About Your Dentist

Jennifer Tharp, DDS

"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!"

Alyssa Phinney, DMD

The Dental Prayer:

Lord, be with me daily as I practice Dentistry.

May I treat with gentle hands all who put their trust in me.

May my calm assurance help to erase their fears.

To relax the tense adults and dry the childs tears.

May I treat each patient with competence and skill.

Whether a difficult procedure or a tooth that I must fill.

And reward me with my patients lovely, healthy smile!


My Mission

To help and serve as many people in need as possible. My favorite part of dentistry is the patient interaction. I want to be very involved in my community, not just as a dentist, but as a friend to my patients.


Southern Illinois University Carbondale, Bachelor of Science in Biological Sciences Carbondale, IL

ATSU-Missouri School of Dentistry and Oral Health, Doctorate of Dental Medicine Kirksville, MO

Continuing Education & Professional Memberships

Dr. Phinney is currently an active member of the Missouri Dental Association, American Dental Association, Academy of General Dentistry and American Association of Public Health Dentistry. She is committed to continuing education in order to remain knowledgeable with state-of-the-art technology, procedures and materials in dentistry.

Life & Hobbies

Dr. Phinney is a simple girl! She loves her family and friends. She has a dog named Louie, who is like her child. When she isn't practicing dentistry, Dr. Phinney enjoys running, swimming, hunting, fishing and participating in water sports.

Julianne Ruppel, DDS,MS


"It is my greatest privilege to treat patients in the art and science of orthodontics."

My Mission

"I genuinely care about my patients and want to be accessible to them during their orthodontic journey. Being an orthodontist is my passion, and I take pride in providing excellent care in a warm and friendly environment. I use the lastest technologies to make the 'orthodontic experience' as efficient and painless as possible.

Witnessing a patient's personality and attitude transform, along with their smile, makes me incredibly happy. The younger kids are my favorite patients, but teens and adults are a close second!"


Illinois Wesleyan University, Bachelor of Arts – Bloomington, IL

University of Illinois at Chicago College of Dentistry, Doctorate of Dental Science – Chicago, IL

Saint Louis University Center for Advanced Dental Education, Orthodontic Certificate and Master of Science in Dentistry – St. Louis, MO

Publications & Professional Memberships

"The Americleft Project: A Comparison of Short- and Longer-Term Secondary Alveolar Bone Graft Outcomes in Two Centers Using the Standardized Way to Access Grafts Scale" The Cleft Palate-Craniofacial Journal. Published September 2016.

Dr. Ruppel is currently an active member of the Orthodontic Education and Research Foundation, American Association of Orthodontists, and American Dental Association.

Life & Hobbies

In her free time, Dr. Ruppel enjoys spending time with her husband and daughter, as well as traveling, skiing, and scuba diving. She is a member of the Missouri Botanical Garden and St. Louis Art Museum.