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.

We understand that dental pain may arise at the worst possible time. At Smile Studio, we perform same day emergency services to get you out of pain, including: dental fillings/bonding, crowns, bridges, extractions, and implants. As a local and trusted dentist, we strive to create lifelong relationships with our patients and their families to ensure that you can remain comfortable in a relaxing environment. We invite you to schedule an appointment by calling (909) 981-6400 to experience for yourself why our patients believe Smile Studio is the best dentist in Upland.


Dr. Phil J. Ra was raised in Southern California and currently takes pride in residing and practicing the art and science of dentistry in Upland and the surrounding areas. His childhood goal of becoming a dentist became a reality when he was accepted into the prestigious six-year Accelerated Dental Acceptance Program Tract (ADAPT) at the University of Southern California School of Dentistry right out of high school in 1994. Dr. Ra is proud of this accomplishment, as only a select group of students in the nation are accepted into this academically rigorous and clinically grueling accelerated program.
After becoming one of the youngest doctors to graduate with a Doctor of Dental Surgery degree in the history of USC in 2000, Dr. Ra spent several years (and still spends many hours) attaining up-to-date continuing dental education and training to better serve the Inland Empire for over 15 years. . His unwavering commitment to staying on top of dentistry’s latest techniques and research has earned him the highly prestigious Fellowship from the Academy of General Dentistry. This means he has the skills gained from more post-doctorate education in 3 years than the State of California requires dentists to take in 20 years of practice.
Picture of Dr. Phil J. Ra
In 2007, Dr. Ra received the “Top Dentists in America” award, given annually by the Consumer Research Council to selected dental healthcare professionals. Starting in 2008, Dr. Ra was extremely honored to be voted as one of the “FAVORITE DENTIST OF THE INLAND EMPIRE” by the Inland Empire Magazine for 7 years straight.
Currently, Dr. Phil J. Ra is a member of the ADA, AGD, IAOMT, and the ICOI and has a FELLOWSHIP in the Academy of General Dentistry (AGD) and FELLOWSHIP in the International Congress of Oral Implantology (ICOI) and also an Associate Fellow from the World Clinical Laser Institute (WCLI). Dr. Ra is one of the very select few in the Inland Empire to be certified in the LANAP (Laser Assisted New Attachment Protocol) and was one of the first doctors to be trained in the pinhole gum rejuvenation procedure. He is also actively involved in organized dentistry, previously serving as a board member in the Southern California Academy of General Dentistry. Dr. Ra was a regular contributor to dental health articles for the Inland Empire Family Magazine and is also a manuscript peer-reviewer for the General Dentistry magazine, which is the leading peer reviewed publication for the general dentist. He is also involved in numerous study clubs in order to maintain the latest knowledge in cutting edge dentistry.
Dr. Ra practices Biologic Dentistry and maximizes the power of cavity re-mineralization, alkalization of the mouth, and other homeopathic and minimally invasive techniques to help every patient be as healthy as possible.
In our Upland dental office, patients have the opportunity to complete dental material compatibility testing. This test will inform your dentist of any reactivity within your body to specific dental materials. Dr. Ra only uses the most biocompatible materials.
Our office uses the latest in digital dental radiographs, digital 3D radiographs (CBCT), digital photography, and polarized infrared light (diagnocam technology) to offer the safest and most accurate diagnosis. We also employ CEREC (CAD/CAM Technology) which allows us to perform same day permanent conservative biocompatible restorations. This is convenient for our many patients who travel in from out of the area for treatment.
The 3D (CBCT) is a wonderful technology employed to evaluate root-canalled teeth for cracks and chronic infections that potentially leak pathogenic bacteria into your body. When needed, this technology is used to perform simple guided flap-less implant surgery. This is the least traumatic and least painful implant procedure.
Another great advantage to Dr. Phil Ra’s SmileStudio is his “in-house” dental laboratory. When aesthetic services are needed or desired, no work is out-sourced from the office. Our in house lab allows perfect communication of patients’ desired outcomes to the ceramist fabricating the crown or veneer. We perform custom smile design, custom shade matching, and in house quality control using the highest quality ceramics in existence. Whether it is one tooth in the front of the mouth or your entire smile, our in-house laboratory ensures your aesthetic desires are met and exceeded.
Dr. Michael Azer Picture

Michael Azer, DMD

Dr. Michael Azer was born and raised in Los Angeles, CA. He received his Bachelors of Science in Public Health from the University of California, Irvine. He then completed his dental education at Western University of Health Science, where he earned his Doctor of Dental Medicine (DMD) Degree.

Dr. Azer is passionate about delivering beautiful smiles and improving overall oral health. He truly loves getting to know his patients and encourages them to have a say in their care and treatment. His goal is always to educate and engage his patients, while also making them feel comfortable and at ease in the dental chair.

Since graduating, Dr. Azer has taken countless hours of continuing education in cosmetic and implant dentistry. He strives to offer the most up to date and technologically advanced treatment in a gentle, caring manner, all while establishing lasting relationships with his patients.

In his free time, Dr. Azer enjoys spending time with his family and friends. He also loves playing basketball, weightlifting, and eating at trendy restaurants. He is happily married to his wonderful 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.
Dr. Christopher Yoo Picture
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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