Meet Our Team

Simon Roytberg, DDS​

General Dentist​

Dr. Roytberg is a graduate of University of Washington dental school, one of the best in the country. He has been a dentist for years and has been through several post graduate courses in different fields of dentistry since receiving his D.D.S. degree.

His emphasis on patient comfort as well as keeping up-to-date with the latest advancements in dentistry enable him to provide his patients with the best quality of care in the field. Dr. Roytberg has a wide range of experience in different areas of dentistry, from cosmetic and restorative dentistry to surgical treatments and root canal treatments.

His approach to your treatment starts with patiently listening to you. Then, after a complete and thorough examination, he reviews and discusses the diagnosis and treatment options with you.

“I am proud to provide my patients with the best in dental technology, treatment options, and patient comfort. It is my pleasure to address all your questions and concerns.”

Dr. Simon Roytberg

Vitaliy Fabrikant, DMD

General Dentist

Dr. Fabrikant graduated from Temple University School of Dentistry in 1997 and went on to complete an additional year of general practice residency at prestigious Eastman Dental Center, Rochester, NY.

Dr. Fabrikant has a conservative approach to dentistry, trying to save and restore natural dentition and reserving to extractions and subsequent implants only whenever is absolutely necessary. Dr. Fabrikant had an additional training in adult orthodontic “Invisalign” and widely incorporates this knowledge into treatment plans.

Dr. Fabrikant has been in private practice since 1999. He has completed hundreds of hours of continuing education seminars and courses. Pursuing a strong interest in endodontics, implantology, and cosmetic dentistry.

Dr. Fabrikant has experience in routine restorative services, crown and bridge as well as Root Canal treatments. He can perform endodontic therapy on multi-rooted teeth utilizing rotary Ni-Ti files which significantly reduces amount of time for Root canal therapy procedures.

Jovanka Zivkovic, DDS

General Dentist - Cosmetic Specialist

After receiving her degree from school for dental technicians in Belgrade with high honors Dr. Zivkovic attended School of Dental Medicine Pancevo, Serbia. As a top of the class graduate Dr. Zivkovic furthered her dental expertise and honed skills in a postgraduate residency program at the National Health Center in Serbia. Dr. Zivkovic received her MBA at Union University and continued her education in general dentistry in the Netherlands. Dr. Zivkovic completed her advanced program at Columbia University in New York and received training in Implantology, Endodontics, Oral Surgery, IV Sedation and Prosthodontics. For several years Dr. Zivkovic worked alongside top dentists in New York City.

Dr. Zivkovic is very committed to delivering the most up-to-date treatment to all her patients and is always on the forefront of continuing education, new treatment modalities and technology. She has trained with some of the nation’s most forward-thinking dentists in smile design and functional occlusion as well as cosmetics orthodontics ( Invisalign ). She understands that each person has a unique personality and specific dental needs and treats each patient as such. For this reason Dr. Zivkovic makes her top priority to comfort her patients and put them at ease before beginning even the simplest procedure.

Michael Chau, DMD

Board Certified Periodontist

Dr. Chau was born and raised in New Jersey and received his Doctorate degree from UMDNJ – New Jersey Dental School. After completing two hospital residencies and working in private practice for several years, he continued his training in the specialty of Periodontics at New York University, where he received the Clinician of the Year Award. Dr. Chau is recognized as a Board-Certified Periodontist by the American Board of Periodontology and is licensed to practice in New York and New Jersey.

Having been immersed in the educational setting for several years, Dr. Chau holds much respect for his past mentors and educators. He enjoys teaching and currently is a hospital attending and lecturer for dental residents at Lincoln Medical Center in the Bronx. He lives with his wife and baby daughter in Manhattan. He enjoys snowboarding, modern art, and is always on the lookout for new restaurants and cuisines to try out.

Dr. Chaus Professional Training and Memberships

  • University of Medicine and Dentistry of New Jersey, DMD
  • New York Presbyterian Weill Cornell Hospital – General Practice Residency PGY1
  • New York Hospital Queens – General Practice Residency PGY2
  • New York University College of Dentistry – Degree in Post Graduate Periodontics
  • Diplomate, American Board of Periodontology
  • Lincoln Medical Center – Clinical Attending
  • American Academy of Periodontology
  • Northeastern Society of Periodontists

Ryan Trulby, DDS, MS

Board Eligible Orthodontist

Dr. Ryan Trulby was born in Manhattan, raised just across the George Washington Bridge in Bergen County, New Jersey, and lives in Upper West Side. After graduating from Rutgers University, Dr. Trulby received his dental degree at Columbia University College of Dental Medicine, where he graduated number one in his class. During his time at Columbia, Dr. Trulby received several awards including the Alpha Omega Highest Academic Achievement Award, the Abraham and Martha Barnett Scholarship, and the Dean’s Scholar Award and Scholarship. 

Following his graduation from dental school, Dr. Trulby completed a 3 year postgraduate orthodontics residency at Columbia University as well, becoming highly experienced in providing child, adolescent, and adult orthodontic treatment with braces and Invisalign. He is also highly motivated to continue improving his clinical acumen and has taken multiple continuing education courses including the Aligner Intensive Fellowship, a rigorous 17 week course covering advanced child, adolescent, and adult Invisalign treatment.

Dr. Trulby’s Professional Training and Memberships:

• Diplomate, American Board of Orthodontics
• American Association of Orthodontists
• Northeastern Society of Orthodontists


Roxanna Khajavi, DMD

Board Certified Pediatric Dentist

Dr. Roxanna Khajavi (known as Dr. Roxy by her patients) grew up in Southern California. She attended UCLA for her undergraduate degree and studied biology. A couple years later, she moved to Boston to attend Tufts University School of Dental Medicine. Following dental school, she went on to complete both her General Practice and Pediatrics residencies at Maimonides Medical Center, where she served as Chief Resident in her last year.

Dr. Roxy is devoted to staying up to date on the latest information and technology in pediatric dentistry. She believes communication is one of the most important aspects of her practice and will take the time to explain all treatment options in depth with each family. She loves working with her young patients and is looking forward to bringing happy and healthy smiles to the community. In her spare time she loves to bake, do yoga, and garden.

Firas Marsheh, DDS


Dr. Marsheh earned his first Dental Degree from overseas, and practiced in underserved areas for 2 years focusing on Endodontic treatment before he moved to the United States. He received his Doctorate of Dental Surgery from New York University College of Dentistry, and earned his specialty degree in Endodontics in 2009 from Lutheran Medical Center in Brooklyn, NY.

Dr. Marsheh practiced General Dentistry for 1 year before entering the Endodontic Program to experience complete patient care. He has provided endodontic therapy to many patients. While completing his specialty training, Dr. Marsheh conducted research at New York University focusing on “Anxiety toward Endodontic Treatment”.

Dr. Marsheh’s philosophy for his practice is:
“To reduce the anxiety and stress that accompany an Endodontic Treatment experience, to provide each individual patient with care, comfort and knowledge prior to treatment. To treat and give each patient the optimal results in a short amount of time.”


Advanced Cosmetic & Rehabilitative Dentistry

Dr. Nosti graduated from the University of Medicine and Dentistry-New Jersey Dental School. He went on to complete a General Practice Residency at Lehigh Valley Hospital in Allentown, PA, a subsidiary of the University of Penn. Medical School.

Dr. Nosti has gone on to complete an extensive post-graduate education in Cosmetic Dentistry, Reconstruction Dentistry, Temporomandibular Joint Dysfunction (TMJ) and Occlusion (bite relationships). He started teaching as a Clinical Instructor with
The Hornbrook Group, and is now the Clinical Director of Education for The Clinical Mastery Series where he teaches dentists all over the world on how to diagnose and perform complex reconstructive and cosmetic dentistry.

Dr. Nosti has authored and is featured in numerous instructional DVD series for dentists. His expertise has allowed him to become an adjunct faculty member at the esteemed Arizona School of Dentistry and Oral Health. He serves on the editorial boards of numerous dental publications, and has been published in many journals including the prestigious Journal of the American Academy of Cosmetic Dentistry. He is also a key opinion leader for Ivoclar Dental Products.

Dr. Nosti was selected as a “Top Dentist in New Jersey” by his peers and in the New Jersey Monthly magazine in 2011, 2012, 2013, and 2014. In addition, examples of Dr. Nosti’s cosmetic dentistry are used by the American Dental Association in the association’s pamphlets, booklets, and websites for use by dentists all over the world, to show patients what is possible with veneers and crowns (cosmetic dentistry). Dr. Nosti is among the few dentists in Manhattan who hold Fellowships in the Academy of Comprehensive Esthetics (Cosmetic Dentistry), the Academy of General Dentistry (FAGD), and the International Congress of Oral Implantologists (FICOI).

Phong Ta, DDS

Board Certified Dentist Anesthesiologist

Dr. Phong Ta specializes in delivering anesthesia for dentistry and is a Board Certified Dentist Anesthesiologist with extensive anesthesia training from Mount Sinai Hospital in New York City. While at that institution he was trained to provide the full spectrum of anesthesia from mild sedation to complete general anesthesia for a wide range of procedures and patients. As part of his training Dr. Ta maintains active certification in Basic Cardiac Life Support (BCLS), Advanced Cardiac Life Support (ACLS), and Pediatric Advanced Life support (PALS).

During his career he has worked with dentists throughout the New York Metropolitan area and has treated thousands of patients, both pediatric and adult, in the dental office setting. Mobile dental anesthesia is a unique combination of medicine and dentistry that Dr. Ta has honed his skills in over the years, and he is proud to be a specialist who can offer these services for patients in and around the New York City area.

Prior to his time at Mount Sinai Hospital, he competed a general practice residency at the Veterans Affairs Palo Alto Healthcare System in California in association with Stanford University. As a magna cum laude graduate of the University of Maryland’s Baltimore College of Dental Surgery, Dr. Ta was in the top 10% of his class and was awarded his Doctor of Dental Surgery degree with distinctions from multiple departments.

 As a member of the medical and dental community, Dr. Ta maintains membership in the following organizations:

  • American Society of Dentist Anesthesiologists
  • American Dental Association
  • New York State Dental Association
  • New York County Dental Society
  • American Society of Anesthesiologists
  • Omicron Kappa Upsilon Dental Honor Society

Outside the world of medicine and dentistry Dr. Ta is an avid musician and plays the violin with several orchestras throughout the city.

Mahdiyeh Shahpasandzadeh, DDS

General Dentist

Dr. Mahdiyeh Shahpasandzadeh “Dr. Maddie” graduated from Kerman university of Medical Sciences in 2008. Dr. Maddie was consistently a top dental student and was ranked first place by the dental faculty for outstanding dedication to academics, patient care, and research. She was also awarded a first-place prize for the research presentation at the annual congress of dental students.

Dr. Maddie completed her advanced program at Columbia University in New York and received training in Aesthetics, Implantology, Endodontics, Prosthodontics and being laser and invisalign Certified. She then pursued a General Practice Residency training at the New York Presbyterian Hospital, where she worked on patients with very complex medical histories, developmental disabilities, and geriatric medical complications. She Provided care during rounds and on-calls with same responsibilities as that of a first-year Oral and Maxillofacial Surgery resident at NYP.

Dr. Maddie is Enthusiastic, career-oriented and talented dental professional with knowledge of dental care processes and procedures, proven ability to ensure that first rate care is provided to patients and families. Her smile makeovers are the forefront of Cosmetic dentistry, and she is committed to improving her patients’ smiles by utilizing the highest standards of modern Esthetic Dentistry.

She enjoys cooking, playing piano, travelling, and most importantly being with her husband Soorena and her family and friends. She speaks English, Farsi.

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