About Smile Studio

Smile Studio is a Upland based OWNER OCCUPIED, family dentist practice that treats patients of all ages. We are committed to delivering the highest quality dental care and do so using advanced dental equipment. We are one of the few PRIVATE offices in the country that employ Specialists on STAFF where the patients are able to see the BOTH the general dentist and the specialists in one roof. We are a cosmetic dentist that offers services like checkups, teeth cleaning, crowns, veneers and more. We also are one of the few Dental offices in the country to have both an inhouse dental ceramic lab technician and denture lab technician in house.



Dr. Phil J. Ra, raised in Southern California, realized his childhood dream of becoming a dentist when he was accepted into the prestigious six-year Accelerated Dental Acceptance Program Tract (ADAPT) at USC right after high school. Graduating in 2000 as one of USC’s youngest DDS holders, he has since dedicated himself to continuous education, earning a Fellowship from the Academy of General Dentistry, showcasing his commitment to staying abreast of the latest dental techniques. Notably, he’s been recognized as one of the “Top Dentists in America” and voted “FAVORITE DENTIST OF THE INLAND EMPIRE” for seven consecutive years.

Dr. Ra is extensively involved in professional organizations like the ADA, AGD, IAOMT, and ICOI, holding fellowships in AGD and ICOI, among other certifications. Actively engaged in advancing dental knowledge, he’s served on boards, contributed to dental health articles, and participated in study clubs. His practice emphasizes Biologic Dentistry, utilizing minimally invasive and homeopathic approaches to promote overall health, including cavity re-mineralization and biocompatible materials.

In his Upland dental office, Dr. Ra employs cutting-edge technologies like digital radiography, 3D imaging, and CEREC for same-day restorations, ensuring accurate diagnoses and convenient treatments for patients. His use of CBCT technology allows for precise evaluations and guided implant surgeries with minimal discomfort. Additionally, his in-house dental laboratory ensures meticulous customization and quality control for aesthetic procedures, guaranteeing patients’ satisfaction with their smiles.

Picture of Dr. Phil J. Ra
Dr. Michael Azer Picture

Michael Azer, DMD

Dr. Michael Azer, a Los Angeles native, earned his Bachelor of Science in Public Health from UC Irvine before obtaining his Doctor of Dental Medicine (DMD) Degree from Western University of Health Sciences. He is dedicated to crafting beautiful smiles and enhancing oral health, prioritizing patient involvement and comfort throughout treatment.

Continuously advancing his skills, Dr. Azer pursues ongoing education in cosmetic and implant dentistry to provide cutting-edge, gentle care to his patients. Beyond dentistry, he enjoys family time, basketball, weightlifting, and exploring trendy restaurants with his wife, Lydia.

Chris Yoo, DMD

Dr. Christopher Yoo was born and raised in Southern California. He received his Bachelor Degree in Economics from the University of California, Irvine. He then moved to Boston, MA where he received his Doctor of Dental Medicine degree from Tufts University School of Dental Medicine. After graduating, Dr. Yoo has moved back to Southern California where he is now practicing dentistry full time.
In his spare time, Dr. Yoo enjoys playing a variety of sports (basketball and tennis, mostly), watching movies, and exploring new places to eat.
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Dr. Roy Yoo Picture

Roy Yoo, DMD

Dr. Roy Yoo spent most of his childhood years in the South Bay area before he moved to the Bay area to attend college. He graduated from UC Berkeley with a major in Molecular & Cell Biology. After graduating from UC Berkeley, Dr. Yoo moved to Boston where he attended the Harvard School of Dental Medicine.
Dr. Yoo received his Doctor of Dental Medicine degree from Harvard in 2004. After finishing dental school, Dr. Yoo moved back to Southern California and continued his specialty training in periodontics at the USC School of Dentistry. During his training, Dr. Yoo has done extensive research and has published articles in The International Journal of Oral & Maxillofacial Implants and The Journal of the Western Society of Periodontology.
As a Board Eligible Periodontist, Dr. Yoo limits his clinical practice to periodontics & implant dentistry. He is qualified in all areas of periodontics and has extensive clinical experience with most major implant systems. Dr. Yoo is dedicated to serving his community with the highest quality of care and stays updated with the latest developments in his specialty. Dr. Yoo continues to be actively involved in his community. He remains affiliated with the USC Advanced Periodontics Department as a part-time faculty member and his professional affiliations include memberships to the American Academy of Periodontology, Academy of Osseointegration, California Society of Periodontists, Western Society of Periodontology, South Coast Periodontal Group, Interdisciplinary Dentofacial Institute, California Dental Association, and the American Dental Association. He currently works in our office once a month.
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