Meet our team 

C. Bruce Hasenauer, DDS, Founder (Retired)

In 1998 Dr. Bruce Hasenauer received a phone call from a retirement community–would he provide on-site dental services? His love of people moved him and the challenge of it all motivated him. Soon Dr. Bruce and his son, Dr. Corey, were serving several communities in the evenings and on weekends. 

The journey began with equipment that could fit in the car. As the needs grew, so did the breadth of services and the vehicle! Soon the equipment was housed in a van and then a trailer and finally a delivery truck. Dr. Bruce was called out of his teaching career and back to Centennial.

His return sparked the vision for a self-contained clinic on wheels. A Los Angeles transit bus was purchased and converted to a full-service, state-of-the-art dental clinic. At the beginning of 2008 a second clinic was revealed and plans for the third were in motion not long after. Dr. Corey and his wife have since moved back east to be close to her family.

Bruce Hasenauer, D.D.S. is a graduate of Loma Linda University. He practiced in Centennial for almost 25 years before moving back to Loma Linda–this time as a professor. While in private practice, Dr. Bruce co-founded Hampden Dental College, a training program for dental assistants. Presently, he provides on-going oral health training for the Alzheimer’s Association. He also serves as the Board Chairman of The Healing Place, a downtown program designed to bring healing to the homeless. Dr. Bruce and his wife, Sheryl, also have two grown daughters, two handsome sons-in-law and a trio of delightful grandchildren. Dr. Bruce enjoys the Beatles, movies and sculpting. 

Dr. Hasenauer retired in April of 2022 and moved to Tennessee to be with his family and grandchildren but he will always be a part of Access Mobile Dental!   

Richard Ramsey, DDS

Dr. Ramsey graduated from Texas Tech University in Lubbock, Texas with a degree in Biology in 1992 and received his Doctor of Dental Surgery from the University of Texas Health Sciences Center Dental School in San Antonio, Texas in 1996. He continued his education, earning his MBA from Texas Tech University in 2011. 

He is a member of the American Dental Association, Colorado Dental Association, Metro Denver Dental Society and Boulder-Broomfield County Dental Society.

Dr. Ramsey is passionate about providing a comfortable and informative patient experience. A lifelong learner, he stays current on advancements in dentistry in order to provide quality-focused dental care.

One of his proudest achievements from his youth was being awarded the rank of Eagle Scout. While practicing in Texas, Dr. Ramsey washonored as one of the Best Dentists in Dallas by his dental peers in “D” Magazine. When not providing care to his patients, he enjoys spending time with his wife and dogs, staying active, hiking, traveling and exploring our beautiful state of Colorado. In addition, he has a deep appreciation for music, having played drums professionally before becoming a dentist. 

Brian Ozenbaugh, DDS 

Bio Coming Soon!

Jason Difani, DDS

Dr. Difani was born and raised in Central Illinois. He attended the University of Illinois, earning degrees in Biology and Chemistry. He received his dental degree from the University of Illinois at Chicago College of Dentistry in 2009. He practiced for four years in Chicago before moving to Denver in 2013 to start a business and grow his family. He has two children, Avery and Hudson, two dogs, Chloe and Penny, and two cats, Rocket and Oliver. His wife, Kristen, is a Colorado native and works in Denver Public Schools. 

Dr. Dennis Burgner, DDS

Education and Experience:

  • DDS – The University of Texas Dental School – Houston, 1972
  • BS – Biology/Chemistry, Southern Nazarene University, Bethany, OK, 1969
  • Specialty Rotation Residency – United States Army / Womack Army Hospital
  • L.D. Pankey Institute for Advanced Dental Education – Alumni
  • The Dawson Academy Advanced Restorative Principles and Procdures-Alumni
  • Over 3,000 hours Post Graduate Dental Education

Professional Awards:

Master – Academy of General Dentistry (M.A.G.D.)
Fellow – Academy of General Dentistry (F.A.G.D.)
Lifetime Learning and Service Award – Academy of General Dentistry (Currently the only dentist in Colorado to earn this award)
5280 Recipient – Top Dentists in Colorado
Lifelong Learning and Service Recognition (the only Colorado dentist to receive this honor)

Professional Memberships:

Academy of General Dentistry (AGD)
Colorado Academy of General Dentistry – Board of Directors
American Academy of Cosmetic Dentistry
Colorado Academy of Cosmetic Dentistry
Colorado Academy of Implant Dentistry,
Colorado Laser Dentistry Study Club
Dental Organization for Conscious Sedation (D.O.C.S.)
Colorado Academy of Osseointegration (Implants)
Colorado ITI (International Implant Team for Implantology) Study Club

“After interviewing a local dentist for a high-school project, I took an immediate interest in the profession. I already loved the sciences and working with my hands, so dental care seemed perfect for me. It would also let me use my leadership qualities and further develop my dexterity. Best of all, I could help people. Now, after more than 30 years, I count my blessings each day for the rewards my career has given me.”

Bart Scott, Director of Marketing and Development

Bio Coming Soon! 

Serena, DHT Coordinator and Office Adminstration

Serena has been part of the Access Mobile Dental team in nearly every way! Since 2009, Serena has served our patients as a dental assistant, in the office, and as the coordinator of our Dental Hygiene Therapy program. She is thorough and thoughtful, has a robust knowledge of our patients and dental care for seniors, and is a joy to work with. 

Jennifer, Dental Assistant                                        

A great patient experience is achievable thanks to great dental assistants. Jennifer, Ruth Anne, and Luz are a compassionate and caring team that work hard to ensure an excellent experience for every patient. Our dental assistants go beyond the traditional operatory to ensure that our services are accessible and safe.

Rachel, Dental Assistant

Rachel is a born and raised Colorado native and a single mother to four children. In her spare time she loves to cross stitch, knit, reading books or swimming. Since working in the dental field, she has specifically learned to love what she does even more now that she works with senior patients daily. Rachel says she “can’t wait to meet your loved ones and hopefully put a smile on their face.”  

Tammy, Dental Assistant 

Bio Coming Soon!