Our Dentists

We’re a group of highly experienced dentists who share a philosophy of preventative and conservative care.

Partners

Mark G. Beck, D.D.S.

Dr. Beck grew up in Affton and graduated from St. Louis University High School. Upon completing a Biology degree at St Louis University, he received his dental degree from the University of Missouri – Kansas City School of Dentistry. He has served on the Board of Directors of the Greater St. Louis Dental Society and has been on staff at the Community Health in Partnership (CHiPS) free clinic on North Grand for over 20 years. Dr. Beck is also a member of the American College of Dentists, the South County District Dental Society and the Missouri Academy of Pediatric Dentistry. He has been with Sunset Hills Dental Group since 1981.

Edward C. Hotz, D.D.S.

Dr. Hotz grew up in Marion, Ohio. After receiving a degree in Biology at St. Louis University, he graduated from Ohio State University Dental School. Dr. Hotz then served two years as a dentist at Scott Air Force Base in Belleville, Illinois. While at Scott AFB, he did post-graduate rotations in oral surgery, periodontics and prosthodontics. Dr. Hotz has been with Sunset Hills Dental Group since 1977.

Julia Hotz-Sudekum, D.D.S.

Dr. Hotz-Sudekum grew up in Sunset Hills and graduated from Cor Jesu Academy. She attended the University of Missouri – Kansas City, from which she received a degree in Biology and her dental degree from the six year combined BA/DDS program. Upon graduation, Dr Hotz-Sudekum completed a one year advanced education in General Dentistry Residency, also at the University of Missouri – Kansas City. She has enjoyed working as a dentist with Sunset Hills Dental Group since 2001.

Daniel A. Kaufmann, D.D.S.

Dr. Kaufmann grew up in South St. Louis County, where he attended Lindbergh High School. He graduated from Drury College in Springfield, Missouri with degrees in Biology and Chemistry before receiving his dental degree from the University of Missouri – Kansas City School of Dentistry. After practicing on Tesson Ferry for seven years, he joined Sunset Hills Dental Group in 1993.

Elena C. Zerega, D.D.S.

Dr. Zerega grew up in Webster Groves and graduated from Cor Jesu Academy. She received a Bachelor of Science degree in Biology, with a Spanish minor, from the University of San Francisco. She received her dental degree from the University of California, San Francisco School of Dentistry. Dr. Zerega is a member of the South County District Dental Society. She has been affiliated with Sunset Hills Dental Group since 2007 and in 2010 became the first female partner in the group.

Associates

Matthew M. Barker, D.D.S.

Dr. Barker was raised in Wildwood, MO and currently lives in Kirkwood. He graduated from St. Louis University High School and then the University of Missouri - Columbia, with a Bachelors degree in Biology. He also earned a Masters degree in Biology from Washington University, before graduating from the University of Missouri - Kansas City School of Dentistry in 2011. Dr. Barker practiced dentistry with Affinia Healthcare before joining Sunset Hills Dental Group in 2015. He is also a member of the MO Valley Dental Study Club.

Christopher G. Haffner, D.D.S.

Dr. Haffner grew up in St. Louis Hills.  He graduated from St. Louis University High School and received a Bachelors degree in Biology from the University of Missouri St. Louis. After taking some time off to travel, Dr. Haffner graduated from the University of Missouri – Kansas City School of Dentistry. He has been with Sunset Hills Dental Group since 1985.

John W. Schaefer, D.D.S.

Dr. Schaefer grew up in the St. Louis area, and earned his Bachelor of Science degree in Biological Sciences from Southern Illinois University Edwardsville. He received his dental degree from the University of Florida, and his Certificate in Periodontics from the Louisiana State University Health Sciences Center in New Orleans. Dr. Schaefer has also earned certification as a Diplomate of the American Board of Periodontology. This is a rigorous process consisting of written and oral examinations covering all aspects of periodontal treatment and dental implants. Dr. Schaefer also maintains membership in the American Academy of Periodontology and the International Congress of Oral Implantology.