Our Team

Dr. Zak Downey Dental Care is proud to serve the Downey community

Dr. Zak Downey Dental Care is an office where patients can expect affordable, gentle, and long-lasting dental care. The dental team at this office is extremely experienced and knowledgeable, and are trained to make every one of your visits quick and painless. It is our motto that for dental care to be great, it must include patient education and preventative care; these aspects of your dental treatment are essential to maintaining excellent oral health for life. 


Meet Our Dental Staff

The expert team of dentists and administrative staff at this office are committed to helping you attain the smile you’ve been dreaming of for years but never thought you could achieve. The personalized and effective care we provide is long-lasting and will be extremely beneficial to your long-term dental health. Every member of our staff is trained to handle every possible dental problem as well as dental office operation, and is committed to making your visits inexpensive and convenient. We use modern, efficient equipment and we pledge to use it with energy and care.

Dr_Ilya_ZakDr. Ilya Zak, DDS

Dr. Ilya Zak attended USC Dental School for a six-year long undergraduate and graduate program titled ADAPT; he received his degree in 1990. He then became a resident at White Memorial Hospital, specializing in TMJ/Pain Management, and because of this specialization, he is a qualified medical examiner for TMJ dysfunction. He also was a part-time professor at his alma mater, USC Dental School, and has been practicing in Simi Valley, Valencia, Agoura Hills, Downey, and Long Beach since 1994. Dr. Zak takes great care in ensuring that patient care at Zak Dental is patient centric and enhances the wellness of our patients.


Dr. Shirashi, DDS, Our TeamDr. Ronald Shiraishi, DDS

Born and raised in California, Dr. Shiraishi attended UCLA for his undergraduate degree and Washington University for his dental degree. He has been working in the Downey office for over 25 years, and is proud to have treated generations of patients. Dr. Shiraishi has 29 years of experience under his belt, and has a commitment to improving his patients’ health.  He enjoys being outdoors and fishing.

Dr. Roshi, DDS dentist our teamDr. Roshi, DDS

Dr. Roshanak Momen (Roshi) graduated in 2016 from Loma Linda University, School of Dentistry. She received an award for being a Teacher’s Assistant in Restorative Dentistry. She has her DDS degree from Azad University in 2009 as well. Dr. Roshi wanted to be a dentist from her childhood. She is committed to improving his patients’ health. Dr. Roshi speaks English and Farsi.

Dr. Nadia Abazarnia, dentist our teamDr. Nadia Abazarnia, DDS

Dr. Nadia graduated from Carlo Davila University of Bucharest in 1993.  Dr. Nadia has been practicing in California for over 14 years and is a recognized expert in dental implant restorations. Dr. Abazarnia is fluent in English, Farsi, and Romanian.  Dr. Nadia is an avid believer in the philosophy that dental treatment must enhance patients’ overall wellness and she practices this philosophy through her treatment of patients.