Meet the Team

Clinical Director

Robert Grunstein, DMD

The founder of Smile Central Dental, Dr. Grunstein — or Dr. G as he is affectionately called by his patients — was formally trained at Temple University Kornberg School of Dentistry and graduated in 2001. Upon graduation, Dr. Grunstein began his career working in Paterson at a busy inner-city dental clinic where he recognized an acute need for greater access to affordable dental services in the community.

Dr. Grunstein spends much of his time educating the community and policymakers on the importance of dental care for all children. He has been recognized with many prestigious awards for his innovative approach to dentistry by pioneering the concept of the Cavity Fighter truck, a mobile dental operatory. Dr. Grunstein is the recipient of the Richard Tannis Youth Service Award for his work in promoting children’s dental health in New Jersey.

In addition, he has served on the Mayoral Task Force Committee to promote further wellness in Paterson. He has also been recognized by Healthy Mothers, Healthy Babies, New Jersey Horizon Healthcare, Yeshiva University, and the State of New Jersey General Assembly for his work. He has been lauded in many publications, including The New York Times, Bergen Record, and the Star-Ledger for his commitment to dental health outreach.

Dr. Grunstein works tirelessly to raise awareness of access to dental healthcare for children and the importance of preventive dental health. When he is not working on children’s dental health, Dr. Grunstein is at home, playing with his own three children and his two Labradoodles Snickers and Mack. He also enjoys camping and working on his Jeep.

Dr. G’s Favorites:

  • Superhero: Tarzan
  • Movie: “Meet the Robinsons”
  • Food: Fried chicken and fries

Jonathan Noll, DMD

Dr. Noll grew up in Clifton, New Jersey and attended Rutgers School of Dental Medicine. He loves science and it is one of the reasons he became a dentist. His favorite part of his job is working with children and making a difference in the community.

In his free time, Dr. Noll loves to read. His favorite book is Something Wicked This Way Comes

Dr. Noll's Favorites:

  • Disney Character: Scrooge McDuck
  • Superhero: Starman
  • Food: Pierogies

Ghada Mubarez, DDS

Dr. Mubarez grew up in New York City and attended NYU. She describes herself as an artist and says that she became a dentist because dentistry combines art and medicine. She loves working with children which is her favorite part of her job.

In her free time, Dr. Mubarez loves taking walks in the parks and LOVES amusement parks.

Dr. Mubarez's Favorites:

  • Disney Character: Mulan (because she's tough!)
  • Book: Fire Starter
  • Food: Junk! French fries and burgers

Hong Yin,  DDS (Ortho)

Dr. Hong Yin was born in China but grew up in Ohio. She moved to New York for college where she attended Columbia University.  She became a dentist because she always wanted to work in the healthcare field. Her favorite part of her job is solving the puzzle of each orthodontic case.

In her free time Dr. Yin loves spending time with family, eating and playing tennis, She also enjoys spending time with her dog, Sam.

Dr. Yin's Favorites:

  • Disney Character: Ratatouille
  • Book: Catcher in the Rye
  • Food: Sushi

Jonathan Sipzner, DMD

Dr. Jonathan Sipzner grew up in West Orange, New Jersey. He attended the University of Medicine and Dentistry of New Jersey. He works hard every day to make all the young patients he sees a smile when they leave the office.

At home, Dr. Sipzner enjoys singing, snowboarding, and playing with his dog Snickers.

Dr. Sipzner’s Favorites:

  • Disney Character: Olaf
  • Movie: “Pinocchio”
  • Food: Hot Dogs


Nneka Obi, DDS

Dr. Obi grew up in East Orange, New Jersey, and attended Montclair State University and Meharry Medical College. She has been in the dental field since 2012 and loves to educate her patients and their families about oral hygiene.

When Dr. Obi isn't educating her patients she loves to watch movies, work out, and play tennis.

Dr. Obi's Favorites:

  • Disney Character: Princess Tiana
  • Superhero: Spiderman
  • Book: The Color Purple
  • Food: Everything

Stephanie Jacobovits, DMD

Dr. Jacobovits grew up in Passaic Park, New Jersey and attended NJIT and Temple University Kornberg School of Dentistry. Her favorite thing about being a dentist is being able to fix a problem and watching her pediatric patients grow into adults.

When Dr. Jacobovits isn't fighting cavities she loves to read, work on puzzles and hang out with friends and family.

Dr. Jacobovits' Favorites:

  • Disney Character: Mulan
  • Book: The Queen of Attolia
  • Food: Chocolate

Ameet Patheja, DMD

Dr. Patheja grew up in Philadelphia, Pensylvania, and attended Cornell University and Tufts University School of Dentistry. His favorite part about his job is being surrounded by his awesome patients and colleagues. He has been working in the dental field since 2016.  

In his free time, Dr. Patheja loves watching sports especially from his hometown -Philly (GO EAGLES!). He does not have any pets but hopes to get one and name him/her Pikachu.

Dr. Patheja's Favorites:

  • Superhero: Batman and Spiderman
  • Food: Pizza

Jessica Hughes-Burnett, DDS

Dr. Hughes-Burnett grew up in Silver Sping, Maryland and Stone Mountain, Georgia. She attended Meharry Medical College in Tennesse and did her reseidency in Findlay, Ohio. She has been working in the dental field since 2018 and her favorite part of her job is laughing with the kids she treats. She is a dog lover but has no pets right now and in her free time she loves to shop and watch documentaries. 

Dr. Hughes-Burnett's Favorites:

  • Disney Character: Princess Tiana
  • Book: Makes Me Wanna Holler by Nathan McCall
  • Food: Colard Greens


Dr. Robert Grunstein (Paterson, Passaic & Union City)

Dr. Jonathan Noll (Paterson)

Dr. Ghada Mubarez (Paterson)

Dr. Jonathan Sipzner (Paterson & Passaic)


Dr. Hong Yin (Ortho)

Dr. Nneka Obi (Union City)

Dr. Stephanie (Passaic)

Dr. Patheja (Paterson)





Iulia Iliescu (Paterson & Passaic)

Rizwan Shafi (Paterson)

Alexandra Moreta (Paterson)

Stephanie Rocha (Paterson & Passaic)

Shareen Sharif (Paterson)

Karen Baez (Passaic)

Benjarak Doyle  (Passaic)

Christopher Laporta (Passaic)

Marie Pena  (Paterson)

Melissa Rosario (Union City)

Sarah Shafi (Union City)

Kristina Garcia (Union City)



Office Managers

Cristal Jimenez

Francheska Jimenez

Esther Toledo

Inocencia Troncoso
(Union City)

Omayra Lopez
( Paterson )

Kendally Reyes
( Clinical )

Ailiceth Almonte
( Administrative )

Maria Gutierrez

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Hours of operation vary by location. Please click on your desired office location for specific details: