Performance Dental Center

Meet the Team at Performance Dental Center

Welcome to Performance Dental Center! You’ll find high quality dental care and advanced services offered in a relaxed and laid back atmosphere. Our office is modern and equipped with the latest in dental technology to make treatment more comfortable, efficient, and pleasant for our patients.

Performance Dental Center prides itself on providing general and sports dental services to families and athletes in and around Boulder. We believe dental health is essential to successful physical and mental performance. Whether you are an elite athlete or on your own path to wellness, we will help you understand how optimum oral health can enhance a strong and healthy body.

We take pride in our work and promise to continue pushing the mold of sports dentistry as the dental provider of choice for Boulder's athletes and the athlete in you.

Jameson Ribbens, DDS, DDS

Associate Dentist

Dr. Ribbens is originally from Green Bay, Wisconsin, and after dental school in Minneapolis set his sights on practicing along the beautiful Colorado front range. He completed his undergraduate degree in nutrition at the University of Minnesota before being accepted into their dental program. He began practicing dentistry in 2017 in Arvada, Colorado, and found us at Performance Dental Center in January of 2020. Dr. Ribbens is a member of the American Dental Association, the Colorado Dental Association, and the Boulder Broomfield County Dental Society. His favorite thing about practicing in Boulder is meeting all of the amazing patients while helping them achieve their best oral health. He currently resides in Longmont, Colorado with his wife Deidre and their dog Ozwald. When not in the office, Dr. Ribbens enjoys cycling, skiing, Italian wine, playing guitar, traveling, and all kinds of cheese. 

Nicholas Sigman, DMD

Dr. Sigman has always wanted to live in Boulder, CO, so starting his own practice here has allowed him to live the dream!

After receiving his undergraduate education from the University of Kansas in 2007, he then went on to complete dental school at Southern Illinois University School of Dental Medicine, where he received his Doctor of Dental Medicine (DMD).

He is a member of multiple organizations, including the American Dental Association, the Colorado Dental Association, the Academy of General Dentistry, and the Denver Implant Study Club. Most notably, he is the 2019 Vice President of the Boulder/Broomfield County Dental Society and a recipient of the peer-nominated 5280 Best Dentist Award for 2018 and 2019. Dr. Sigman has received recognition from the Seattle Study Club as well as the Horace G. Wells Award for Excellence in Dental Anesthesiology. He is also the only dentist in the Boulder area who is a member of the Academy of Sports Dentistry. 

Dr. Sigman has been practicing in Boulder since 2012, and he opened Performance Dental Center in 2016. He loves meeting and interacting with all the awesome people in Boulder and helping them achieve their health goals. In addition, he has acquired co-ownership of successful family dental offices in Denver and Aurora, Colorado. 

Outside of dentistry, Dr. Sigman enjoys rock climbing, riding his bike, hiking, and skiing. He also enjoys spending his time with his black lab, Slash.

Slash Sigman

Director of Clinical Morale

Slash has been with Performance Dental Center since the first day, and while he doesn't have any formal training, he's completed thorough on-the-job training. He loves getting to meet the patients, and is rewarded for his hard work with daily treats and belly rubs.

When he's not at the office, he can be found enjoying bones, walks, and long naps.




A Healthy smile is just a click away.
Big plus is they offer a great in-house dental plan.
Big plus is they offer a great in-house dental plan.

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