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Meet Our Specialists

Dr. Michelle Lee
Dr. Lee graduated from Loma Linda University School of Dentistry in 2001 and began practicing general dentistry full time. As an assistant professor she taught restorative dentistry at Loma Linda University School of Dentistry.

In 2003, she moved to New York and while practicing general dentistry full time was also a General Practice Resident Attending in Jacobi Hospital, New York.

Wishing to pursue her interest in pulpal diseases and their treatment, Dr. Lee was accepted to an endodontic residency program at the University of Medicine and Dentistry of New Jersey finishing among the top of her class. Since her graduation she has published her research in the Journal of Endodontics, a prestigious healthcare journal.

Dr. Lee is a board eligible endodontist, American Dental Association and California Dental Association. She is teaching again at Loma Linda University Department of Endodontics as an Assistant Professor.

Dr. Lee and her husband, a pediatric dentist, have been married for over 10 years with two children.

Dr. Rabin Marfatia
Dr. Rabin Marfatia is our Pediatric Dentist, specializing in the dental care of infants to teens. Dr. Marfatia completed his undergraduate studies Molecular and Cell Biology from the University of California Berkeley followed by his doctorate degree in dentistry from the University of Southern California, School Of Dentistry in 2001.

Inspired to help young children, Dr. Marfatia went on to further his training by completing a residency in Pediatric Dentistry from the Columbia University/New York Presbyterian Hospital; one of the top Children’s Hospitals in the country.

Dr. Marfatia is board certified Pediatric Dentist, member of the California Society of Pediatric Dentists, American Academy of Pediatric Dentist, and American Board of Pediatric Dentist.

Dr. Marfatia’s goal is to provide dental care for toddlers to adolescents and make their experience at our dental office as comforting, educational, and fun as possible. He has extensive experience in behavior management, oral sedation, and IV sedation to help provide a positive experience for your child.

Dr. James Chen
Dr. James Chen graduated in 1997 and specializes in endodontics. He enjoys fishing and traveling. Dr. Chen is married and has two sons. His goal is to practice dentistry at a satisfying level. He is set apart from other dentists because he works at the microscopic level of dentistry.
Dr. George Guise
Dr. Guise earned his Bachelor’s degree in Biology from Kansas State University in 1991. From there, he attended Tufts School of Dental Medicine, Boston, MA where he earned his Doctor of Dental Medicine degree in 1995. After 11 years as a General Dentist, Dr. Guise sought specialty training in Endodontics. His Endodontics certificate and Master’s degree were received from the Bureau of Medicine and Surgery and George Washington University, respectively. He is a published author in the Journal of Endodontics. Dr. Guise is married with 3 sons.
Dr. Frank Burrell
Dr. Frank Burrell was born and raised in northern California. He attended local schools there and graduated from U. C. Davis with a B.S. in Biological Sciences in 1971. He graduated from the UCLA School of Dentistry in 1975 and practiced general dentistry for 3 years in northern California. In 1978 he moved back to southern California and restricted his practice to Orthodontics. He was and associate doctor in a large orthodontic practice for 7 years and then a partner in the same practice for 7 more years.
Dr. Brandon Nguyen
Dentistry has always intrigued me. Because the mouth enables people to eat, drink, and communicate, it is a profession that can make a major impact on someone’s life. Aside from being involved in various local volunteer and charity events, I feel like dentistry is another way I can give back to the community by caring for my patients individually. Because my caring orthodontist was so patient with me during the course of my treatment, I wanted to emulate him and provide that same level of care to any patient that walked in my door.
I have lived all over United States, including Texas, New Jersey, Maryland, Virginia, North Carolina, Pennsylvania, Massachusetts, and Northern California, but the place I have enjoyed the most is Southern California. I love the diversity and energy of this area. That is why I am proud to call Irvine home and am pleased to offer specialized care in child and adult orthodontics, dentofacial orthopedics, Invisalign, Invisalign Teen, and lingual orthodontics.


After graduating with honors from the University of Pennsylvania School of Dental Medicine, I completed my orthodontic residency at Tufts University. After graduating with honors from the University of Pennsylvania School of Dental Medicine, I completed my orthodontic residency at Tufts University. It is a privilege and an honor to be entrusted with providing every patient the highest level of care. Completing hospital externships at Children’s Hospital of Philadelphia (CHOP) and Guy’s Hospital in London, England, has taught me to be a compassionate, devoted, and patient-oriented professional. Teaching and tutoring students for over 6 years has enabled me to communicate effectively with patients.

I have jumped out of an airplane, climbed Machu Picchu, and dove in the Great Barrier Reef, but the thing I enjoy most is laughing with my patients. I am truly honored to be in this great profession that enables me to still be young with my patients and continuously learn something new each day from them. That’s why I am a firm believer that you never should stop learning. I live life with passion, and orthodontics is a passion of mine. When I am not practicing and attending dental society meetings/CE courses, I enjoy participating in community events, traveling, exercising, hiking, playing basketball, scuba/abalone diving, and surfing. I look forward to giving you something to smile about!

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Oral Surgeon
Dr. Apel Keuroghlian
Dr. Apel Keuroghlian is an Oral and Maxillofacial Surgeon who graduated from UCLA. His career began with a biomedical/biochemical engineering degree from the University of Southern California, where he graduated among the top of his class. Throughout his undergraduate education in engineering, Dr. Keuroghlian researched the effects of the different surface characteristics of implants and their integration with bone. He later decided to further his education by obtaining a dental degree from USC. While at the USC School of Dentistry, Dr. Keuroghlian received several endowed scholarships for academics/research including the California Dental Association research scholarship and academic scholarship as well as the Class of 1964 endowed scholarship. He once again graduated amongst the top of his class. Dr. Keuroghlian truly enjoyed the surgical aspect of dentistry while in dental school and decided to further his education in Oral and Maxillofacial Surgery at UCLA which includes a Medical Degree from UCLA as well as a internship certificate in general surgery. He currently holds a faculty position at UCLA as well. Dr. Keuroghlian truly enjoys what he does and is committed to enhancing patient care by integrating his engineering, dental and surgical skills and education. He hopes to pursue research in the future, but is dedicated to patient care as his first priority. Dr. Keuroghlian is fluent in both English and Armenian. When not working, Dr. Keuroghlian enjoys travelling, skiing, playing basketball or just hanging out with his friends.