At American Dental Excellence, we’re all about teeth. Well, not just any teeth – your teeth. And your gums. And your overall oral health. In fact, we’re pretty much nerds when it comes to dental healthcare and we’re pretty darned proud of that. We believe that it is this passion for dentistry, in all of its forms, that drives us to maintain our high levels of customer care and procedural excellence in all that we do. Led by Dr. John Montoya, our staff has exemplified expertise in dentistry, delivering a level of patient care that is rarely seen in the industry. We’re just dedicated to delivering compassionate, caring, exemplary service. And it shows.


Dr. Montoya – Dentist

Driven by the belief that health care decisions should be left in the hands of the patients themselves, Dr. John Montoya provides exemplary, patient-focused dental care for all of Westminster and its surrounding areas. As a biology graduate of the University of San Diego, afterwards receiving his doctorate degree from Creighton University, he brings his extensive education and experience to his own dental clinic in Westminster.

After hours, Dr. Montoya is dedicated to both his family and his community. Spending hundreds of hours volunteering for a variety of non-profit organizations, he has committed his free time to help out in a variety of ways, from fundraising for breast cancer research to donating his services to ensure high-quality dental care to those in need.


Dr. Toth – Dentist

As a native of Ohio, Dr. Brian Toth completed his undergraduate studies at the University of Cincinnati.  He graduated in 1991 with a Bachelor of Science degree in Molecular Biology.

Upon graduation Dr. Toth accepted a position as a research assistant in an infectious disease lab, publishing articles on his research.  In 1996 Dr. Toth graduated from the Ohio State University College of Dentistry.  While at OSU, Dr. Toth participated in Implant research where he presented and published his findings along with his research director.  After receiving his degree he joined the faculty at the Dental School and was a clinical instructor for two years.  Pursuing his goal of ownership, Dr. Toth relocated to Cleveland where he owned a private practice.  Dr. Toth’s philosophy encompasses a comprehensive approach in helping patients understand the benefits of choosing quality dentistry.

In 2013 Dr. Toth relocated to Colorado where he enjoys skiing, golfing, and running.  Above all he enjoys time spent with his wife Marije and three daughters, Anne-Faye, Maya, and Luna


Gina Welihan – Office Manager

Gina Welihan has worked in administrative front office roles since 2006. She loves the opportunity to work with patients on reaching their dental health goals. Gina is a Colorado Native and, in her spare time, she loves participating in rock crawling and off-road events with her husband and daughter.



Linda – Hygienist

Linda graduated as a Registered Dental Hygienist from The Community College of Denver in 2015. She has also worked as a dental assistant and has gained a well rounded knowledge of the dental field.  Linda enjoys educating her patients about the benefits of preventative care. In her free time, Linda enjoys backpacking, rock-climbing, snowboarding and reading.


Margaret – Dental Assistant

Margaret has enjoyed being in the dental field for over ten years. She and her husband have a blended family with four children total. Outside of the office, Margaret enjoys camping, traveling, and simply being together with her family. Margaret’s hobbies include scrap booking and crafts, photography, and genealogy.