Dr. Dan is in his 44th year of dentistry and has enjoyed every minute.  As technology and materials improved, so has dental care.  He truly enjoys studying the science of what really works, and more importantly, what doesn’t.

For the last few years, patients have asked him when he was going to retire. His response has always been, “as long as I enjoy it and as long as I can perform at an excellent level, I will continue”.

Dr. Dan is not retiring, but he has planned an inexact exit strategy merging his practice with Dr. Jeff Sindelar and Dr. Chris Guilfoy of Oakville Dental Care, one block down the street.   Dr. Sindelar and Dr. Guilfoy will each spend one day a week treating and meeting as many of you as possible while Dr. Dan is still practicing.

Everything else remains the same.  Same office, same hours, same location, and the same staff you’ve enjoyed for years.  They use the same materials and refer to the same specialists Dr. Dan has recommended to you for years.  He continues to practice with them those two days and solo the other two days each week.

Dr. Rathgeber has trained with some of the world's most prominent family dental specialists, and is well known as St Louis's leading dentist for people who want family dentistry.


Dr. Sindelar graduated with highest honors from the University of Missouri-Kansas City School of Dentistry, where he earned a Doctorate of Dental Sciences. He also has a Bachelor of Science degree from the University of Missouri-Columbia.

Dr. Sindelar is a member of the American Academy of Cosmetic Dentistry, the American Dental Association, the Academy of General Dentistry, the Missouri Dental Association and Omicron Kappa Upsilon, an honorary dental society. He’s also a member of the American Academy of Sleep Dentistry and regularly participates in continuing education on sleep dentistry. Dr. Sindelar is also a member of the Spear Study Club, an international educational organization for restorative and cosmetic dentists.

Dr. Sindelar believes that strong relationships are fundamental to excellent patient care, and this includes relationships with specialists as well as patients themselves. He works with many of the top specialists in the area, and prides himself on bringing the right team of professionals together to deliver the best experience and results possible.

He strives to provide top-notch service in all aspects of dental care, taking a particular interest in cosmetic dentistry. Dr. Sindelar loves creating gorgeous smiles and helping patients look and feel their best.

Dr. Sindelar grew up in the Oakville area and currently resides in Sunset Hills with his wife, Janna, an elementary school teacher, and their children, Jackson, Addison, and Emily. He enjoys supporting local charities, community sports teams, and the Make A Wish Foundation. Before becoming a dentist, Dr. Sindelar had a career of sorts in patient care. As a high school student, he dressed up as Percy the Mercy Bear to entertain children at St. John’s Hospital.


Dr. Guilfoy earned a Doctorate in Dental Surgery from the University of Missouri-Kansas City School of Dentistry. He also holds a Bachelor of Science in Exercise Science from Creighton University in Omaha, Nebraska.

Growing up the oldest of three boys in Webster Groves, Dr. Guilfoy drew upon his love of art and science and the inspiration provided by his pediatric dentist, Dr. Gerald Albrecht when deciding to pursue a career in dentistry. Dr. Guilfoy made frequent visits to his pediatric dentist and always had a pleasant experience. He strives to provide this same pleasant experience to each of his patients.

Dr. Guilfoy has been a partner with Dr. Sindelar at Oakville Dental Care since 2014, and loves the ability to use the best technologies for patient comfort and care, including Same Day Crowns (Cerec). In addition to the local and national memberships of the American Dental Association, Dr. Guilfoy is also a member of the Spear Study Club and the International Dental Implant Association, where he is a fellow and has advanced training in dental implant placement. He is very fortunate to be practicing in Oakville, where his wife, Bri, grew up to not only to provide the highest quality of care to his patients, but also to give back and be a part of the growing Oakville community.

In his free time, Dr. Guilfoy spends his time with his wife Bri and their son, Harrison. He enjoys countless hours competing on the racquetball courts and playing with their two golden retrievers, Chief and LuLu. Dr. Guilfoy is an avid Cardinals and Blues fan, so expect to hear him yapping about the ups and downs of their seasons as the years progress.

5637 Telegraph Road

St. Louis, MO 63129

Open Hours

M 9-5/T 12-8/W 9-5/Th 8-4

(314) 892-4445

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