About Us

All our professionals at Euclid Dental Center maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.


Amy Zonoozi, D.D.S.

Dr. Amy Zonoozi has been practicing dentistry for the past 27 years and has been serving the Ontario community for over 10 years.  Dr. Amy has experience in all aspects of general dentistry. She continuously keeps herself updated on the latest products and technology by attending seminars and reading the latest publications. She has completed several hours of continuing education courses in cosmetic dentistry, full mouth rehabilitation, laser dentistry, endodontics, and periodontics. Dr. Amy loves dentistry because of her great patients and great staff. She spends extra time to fully understand the need of her patients and is involved in every step of the treatment plan. Dr. Amy wants every patient to have a pain-free and happy experience at Euclid Dental Center.  


Dr. Niki Katoozi

Dr. Niki Katoozi is born and raised in Southern California. She got her bachelors degree in Biology from University of California, Irvine and obtained her Doctorate in Dental Surgery from the University of Southern California. Fight On! After graduating from dental school, Dr. Niki completed a one year General Practice Residency at Lutheran Medical Center in New York. After her residency, she moved back to sunny California and joined her mother's practice. Dr. Niki has a heart for underserved populations and has been on many dental mission trips to Mexico and South America. 

Dr. Niki believes that every patient should be treated like family. She loves to get to know her patients and provide them quality dentistry in a fun and relaxed environment. When she is not practicing dentistry, she enjoys working out, hiking, skiing, and spending time with family and friends.


Office Manager

Vanessa is the first person you will see when you visit our office. She is fluent in Spanish, born and raised in Ontario, CA and has been in the dental field for over 10 years. Vanessa is organized, reliable and responsible. She has great knowledge of all aspects of dentistry and makes a great asset to our team. Her passion is to focus on the business aspect of our practice, website development, marketing, and bookkeeping. She keeps up to date with the latest procedure codes, and all dental insurance plans to help answer all financial questions and save our patients time and money. Vanessa loves what she does, meeting new patients, and building great rapports with them so they become lifelong patients.



Dental Assistant

Cristina has been a dental assistant for over two years. She graduated from American Career College and is in the process of getting her RDA degree. She is fluent in Spanish, and is a native of Chino, CA and has been raised here her whole life. She is very good at making patients comfortable and has a great eye for esthetics. Cristina is proud to be a part of a practice that provides excellent dentistry and beautiful smiles. She enjoys getting to know our patients and understanding what will make each individual experience the best it can be. In her spare time she enjoys spending time outdoors with family and friends.