Committed to Your Dental Wellness

The right dental care goes beyond basic treatments — it’s about finding a team that genuinely cares about your smile and overall well-being. At Advanced Dentistry of O’Fallon in O’Fallon, MO, we’re committed to creating personalized dental experiences tailored to your unique needs. When you join our patient family, you can expect comprehensive solutions for nearly every oral health concern, calming sedation options to ease dental anxiety, and cozy touches like weighted blankets and headphones to help you feel at home.

We proudly offer family-friendly care, including treatments for young children, and we welcome new patients with special offers — including $1 smile consultations and $79 exams* with cleanings. Call us at 636-689-1803 to schedule your appointment and take the first step toward a healthier, more confident smile.

Meet Dr. Cusumano

Dr. Cusumano’s mission as a dental practitioner is to provide comprehensive, forthright, and empathetic care of the highest caliber to all the patient that walk through the door.  He believes in a conservative approach to all procedures, keeping the best interests of each patient in mind.  As the dental industry continues to change, he vows to make a conscientious effort to consistently improve his knowledge and skillset through continuing education opportunities.

Dr. Cusumano is currently an active member of the American Dental Association, the Missouri Dental Association, and the Greater St. Louis Dental Society.  Dr. Cusumano is also an active member in the Academy of General Dentistry and the Academy of Facial Esthetics.

Finally, Dr. Cusumano holds an active membership in the Arch Study Club, the St. Louis Chapter of the Seattle Study Club.  This study club focuses on bringing general dentists and the various dental specialties together monthly to sharpen their necessary interdisciplinary skills and get exposed to the newest, cutting-edge dental technology.

Dr. Kourosh Nakhaei

Dr. Kourosh Nakhaei, affectionately known as “Dr. Nik,” is a highly skilled and passionate dentist who has dedicated his life to the field of dentistry. From a young age, his love for fine arts and engineering, coupled with his unwavering attention to detail, guided him toward a career in health care.

After graduating with honors from the prestigious UCLA School of Dentistry in 2017, Dr. Nik practiced in Houston, TX. Now settled in St Louis, he has consistently delivered exceptional care to his patients. Driven by a thirst for knowledge and a commitment to excellence, he dedicates countless hours to continuing education. This ensures that he stays abreast of the latest advancements in the field.

Dr. Nik’s primary focus is providing his patients with the best dental experience possible. He incorporates painless techniques and best practices, guaranteeing a comfortable and stress-free visit. Patients admire his gentle touch and appreciate the meticulous attention to detail he brings to every procedure.

With an unwavering commitment to delivering high-quality, pain-free dental care, Dr. Nik strives to exceed his patients’ expectations. He believes in building strong relationships with his patients, taking the time to listen to their concerns and providing personalized treatment plans tailored to their individual needs.

Meet our team

Stacey B.
Practice Manager/Registered Dental Hygienist
Ollie T.
Expanded Functions Dental Assistant
Tara H.
Patient Advocate/Treatment Coordinator
Lauren W.
Assistant Manager/Expanded Functions Dental Assistant
Emily L.
Patient Advocate/Insurance Coordinator
Marcia F.
Registered Dental Hygienist
Jenn S.
Registered Dental Hygienist
Learn more about our team
Call Today
636-978-7816
2990 State Hwy K
O'Fallon, MO 63368
We’re welcoming new patients and can’t wait to meet you.
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Drew

I am so proud to be part of such an amazing dental team and enjoy coming to work everyday!  Our patients mean the world to me and I enjoy getting to know each and every one of them and seeing their amazing smiles!

Gina

I have been a part of many dental teams through the years – none compare to our team at Advanced Dentistry.  I feel blessed to be a part of this work family who all share the same passion for dentistry.  Our mission is to provide our patients with the best dental experience possible.  What I love most about my position is the relationship I get to form with my patients. I am always eager to meet new patients and welcome them to our growing practice.