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About Your Dentist

About Your Dentist

Jennifer Tharp, DDS

Your dentist is a member of the doctor mastery program

Dr. Tharp, DDS is an esteemed member of the Doctor Mastery Program. The five-year program consists of clinical training conducted by world renowned clinicians, from building on foundational skills and advancing to mastery of the most complex dental care.

"My goal is for my O'Fallon area patients to leave my dentist office feeling that they were treated with compassion, respect, & fairness. I want to know that my patients tell their friends about their 'wonderful' dentist."

My Mission:

"My mission is to provide high-quality, personalized dentistry in O'Fallon that will make my patients feel comfortable and completely at ease."

Background & Education:

Dr. Tharp earned her Bachelor of Science Degree in Biology with a minor in Chemistry from the University of Missouri - St. Louis. She earned her Doctorate Degree in Dental Surgery from the University of Missouri School of Dentistry in Kansas City.

Dr. Tharp completed her General Practice Residency at the Naval Hospital at Camp Pendleton in California.

She is an active member of the American Dental Association and the Missouri Dental Association.

Personal Attention Professional Excellence:

"I have sincere concern for my patients and want to partner with you as a facilitator to provide you with the high quality dentistry you deserve. I have a servant's heart and truly enjoy making a positive change in your dental treatment. When I hear words from my patients such as 'Why was I so worried?' or 'That was the most painless appointment I've ever had,' it lets me know I am doing things right.

My team and I love caring for our patients and helping improve their lives. We offer complete, state-of-the-art dental care, with a commitment to honoring and caring for the needs and desires of the people we serve. Our vision is to provide the highest quality of dental care and to transform the quality of life of our patients and their loved ones in profound ways.

We want to give you the ultimate experience in dental care and show how much we truly care about you and your oral health!"

Julianne Ruppel, DDS

"Good dental care and orthodontics begins with good communication."

My Mission

"I genuinely care about my patients and want to be accessible to them. Seeing my patient's personalities and attitudes transform along with their smiles makes me incredibly happy. The younger kids are always my favorite patients, but teens and adults make a close second!"


  • Illinois Wesleyan University – Bloomington, IL
  • University of Illinois at Chicago College of Dentistry – Chicago, IL

Continuing Education & Professional Memberships

  • Advocate Illinois Masonic Medical Center – Chicago, IL
  • Saint Louis University Center for Advanced Dental Education – St. Louis, MO
  • Invisalign continuing education
  • American Association of Orthodontics
  • American Dental Association

Life & Hobbies

In her free time, Dr. Ruppel enjoys spending time with family, traveling, skiing and scuba diving. She is a member of the Missouri Botanical Garden.