Arrowhead specialists


Otis Chong, D.M.D., MMSc

Dr Otis ChongDr. Chong is one of a few dual Ivy League Trained Endodontists in the state of California. He attended the University of Pennsylvania for his dental studies where he earned his DMD with Honors. Dr. Chong earned his Master’s in Medical Science and certificate in Endodontics at the prestigious Harvard University.

Dr. Chong holds a faculty position at the University of California, Los Angeles where he provides clinical based instruction on root canal therapy and lectures extensively to dental students.

Dr. Chong strives to provide cutting edge dental care in a comfortable and relaxed atmosphere. He currently resides in Orange County with his wife who is also a dentist and their two dogs.


Oral Surgery

Samuel Tchon, D.D.S., M.D.

Dr. Samuel Tchon is a graduate of UCLA Dental School and completed his surgery residency at New York Presbyterian Hospital/Weill Cornell Medical College. His professional training includes an M.D. from Cornell University and an internship year in general surgery. Dr. Tchon’s expertise combines the disciplines of dentistry, medicine and surgery. He brings a depth of experience and is competitively qualified to perform the most complex surgeries and resolve complications when needed.

Born and raised in Los Angeles, Dr. Tchon also spent six years training and working in New York City before returning to his roots in the best coast. He is a lifelong Bruin, starting with his bachelor’s degree in microbiology, immunology, and molecular genetics from UCLA to his D.D.S. degree.

Dr. Tchon has a vision of bringing Inland Empire residents the best in dental implant technology and oral and maxillofacial surgery. He seeks to enhance patient comfort across the full spectrum of surgical procedures of the mouth, face and jaws.

With a special interest in improving oral disease prevention and treatment, Dr. Tchon has conducted extensive research in tissue engineering, working closely with internationally renowned dental implant experts.

When Dr. Tchon is not working in the office, he volunteers his services to the community and church; he has been on a number of dental mission trips internationally. He enjoys traveling, watching ESPN and spending time with his family.

Luiza Portnoff, D.D.S.


Juliana Carvalho, D.D.S.

Dr. Carvalho received her dental degree from the University of Pittsburgh School of Dental Medicine. While in school she developed great interest in periodontics and its treatment varieties. She participated in implant courses from the MISCH Implant Institute.

After Or. Carvalho received her dental degree she started her periodontal and implant training at Loma Linda University. She obtained her Masters by researching the effects of local drugs in periodontal treatment. Her research was published in 2006 and she went on to work as an assistant professor while practicing at the same time at the Faculty Dental Offices. Other research participations were in the wound healing and immunology field.

Dr. Carvalho is a member of the American Academy of Periodontology, The American Academy of Implant Dentistry and The International College of Oral Implantology.  Dr. Carvalho has been placing implants since 2004.

Dr. Carvalho’s other interests include traveling and spending time with her three children.