Dr. Liu

Dr. Liu graduated from the University of Florida with a Bachelor of Science degree in Food Science and Human Nutrition. He then attended the University of Maryland School of Dental Surgery for his dental degree. He is a member of the Colorado Dental Association, American Dental Association, and the Metro Denver Dental Society. Dr. Liu enjoys taking continuing education courses to provide up-to-date and quality evidence-based dentistry for his patients. He was recently named one of Colorado's Top Dentists by 5280 Magazine.

When not providing quality care for his patients, Dr. Liu enjoys carving the mountains on his snowboard and hiking in the winter. When snow is scarce, you'll find him flying down roads on his road bike or hiking up Colorado 14ers. He also enjoys rock climbing, photography, and scuba diving.


Joanne, our Office Manager, graduated from the University of Colorado in 1997 with a Liberal Arts Degree in Mathematics. She has been working in the dental field for over 20 years and is proficient in appointment scheduling, insurance coordination of benefits and financial arrangements. She assists patients in keeping within their dental budget and is an excellent resource to help obtain outside financing when necessary.

Outside of the office, Joanne enjoys spending time with her husband and their three boys, keeping up with friends, going to church, traveling, and skiing.


Katrina, RDH, our hygienist, graduated dental hygiene school in Detroit, MI and has practiced dental hygiene since 2007. She joined Dr. Rippe in 2008. Katrina coordinates hygiene treatment and assists in the diagnostic process. She provides exceptional professional dental cleanings and periodontal therapy to improve gum health. You will find that Katrina's witty nature and gentle touch makes routine treatment fun and interesting.

Katrina's passion for dentistry has lead her on many mission trips in Colorado and internationally. Outside of the office, Katrina enjoys spending her free time volunteering, snowboarding, hiking, traveling, doing home improvements and spending time with her dog.


Miranda, our lead dental assistant, is a Colorado native that moved to the Denver area from Colorado Springs over 2 years ago. Since her move, she has enjoyed working for Dr. Rippe while attending Metropolitan State University for a degree in Sports Medicine. Miranda received her Associate's Degree in Applied Sciences in Dentistry five years ago.

Her favorite part of the job? Miranda loves taking care of patients, and she strives to make their experiences here fun and relaxing.

Outside of the office, she spends her free time in the mountains camping, hiking, and snowboarding.


Alisha is our new Dental Assistant! She graduated with honors in 2011 from the dental assisting program at Everest College in Aurora, CO. Having only been in the dental field for a short period of time, she’s worked hard to perfect and improve her skills. With a growing passion for dentistry, she’s excited to keep learning with Dr. Rippe and the team!

Alisha moved to Colorado from Tampa, Florida, in 1993 and grew up in Kiowa (way out in the sticks!). She is now a devoted, proud mom of a beautiful, outgoing two-and-a-half-year-old boy named Canten. In her free time, she enjoys going outside: whether it be playing catch, going for a hike, or getting her tan (burn!) on. She also spends a lot of time at the gym, hangs out with family and friends, and enjoys some morning time with Canten watching Mickey Mouse Clubhouse! On occasion, you’ll find her losing horribly at video games with her dad, or watching some good ‘ol Colorado sports on her own.


Jasmine, our Scheduling Coordinator, is the friendly voice that will greet you on the phone or at the door. Jasmine is a Colorado native and graduated from Highlands Ranch High School in 2007 where she was actively part of the golf team. She also enjoys Colorado's rich history.

A true lover of people, Jasmine is a great fit for the front desk team. With her positive attitude and great customer service she makes it easy and efficient to schedule appointments. Jasmine believes in building great relationships with her co-workers as well as patients.

In her free time she enjoys spending time with family, working out, hiking, photography, running, traveling, and just relaxing. She enjoys life to the fullest and loves to have fun with friends.

 Call for an appointment:
(720) 239-1662

Make an Appointment
Rippe Dental Associates
Practice Photo

Christian D Rippe, DDS

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Rippe Dental Associates
7180 East Orchard Rd
Suite 301
Centennial, CO 80111
General Info: (720) 239-1662
Comfortable, Affordable Care

 Call for an appointment:
(720) 239-1662

Make an Appointment