellowship at the Rose Kennedy Dental Center, specializing in the treatment of children with special needs.

    Dr. Mattia is board certified by the American Academy of Pediatric Dentistry, and has extensive training and practice in all phases including preventive, restorative, minor orthodontics, esthetic, and hospital dentistry. She currently has staff privileges at Montefiore Nyack Hospital in Nyack, New York.

    Dr. Mattia is an active member of the Academy of Pediatric Dentistry and is a diplomat of the American Board of Pediatric Dentistry.

    Dr. Mattia lives with her husband and three children in Northern New Jersey. She volunteers at her children’s school and works on various committees throughout the school year. She is also an active member at her local church. She loves the beach, long walks with her dog, and spending time with her family.

    Specialty permit # 5558

  • Dr. Anushia Sivendran

    Dr. Sivendran received her BA at Gettysburg College and graduated from the University of Pennsylvania with her degree in Dental Medicine. She completed her general dentistry residency at Lehigh Valley Health Network and practiced for more than two years. She then decided to pursue her passion for pediatric dentistry and went on to complete her pediatric dentistry training at Montefiore Medical Center.

    Dr. Sivendran is board certified by the American Academy of Pediatric Dentistry. She is an active member of the American Dental Association and the Academy of Pediatric Dentistry.

    Dr Sivendran is an exceptional practitioner of Pediatric Dentistry who truly enjoys working with children and their families to ensure a lifetime of healthy smiles.

    Dr. Sivendran resides in Rockland County New York with her husband and two daughters.

    Specialty Permit # 6304

  • Dr. Kellyann Metz

    Dr. Metz graduated from Fairleigh Dickinson with a degree in Dental Medicine. She brings over 25 years of experience to our office. She will be offering general dentistry for all adults and our graduated patients over the age of 21. That means your kids can stay here forever!

    Dr. Metz is a very professional and compassionate dentist and is a perfect fit for our growing practice. She will see to all your needs, including TEETH WHITENING.

    Dr. Metz loves the Jersey shore and has a real passion for anything Disney. She enjoys any and all moments spent with her husband, daughter, dog, and cat!

  • Katerina Mlejnkova

    Dr. Katerina Mlejnkova, or Dr. Katie to her patients, was raised in upstate New York where she received her bachelor's degree at the University of Rochester. Following her dental education at NYU College of Dentistry, she completed her specialty training in pediatric dentistry at Montefiore Medical Center.

    Armed with up-to-date knowledge and techniques in her profession, she is confident in her ability to provide your child with the dental care they need. Her main goal is to create a comfortable, communicative, and truly joyful experience for you and your child, and with her upbeat personality, Dr. Katie can’t wait to do just that!

    In her free time, Dr. Katie enjoys spending time with her ever expanding family, her friends, and her cat Roxy. She loves to run and race as part of the New York Road Runners, as well as traveling to experience the nature, hiking, and (most importantly) food that different places have to offer!

  • Dr. Deepa Ramasamy

    Dr. Deepa Ramasamy, commonly known as Dr. Deepa to all her patients. Dr. Ramasamy grew up in Pennsylvania and currently lives in Manhattan with plans to relocate to New Jersey. After graduating Valedictorian, she attended the Pennsylvania State University Schreyer Honors College where she graduated Magna Cum Laude with Honors in Biology. She then earned her Dental Degree from the University of Pennsylvania School of Dental Medicine where she was inducted into the Omicron Kappa Upsilon National Honor Society for graduating near the top of her class. She received her Certificate in Orthodontics and Dentofacial Orthopedics at the Montefiore Medical Center/Albert Einstein College of Medicine in the Bronx, NY while fulfilling the role of Chief Resident.

    In addition, Dr. Ramasamy served as a Captain in the United States Army for 5 years. She held numerous leadership roles and provided dental care to many of our soldiers throughout the country.

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Hours of Operation

Our Regular Schedule


8:00 am-6:00 pm


8:00 am-7:00 pm


9:00 am-6:00 pm


8:00 am-6:00 pm


9:00 am-6:00 pm


8:00 am-2:00 pm