Why Choose Us?


Rene Tanquilut, DDS

Dr. Tanquilut was born in Chicago and raised in the southwest suburb of Orland Park. He earned both his bachelor’s degree and his Doctorate of Dental Surgery at the University of Illinois. As a graduate student, he completed an externship in oral surgery.

After dental school, Dr. Tanquilut completed a General Practice Residency Program (GPR) at Cook County Hospital in Chicago. He rotated through various different departments during his residency, including Internal Medicine, Anesthesiology and Oral and Maxillofacial Surgery.

Over the last 20 years, Dr. Tanquilut has taken almost three times the annual continuing education hours required by the state. As a result of his training, continuing education and years of experience, he has been awarded Fellowship status in the Academy of General Dentistry and International Congress of Oral Implantologists.

Stephanie Nguyen-Janes, DMD

Dr. Stephanie A. Nguyen Janes is originally from Metro Detroit and received a Bachelor of Science degree in biology with a minor in psychology from the University of Michigan. Upon graduation, she moved to Bradenton, Florida, to study dentistry as part of the inaugural class at the Lake Erie College of Osteopathic Medicine School of Dental Medicine, earning her Doctor of Medicine in Dentistry degree. While at LECOM, she was a dual-enrolled student and also earned a master’s degree in health service administration. On behalf of the International College of Dentists, she received the Humanitarian Award.

After graduating from dental school, Dr. Stephanie moved to Chicago and completed a general practice residency through the NorthShore University HealthSystem – Evanston Hospital. She gained hospital dentistry experience with a focus on medically compromised patients and emergency dentistry. Through the residency program, she was able to enhance her comprehensive dental skills, especially in endodontics and cosmetic dentistry.

In her spare time, Dr. Stephanie enjoys rooting for the Michigan Wolverine football team. Go Blue! She is passionate about volunteering with underserved communities and expresses her creativity through scrapbooking and other Cricut craft projects. She and her husband recently welcomed their first daughter to the world. Together, they love trying different restaurants in the Tri-City area, going to the theater for plays and musicals, and traveling to new destinations.

Meet Our Team
Here at Randallwood Dental, we are dedicated to helping you achieve your ideal smile. We have a highly experienced team that focuses on each individual patient to ensure they receive the care they need and is happy to communicate with our patients in both Spanish and English. Our team values the long-term relationships we build with our patients, and we make certain our patients feel satisfied with their care! To learn more about our dental services in St. Charles, Illinois, we invite you to contact our office at 630-377-0034 today and schedule an appointment with our dentists, Dr. Rene Tanquilut or Dr. Stephanie Nguyen-Janes.

Brianna Garcia

Lead Dental Assistant

Hello, everyone! I’m Brianna Garcia. I graduated from Kishwaukee College’s 2021 Dental Assistant Program. I grew up in Genoa and Sycamore most of my life and never really thought of being a dental assistant until I was given an opportunity to join a dental assisting program. I was instantly fascinated with the dental field and have never looked back. I continually take continuing education classes to increase my dental education and skill set, and in less than one year of working at Randallwood Dental, I have been promoted to lead dental assistant. My goal is to make your visits as comfortable and enjoyable as possible, ensuring our patients achieve optimum oral health and a beautiful smile! Outside of the office, I enjoy spending time with my boyfriend and family, hiking, taking long car rides, and trying new restaurants!

Mary Kay Koehler

Registered Dental Hygienist

Check back soon to meet Mary Kay Koehler!

Nikki W.

Patient/Finance Coordinator

Check back soon to meet Nikki!

Raquel R.

Registered Dental Hygienist

Hello, my name is Raquel. I have been married for 16 years to such an intelligent man and have 2 kids, my greatest achievement. They keep me on my toes. I can always count on my family for support. I enjoy spending time with my family and friends, traveling and always learning something new. I believe that a curious mind craves knowledge.

I have been a dental hygienist for 19 years. I enjoy what I do. There are so many different reasons why. I enjoy educating the patients, providing individualized care and forming lasting relationships with patients. I am humbled that they put their trust in me to provide them with compassionate care.

Tanner B.

Registered Dental Hygienist

Hi, I’m Tanner. I grew up in a small town near Macomb, IL. I received my degree in dental hygiene from Carl Sandburg College. I strive to ensure our patients feel comfortable and informed during their visit. Outside of the office, I enjoy spending time with my wife and our two black kittens, and in my free time, I also enjoy hiking.